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Comparing Coro/Coro/State.xs (file contents):
Revision 1.63 by root, Mon Mar 21 14:35:22 2005 UTC vs.
Revision 1.130 by root, Mon Dec 25 13:25:55 2006 UTC

1#define PERL_NO_GET_CONTEXT
2
3#include "libcoro/coro.c" 1#include "libcoro/coro.c"
4 2
5#include "EXTERN.h" 3#include "EXTERN.h"
6#include "perl.h" 4#include "perl.h"
7#include "XSUB.h" 5#include "XSUB.h"
8 6
9#include "patchlevel.h" 7#include "patchlevel.h"
10 8
11#if PATCHLEVEL < 6 9#include <stdio.h>
10#include <errno.h>
11#include <assert.h>
12
13#ifdef HAVE_MMAP
14# include <unistd.h>
15# include <sys/mman.h>
16# ifndef MAP_ANONYMOUS
17# ifdef MAP_ANON
18# define MAP_ANONYMOUS MAP_ANON
19# else
20# undef HAVE_MMAP
21# endif
22# endif
23# include <limits.h>
24# ifndef PAGESIZE
25# define PAGESIZE pagesize
26# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
27static long pagesize;
28# else
29# define BOOT_PAGESIZE (void)0
30# endif
31#else
32# define PAGESIZE 0
33# define BOOT_PAGESIZE (void)0
34#endif
35
36#if USE_VALGRIND
37# include <valgrind/valgrind.h>
38#endif
39
40/* the maximum number of idle cctx that will be pooled */
41#define MAX_IDLE_CCTX 8
42
43#define PERL_VERSION_ATLEAST(a,b,c) \
44 (PERL_REVISION > (a) \
45 || (PERL_REVISION == (a) \
46 && (PERL_VERSION > (b) \
47 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
48
49#if !PERL_VERSION_ATLEAST (5,6,0)
12# ifndef PL_ppaddr 50# ifndef PL_ppaddr
13# define PL_ppaddr ppaddr 51# define PL_ppaddr ppaddr
14# endif 52# endif
15# ifndef call_sv 53# ifndef call_sv
16# define call_sv perl_call_sv 54# define call_sv perl_call_sv
… …
27# ifndef IS_PADCONST 65# ifndef IS_PADCONST
28# define IS_PADCONST(v) 0 66# define IS_PADCONST(v) 0
29# endif 67# endif
30#endif 68#endif
31 69
32#include <signal.h> 70/* 5.8.7 */
33 71#ifndef SvRV_set
34#ifdef HAVE_MMAP 72# define SvRV_set(s,v) SvRV(s) = (v)
35# include <unistd.h>
36# include <sys/mman.h>
37# ifndef MAP_ANONYMOUS
38# ifdef MAP_ANON
39# define MAP_ANONYMOUS MAP_ANON
40# else
41# undef HAVE_MMAP
42# endif
43# endif 73#endif
44#endif
45 74
46#define SUB_INIT "Coro::State::initialize" 75#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
47#define UCORO_STATE "_coro_state" 76# undef STACKGUARD
77#endif
78
79#ifndef STACKGUARD
80# define STACKGUARD 0
81#endif
82
83/* prefer perl internal functions over our own? */
84#ifndef PREFER_PERL_FUNCTIONS
85# define PREFER_PERL_FUNCTIONS 0
86#endif
48 87
49/* The next macro should declare a variable stacklevel that contains and approximation 88/* The next macro should declare a variable stacklevel that contains and approximation
50 * to the current C stack pointer. Its property is that it changes with each call 89 * to the current C stack pointer. Its property is that it changes with each call
51 * and should be unique. */ 90 * and should be unique. */
91#define dSTACKLEVEL int stacklevel
52#define dSTACKLEVEL void *stacklevel = &stacklevel 92#define STACKLEVEL ((void *)&stacklevel)
53 93
54#define IN_DESTRUCT (PL_main_cv == Nullcv) 94#define IN_DESTRUCT (PL_main_cv == Nullcv)
55 95
56#define labs(l) ((l) >= 0 ? (l) : -(l)) 96#if __GNUC__ >= 3
97# define attribute(x) __attribute__(x)
98#else
99# define attribute(x)
100#endif
101
102#define NOINLINE attribute ((noinline))
57 103
58#include "CoroAPI.h" 104#include "CoroAPI.h"
59 105
60#ifdef USE_ITHREADS 106#ifdef USE_ITHREADS
61static perl_mutex coro_mutex; 107static perl_mutex coro_mutex;
62# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 108# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 109# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
64#else 110#else
65# define LOCK 0 111# define LOCK (void)0
66# define UNLOCK 0 112# define UNLOCK (void)0
67#endif 113#endif
114
115struct io_state
116{
117 int errorno;
118 I32 laststype;
119 int laststatval;
120 Stat_t statcache;
121};
68 122
69static struct CoroAPI coroapi; 123static struct CoroAPI coroapi;
70static AV *main_mainstack; /* used to differentiate between $main and others */ 124static AV *main_mainstack; /* used to differentiate between $main and others */
71static HV *coro_state_stash; 125static HV *coro_state_stash, *coro_stash;
72static SV *ucoro_state_sv;
73static U32 ucoro_state_hash;
74static SV *coro_mortal; /* will be freed after next transfer */ 126static SV *coro_mortal; /* will be freed after next transfer */
75 127
76/* this is actually not only the c stack but also c registers etc... */ 128static struct coro_cctx *cctx_first;
129static int cctx_count, cctx_idle;
130
131/* this is a structure representing a c-level coroutine */
77typedef struct { 132typedef struct coro_cctx {
78 int refcnt; /* pointer reference counter */ 133 struct coro_cctx *next;
79 int usecnt; /* shared by how many coroutines */
80 int gencnt; /* generation counter */
81 134
82 coro_context cctx; 135 /* the stack */
83
84 void *sptr; 136 void *sptr;
85 long ssize; /* positive == mmap, otherwise malloc */ 137 long ssize; /* positive == mmap, otherwise malloc */
86} coro_stack;
87 138
139 /* cpu state */
140 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
141 JMPENV *top_env;
142 coro_context cctx;
143
144 int inuse;
145
146#if USE_VALGRIND
147 int valgrind_id;
148#endif
149} coro_cctx;
150
151enum {
152 CF_RUNNING = 0x0001, /* coroutine is running */
153 CF_READY = 0x0002, /* coroutine is ready */
154 CF_NEW = 0x0004, /* ahs never been switched to */
155};
156
157/* this is a structure representing a perl-level coroutine */
88struct coro { 158struct coro {
89 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 159 /* the c coroutine allocated to this perl coroutine, if any */
90 JMPENV start_env; 160 coro_cctx *cctx;
91
92 /* the optional C context */
93 coro_stack *stack;
94 void *cursp;
95 int gencnt;
96
97 /* optionally saved, might be zero */
98 AV *defav;
99 SV *defsv;
100 SV *errsv;
101
102 /* saved global state not related to stacks */
103 U8 dowarn;
104 I32 in_eval;
105
106 /* the stacks and related info (callchain etc..) */
107 PERL_SI *curstackinfo;
108 AV *curstack;
109 AV *mainstack;
110 SV **stack_sp;
111 OP *op;
112 SV **curpad;
113 AV *comppad;
114 CV *compcv;
115 SV **stack_base;
116 SV **stack_max;
117 SV **tmps_stack;
118 I32 tmps_floor;
119 I32 tmps_ix;
120 I32 tmps_max;
121 I32 *markstack;
122 I32 *markstack_ptr;
123 I32 *markstack_max;
124 I32 *scopestack;
125 I32 scopestack_ix;
126 I32 scopestack_max;
127 ANY *savestack;
128 I32 savestack_ix;
129 I32 savestack_max;
130 OP **retstack;
131 I32 retstack_ix;
132 I32 retstack_max;
133 COP *curcop;
134 JMPENV *top_env;
135 161
136 /* data associated with this coroutine (initial args) */ 162 /* data associated with this coroutine (initial args) */
137 AV *args; 163 AV *args;
164 int refcnt;
165 int save; /* CORO_SAVE flags */
166 int flags; /* CF_ flags */
167
168 /* optionally saved, might be zero */
169 AV *defav; /* @_ */
170 SV *defsv; /* $_ */
171 SV *errsv; /* $@ */
172 SV *irssv; /* $/ */
173 SV *irssv_sv; /* real $/ cache */
174
175#define VAR(name,type) type name;
176# include "state.h"
177#undef VAR
178
179 /* coro process data */
180 int prio;
138}; 181};
139 182
140typedef struct coro *Coro__State; 183typedef struct coro *Coro__State;
141typedef struct coro *Coro__State_or_hashref; 184typedef struct coro *Coro__State_or_hashref;
142 185
143/* mostly copied from op.c:cv_clone2 */ 186static AV *
144STATIC AV * 187coro_clone_padlist (CV *cv)
145clone_padlist (pTHX_ AV *protopadlist)
146{ 188{
147 AV *av; 189 AV *padlist = CvPADLIST (cv);
148 I32 ix;
149 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
150 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
151 SV **pname = AvARRAY (protopad_name);
152 SV **ppad = AvARRAY (protopad);
153 I32 fname = AvFILLp (protopad_name);
154 I32 fpad = AvFILLp (protopad);
155 AV *newpadlist, *newpad_name, *newpad; 190 AV *newpadlist, *newpad;
156 SV **npad;
157
158 newpad_name = newAV ();
159 for (ix = fname; ix >= 0; ix--)
160 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
161
162 newpad = newAV ();
163 av_fill (newpad, AvFILLp (protopad));
164 npad = AvARRAY (newpad);
165 191
166 newpadlist = newAV (); 192 newpadlist = newAV ();
167 AvREAL_off (newpadlist); 193 AvREAL_off (newpadlist);
168 av_store (newpadlist, 0, (SV *) newpad_name); 194#if PERL_VERSION_ATLEAST (5,9,0)
195 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
196#else
197 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
198#endif
199 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
200 --AvFILLp (padlist);
201
202 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
169 av_store (newpadlist, 1, (SV *) newpad); 203 av_store (newpadlist, 1, (SV *)newpad);
170
171 av = newAV (); /* will be @_ */
172 av_extend (av, 0);
173 av_store (newpad, 0, (SV *) av);
174 AvFLAGS (av) = AVf_REIFY;
175
176 for (ix = fpad; ix > 0; ix--)
177 {
178 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
179
180 if (namesv && namesv != &PL_sv_undef)
181 {
182 char *name = SvPVX (namesv); /* XXX */
183
184 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
185 { /* lexical from outside? */
186 npad[ix] = SvREFCNT_inc (ppad[ix]);
187 }
188 else
189 { /* our own lexical */
190 SV *sv;
191 if (*name == '&')
192 sv = SvREFCNT_inc (ppad[ix]);
193 else if (*name == '@')
194 sv = (SV *) newAV ();
195 else if (*name == '%')
196 sv = (SV *) newHV ();
197 else
198 sv = NEWSV (0, 0);
199
200#ifdef SvPADBUSY
201 if (!SvPADBUSY (sv))
202#endif
203 SvPADMY_on (sv);
204
205 npad[ix] = sv;
206 }
207 }
208 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
209 {
210 npad[ix] = SvREFCNT_inc (ppad[ix]);
211 }
212 else
213 {
214 SV *sv = NEWSV (0, 0);
215 SvPADTMP_on (sv);
216 npad[ix] = sv;
217 }
218 }
219
220#if 0 /* return -ENOTUNDERSTOOD */
221 /* Now that vars are all in place, clone nested closures. */
222
223 for (ix = fpad; ix > 0; ix--) {
224 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
225 if (namesv
226 && namesv != &PL_sv_undef
227 && !(SvFLAGS(namesv) & SVf_FAKE)
228 && *SvPVX(namesv) == '&'
229 && CvCLONE(ppad[ix]))
230 {
231 CV *kid = cv_clone((CV*)ppad[ix]);
232 SvREFCNT_dec(ppad[ix]);
233 CvCLONE_on(kid);
234 SvPADMY_on(kid);
235 npad[ix] = (SV*)kid;
236 }
237 }
238#endif
239 204
240 return newpadlist; 205 return newpadlist;
241} 206}
242 207
243STATIC void 208static void
244free_padlist (pTHX_ AV *padlist) 209free_padlist (AV *padlist)
245{ 210{
246 /* may be during global destruction */ 211 /* may be during global destruction */
247 if (SvREFCNT (padlist)) 212 if (SvREFCNT (padlist))
248 { 213 {
249 I32 i = AvFILLp (padlist); 214 I32 i = AvFILLp (padlist);
… …
262 227
263 SvREFCNT_dec ((SV*)padlist); 228 SvREFCNT_dec ((SV*)padlist);
264 } 229 }
265} 230}
266 231
267STATIC int 232static int
268coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 233coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
269{ 234{
270 AV *padlist; 235 AV *padlist;
271 AV *av = (AV *)mg->mg_obj; 236 AV *av = (AV *)mg->mg_obj;
272 237
273 /* casting is fun. */ 238 /* casting is fun. */
274 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 239 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
275 free_padlist (aTHX_ padlist); 240 free_padlist (padlist);
276 241
277 SvREFCNT_dec (av); 242 SvREFCNT_dec (av);
243
244 return 0;
278} 245}
279 246
280#define PERL_MAGIC_coro PERL_MAGIC_ext 247#define PERL_MAGIC_coro PERL_MAGIC_ext
281 248
282static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 249static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
283 250
251#define CORO_MAGIC(cv) \
252 SvMAGIC (cv) \
253 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
254 ? SvMAGIC (cv) \
255 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
256 : 0
257
284/* the next two functions merely cache the padlists */ 258/* the next two functions merely cache the padlists */
285STATIC void 259static void
286get_padlist (pTHX_ CV *cv) 260get_padlist (CV *cv)
287{ 261{
288 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 262 MAGIC *mg = CORO_MAGIC (cv);
263 AV *av;
289 264
290 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 265 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
291 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 266 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
292 else 267 else
268 {
269#if PREFER_PERL_FUNCTIONS
270 /* this is probably cleaner, but also slower? */
271 CV *cp = Perl_cv_clone (cv);
272 CvPADLIST (cv) = CvPADLIST (cp);
273 CvPADLIST (cp) = 0;
274 SvREFCNT_dec (cp);
275#else
293 CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv)); 276 CvPADLIST (cv) = coro_clone_padlist (cv);
277#endif
278 }
294} 279}
295 280
296STATIC void 281static void
297put_padlist (pTHX_ CV *cv) 282put_padlist (CV *cv)
298{ 283{
299 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 284 MAGIC *mg = CORO_MAGIC (cv);
285 AV *av;
300 286
301 if (!mg) 287 if (!mg)
302 { 288 {
303 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0); 289 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
304 mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 290 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
305 mg->mg_virtual = &vtbl_coro; 291 mg->mg_virtual = &vtbl_coro;
306 mg->mg_obj = (SV *)newAV (); 292 mg->mg_obj = (SV *)newAV ();
307 } 293 }
308 294
309 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 295 av = (AV *)mg->mg_obj;
296
297 if (AvFILLp (av) >= AvMAX (av))
298 av_extend (av, AvMAX (av) + 1);
299
300 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
310} 301}
311 302
312#define SB do { 303#define SB do {
313#define SE } while (0) 304#define SE } while (0)
314 305
315#define LOAD(state) load_state(aTHX_ (state));
316#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
317
318#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 306#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
319 307
320static void 308static void
321load_state(pTHX_ Coro__State c) 309load_perl (Coro__State c)
322{ 310{
323 PL_dowarn = c->dowarn; 311#define VAR(name,type) PL_ ## name = c->name;
324 PL_in_eval = c->in_eval; 312# include "state.h"
325 313#undef VAR
326 PL_curstackinfo = c->curstackinfo;
327 PL_curstack = c->curstack;
328 PL_mainstack = c->mainstack;
329 PL_stack_sp = c->stack_sp;
330 PL_op = c->op;
331 PL_curpad = c->curpad;
332 PL_comppad = c->comppad;
333 PL_compcv = c->compcv;
334 PL_stack_base = c->stack_base;
335 PL_stack_max = c->stack_max;
336 PL_tmps_stack = c->tmps_stack;
337 PL_tmps_floor = c->tmps_floor;
338 PL_tmps_ix = c->tmps_ix;
339 PL_tmps_max = c->tmps_max;
340 PL_markstack = c->markstack;
341 PL_markstack_ptr = c->markstack_ptr;
342 PL_markstack_max = c->markstack_max;
343 PL_scopestack = c->scopestack;
344 PL_scopestack_ix = c->scopestack_ix;
345 PL_scopestack_max = c->scopestack_max;
346 PL_savestack = c->savestack;
347 PL_savestack_ix = c->savestack_ix;
348 PL_savestack_max = c->savestack_max;
349 PL_retstack = c->retstack;
350 PL_retstack_ix = c->retstack_ix;
351 PL_retstack_max = c->retstack_max;
352 PL_curcop = c->curcop;
353 PL_top_env = c->top_env;
354 314
355 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 315 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
356 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 316 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
357 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 317 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
318 if (c->irssv)
319 {
320 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
321 SvREFCNT_dec (c->irssv);
322 else
323 {
324 REPLACE_SV (PL_rs, c->irssv);
325 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
326 sv_setsv (c->irssv_sv, PL_rs);
327 }
328 }
358 329
359 { 330 {
360 dSP; 331 dSP;
361 CV *cv; 332 CV *cv;
362 333
363 /* now do the ugly restore mess */ 334 /* now do the ugly restore mess */
364 while ((cv = (CV *)POPs)) 335 while ((cv = (CV *)POPs))
365 { 336 {
366 AV *padlist = (AV *)POPs;
367
368 if (padlist)
369 {
370 put_padlist (aTHX_ cv); /* mark this padlist as available */ 337 put_padlist (cv); /* mark this padlist as available */
371 CvPADLIST(cv) = padlist; 338 CvDEPTH (cv) = PTR2IV (POPs);
372 } 339 CvPADLIST (cv) = (AV *)POPs;
373
374 ++CvDEPTH(cv);
375 } 340 }
376 341
377 PUTBACK; 342 PUTBACK;
378 } 343 }
379} 344}
380 345
381static void 346static void
382save_state(pTHX_ Coro__State c, int flags) 347save_perl (Coro__State c)
383{ 348{
384 { 349 {
385 dSP; 350 dSP;
386 I32 cxix = cxstack_ix; 351 I32 cxix = cxstack_ix;
387 PERL_CONTEXT *ccstk = cxstack; 352 PERL_CONTEXT *ccstk = cxstack;
… …
390 /* 355 /*
391 * the worst thing you can imagine happens first - we have to save 356 * the worst thing you can imagine happens first - we have to save
392 * (and reinitialize) all cv's in the whole callchain :( 357 * (and reinitialize) all cv's in the whole callchain :(
393 */ 358 */
394 359
360 EXTEND (SP, 3 + 1);
395 PUSHs (Nullsv); 361 PUSHs (Nullsv);
396 /* this loop was inspired by pp_caller */ 362 /* this loop was inspired by pp_caller */
397 for (;;) 363 for (;;)
398 { 364 {
399 while (cxix >= 0) 365 while (cxix >= 0)
400 { 366 {
401 PERL_CONTEXT *cx = &ccstk[cxix--]; 367 PERL_CONTEXT *cx = &ccstk[cxix--];
402 368
403 if (CxTYPE(cx) == CXt_SUB) 369 if (CxTYPE (cx) == CXt_SUB)
404 { 370 {
405 CV *cv = cx->blk_sub.cv; 371 CV *cv = cx->blk_sub.cv;
372
406 if (CvDEPTH(cv)) 373 if (CvDEPTH (cv))
407 { 374 {
408 EXTEND (SP, CvDEPTH(cv)*2); 375 EXTEND (SP, 3);
409
410 while (--CvDEPTH(cv))
411 {
412 /* this tells the restore code to increment CvDEPTH */
413 PUSHs (Nullsv);
414 PUSHs ((SV *)cv);
415 }
416
417 PUSHs ((SV *)CvPADLIST(cv)); 376 PUSHs ((SV *)CvPADLIST (cv));
377 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
418 PUSHs ((SV *)cv); 378 PUSHs ((SV *)cv);
419 379
420 get_padlist (aTHX_ cv); /* this is a monster */ 380 CvDEPTH (cv) = 0;
381 get_padlist (cv);
421 } 382 }
422 } 383 }
423#ifdef CXt_FORMAT
424 else if (CxTYPE(cx) == CXt_FORMAT)
425 {
426 /* I never used formats, so how should I know how these are implemented? */
427 /* my bold guess is as a simple, plain sub... */
428 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
429 }
430#endif
431 } 384 }
432 385
433 if (top_si->si_type == PERLSI_MAIN) 386 if (top_si->si_type == PERLSI_MAIN)
434 break; 387 break;
435 388
… …
439 } 392 }
440 393
441 PUTBACK; 394 PUTBACK;
442 } 395 }
443 396
444 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 397 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
445 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 398 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
446 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 399 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
400 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
447 401
448 c->dowarn = PL_dowarn; 402#define VAR(name,type)c->name = PL_ ## name;
449 c->in_eval = PL_in_eval; 403# include "state.h"
450 404#undef VAR
451 c->curstackinfo = PL_curstackinfo;
452 c->curstack = PL_curstack;
453 c->mainstack = PL_mainstack;
454 c->stack_sp = PL_stack_sp;
455 c->op = PL_op;
456 c->curpad = PL_curpad;
457 c->comppad = PL_comppad;
458 c->compcv = PL_compcv;
459 c->stack_base = PL_stack_base;
460 c->stack_max = PL_stack_max;
461 c->tmps_stack = PL_tmps_stack;
462 c->tmps_floor = PL_tmps_floor;
463 c->tmps_ix = PL_tmps_ix;
464 c->tmps_max = PL_tmps_max;
465 c->markstack = PL_markstack;
466 c->markstack_ptr = PL_markstack_ptr;
467 c->markstack_max = PL_markstack_max;
468 c->scopestack = PL_scopestack;
469 c->scopestack_ix = PL_scopestack_ix;
470 c->scopestack_max = PL_scopestack_max;
471 c->savestack = PL_savestack;
472 c->savestack_ix = PL_savestack_ix;
473 c->savestack_max = PL_savestack_max;
474 c->retstack = PL_retstack;
475 c->retstack_ix = PL_retstack_ix;
476 c->retstack_max = PL_retstack_max;
477 c->curcop = PL_curcop;
478 c->top_env = PL_top_env;
479} 405}
480 406
481/* 407/*
482 * allocate various perl stacks. This is an exact copy 408 * allocate various perl stacks. This is an exact copy
483 * of perl.c:init_stacks, except that it uses less memory 409 * of perl.c:init_stacks, except that it uses less memory
484 * on the (sometimes correct) assumption that coroutines do 410 * on the (sometimes correct) assumption that coroutines do
485 * not usually need a lot of stackspace. 411 * not usually need a lot of stackspace.
486 */ 412 */
487STATIC void 413#if PREFER_PERL_FUNCTIONS
414# define coro_init_stacks init_stacks
415#else
416static void
488coro_init_stacks (pTHX) 417coro_init_stacks ()
489{ 418{
490 LOCK;
491
492 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 419 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
493 PL_curstackinfo->si_type = PERLSI_MAIN; 420 PL_curstackinfo->si_type = PERLSI_MAIN;
494 PL_curstack = PL_curstackinfo->si_stack; 421 PL_curstack = PL_curstackinfo->si_stack;
495 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 422 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
496 423
497 PL_stack_base = AvARRAY(PL_curstack); 424 PL_stack_base = AvARRAY(PL_curstack);
498 PL_stack_sp = PL_stack_base; 425 PL_stack_sp = PL_stack_base;
499 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 426 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
500 427
501 New(50,PL_tmps_stack,96,SV*); 428 New(50,PL_tmps_stack,128,SV*);
502 PL_tmps_floor = -1; 429 PL_tmps_floor = -1;
503 PL_tmps_ix = -1; 430 PL_tmps_ix = -1;
504 PL_tmps_max = 96; 431 PL_tmps_max = 128;
505 432
506 New(54,PL_markstack,16,I32); 433 New(54,PL_markstack,32,I32);
507 PL_markstack_ptr = PL_markstack; 434 PL_markstack_ptr = PL_markstack;
508 PL_markstack_max = PL_markstack + 16; 435 PL_markstack_max = PL_markstack + 32;
509 436
510#ifdef SET_MARK_OFFSET 437#ifdef SET_MARK_OFFSET
511 SET_MARK_OFFSET; 438 SET_MARK_OFFSET;
512#endif 439#endif
513 440
514 New(54,PL_scopestack,16,I32); 441 New(54,PL_scopestack,32,I32);
515 PL_scopestack_ix = 0; 442 PL_scopestack_ix = 0;
516 PL_scopestack_max = 16; 443 PL_scopestack_max = 32;
517 444
518 New(54,PL_savestack,96,ANY); 445 New(54,PL_savestack,64,ANY);
519 PL_savestack_ix = 0; 446 PL_savestack_ix = 0;
520 PL_savestack_max = 96; 447 PL_savestack_max = 64;
521 448
449#if !PERL_VERSION_ATLEAST (5,9,0)
522 New(54,PL_retstack,8,OP*); 450 New(54,PL_retstack,16,OP*);
523 PL_retstack_ix = 0; 451 PL_retstack_ix = 0;
524 PL_retstack_max = 8; 452 PL_retstack_max = 16;
525 453#endif
526 UNLOCK;
527} 454}
455#endif
528 456
529/* 457/*
530 * destroy the stacks, the callchain etc... 458 * destroy the stacks, the callchain etc...
531 */ 459 */
532STATIC void 460static void
533destroy_stacks(pTHX) 461coro_destroy_stacks ()
534{ 462{
535 if (!IN_DESTRUCT) 463 if (!IN_DESTRUCT)
536 { 464 {
537 /* is this ugly, I ask? */ 465 /* restore all saved variables and stuff */
538 LEAVE_SCOPE (0); 466 LEAVE_SCOPE (0);
467 assert (PL_tmps_floor == -1);
539 468
540 /* sure it is, but more important: is it correct?? :/ */ 469 /* free all temporaries */
541 FREETMPS; 470 FREETMPS;
471 assert (PL_tmps_ix == -1);
542 472
543 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/ 473 POPSTACK_TO (PL_mainstack);
544 } 474 }
545 475
546 while (PL_curstackinfo->si_next) 476 while (PL_curstackinfo->si_next)
547 PL_curstackinfo = PL_curstackinfo->si_next; 477 PL_curstackinfo = PL_curstackinfo->si_next;
548 478
549 while (PL_curstackinfo) 479 while (PL_curstackinfo)
550 { 480 {
551 PERL_SI *p = PL_curstackinfo->si_prev; 481 PERL_SI *p = PL_curstackinfo->si_prev;
552 482
553 { /*D*//*remove*/
554 dSP;
555 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
556 PUTBACK; /* possibly superfluous */
557 }
558
559 if (!IN_DESTRUCT) 483 if (!IN_DESTRUCT)
560 {
561 dounwind (-1);/*D*//*remove*/
562 SvREFCNT_dec (PL_curstackinfo->si_stack); 484 SvREFCNT_dec (PL_curstackinfo->si_stack);
563 }
564 485
565 Safefree (PL_curstackinfo->si_cxstack); 486 Safefree (PL_curstackinfo->si_cxstack);
566 Safefree (PL_curstackinfo); 487 Safefree (PL_curstackinfo);
567 PL_curstackinfo = p; 488 PL_curstackinfo = p;
568 } 489 }
569 490
570 Safefree (PL_tmps_stack); 491 Safefree (PL_tmps_stack);
571 Safefree (PL_markstack); 492 Safefree (PL_markstack);
572 Safefree (PL_scopestack); 493 Safefree (PL_scopestack);
573 Safefree (PL_savestack); 494 Safefree (PL_savestack);
495#if !PERL_VERSION_ATLEAST (5,9,0)
574 Safefree (PL_retstack); 496 Safefree (PL_retstack);
575}
576
577static void
578allocate_stack (Coro__State ctx, int alloc)
579{
580 coro_stack *stack;
581
582 New (0, stack, 1, coro_stack);
583
584 stack->refcnt = 1;
585 stack->usecnt = 1;
586 stack->gencnt = ctx->gencnt = 0;
587
588 if (alloc)
589 {
590#if HAVE_MMAP
591 stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
592 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
593 if (stack->sptr == (void *)-1)
594#endif 497#endif
595 {
596 /*FIXME*//*D*//* reasonable stack size! */
597 stack->ssize = - (8192 * sizeof (long));
598 New (0, stack->sptr, 8192, long);
599 }
600 }
601 else
602 stack->sptr = 0;
603
604 ctx->stack = stack;
605} 498}
606 499
607static void 500static void
608deallocate_stack (Coro__State ctx) 501setup_coro (struct coro *coro)
609{
610 coro_stack *stack = ctx->stack;
611
612 ctx->stack = 0;
613
614 if (stack)
615 {
616 if (!--stack->refcnt)
617 {
618#ifdef HAVE_MMAP
619 if (stack->ssize > 0 && stack->sptr)
620 munmap (stack->sptr, stack->ssize);
621 else
622#endif
623 Safefree (stack->sptr);
624
625 Safefree (stack);
626 }
627 else if (ctx->gencnt == stack->gencnt)
628 --stack->usecnt;
629 }
630}
631
632static void
633setup_coro (void *arg)
634{ 502{
635 /* 503 /*
636 * emulate part of the perl startup here. 504 * emulate part of the perl startup here.
637 */ 505 */
638 dTHX; 506
507 coro_init_stacks ();
508
509 PL_curcop = &PL_compiling;
510 PL_in_eval = EVAL_NULL;
511 PL_curpm = 0;
512 PL_localizing = 0;
513 PL_dirty = 0;
514 PL_restartop = 0;
515
516 {
517 dSP;
518 LOGOP myop;
519
520 SvREFCNT_dec (GvAV (PL_defgv));
521 GvAV (PL_defgv) = coro->args; coro->args = 0;
522
523 Zero (&myop, 1, LOGOP);
524 myop.op_next = Nullop;
525 myop.op_flags = OPf_WANT_VOID;
526
527 PUSHMARK (SP);
528 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
529 PUTBACK;
530 PL_op = (OP *)&myop;
531 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
532 SPAGAIN;
533 }
534
535 ENTER; /* necessary e.g. for dounwind */
536}
537
538static void
539free_coro_mortal ()
540{
541 if (coro_mortal)
542 {
543 SvREFCNT_dec (coro_mortal);
544 coro_mortal = 0;
545 }
546}
547
548/* inject a fake call to Coro::State::_cctx_init into the execution */
549static void NOINLINE
550prepare_cctx (coro_cctx *cctx)
551{
639 dSP; 552 dSP;
640 Coro__State ctx = (Coro__State)arg; 553 LOGOP myop;
641 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
642 554
643 coro_init_stacks (aTHX); 555 Zero (&myop, 1, LOGOP);
644 /*PL_curcop = 0;*/ 556 myop.op_next = PL_op;
645 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 557 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
646 SvREFCNT_dec (GvAV (PL_defgv));
647 GvAV (PL_defgv) = ctx->args; ctx->args = 0;
648 558
559 PUSHMARK (SP);
560 EXTEND (SP, 2);
561 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
562 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
563 PUTBACK;
564 PL_op = (OP *)&myop;
565 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
649 SPAGAIN; 566 SPAGAIN;
650
651 if (ctx->stack)
652 {
653 ctx->cursp = 0;
654
655 PUSHMARK(SP);
656 PUTBACK;
657 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
658
659 if (SvTRUE (ERRSV))
660 croak (NULL);
661 else
662 croak ("FATAL: CCTXT coroutine returned!");
663 }
664 else
665 {
666 UNOP myop;
667
668 PL_op = (OP *)&myop;
669
670 Zero(&myop, 1, UNOP);
671 myop.op_next = Nullop;
672 myop.op_flags = OPf_WANT_VOID;
673
674 PUSHMARK(SP);
675 XPUSHs (sub_init);
676 /*
677 * the next line is slightly wrong, as PL_op->op_next
678 * is actually being executed so we skip the first op.
679 * that doesn't matter, though, since it is only
680 * pp_nextstate and we never return...
681 * ah yes, and I don't care anyways ;)
682 */
683 PUTBACK;
684 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
685 SPAGAIN;
686
687 ENTER; /* necessary e.g. for dounwind */
688 }
689} 567}
690 568
691static void 569static void
692continue_coro (void *arg) 570coro_run (void *arg)
693{ 571{
572 /* coro_run is the alternative tail of transfer(), so unlock here. */
573 UNLOCK;
574
694 /* 575 /*
695 * this is a _very_ stripped down perl interpreter ;) 576 * this is a _very_ stripped down perl interpreter ;)
696 */ 577 */
697 dTHX;
698 Coro__State ctx = (Coro__State)arg;
699 JMPENV coro_start_env;
700
701 PL_top_env = &ctx->start_env; 578 PL_top_env = &PL_start_env;
702 579
703 ctx->cursp = 0; 580 /* inject call to cctx_init */
704 PL_op = PL_op->op_next; 581 prepare_cctx ((coro_cctx *)arg);
705 CALLRUNOPS(aTHX);
706 582
583 /* somebody will hit me for both perl_run and PL_restartop */
584 PL_restartop = PL_op;
585 perl_run (PL_curinterp);
586
587 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
707 abort (); 588 abort ();
708} 589}
709 590
710STATIC void 591static coro_cctx *
592cctx_new ()
593{
594 coro_cctx *cctx;
595
596 ++cctx_count;
597
598 Newz (0, cctx, 1, coro_cctx);
599
600#if HAVE_MMAP
601
602 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
603 /* mmap supposedly does allocate-on-write for us */
604 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
605
606 if (cctx->sptr == (void *)-1)
607 {
608 perror ("FATAL: unable to mmap stack for coroutine");
609 _exit (EXIT_FAILURE);
610 }
611
612# if STACKGUARD
613 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
614# endif
615
616#else
617
618 cctx->ssize = STACKSIZE * (long)sizeof (long);
619 New (0, cctx->sptr, STACKSIZE, long);
620
621 if (!cctx->sptr)
622 {
623 perror ("FATAL: unable to malloc stack for coroutine");
624 _exit (EXIT_FAILURE);
625 }
626
627#endif
628
629#if USE_VALGRIND
630 cctx->valgrind_id = VALGRIND_STACK_REGISTER (
631 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
632 cctx->ssize + (char *)cctx->sptr
633 );
634#endif
635
636 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
637
638 return cctx;
639}
640
641static void
642cctx_destroy (coro_cctx *cctx)
643{
644 if (!cctx)
645 return;
646
647 --cctx_count;
648
649#if USE_VALGRIND
650 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
651#endif
652
653#if HAVE_MMAP
654 munmap (cctx->sptr, cctx->ssize);
655#else
656 Safefree (cctx->sptr);
657#endif
658
659 Safefree (cctx);
660}
661
662static coro_cctx *
663cctx_get ()
664{
665 coro_cctx *cctx;
666
667 if (cctx_first)
668 {
669 cctx = cctx_first;
670 cctx_first = cctx->next;
671 --cctx_idle;
672 }
673 else
674 {
675 cctx = cctx_new ();
676 PL_op = PL_op->op_next;
677 }
678
679 return cctx;
680}
681
682static void
683cctx_put (coro_cctx *cctx)
684{
685 /* free another cctx if overlimit */
686 if (cctx_idle >= MAX_IDLE_CCTX)
687 {
688 coro_cctx *first = cctx_first;
689 cctx_first = first->next;
690 --cctx_idle;
691
692 assert (!first->inuse);
693 cctx_destroy (first);
694 }
695
696 ++cctx_idle;
697 cctx->next = cctx_first;
698 cctx_first = cctx;
699}
700
701/* never call directly, always through the coro_state_transfer global variable */
702static void NOINLINE
711transfer (pTHX_ struct coro *prev, struct coro *next, int flags) 703transfer (struct coro *prev, struct coro *next)
712{ 704{
713 dSTACKLEVEL; 705 dSTACKLEVEL;
714 706
707 /* sometimes transfer is only called to set idle_sp */
708 if (!next)
709 {
710 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
711 assert (((coro_cctx *)prev)->top_env = PL_top_env); /* just for the side effetc when assert is enabled */
712 }
715 if (prev != next) 713 else if (prev != next)
716 { 714 {
717 if (next->mainstack) 715 coro_cctx *prev__cctx;
716
717 if (prev->flags & CF_NEW)
718 { 718 {
719 LOCK; 719 /* create a new empty context */
720 SAVE (prev, flags); 720 Newz (0, prev->cctx, 1, coro_cctx);
721 LOAD (next); 721 prev->cctx->inuse = 1;
722 UNLOCK; 722 prev->flags &= ~CF_NEW;
723 723 prev->flags |= CF_RUNNING;
724 /* mark this state as in-use */
725 next->mainstack = 0;
726 next->tmps_ix = -2;
727
728 /* stacklevel changed? if yes, grab the stack for us! */
729 if (flags & TRANSFER_SAVE_CCTXT)
730 {
731 if (!prev->stack)
732 allocate_stack (prev, 0);
733 else if (prev->cursp != stacklevel
734 && prev->stack->usecnt > 1)
735 {
736 prev->gencnt = ++prev->stack->gencnt;
737 prev->stack->usecnt = 1;
738 }
739
740 /* has our stack been invalidated? */
741 if (next->stack && next->stack->gencnt != next->gencnt)
742 {
743 deallocate_stack (next);
744 allocate_stack (next, 1);
745 coro_create (&(next->stack->cctx),
746 continue_coro, (void *)next,
747 next->stack->sptr, labs (next->stack->ssize));
748 }
749
750 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
751 prev->cursp = stacklevel;
752 /* don't add any code here */
753 }
754 else
755 next->cursp = stacklevel;
756 } 724 }
757 else if (next->tmps_ix == -2) 725
758 croak ("tried to transfer to running coroutine"); 726 /*TODO: must not croak here */
727 if (!prev->flags & CF_RUNNING)
728 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
729
730 if (next->flags & CF_RUNNING)
731 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
732
733 prev->flags &= ~CF_RUNNING;
734 next->flags |= CF_RUNNING;
735
736 LOCK;
737
738 if (next->flags & CF_NEW)
739 {
740 /* need to start coroutine */
741 next->flags &= ~CF_NEW;
742 /* first get rid of the old state */
743 save_perl (prev);
744 /* setup coroutine call */
745 setup_coro (next);
746 /* need a new stack */
747 assert (!next->cctx);
748 }
759 else 749 else
760 { 750 {
761 LOCK; 751 /* coroutine already started */
762 SAVE (prev, -1); /* first get rid of the old state */ 752 save_perl (prev);
763 UNLOCK; 753 load_perl (next);
764
765 if (flags & TRANSFER_SAVE_CCTXT)
766 {
767 if (!prev->stack)
768 allocate_stack (prev, 0);
769
770 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
771 {
772 PL_top_env = &next->start_env;
773
774 setup_coro (next);
775 next->cursp = stacklevel;
776
777 prev->stack->refcnt++;
778 prev->stack->usecnt++;
779 next->stack = prev->stack;
780 next->gencnt = prev->gencnt;
781 }
782 else
783 {
784 assert (!next->stack);
785 allocate_stack (next, 1);
786 coro_create (&(next->stack->cctx),
787 setup_coro, (void *)next,
788 next->stack->sptr, labs (next->stack->ssize));
789 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
790 prev->cursp = stacklevel;
791 /* don't add any code here */
792 }
793 }
794 else
795 {
796 setup_coro (next);
797 next->cursp = stacklevel;
798 }
799 } 754 }
755
756 prev__cctx = prev->cctx;
757
758 /* possibly "free" the cctx */
759 if (prev__cctx->idle_sp == STACKLEVEL)
760 {
761 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
762 assert (PL_top_env == prev__cctx->top_env);
763
764 prev->cctx = 0;
765
766 cctx_put (prev__cctx);
767 prev__cctx->inuse = 0;
768 }
769
770 if (!next->cctx)
771 {
772 next->cctx = cctx_get ();
773 assert (!next->cctx->inuse);
774 next->cctx->inuse = 1;
775 }
776
777 if (prev__cctx != next->cctx)
778 {
779 prev__cctx->top_env = PL_top_env;
780 PL_top_env = next->cctx->top_env;
781 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
782 }
783
784 free_coro_mortal ();
785
786 UNLOCK;
800 } 787 }
788}
801 789
802 LOCK; 790struct transfer_args
803 if (coro_mortal) 791{
792 struct coro *prev, *next;
793};
794
795#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
796
797static void
798coro_state_destroy (struct coro *coro)
799{
800 if (coro->refcnt--)
801 return;
802
803 if (coro->mainstack && coro->mainstack != main_mainstack)
804 { 804 {
805 SvREFCNT_dec (coro_mortal); 805 struct coro temp;
806 Zero (&temp, 1, struct coro);
807 temp.save = CORO_SAVE_ALL;
808
809 if (coro->flags & CF_RUNNING)
810 croak ("FATAL: tried to destroy currently running coroutine");
811
812 save_perl (&temp);
813 load_perl (coro);
814
815 coro_destroy_stacks ();
816
817 load_perl (&temp); /* this will get rid of defsv etc.. */
818
806 coro_mortal = 0; 819 coro->mainstack = 0;
807 } 820 }
808 UNLOCK;
809}
810 821
811#define SV_CORO(sv,func) \ 822 cctx_destroy (coro->cctx);
812 do { \ 823 SvREFCNT_dec (coro->args);
813 if (SvROK (sv)) \ 824 Safefree (coro);
814 sv = SvRV (sv); \ 825}
815 \
816 if (SvTYPE (sv) == SVt_PVHV) \
817 { \
818 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
819 \
820 if (!he) \
821 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
822 \
823 (sv) = SvRV (HeVAL(he)); \
824 } \
825 \
826 /* must also be changed inside Coro::Cont::yield */ \
827 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
828 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
829 \
830 } while(0)
831 826
832#define SvSTATE(sv) (struct coro *)SvIV (sv)
833
834static void 827static int
828coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
829{
830 struct coro *coro = (struct coro *)mg->mg_ptr;
831 mg->mg_ptr = 0;
832
833 coro_state_destroy (coro);
834
835 return 0;
836}
837
838static int
839coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
840{
841 struct coro *coro = (struct coro *)mg->mg_ptr;
842
843 ++coro->refcnt;
844
845 return 0;
846}
847
848static MGVTBL coro_state_vtbl = {
849 0, 0, 0, 0,
850 coro_state_clear,
851 0,
852#ifdef MGf_DUP
853 coro_state_dup,
854#else
855# define MGf_DUP 0
856#endif
857};
858
859static struct coro *
860SvSTATE (SV *coro)
861{
862 HV *stash;
863 MAGIC *mg;
864
865 if (SvROK (coro))
866 coro = SvRV (coro);
867
868 stash = SvSTASH (coro);
869 if (stash != coro_stash && stash != coro_state_stash)
870 {
871 /* very slow, but rare, check */
872 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
873 croak ("Coro::State object required");
874 }
875
876 mg = SvMAGIC (coro);
877 assert (mg->mg_type == PERL_MAGIC_ext);
878 return (struct coro *)mg->mg_ptr;
879}
880
881static void
882prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
883{
884 ta->prev = SvSTATE (prev_sv);
885 ta->next = SvSTATE (next_sv);
886}
887
888static void
835api_transfer(pTHX_ SV *prev, SV *next, int flags) 889api_transfer (SV *prev_sv, SV *next_sv)
836{ 890{
837 SV_CORO (prev, "Coro::transfer"); 891 struct transfer_args ta;
838 SV_CORO (next, "Coro::transfer");
839 892
840 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 893 prepare_transfer (&ta, prev_sv, next_sv);
894 TRANSFER (ta);
895}
896
897static int
898api_save (SV *coro_sv, int new_save)
899{
900 struct coro *coro = SvSTATE (coro_sv);
901 int old_save = coro->save;
902
903 if (new_save >= 0)
904 coro->save = new_save;
905
906 return old_save;
841} 907}
842 908
843/** Coro ********************************************************************/ 909/** Coro ********************************************************************/
844 910
845#define PRIO_MAX 3 911#define PRIO_MAX 3
… …
848#define PRIO_LOW -1 914#define PRIO_LOW -1
849#define PRIO_IDLE -3 915#define PRIO_IDLE -3
850#define PRIO_MIN -4 916#define PRIO_MIN -4
851 917
852/* for Coro.pm */ 918/* for Coro.pm */
853static GV *coro_current, *coro_idle; 919static SV *coro_current;
854static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 920static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
855static int coro_nready; 921static int coro_nready;
856 922
857static void 923static void
858coro_enq (pTHX_ SV *sv) 924coro_enq (SV *coro_sv)
859{ 925{
860 if (SvTYPE (sv) == SVt_PVHV)
861 {
862 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
863 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
864
865 prio = prio > PRIO_MAX ? PRIO_MAX
866 : prio < PRIO_MIN ? PRIO_MIN
867 : prio;
868
869 av_push (coro_ready [prio - PRIO_MIN], sv); 926 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
870 coro_nready++; 927 coro_nready++;
871
872 return;
873 }
874
875 croak ("Coro::ready tried to enqueue something that is not a coroutine");
876} 928}
877 929
878static SV * 930static SV *
879coro_deq (pTHX_ int min_prio) 931coro_deq (int min_prio)
880{ 932{
881 int prio = PRIO_MAX - PRIO_MIN; 933 int prio = PRIO_MAX - PRIO_MIN;
882 934
883 min_prio -= PRIO_MIN; 935 min_prio -= PRIO_MIN;
884 if (min_prio < 0) 936 if (min_prio < 0)
885 min_prio = 0; 937 min_prio = 0;
886 938
887 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 939 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
888 if (av_len (coro_ready[prio]) >= 0) 940 if (AvFILLp (coro_ready [prio]) >= 0)
889 { 941 {
890 coro_nready--; 942 coro_nready--;
891 return av_shift (coro_ready[prio]); 943 return av_shift (coro_ready [prio]);
892 } 944 }
893 945
894 return 0; 946 return 0;
895} 947}
896 948
897static void 949static int
898api_ready (SV *coro) 950api_ready (SV *coro_sv)
899{ 951{
900 dTHX; 952 struct coro *coro;
901 953
902 if (SvROK (coro)) 954 if (SvROK (coro_sv))
903 coro = SvRV (coro); 955 coro_sv = SvRV (coro_sv);
956
957 coro = SvSTATE (coro_sv);
958
959 if (coro->flags & CF_READY)
960 return 0;
961
962 coro->flags |= CF_READY;
904 963
905 LOCK; 964 LOCK;
906 coro_enq (aTHX_ SvREFCNT_inc (coro)); 965 coro_enq (SvREFCNT_inc (coro_sv));
907 UNLOCK; 966 UNLOCK;
967
968 return 1;
969}
970
971static int
972api_is_ready (SV *coro_sv)
973{
974 return !!(SvSTATE (coro_sv)->flags & CF_READY);
975}
976
977static void
978prepare_schedule (struct transfer_args *ta)
979{
980 SV *prev, *next;
981
982 for (;;)
983 {
984 LOCK;
985 next = coro_deq (PRIO_MIN);
986 UNLOCK;
987
988 if (next)
989 break;
990
991 {
992 dSP;
993
994 ENTER;
995 SAVETMPS;
996
997 PUSHMARK (SP);
998 PUTBACK;
999 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1000
1001 FREETMPS;
1002 LEAVE;
1003 }
1004 }
1005
1006 prev = SvRV (coro_current);
1007 SvRV_set (coro_current, next);
1008
1009 /* free this only after the transfer */
1010 LOCK;
1011 free_coro_mortal ();
1012 UNLOCK;
1013 coro_mortal = prev;
1014
1015 assert (!SvROK(prev));//D
1016 assert (!SvROK(next));//D
1017
1018 ta->prev = SvSTATE (prev);
1019 ta->next = SvSTATE (next);
1020
1021 assert (ta->next->flags & CF_READY);
1022 ta->next->flags &= ~CF_READY;
1023}
1024
1025static void
1026prepare_cede (struct transfer_args *ta)
1027{
1028 api_ready (coro_current);
1029
1030 prepare_schedule (ta);
908} 1031}
909 1032
910static void 1033static void
911api_schedule (void) 1034api_schedule (void)
912{ 1035{
913 dTHX; 1036 struct transfer_args ta;
914 1037
915 SV *prev, *next; 1038 prepare_schedule (&ta);
916 1039 TRANSFER (ta);
917 LOCK;
918
919 prev = SvRV (GvSV (coro_current));
920 next = coro_deq (aTHX_ PRIO_MIN);
921
922 if (!next)
923 next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
924
925 /* free this only after the transfer */
926 coro_mortal = prev;
927 SV_CORO (prev, "Coro::schedule");
928
929 SvRV (GvSV (coro_current)) = next;
930
931 SV_CORO (next, "Coro::schedule");
932
933 UNLOCK;
934
935 transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
936 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
937} 1040}
938 1041
939static void 1042static void
940api_cede (void) 1043api_cede (void)
941{ 1044{
942 dTHX; 1045 struct transfer_args ta;
943 1046
944 LOCK; 1047 prepare_cede (&ta);
945 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current)))); 1048 TRANSFER (ta);
946 UNLOCK;
947
948 api_schedule ();
949} 1049}
950 1050
951MODULE = Coro::State PACKAGE = Coro::State 1051MODULE = Coro::State PACKAGE = Coro::State
952 1052
953PROTOTYPES: ENABLE 1053PROTOTYPES: DISABLE
954 1054
955BOOT: 1055BOOT:
956{ /* {} necessary for stoopid perl-5.6.x */ 1056{
957#ifdef USE_ITHREADS 1057#ifdef USE_ITHREADS
958 MUTEX_INIT (&coro_mutex); 1058 MUTEX_INIT (&coro_mutex);
959#endif 1059#endif
1060 BOOT_PAGESIZE;
960 1061
961 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
962 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
963 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1062 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
964 1063
965 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1064 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
966 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1065 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
967 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1066 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1067 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
968 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1068 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
969 1069
970 main_mainstack = PL_mainstack; 1070 main_mainstack = PL_mainstack;
971 1071
972 coroapi.ver = CORO_API_VERSION; 1072 coroapi.ver = CORO_API_VERSION;
973 coroapi.transfer = api_transfer; 1073 coroapi.transfer = api_transfer;
974}
975 1074
976Coro::State 1075 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
977_newprocess(args) 1076}
978 SV * args 1077
979 PROTOTYPE: $ 1078SV *
1079new (char *klass, ...)
980 CODE: 1080 CODE:
981 Coro__State coro; 1081{
1082 struct coro *coro;
1083 HV *hv;
1084 int i;
982 1085
983 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
984 croak ("Coro::State::_newprocess expects an arrayref");
985
986 Newz (0, coro, 1, struct coro); 1086 Newz (0, coro, 1, struct coro);
1087 coro->args = newAV ();
1088 coro->save = CORO_SAVE_ALL;
1089 coro->flags = CF_NEW;
987 1090
988 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1091 hv = newHV ();
989 /*coro->mainstack = 0; *//*actual work is done inside transfer */ 1092 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
990 /*coro->stack = 0;*/ 1093 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
991 1094
992 /* same as JMPENV_BOOTSTRAP */ 1095 for (i = 1; i < items; i++)
993 /* we might be able to recycle start_env, but safe is safe */ 1096 av_push (coro->args, newSVsv (ST (i)));
994 /*Zero(&coro->start_env, 1, JMPENV);*/ 1097}
995 coro->start_env.je_ret = -1;
996 coro->start_env.je_mustcatch = TRUE;
997
998 RETVAL = coro;
999 OUTPUT: 1098 OUTPUT:
1000 RETVAL 1099 RETVAL
1001 1100
1101int
1102save (SV *coro, int new_save = -1)
1103 CODE:
1104 RETVAL = api_save (coro, new_save);
1105 OUTPUT:
1106 RETVAL
1107
1002void 1108void
1003transfer(prev, next, flags) 1109_set_stacklevel (...)
1004 SV *prev 1110 ALIAS:
1005 SV *next 1111 Coro::State::transfer = 1
1006 int flags 1112 Coro::schedule = 2
1007 PROTOTYPE: @ 1113 Coro::cede = 3
1008 CODE: 1114 CODE:
1009 PUTBACK; 1115{
1010 SV_CORO (next, "Coro::transfer"); 1116 struct transfer_args ta;
1011 SV_CORO (prev, "Coro::transfer"); 1117
1012 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1118 switch (ix)
1013 SPAGAIN; 1119 {
1120 case 0:
1121 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1122 ta.next = 0;
1123 break;
1124
1125 case 1:
1126 if (items != 2)
1127 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1128
1129 prepare_transfer (&ta, ST (0), ST (1));
1130 break;
1131
1132 case 2:
1133 prepare_schedule (&ta);
1134 break;
1135
1136 case 3:
1137 prepare_cede (&ta);
1138 break;
1139 }
1140
1141 TRANSFER (ta);
1142}
1014 1143
1015void 1144void
1016DESTROY(coro) 1145_clone_state_from (SV *dst, SV *src)
1017 Coro::State coro 1146 CODE:
1018 CODE: 1147{
1148 struct coro *coro_src = SvSTATE (src);
1019 1149
1020 if (coro->mainstack && coro->mainstack != main_mainstack) 1150 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1021 {
1022 struct coro temp;
1023 1151
1024 PUTBACK; 1152 ++coro_src->refcnt;
1025 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL); 1153 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1026 LOAD (aTHX_ coro); 1154}
1027 SPAGAIN;
1028
1029 destroy_stacks (aTHX);
1030
1031 LOAD ((&temp)); /* this will get rid of defsv etc.. */
1032 SPAGAIN;
1033
1034 coro->mainstack = 0;
1035 }
1036
1037 deallocate_stack (coro);
1038 SvREFCNT_dec (coro->args);
1039 Safefree (coro);
1040 1155
1041void 1156void
1042_exit(code) 1157_exit (code)
1043 int code 1158 int code
1044 PROTOTYPE: $ 1159 PROTOTYPE: $
1045 CODE: 1160 CODE:
1046 _exit (code); 1161 _exit (code);
1047 1162
1048MODULE = Coro::State PACKAGE = Coro::Cont 1163int
1164cctx_count ()
1165 CODE:
1166 RETVAL = cctx_count;
1167 OUTPUT:
1168 RETVAL
1049 1169
1050# this is slightly dirty (should expose a c-level api) 1170int
1051 1171cctx_idle ()
1052void 1172 CODE:
1053yield(...) 1173 RETVAL = cctx_idle;
1054 PROTOTYPE: @ 1174 OUTPUT:
1055 CODE: 1175 RETVAL
1056 static SV *returnstk;
1057 SV *sv;
1058 AV *defav = GvAV (PL_defgv);
1059 struct coro *prev, *next;
1060
1061 if (!returnstk)
1062 returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1063
1064 /* set up @_ -- ugly */
1065 av_clear (defav);
1066 av_fill (defav, items - 1);
1067 while (items--)
1068 av_store (defav, items, SvREFCNT_inc (ST(items)));
1069
1070 SvGETMAGIC (returnstk); /* isn't documentation wrong for mg_get? */
1071 sv = av_pop ((AV *)SvRV (returnstk));
1072 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1073 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1074 SvREFCNT_dec (sv);
1075
1076 transfer (aTHX_ prev, next, 0);
1077 1176
1078MODULE = Coro::State PACKAGE = Coro 1177MODULE = Coro::State PACKAGE = Coro
1079 1178
1080# this is slightly dirty (should expose a c-level api)
1081
1082BOOT: 1179BOOT:
1083{ 1180{
1084 int i; 1181 int i;
1182
1085 HV *stash = gv_stashpv ("Coro", TRUE); 1183 coro_stash = gv_stashpv ("Coro", TRUE);
1086 1184
1087 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1185 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1088 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1186 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1089 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1187 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1090 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1188 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1091 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1189 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1092 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1190 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1093 1191
1094 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV); 1192 coro_current = get_sv ("Coro::current", FALSE);
1095 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV); 1193 SvREADONLY_on (coro_current);
1096 1194
1097 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1195 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1098 coro_ready[i] = newAV (); 1196 coro_ready[i] = newAV ();
1099 1197
1100 { 1198 {
1101 SV *sv = perl_get_sv("Coro::API", 1); 1199 SV *sv = perl_get_sv("Coro::API", 1);
1102 1200
1103 coroapi.schedule = api_schedule; 1201 coroapi.schedule = api_schedule;
1202 coroapi.save = api_save;
1104 coroapi.cede = api_cede; 1203 coroapi.cede = api_cede;
1105 coroapi.ready = api_ready; 1204 coroapi.ready = api_ready;
1205 coroapi.is_ready = api_is_ready;
1106 coroapi.nready = &coro_nready; 1206 coroapi.nready = &coro_nready;
1107 coroapi.current = coro_current; 1207 coroapi.current = coro_current;
1108 1208
1109 GCoroAPI = &coroapi; 1209 GCoroAPI = &coroapi;
1110 sv_setiv(sv, (IV)&coroapi); 1210 sv_setiv (sv, (IV)&coroapi);
1111 SvREADONLY_on(sv); 1211 SvREADONLY_on (sv);
1112 } 1212 }
1113} 1213}
1114 1214
1115#if !PERL_MICRO
1116
1117void 1215void
1118ready(self) 1216_set_current (SV *current)
1119 SV * self
1120 PROTOTYPE: $ 1217 PROTOTYPE: $
1121 CODE: 1218 CODE:
1122 api_ready (self); 1219 SvREFCNT_dec (SvRV (coro_current));
1123 1220 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1124#endif
1125 1221
1126int 1222int
1223prio (Coro::State coro, int newprio = 0)
1224 ALIAS:
1225 nice = 1
1226 CODE:
1227{
1228 RETVAL = coro->prio;
1229
1230 if (items > 1)
1231 {
1232 if (ix)
1233 newprio = coro->prio - newprio;
1234
1235 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1236 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1237
1238 coro->prio = newprio;
1239 }
1240}
1241 OUTPUT:
1242 RETVAL
1243
1244SV *
1245ready (SV *self)
1246 PROTOTYPE: $
1247 CODE:
1248 RETVAL = boolSV (api_ready (self));
1249 OUTPUT:
1250 RETVAL
1251
1252SV *
1253is_ready (SV *self)
1254 PROTOTYPE: $
1255 CODE:
1256 RETVAL = boolSV (api_is_ready (self));
1257 OUTPUT:
1258 RETVAL
1259
1260int
1127nready(...) 1261nready (...)
1128 PROTOTYPE: 1262 PROTOTYPE:
1129 CODE: 1263 CODE:
1130 RETVAL = coro_nready; 1264 RETVAL = coro_nready;
1131 OUTPUT: 1265 OUTPUT:
1132 RETVAL 1266 RETVAL
1133 1267
1268MODULE = Coro::State PACKAGE = Coro::AIO
1269
1270SV *
1271_get_state ()
1272 CODE:
1273{
1274 struct io_state *data;
1275
1276 RETVAL = newSV (sizeof (struct io_state));
1277 data = (struct io_state *)SvPVX (RETVAL);
1278 SvCUR_set (RETVAL, sizeof (struct io_state));
1279 SvPOK_only (RETVAL);
1280
1281 data->errorno = errno;
1282 data->laststype = PL_laststype;
1283 data->laststatval = PL_laststatval;
1284 data->statcache = PL_statcache;
1285}
1286 OUTPUT:
1287 RETVAL
1288
1134void 1289void
1135schedule(...) 1290_set_state (char *data_)
1136 PROTOTYPE: 1291 PROTOTYPE: $
1137 CODE: 1292 CODE:
1138 api_schedule (); 1293{
1294 struct io_state *data = (void *)data_;
1139 1295
1140void 1296 errno = data->errorno;
1141cede(...) 1297 PL_laststype = data->laststype;
1142 PROTOTYPE: 1298 PL_laststatval = data->laststatval;
1143 CODE: 1299 PL_statcache = data->statcache;
1144 api_cede (); 1300}
1145 1301

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