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Comparing Coro/Coro/State.xs (file contents):
Revision 1.19 by root, Sun Jul 29 01:11:41 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"
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
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
6 50
7#ifdef HAVE_MMAP 51#ifdef HAVE_MMAP
8# include <unistd.h> 52# include <unistd.h>
9# include <sys/mman.h> 53# include <sys/mman.h>
10# ifndef MAP_ANON
11# ifdef MAP_ANONYMOUS 54# ifndef MAP_ANONYMOUS
12# define MAP_ANON MAP_ANONYMOUS 55# ifdef MAP_ANON
56# define MAP_ANONYMOUS MAP_ANON
13# else 57# else
14# undef HAVE_MMAP 58# undef HAVE_MMAP
15# endif 59# endif
16# 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
17#endif 68# endif
18
19#define MAY_FLUSH /* increases codesize */
20
21/* perl-related */
22#define TRANSFER_SAVE_DEFAV 0x00000001
23#define TRANSFER_SAVE_DEFSV 0x00000002
24#define TRANSFER_SAVE_ERRSV 0x00000004
25/* c-related */
26#define TRANSFER_SAVE_CCTXT 0x00000008
27#ifdef CORO_LAZY_STACK
28# define TRANSFER_LAZY_STACK 0x00000010
29#else 69#else
30# define TRANSFER_LAZY_STACK 0x00000000 70# define PAGESIZE 0
71# define BOOT_PAGESIZE (void)0
31#endif 72#endif
32 73
33#define TRANSFER_SAVE_ALL (TRANSFER_SAVE_DEFAV|TRANSFER_SAVE_DEFSV \
34 |TRANSFER_SAVE_ERRSV|TRANSFER_SAVE_CCTXT)
35
36#define SUB_INIT "Coro::State::initialize"
37#define UCORO_STATE "_coro_state"
38
39/* 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
40 * to the current C stack pointer. It's property is that it changes with each call 75 * to the current C stack pointer. Its property is that it changes with each call
41 * and should be unique. */ 76 * and should be unique. */
77#define dSTACKLEVEL int stacklevel
42#define dSTACKLEVEL void *stacklevel = &stacklevel 78#define STACKLEVEL ((void *)&stacklevel)
43 79
44#define labs(l) ((l) >= 0 ? (l) : -(l)) 80#define IN_DESTRUCT (PL_main_cv == Nullcv)
45 81
46/* this is actually not only the c stack but also c registers etc... */ 82#if __GNUC__ >= 3
83# define attribute(x) __attribute__(x)
84#else
85# define attribute(x)
86#endif
87
88#define NOINLINE attribute ((noinline))
89
90#include "CoroAPI.h"
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
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 */
107
108static struct coro_cctx *cctx_first;
109static int cctx_count, cctx_idle;
110
111/* this is a structure representing a c-level coroutine */
47typedef struct { 112typedef struct coro_cctx {
48 int refcnt; /* pointer reference counter */ 113 struct coro_cctx *next;
49 int usecnt; /* shared by how many coroutines */
50 int gencnt; /* generation counter */
51 114
52 coro_context cctx; 115 /* the stack */
53
54 void *sptr; 116 void *sptr;
55 long ssize; /* positive == mmap, otherwise malloc */ 117 long ssize; /* positive == mmap, otherwise malloc */
56} coro_stack;
57 118
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 */
58struct coro { 130struct coro {
59 /* the optional C context */ 131 /* the c coroutine allocated to this perl coroutine, if any */
60 coro_stack *stack; 132 coro_cctx *cctx;
61 void *cursp; 133
134 /* data associated with this coroutine (initial args) */
135 AV *args;
62 int gencnt; 136 int refcnt;
63 137
64 /* optionally saved, might be zero */ 138 /* optionally saved, might be zero */
65 AV *defav; 139 AV *defav;
66 SV *defsv; 140 SV *defsv;
67 SV *errsv; 141 SV *errsv;
68 142
69 /* saved global state not related to stacks */ 143#define VAR(name,type) type name;
70 U8 dowarn; 144# include "state.h"
71 I32 in_eval; 145#undef VAR
72 146
73 /* the stacks and related info (callchain etc..) */ 147 /* coro process data */
74 PERL_SI *curstackinfo; 148 int prio;
75 AV *curstack;
76 AV *mainstack;
77 SV **stack_sp;
78 OP *op;
79 SV **curpad;
80 SV **stack_base;
81 SV **stack_max;
82 SV **tmps_stack;
83 I32 tmps_floor;
84 I32 tmps_ix;
85 I32 tmps_max;
86 I32 *markstack;
87 I32 *markstack_ptr;
88 I32 *markstack_max;
89 I32 *scopestack;
90 I32 scopestack_ix;
91 I32 scopestack_max;
92 ANY *savestack;
93 I32 savestack_ix;
94 I32 savestack_max;
95 OP **retstack;
96 I32 retstack_ix;
97 I32 retstack_max;
98 COP *curcop;
99 JMPENV *top_env;
100
101 /* data associated with this coroutine (initial args) */
102 AV *args;
103}; 149};
104 150
105typedef struct coro *Coro__State; 151typedef struct coro *Coro__State;
106typedef struct coro *Coro__State_or_hashref; 152typedef struct coro *Coro__State_or_hashref;
107 153
108static AV *main_mainstack; /* used to differentiate between $main and others */ 154static AV *
109static HV *coro_state_stash; 155coro_clone_padlist (CV *cv)
110static SV *ucoro_state_sv;
111static U32 ucoro_state_hash;
112static HV *padlist_cache;
113
114/* mostly copied from op.c:cv_clone2 */
115STATIC AV *
116clone_padlist (AV *protopadlist)
117{ 156{
118 AV *av; 157 AV *padlist = CvPADLIST (cv);
119 I32 ix;
120 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
121 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
122 SV **pname = AvARRAY (protopad_name);
123 SV **ppad = AvARRAY (protopad);
124 I32 fname = AvFILLp (protopad_name);
125 I32 fpad = AvFILLp (protopad);
126 AV *newpadlist, *newpad_name, *newpad; 158 AV *newpadlist, *newpad;
127 SV **npad;
128
129 newpad_name = newAV ();
130 for (ix = fname; ix >= 0; ix--)
131 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
132
133 newpad = newAV ();
134 av_fill (newpad, AvFILLp (protopad));
135 npad = AvARRAY (newpad);
136 159
137 newpadlist = newAV (); 160 newpadlist = newAV ();
138 AvREAL_off (newpadlist); 161 AvREAL_off (newpadlist);
139 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)));
140 av_store (newpadlist, 1, (SV *) newpad); 171 av_store (newpadlist, 1, (SV *)newpad);
141 172
142 av = newAV (); /* will be @_ */ 173 return newpadlist;
143 av_extend (av, 0); 174}
144 av_store (newpad, 0, (SV *) av);
145 AvFLAGS (av) = AVf_REIFY;
146 175
147 for (ix = fpad; ix > 0; ix--) 176static void
177free_padlist (AV *padlist)
178{
179 /* may be during global destruction */
180 if (SvREFCNT (padlist))
148 { 181 {
149 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 182 I32 i = AvFILLp (padlist);
150 if (namesv && namesv != &PL_sv_undef) 183 while (i >= 0)
151 { 184 {
152 char *name = SvPVX (namesv); /* XXX */ 185 SV **svp = av_fetch (padlist, i--, FALSE);
153 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 186 if (svp)
154 { /* lexical from outside? */
155 npad[ix] = SvREFCNT_inc (ppad[ix]);
156 } 187 {
157 else
158 { /* our own lexical */
159 SV *sv; 188 SV *sv;
160 if (*name == '&') 189 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
161 sv = SvREFCNT_inc (ppad[ix]); 190 SvREFCNT_dec (sv);
162 else if (*name == '@') 191
163 sv = (SV *) newAV (); 192 SvREFCNT_dec (*svp);
164 else if (*name == '%')
165 sv = (SV *) newHV ();
166 else
167 sv = NEWSV (0, 0);
168 if (!SvPADBUSY (sv))
169 SvPADMY_on (sv);
170 npad[ix] = sv;
171 } 193 }
172 } 194 }
173 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix])) 195
174 { 196 SvREFCNT_dec ((SV*)padlist);
175 npad[ix] = SvREFCNT_inc (ppad[ix]);
176 }
177 else
178 {
179 SV *sv = NEWSV (0, 0);
180 SvPADTMP_on (sv);
181 npad[ix] = sv;
182 }
183 } 197 }
198}
184 199
185#if 0 /* return -ENOTUNDERSTOOD */ 200static int
186 /* 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;
187 205
188 for (ix = fpad; ix > 0; ix--) { 206 /* casting is fun. */
189 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv; 207 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
190 if (namesv 208 free_padlist (padlist);
191 && namesv != &PL_sv_undef 209
192 && !(SvFLAGS(namesv) & SVf_FAKE) 210 SvREFCNT_dec (av);
193 && *SvPVX(namesv) == '&' 211
194 && CvCLONE(ppad[ix])) 212 return 0;
195 { 213}
196 CV *kid = cv_clone((CV*)ppad[ix]); 214
197 SvREFCNT_dec(ppad[ix]); 215#define PERL_MAGIC_coro PERL_MAGIC_ext
198 CvCLONE_on(kid); 216
199 SvPADMY_on(kid); 217static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
200 npad[ix] = (SV*)kid; 218
201 } 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 ();
202 } 252 }
203#endif
204 253
205 return newpadlist;
206}
207
208#ifdef MAY_FLUSH
209STATIC AV *
210free_padlist (AV *padlist)
211{
212 /* may be during global destruction */
213 if (SvREFCNT(padlist))
214 {
215 I32 i = AvFILLp(padlist);
216 while (i >= 0)
217 {
218 SV **svp = av_fetch(padlist, i--, FALSE);
219 SV *sv = svp ? *svp : Nullsv;
220 if (sv)
221 SvREFCNT_dec(sv);
222 }
223
224 SvREFCNT_dec((SV*)padlist);
225 }
226}
227#endif
228
229/* the next two functions merely cache the padlists */
230STATIC void
231get_padlist (CV *cv)
232{
233 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
234
235 if (he && AvFILLp ((AV *)*he) >= 0)
236 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
237 else
238 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
239}
240
241STATIC void
242put_padlist (CV *cv)
243{
244 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
245
246 if (SvTYPE (*he) != SVt_PVAV)
247 {
248 SvREFCNT_dec (*he);
249 *he = (SV *)newAV ();
250 }
251
252 av_push ((AV *)*he, (SV *)CvPADLIST (cv)); 254 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));
253} 255}
254
255#ifdef MAY_FLUSH
256STATIC void
257flush_padlist_cache ()
258{
259 HV *hv = padlist_cache;
260 padlist_cache = newHV ();
261
262 if (hv_iterinit (hv))
263 {
264 HE *he;
265 AV *padlist;
266
267 while (!!(he = hv_iternext (hv)))
268 {
269 AV *av = (AV *)HeVAL(he);
270
271 /* casting is fun. */
272 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
273 free_padlist (padlist);
274 }
275 }
276
277 SvREFCNT_dec (hv);
278}
279#endif
280 256
281#define SB do { 257#define SB do {
282#define SE } while (0) 258#define SE } while (0)
283 259
284#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE 260#define LOAD(state) load_state((state));
285#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE 261#define SAVE(state,flags) save_state((state),(flags));
286 262
287#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
288 264
289static void 265static void
290load_state(pTHX_ Coro__State c) 266load_state(Coro__State c)
291{ 267{
292 PL_dowarn = c->dowarn; 268#define VAR(name,type) PL_ ## name = c->name;
293 PL_in_eval = c->in_eval; 269# include "state.h"
294 270#undef VAR
295 PL_curstackinfo = c->curstackinfo;
296 PL_curstack = c->curstack;
297 PL_mainstack = c->mainstack;
298 PL_stack_sp = c->stack_sp;
299 PL_op = c->op;
300 PL_curpad = c->curpad;
301 PL_stack_base = c->stack_base;
302 PL_stack_max = c->stack_max;
303 PL_tmps_stack = c->tmps_stack;
304 PL_tmps_floor = c->tmps_floor;
305 PL_tmps_ix = c->tmps_ix;
306 PL_tmps_max = c->tmps_max;
307 PL_markstack = c->markstack;
308 PL_markstack_ptr = c->markstack_ptr;
309 PL_markstack_max = c->markstack_max;
310 PL_scopestack = c->scopestack;
311 PL_scopestack_ix = c->scopestack_ix;
312 PL_scopestack_max = c->scopestack_max;
313 PL_savestack = c->savestack;
314 PL_savestack_ix = c->savestack_ix;
315 PL_savestack_max = c->savestack_max;
316 PL_retstack = c->retstack;
317 PL_retstack_ix = c->retstack_ix;
318 PL_retstack_max = c->retstack_max;
319 PL_curcop = c->curcop;
320 PL_top_env = c->top_env;
321 271
322 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 272 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
323 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 273 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
324 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 274 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
325 275
… …
334 284
335 if (padlist) 285 if (padlist)
336 { 286 {
337 put_padlist (cv); /* mark this padlist as available */ 287 put_padlist (cv); /* mark this padlist as available */
338 CvPADLIST(cv) = padlist; 288 CvPADLIST(cv) = padlist;
339#ifdef USE_THREADS
340 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
341#endif
342 } 289 }
343 290
344 ++CvDEPTH(cv); 291 ++CvDEPTH(cv);
345 } 292 }
346 293
347 PUTBACK; 294 PUTBACK;
348 } 295 }
349} 296}
350 297
351static void 298static void
352save_state(pTHX_ Coro__State c, int flags) 299save_state(Coro__State c, int flags)
353{ 300{
354 { 301 {
355 dSP; 302 dSP;
356 I32 cxix = cxstack_ix; 303 I32 cxix = cxstack_ix;
357 PERL_CONTEXT *ccstk = cxstack; 304 PERL_CONTEXT *ccstk = cxstack;
… …
364 311
365 PUSHs (Nullsv); 312 PUSHs (Nullsv);
366 /* this loop was inspired by pp_caller */ 313 /* this loop was inspired by pp_caller */
367 for (;;) 314 for (;;)
368 { 315 {
369 do 316 while (cxix >= 0)
370 { 317 {
371 PERL_CONTEXT *cx = &ccstk[cxix--]; 318 PERL_CONTEXT *cx = &ccstk[cxix--];
372 319
373 if (CxTYPE(cx) == CXt_SUB) 320 if (CxTYPE(cx) == CXt_SUB)
374 { 321 {
375 CV *cv = cx->blk_sub.cv; 322 CV *cv = cx->blk_sub.cv;
376 if (CvDEPTH(cv)) 323 if (CvDEPTH(cv))
377 { 324 {
378#ifdef USE_THREADS
379 /*XPUSHs ((SV *)CvOWNER(cv));*/
380 /*CvOWNER(cv) = 0;*/
381 /*error must unlock this cv etc.. etc...*/
382#endif
383 EXTEND (SP, CvDEPTH(cv)*2); 325 EXTEND (SP, CvDEPTH(cv)*2);
384 326
385 while (--CvDEPTH(cv)) 327 while (--CvDEPTH(cv))
386 { 328 {
387 /* this tells the restore code to increment CvDEPTH */ 329 /* this tells the restore code to increment CvDEPTH */
… …
390 } 332 }
391 333
392 PUSHs ((SV *)CvPADLIST(cv)); 334 PUSHs ((SV *)CvPADLIST(cv));
393 PUSHs ((SV *)cv); 335 PUSHs ((SV *)cv);
394 336
395 get_padlist (cv); /* this is a monster */ 337 get_padlist (cv);
396 } 338 }
397 } 339 }
340#ifdef CXt_FORMAT
398 else if (CxTYPE(cx) == CXt_FORMAT) 341 else if (CxTYPE(cx) == CXt_FORMAT)
399 { 342 {
400 /* 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? */
401 /* my bold guess is as a simple, plain sub... */ 344 /* my bold guess is as a simple, plain sub... */
402 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");
403 } 346 }
347#endif
404 } 348 }
405 while (cxix >= 0);
406 349
407 if (top_si->si_type == PERLSI_MAIN) 350 if (top_si->si_type == PERLSI_MAIN)
408 break; 351 break;
409 352
410 top_si = top_si->si_prev; 353 top_si = top_si->si_prev;
… …
417 360
418 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;
419 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 362 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
420 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 363 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
421 364
422 /* I have not the slightest idea of why av_reify is necessary */ 365#define VAR(name,type)c->name = PL_ ## name;
423 /* but if it's missing the defav contents magically get replaced sometimes */ 366# include "state.h"
424 if (c->defav) 367#undef VAR
425 av_reify (c->defav);
426
427 c->dowarn = PL_dowarn;
428 c->in_eval = PL_in_eval;
429
430 c->curstackinfo = PL_curstackinfo;
431 c->curstack = PL_curstack;
432 c->mainstack = PL_mainstack;
433 c->stack_sp = PL_stack_sp;
434 c->op = PL_op;
435 c->curpad = PL_curpad;
436 c->stack_base = PL_stack_base;
437 c->stack_max = PL_stack_max;
438 c->tmps_stack = PL_tmps_stack;
439 c->tmps_floor = PL_tmps_floor;
440 c->tmps_ix = PL_tmps_ix;
441 c->tmps_max = PL_tmps_max;
442 c->markstack = PL_markstack;
443 c->markstack_ptr = PL_markstack_ptr;
444 c->markstack_max = PL_markstack_max;
445 c->scopestack = PL_scopestack;
446 c->scopestack_ix = PL_scopestack_ix;
447 c->scopestack_max = PL_scopestack_max;
448 c->savestack = PL_savestack;
449 c->savestack_ix = PL_savestack_ix;
450 c->savestack_max = PL_savestack_max;
451 c->retstack = PL_retstack;
452 c->retstack_ix = PL_retstack_ix;
453 c->retstack_max = PL_retstack_max;
454 c->curcop = PL_curcop;
455 c->top_env = PL_top_env;
456} 368}
457 369
458/* 370/*
459 * allocate various perl stacks. This is an exact copy 371 * allocate various perl stacks. This is an exact copy
460 * of perl.c:init_stacks, except that it uses less memory 372 * of perl.c:init_stacks, except that it uses less memory
461 * on the assumption that coroutines do not usually need 373 * on the (sometimes correct) assumption that coroutines do
462 * a lot of stackspace. 374 * not usually need a lot of stackspace.
463 */ 375 */
464STATIC void 376static void
465coro_init_stacks (pTHX) 377coro_init_stacks ()
466{ 378{
467 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 379 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
468 PL_curstackinfo->si_type = PERLSI_MAIN; 380 PL_curstackinfo->si_type = PERLSI_MAIN;
469 PL_curstack = PL_curstackinfo->si_stack; 381 PL_curstack = PL_curstackinfo->si_stack;
470 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 382 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
… …
480 392
481 New(54,PL_markstack,16,I32); 393 New(54,PL_markstack,16,I32);
482 PL_markstack_ptr = PL_markstack; 394 PL_markstack_ptr = PL_markstack;
483 PL_markstack_max = PL_markstack + 16; 395 PL_markstack_max = PL_markstack + 16;
484 396
397#ifdef SET_MARK_OFFSET
485 SET_MARK_OFFSET; 398 SET_MARK_OFFSET;
399#endif
486 400
487 New(54,PL_scopestack,16,I32); 401 New(54,PL_scopestack,16,I32);
488 PL_scopestack_ix = 0; 402 PL_scopestack_ix = 0;
489 PL_scopestack_max = 16; 403 PL_scopestack_max = 16;
490 404
491 New(54,PL_savestack,96,ANY); 405 New(54,PL_savestack,96,ANY);
492 PL_savestack_ix = 0; 406 PL_savestack_ix = 0;
493 PL_savestack_max = 96; 407 PL_savestack_max = 96;
494 408
409#if !PERL_VERSION_ATLEAST (5,9,0)
495 New(54,PL_retstack,8,OP*); 410 New(54,PL_retstack,8,OP*);
496 PL_retstack_ix = 0; 411 PL_retstack_ix = 0;
497 PL_retstack_max = 8; 412 PL_retstack_max = 8;
413#endif
498} 414}
499 415
500/* 416/*
501 * destroy the stacks, the callchain etc... 417 * destroy the stacks, the callchain etc...
502 * still there is a memleak of 128 bytes...
503 */ 418 */
504STATIC void 419static void
505destroy_stacks(pTHX) 420coro_destroy_stacks ()
506{ 421{
422 if (!IN_DESTRUCT)
423 {
507 /* is this ugly, I ask? */ 424 /* is this ugly, I ask? */
508 while (PL_scopestack_ix) 425 LEAVE_SCOPE (0);
509 LEAVE;
510 426
511 /* sure it is, but more important: is it correct?? :/ */ 427 /* sure it is, but more important: is it correct?? :/ */
512 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
513 FREETMPS; 428 FREETMPS;
429
430 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
431 }
514 432
515 while (PL_curstackinfo->si_next) 433 while (PL_curstackinfo->si_next)
516 PL_curstackinfo = PL_curstackinfo->si_next; 434 PL_curstackinfo = PL_curstackinfo->si_next;
517 435
518 while (PL_curstackinfo) 436 while (PL_curstackinfo)
519 { 437 {
520 PERL_SI *p = PL_curstackinfo->si_prev; 438 PERL_SI *p = PL_curstackinfo->si_prev;
521 439
522 { 440 { /*D*//*remove*/
523 dSP; 441 dSP;
524 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack); 442 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
525 PUTBACK; /* possibly superfluous */ 443 PUTBACK; /* possibly superfluous */
526 } 444 }
527 445
528 dounwind(-1); 446 if (!IN_DESTRUCT)
529 447 {
448 dounwind (-1);/*D*//*remove*/
530 SvREFCNT_dec(PL_curstackinfo->si_stack); 449 SvREFCNT_dec (PL_curstackinfo->si_stack);
450 }
451
531 Safefree(PL_curstackinfo->si_cxstack); 452 Safefree (PL_curstackinfo->si_cxstack);
532 Safefree(PL_curstackinfo); 453 Safefree (PL_curstackinfo);
533 PL_curstackinfo = p; 454 PL_curstackinfo = p;
534 } 455 }
535 456
536 Safefree(PL_tmps_stack); 457 Safefree (PL_tmps_stack);
537 Safefree(PL_markstack); 458 Safefree (PL_markstack);
538 Safefree(PL_scopestack); 459 Safefree (PL_scopestack);
539 Safefree(PL_savestack); 460 Safefree (PL_savestack);
461#if !PERL_VERSION_ATLEAST (5,9,0)
540 Safefree(PL_retstack); 462 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#ifdef 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_ANON, 0, 0);
558 if (stack->sptr == (void *)-1)
559#endif 463#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} 464}
571 465
572static void 466static void
573deallocate_stack (Coro__State ctx) 467setup_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{ 468{
600 /* 469 /*
601 * emulate part of the perl startup here. 470 * emulate part of the perl startup here.
602 */ 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{
603 dSP; 518 dSP;
604 Coro__State ctx = (Coro__State)arg; 519 LOGOP myop;
605 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
606 520
607 coro_init_stacks (aTHX); 521 Zero (&myop, 1, LOGOP);
608 /*PL_curcop = 0;*/ 522 myop.op_next = PL_op;
609 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 523 myop.op_flags = OPf_WANT_VOID;
610 SvREFCNT_dec (GvAV (PL_defgv));
611 GvAV (PL_defgv) = ctx->args;
612 524
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);
613 SPAGAIN; 531 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);
635 myop.op_next = Nullop;
636 myop.op_flags = OPf_WANT_VOID;
637
638 PUSHMARK(SP);
639 XPUSHs (sub_init);
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;
648 PL_op = pp_entersub();
649 SPAGAIN;
650
651 ENTER; /* necessary e.g. for dounwind */
652 }
653} 532}
654 533
655static void 534static void
656continue_coro (void *arg) 535coro_run (void *arg)
657{ 536{
537 /* coro_run is the alternative epilogue of transfer() */
538 UNLOCK;
539
658 /* 540 /*
659 * this is a _very_ stripped down perl interpreter ;) 541 * this is a _very_ stripped down perl interpreter ;)
660 */ 542 */
661 Coro__State ctx = (Coro__State)arg; 543 PL_top_env = &PL_start_env;
662 544
663 /*FIXME*//* must set up top_env here */ 545 /* inject call to cctx_init */
664 ctx->cursp = 0; 546 prepare_cctx ((coro_cctx *)arg);
665 PL_op = PL_op->op_next;
666 CALLRUNOPS(aTHX);
667 547
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);
668 abort (); 552 abort ();
669} 553}
670 554
671STATIC 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
672transfer(pTHX_ struct coro *prev, struct coro *next, int flags) 656transfer (struct coro *prev, struct coro *next, int flags)
673{ 657{
674 dSP;
675 dSTACKLEVEL; 658 dSTACKLEVEL;
676 659
660 /* sometimes transfer is only called to set idle_sp */
661 if (flags == TRANSFER_SET_STACKLEVEL)
662 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
677 if (prev != next) 663 else if (prev != next)
678 { 664 {
665 coro_cctx *prev__cctx;
666
667 LOCK;
668
679 if (next->mainstack) 669 if (next->mainstack)
680 { 670 {
671 /* coroutine already started */
681 SAVE (prev, flags); 672 SAVE (prev, flags);
682 LOAD (next); 673 LOAD (next);
683
684 /* mark this state as in-use */
685 next->mainstack = 0;
686 next->tmps_ix = -2;
687
688 /* stacklevel changed? if yes, grab the stack for us! */
689 if (flags & TRANSFER_SAVE_CCTXT)
690 {
691 if (!prev->stack)
692 allocate_stack (prev, 0);
693 else if (prev->cursp != stacklevel
694 && prev->stack->usecnt > 1)
695 {
696 prev->gencnt = ++prev->stack->gencnt;
697 prev->stack->usecnt = 1;
698 }
699
700 /* has our stack been invalidated? */
701 if (next->stack && next->stack->gencnt != next->gencnt)
702 {
703 deallocate_stack (next);
704 allocate_stack (next, 1);
705 coro_create (&(next->stack->cctx),
706 continue_coro, (void *)next,
707 next->stack->sptr, labs (next->stack->ssize));
708 }
709
710 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
711 }
712
713 } 674 }
714 else if (next->tmps_ix == -2)
715 croak ("tried to transfer to running coroutine");
716 else 675 else
717 { 676 {
677 /* need to start coroutine */
718 SAVE (prev, -1); /* first get rid of the old state */ 678 /* first get rid of the old state */
719 679 SAVE (prev, -1);
720 if (flags & TRANSFER_SAVE_CCTXT) 680 /* setup coroutine call */
721 {
722 if (!prev->stack)
723 allocate_stack (prev, 0);
724
725 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
726 {
727 setup_coro (next);
728
729 prev->stack->refcnt++;
730 prev->stack->usecnt++;
731 next->stack = prev->stack;
732 next->gencnt = prev->gencnt;
733 }
734 else
735 {
736 allocate_stack (next, 1);
737 coro_create (&(next->stack->cctx),
738 setup_coro, (void *)next,
739 next->stack->sptr, labs (next->stack->ssize));
740 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
741 }
742 }
743 else
744 setup_coro (next); 681 setup_coro (next);
682 /* need a stack */
683 next->cctx = 0;
745 } 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;
746 } 712 }
713}
747 714
748 next->cursp = stacklevel; 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};
779
780static struct coro *
781SvSTATE (SV *coro)
782{
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)
791 {
792 /* very slow, but rare, check */
793 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
794 croak ("Coro::State object required");
795 }
796
797 mg = SvMAGIC (coro);
798 assert (mg->mg_type == PERL_MAGIC_ext);
799 return (struct coro *)mg->mg_ptr;
800}
801
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
811api_transfer (SV *prev, SV *next, int flags)
812{
813 dTHX;
814 struct transfer_args ta;
815
816 prepare_transfer (&ta, prev, next, flags);
817 TRANSFER (ta);
818}
819
820/** Coro ********************************************************************/
821
822#define PRIO_MAX 3
823#define PRIO_HIGH 1
824#define PRIO_NORMAL 0
825#define PRIO_LOW -1
826#define PRIO_IDLE -3
827#define PRIO_MIN -4
828
829/* for Coro.pm */
830static GV *coro_current, *coro_idle;
831static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
832static int coro_nready;
833
834static void
835coro_enq (SV *sv)
836{
837 int prio;
838
839 if (SvTYPE (sv) != SVt_PVHV)
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++;
846}
847
848static SV *
849coro_deq (int min_prio)
850{
851 int prio = PRIO_MAX - PRIO_MIN;
852
853 min_prio -= PRIO_MIN;
854 if (min_prio < 0)
855 min_prio = 0;
856
857 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
858 if (AvFILLp (coro_ready [prio]) >= 0)
859 {
860 coro_nready--;
861 return av_shift (coro_ready [prio]);
862 }
863
864 return 0;
865}
866
867static void
868api_ready (SV *coro)
869{
870 dTHX;
871
872 if (SvROK (coro))
873 coro = SvRV (coro);
874
875 LOCK;
876 coro_enq (SvREFCNT_inc (coro));
877 UNLOCK;
878}
879
880static void
881prepare_schedule (struct transfer_args *ta)
882{
883 SV *current, *prev, *next;
884
885 current = GvSV (coro_current);
886
887 for (;;)
888 {
889 LOCK;
890 next = coro_deq (PRIO_MIN);
891 UNLOCK;
892
893 if (next)
894 break;
895
896 {
897 dSP;
898
899 ENTER;
900 SAVETMPS;
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);
749} 953}
750 954
751MODULE = Coro::State PACKAGE = Coro::State 955MODULE = Coro::State PACKAGE = Coro::State
752 956
753PROTOTYPES: ENABLE 957PROTOTYPES: DISABLE
754 958
755BOOT: 959BOOT:
756{ /* {} necessary for stoopid perl-5.6.x */ 960{
757 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 961#ifdef USE_ITHREADS
758 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 962 MUTEX_INIT (&coro_mutex);
963#endif
964 BOOT_PAGESIZE;
965
759 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 966 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
760 967
761 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 968 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
762 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 969 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
763 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 970 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
764 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
765
766 if (!padlist_cache)
767 padlist_cache = newHV ();
768 971
769 main_mainstack = PL_mainstack; 972 main_mainstack = PL_mainstack;
770}
771 973
772Coro::State 974 coroapi.ver = CORO_API_VERSION;
773_newprocess(args) 975 coroapi.transfer = api_transfer;
774 SV * args 976
775 PROTOTYPE: $ 977 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
978}
979
980SV *
981new (char *klass, ...)
776 CODE: 982 CODE:
777 Coro__State coro; 983{
984 struct coro *coro;
985 HV *hv;
986 int i;
778 987
779 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
780 croak ("Coro::State::_newprocess expects an arrayref");
781
782 New (0, coro, 1, struct coro); 988 Newz (0, coro, 1, struct coro);
989 coro->args = newAV ();
783 990
784 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 991 hv = newHV ();
785 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;
786 coro->stack = 0; 993 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
787 994
788 RETVAL = coro; 995 for (i = 1; i < items; i++)
996 av_push (coro->args, newSVsv (ST (i)));
997}
789 OUTPUT: 998 OUTPUT:
790 RETVAL 999 RETVAL
791 1000
792void 1001void
793transfer(prev, next, flags = TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK) 1002_set_stacklevel (...)
794 Coro::State_or_hashref prev 1003 ALIAS:
795 Coro::State_or_hashref next 1004 Coro::State::transfer = 1
796 int flags 1005 Coro::schedule = 2
797 PROTOTYPE: @ 1006 Coro::cede = 3
1007 Coro::Cont::yield = 4
798 CODE: 1008 CODE:
799 transfer (aTHX_ prev, next, flags); 1009{
1010 struct transfer_args ta;
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}
800 1065
801void 1066void
802DESTROY(coro) 1067_clone_state_from (SV *dst, SV *src)
803 Coro::State coro 1068 CODE:
1069{
1070 struct coro *coro_src = SvSTATE (src);
1071
1072 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1073
1074 ++coro_src->refcnt;
1075 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1076}
1077
1078void
1079_exit (code)
1080 int code
1081 PROTOTYPE: $
1082 CODE:
1083 _exit (code);
1084
1085int
1086cctx_count ()
1087 CODE:
1088 RETVAL = cctx_count;
1089 OUTPUT:
1090 RETVAL
1091
1092int
1093cctx_idle ()
1094 CODE:
1095 RETVAL = cctx_idle;
1096 OUTPUT:
1097 RETVAL
1098
1099MODULE = Coro::State PACKAGE = Coro
1100
1101BOOT:
1102{
1103 int i;
1104
1105 coro_stash = gv_stashpv ("Coro", TRUE);
1106
1107 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1108 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1109 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1110 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1111 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1112 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1113
1114 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1115 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1116
1117 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
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
804 CODE: 1139 CODE:
1140{
1141 RETVAL = coro->prio;
805 1142
806 if (coro->mainstack && coro->mainstack != main_mainstack) 1143 if (items > 1)
807 { 1144 {
808 struct coro temp; 1145 if (ix)
1146 newprio += coro->prio;
809 1147
810 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 1148 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
811 LOAD(aTHX_ coro); 1149 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
812 1150
813 destroy_stacks (aTHX); 1151 coro->prio = newprio;
814
815 LOAD((&temp)); /* this will get rid of defsv etc.. */
816
817 coro->mainstack = 0;
818 } 1152 }
819 1153}
820 deallocate_stack (coro);
821
822 Safefree (coro);
823 1154
824void 1155void
825flush() 1156ready (SV *self)
1157 PROTOTYPE: $
826 CODE: 1158 CODE:
827#ifdef MAY_FLUSH 1159 api_ready (self);
828 flush_padlist_cache ();
829#endif
830 1160
1161int
1162nready (...)
1163 PROTOTYPE:
1164 CODE:
1165 RETVAL = coro_nready;
1166 OUTPUT:
1167 RETVAL
1168
831MODULE = Coro::State PACKAGE = Coro::Cont 1169MODULE = Coro::State PACKAGE = Coro::AIO
832 1170
833# this is slightly dirty 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
834 1191
835void 1192void
836yield(...) 1193_set_state (char *data_)
837 PROTOTYPE: @ 1194 PROTOTYPE: $
838 CODE: 1195 CODE:
839 static SV *returnstk; 1196{
840 SV *sv; 1197 struct {
841 AV *defav = GvAV (PL_defgv); 1198 int errorno;
842 struct coro *prev, *next; 1199 int laststype;
1200 int laststatval;
1201 Stat_t statcache;
1202 } *data = (void *)data_;
843 1203
844 if (!returnstk) 1204 errno = data->errorno;
845 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 1205 PL_laststype = data->laststype;
846 1206 PL_laststatval = data->laststatval;
847 /* set up @_ -- ugly */ 1207 PL_statcache = data->statcache;
848 av_clear (defav); 1208}
849 av_fill (defav, items - 1);
850 while (items--)
851 av_store (defav, items, SvREFCNT_inc (ST(items)));
852
853 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
854 sv = av_pop ((AV *)SvRV (returnstk));
855 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
856 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
857 SvREFCNT_dec (sv);
858
859 transfer(aTHX_ prev, next, 0);
860

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