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Comparing Coro/Coro/State.xs (file contents):
Revision 1.67 by root, Mon Dec 12 20:07:44 2005 UTC vs.
Revision 1.120 by root, Sat Dec 2 18:01:30 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// threaded perls might need much more, 65536 or more, 9#if USE_VALGRIND
12// which is 0.5 to 1MB 10# include <valgrind/valgrind.h>
13#define STACKSIZE 16384 11#endif
14 12
15#if PERL_VERSION < 6 13/* the maximum number of idle cctx that will be pooled */
14#define MAX_IDLE_CCTX 8
15
16#define PERL_VERSION_ATLEAST(a,b,c) \
17 (PERL_REVISION > (a) \
18 || (PERL_REVISION == (a) \
19 && (PERL_VERSION > (b) \
20 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
21
22#if !PERL_VERSION_ATLEAST (5,6,0)
16# ifndef PL_ppaddr 23# ifndef PL_ppaddr
17# define PL_ppaddr ppaddr 24# define PL_ppaddr ppaddr
18# endif 25# endif
19# ifndef call_sv 26# ifndef call_sv
20# define call_sv perl_call_sv 27# define call_sv perl_call_sv
… …
31# ifndef IS_PADCONST 38# ifndef IS_PADCONST
32# define IS_PADCONST(v) 0 39# define IS_PADCONST(v) 0
33# endif 40# endif
34#endif 41#endif
35 42
36#include <signal.h> 43#include <stdio.h>
44#include <errno.h>
45
46#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
47# undef STACKGUARD
48#endif
49
50#ifndef STACKGUARD
51# define STACKGUARD 0
52#endif
37 53
38#ifdef HAVE_MMAP 54#ifdef HAVE_MMAP
39# include <unistd.h> 55# include <unistd.h>
40# include <sys/mman.h> 56# include <sys/mman.h>
41# ifndef MAP_ANONYMOUS 57# ifndef MAP_ANONYMOUS
… …
43# define MAP_ANONYMOUS MAP_ANON 59# define MAP_ANONYMOUS MAP_ANON
44# else 60# else
45# undef HAVE_MMAP 61# undef HAVE_MMAP
46# endif 62# endif
47# endif 63# endif
64# include <limits.h>
65# ifndef PAGESIZE
66# define PAGESIZE pagesize
67# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
68static long pagesize;
69# else
70# define BOOT_PAGESIZE (void)0
48#endif 71# endif
49 72#else
50#define SUB_INIT "Coro::State::initialize" 73# define PAGESIZE 0
51#define UCORO_STATE "_coro_state" 74# define BOOT_PAGESIZE (void)0
75#endif
52 76
53/* The next macro should declare a variable stacklevel that contains and approximation 77/* The next macro should declare a variable stacklevel that contains and approximation
54 * to the current C stack pointer. Its property is that it changes with each call 78 * to the current C stack pointer. Its property is that it changes with each call
55 * and should be unique. */ 79 * and should be unique. */
80#define dSTACKLEVEL int stacklevel
56#define dSTACKLEVEL void *stacklevel = &stacklevel 81#define STACKLEVEL ((void *)&stacklevel)
57 82
58#define IN_DESTRUCT (PL_main_cv == Nullcv) 83#define IN_DESTRUCT (PL_main_cv == Nullcv)
59 84
60#define labs(l) ((l) >= 0 ? (l) : -(l)) 85#if __GNUC__ >= 3
86# define attribute(x) __attribute__(x)
87#else
88# define attribute(x)
89#endif
90
91#define NOINLINE attribute ((noinline))
61 92
62#include "CoroAPI.h" 93#include "CoroAPI.h"
94
95#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
63 96
64#ifdef USE_ITHREADS 97#ifdef USE_ITHREADS
65static perl_mutex coro_mutex; 98static perl_mutex coro_mutex;
66# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 99# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
67# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 100# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
68#else 101#else
69# define LOCK 0 102# define LOCK (void)0
70# define UNLOCK 0 103# define UNLOCK (void)0
71#endif 104#endif
105
106struct io_state
107{
108 int errorno;
109 I32 laststype;
110 int laststatval;
111 Stat_t statcache;
112};
72 113
73static struct CoroAPI coroapi; 114static struct CoroAPI coroapi;
74static AV *main_mainstack; /* used to differentiate between $main and others */ 115static AV *main_mainstack; /* used to differentiate between $main and others */
75static HV *coro_state_stash; 116static HV *coro_state_stash, *coro_stash;
76static SV *ucoro_state_sv;
77static U32 ucoro_state_hash;
78static SV *coro_mortal; /* will be freed after next transfer */ 117static SV *coro_mortal; /* will be freed after next transfer */
79 118
80/* this is actually not only the c stack but also c registers etc... */ 119static struct coro_cctx *cctx_first;
120static int cctx_count, cctx_idle;
121
122/* this is a structure representing a c-level coroutine */
81typedef struct { 123typedef struct coro_cctx {
82 int refcnt; /* pointer reference counter */ 124 struct coro_cctx *next;
83 int usecnt; /* shared by how many coroutines */
84 int gencnt; /* generation counter */
85 125
86 coro_context cctx; 126 /* the stack */
87
88 void *sptr; 127 void *sptr;
89 long ssize; /* positive == mmap, otherwise malloc */ 128 long ssize; /* positive == mmap, otherwise malloc */
90} coro_stack;
91 129
130 /* cpu state */
131 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
132 JMPENV *top_env;
133 coro_context cctx;
134
135 int inuse;
136
137#if USE_VALGRIND
138 int valgrind_id;
139#endif
140} coro_cctx;
141
142enum {
143 CF_RUNNING = 0x0001, /* coroutine is running */
144 CF_READY = 0x0002, /* coroutine is ready */
145 CF_NEW = 0x0004, /* ahs never been switched to */
146};
147
148/* this is a structure representing a perl-level coroutine */
92struct coro { 149struct coro {
93 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 150 /* the c coroutine allocated to this perl coroutine, if any */
94 JMPENV start_env; 151 coro_cctx *cctx;
95 152
96 /* the optional C context */ 153 /* data associated with this coroutine (initial args) */
97 coro_stack *stack; 154 AV *args;
98 void *cursp;
99 int gencnt; 155 int refcnt;
156 int flags;
100 157
101 /* optionally saved, might be zero */ 158 /* optionally saved, might be zero */
102 AV *defav; 159 AV *defav;
103 SV *defsv; 160 SV *defsv;
104 SV *errsv; 161 SV *errsv;
105 162
106 /* saved global state not related to stacks */ 163#define VAR(name,type) type name;
107 U8 dowarn; 164# include "state.h"
108 I32 in_eval; 165#undef VAR
109 166
110 /* the stacks and related info (callchain etc..) */ 167 /* coro process data */
111 PERL_SI *curstackinfo; 168 int prio;
112 AV *curstack;
113 AV *mainstack;
114 SV **stack_sp;
115 OP *op;
116 SV **curpad;
117 AV *comppad;
118 CV *compcv;
119 SV **stack_base;
120 SV **stack_max;
121 SV **tmps_stack;
122 I32 tmps_floor;
123 I32 tmps_ix;
124 I32 tmps_max;
125 I32 *markstack;
126 I32 *markstack_ptr;
127 I32 *markstack_max;
128 I32 *scopestack;
129 I32 scopestack_ix;
130 I32 scopestack_max;
131 ANY *savestack;
132 I32 savestack_ix;
133 I32 savestack_max;
134 OP **retstack;
135 I32 retstack_ix;
136 I32 retstack_max;
137 PMOP *curpm;
138 COP *curcop;
139 JMPENV *top_env;
140
141 /* data associated with this coroutine (initial args) */
142 AV *args;
143}; 169};
144 170
145typedef struct coro *Coro__State; 171typedef struct coro *Coro__State;
146typedef struct coro *Coro__State_or_hashref; 172typedef struct coro *Coro__State_or_hashref;
147 173
148/* mostly copied from op.c:cv_clone2 */ 174static AV *
149STATIC AV * 175coro_clone_padlist (CV *cv)
150clone_padlist (pTHX_ AV *protopadlist)
151{ 176{
152 AV *av; 177 AV *padlist = CvPADLIST (cv);
153 I32 ix;
154 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
155 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
156 SV **pname = AvARRAY (protopad_name);
157 SV **ppad = AvARRAY (protopad);
158 I32 fname = AvFILLp (protopad_name);
159 I32 fpad = AvFILLp (protopad);
160 AV *newpadlist, *newpad_name, *newpad; 178 AV *newpadlist, *newpad;
161 SV **npad;
162
163 newpad_name = newAV ();
164 for (ix = fname; ix >= 0; ix--)
165 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
166
167 newpad = newAV ();
168 av_fill (newpad, AvFILLp (protopad));
169 npad = AvARRAY (newpad);
170 179
171 newpadlist = newAV (); 180 newpadlist = newAV ();
172 AvREAL_off (newpadlist); 181 AvREAL_off (newpadlist);
173 av_store (newpadlist, 0, (SV *) newpad_name); 182#if PERL_VERSION_ATLEAST (5,9,0)
183 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
184#else
185 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
186#endif
187 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
188 --AvFILLp (padlist);
189
190 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
174 av_store (newpadlist, 1, (SV *) newpad); 191 av_store (newpadlist, 1, (SV *)newpad);
175
176 av = newAV (); /* will be @_ */
177 av_extend (av, 0);
178 av_store (newpad, 0, (SV *) av);
179 AvFLAGS (av) = AVf_REIFY;
180
181 for (ix = fpad; ix > 0; ix--)
182 {
183 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
184
185 if (namesv && namesv != &PL_sv_undef)
186 {
187 char *name = SvPVX (namesv); /* XXX */
188
189 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
190 { /* lexical from outside? */
191 npad[ix] = SvREFCNT_inc (ppad[ix]);
192 }
193 else
194 { /* our own lexical */
195 SV *sv;
196 if (*name == '&')
197 sv = SvREFCNT_inc (ppad[ix]);
198 else if (*name == '@')
199 sv = (SV *) newAV ();
200 else if (*name == '%')
201 sv = (SV *) newHV ();
202 else
203 sv = NEWSV (0, 0);
204
205#ifdef SvPADBUSY
206 if (!SvPADBUSY (sv))
207#endif
208 SvPADMY_on (sv);
209
210 npad[ix] = sv;
211 }
212 }
213 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
214 {
215 npad[ix] = SvREFCNT_inc (ppad[ix]);
216 }
217 else
218 {
219 SV *sv = NEWSV (0, 0);
220 SvPADTMP_on (sv);
221 npad[ix] = sv;
222 }
223 }
224
225#if 0 /* return -ENOTUNDERSTOOD */
226 /* Now that vars are all in place, clone nested closures. */
227
228 for (ix = fpad; ix > 0; ix--) {
229 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
230 if (namesv
231 && namesv != &PL_sv_undef
232 && !(SvFLAGS(namesv) & SVf_FAKE)
233 && *SvPVX(namesv) == '&'
234 && CvCLONE(ppad[ix]))
235 {
236 CV *kid = cv_clone((CV*)ppad[ix]);
237 SvREFCNT_dec(ppad[ix]);
238 CvCLONE_on(kid);
239 SvPADMY_on(kid);
240 npad[ix] = (SV*)kid;
241 }
242 }
243#endif
244 192
245 return newpadlist; 193 return newpadlist;
246} 194}
247 195
248STATIC void 196static void
249free_padlist (pTHX_ AV *padlist) 197free_padlist (AV *padlist)
250{ 198{
251 /* may be during global destruction */ 199 /* may be during global destruction */
252 if (SvREFCNT (padlist)) 200 if (SvREFCNT (padlist))
253 { 201 {
254 I32 i = AvFILLp (padlist); 202 I32 i = AvFILLp (padlist);
… …
267 215
268 SvREFCNT_dec ((SV*)padlist); 216 SvREFCNT_dec ((SV*)padlist);
269 } 217 }
270} 218}
271 219
272STATIC int 220static int
273coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 221coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
274{ 222{
275 AV *padlist; 223 AV *padlist;
276 AV *av = (AV *)mg->mg_obj; 224 AV *av = (AV *)mg->mg_obj;
277 225
278 /* casting is fun. */ 226 /* casting is fun. */
279 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 227 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
280 free_padlist (aTHX_ padlist); 228 free_padlist (padlist);
281 229
282 SvREFCNT_dec (av); 230 SvREFCNT_dec (av);
231
232 return 0;
283} 233}
284 234
285#define PERL_MAGIC_coro PERL_MAGIC_ext 235#define PERL_MAGIC_coro PERL_MAGIC_ext
286 236
287static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 237static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
288 238
239#define CORO_MAGIC(cv) \
240 SvMAGIC (cv) \
241 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
242 ? SvMAGIC (cv) \
243 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
244 : 0
245
289/* the next two functions merely cache the padlists */ 246/* the next two functions merely cache the padlists */
290STATIC void 247static void
291get_padlist (pTHX_ CV *cv) 248get_padlist (CV *cv)
292{ 249{
293 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 250 MAGIC *mg = CORO_MAGIC (cv);
251 AV *av;
294 252
295 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 253 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
296 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 254 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
297 else 255 else
256 {
257#if 0
258 /* this is probably cleaner, but also slower? */
259 CV *cp = Perl_cv_clone (cv);
260 CvPADLIST (cv) = CvPADLIST (cp);
261 CvPADLIST (cp) = 0;
262 SvREFCNT_dec (cp);
263#else
298 CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv)); 264 CvPADLIST (cv) = coro_clone_padlist (cv);
265#endif
266 }
299} 267}
300 268
301STATIC void 269static void
302put_padlist (pTHX_ CV *cv) 270put_padlist (CV *cv)
303{ 271{
304 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 272 MAGIC *mg = CORO_MAGIC (cv);
273 AV *av;
305 274
306 if (!mg) 275 if (!mg)
307 { 276 {
308 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0); 277 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
309 mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 278 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
310 mg->mg_virtual = &vtbl_coro; 279 mg->mg_virtual = &vtbl_coro;
311 mg->mg_obj = (SV *)newAV (); 280 mg->mg_obj = (SV *)newAV ();
312 } 281 }
313 282
314 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 283 av = (AV *)mg->mg_obj;
284
285 if (AvFILLp (av) >= AvMAX (av))
286 av_extend (av, AvMAX (av) + 1);
287
288 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
315} 289}
316 290
317#define SB do { 291#define SB do {
318#define SE } while (0) 292#define SE } while (0)
319 293
320#define LOAD(state) load_state(aTHX_ (state)); 294#define LOAD(state) load_state ((state))
321#define SAVE(state,flags) save_state(aTHX_ (state),(flags)); 295#define SAVE(state,flags) save_state ((state),(flags))
322 296
323#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 297#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
324 298
325static void 299static void
326load_state(pTHX_ Coro__State c) 300load_state (Coro__State c)
327{ 301{
328 PL_dowarn = c->dowarn; 302#define VAR(name,type) PL_ ## name = c->name;
329 PL_in_eval = c->in_eval; 303# include "state.h"
330 304#undef VAR
331 PL_curstackinfo = c->curstackinfo;
332 PL_curstack = c->curstack;
333 PL_mainstack = c->mainstack;
334 PL_stack_sp = c->stack_sp;
335 PL_op = c->op;
336 PL_curpad = c->curpad;
337 PL_comppad = c->comppad;
338 PL_compcv = c->compcv;
339 PL_stack_base = c->stack_base;
340 PL_stack_max = c->stack_max;
341 PL_tmps_stack = c->tmps_stack;
342 PL_tmps_floor = c->tmps_floor;
343 PL_tmps_ix = c->tmps_ix;
344 PL_tmps_max = c->tmps_max;
345 PL_markstack = c->markstack;
346 PL_markstack_ptr = c->markstack_ptr;
347 PL_markstack_max = c->markstack_max;
348 PL_scopestack = c->scopestack;
349 PL_scopestack_ix = c->scopestack_ix;
350 PL_scopestack_max = c->scopestack_max;
351 PL_savestack = c->savestack;
352 PL_savestack_ix = c->savestack_ix;
353 PL_savestack_max = c->savestack_max;
354 PL_retstack = c->retstack;
355 PL_retstack_ix = c->retstack_ix;
356 PL_retstack_max = c->retstack_max;
357 PL_curpm = c->curpm;
358 PL_curcop = c->curcop;
359 PL_top_env = c->top_env;
360 305
361 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 306 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
362 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 307 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
363 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 308 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
364 309
… …
367 CV *cv; 312 CV *cv;
368 313
369 /* now do the ugly restore mess */ 314 /* now do the ugly restore mess */
370 while ((cv = (CV *)POPs)) 315 while ((cv = (CV *)POPs))
371 { 316 {
372 AV *padlist = (AV *)POPs;
373
374 if (padlist)
375 {
376 put_padlist (aTHX_ cv); /* mark this padlist as available */ 317 put_padlist (cv); /* mark this padlist as available */
377 CvPADLIST(cv) = padlist; 318 CvDEPTH (cv) = PTR2IV (POPs);
378 } 319 CvPADLIST (cv) = (AV *)POPs;
379
380 ++CvDEPTH(cv);
381 } 320 }
382 321
383 PUTBACK; 322 PUTBACK;
384 } 323 }
385} 324}
386 325
387static void 326static void
388save_state(pTHX_ Coro__State c, int flags) 327save_state (Coro__State c, int flags)
389{ 328{
390 { 329 {
391 dSP; 330 dSP;
392 I32 cxix = cxstack_ix; 331 I32 cxix = cxstack_ix;
393 PERL_CONTEXT *ccstk = cxstack; 332 PERL_CONTEXT *ccstk = cxstack;
… …
404 { 343 {
405 while (cxix >= 0) 344 while (cxix >= 0)
406 { 345 {
407 PERL_CONTEXT *cx = &ccstk[cxix--]; 346 PERL_CONTEXT *cx = &ccstk[cxix--];
408 347
409 if (CxTYPE(cx) == CXt_SUB) 348 if (CxTYPE (cx) == CXt_SUB)
410 { 349 {
411 CV *cv = cx->blk_sub.cv; 350 CV *cv = cx->blk_sub.cv;
351
412 if (CvDEPTH(cv)) 352 if (CvDEPTH (cv))
413 { 353 {
414 EXTEND (SP, CvDEPTH(cv)*2); 354 EXTEND (SP, 3);
415 355
416 while (--CvDEPTH(cv))
417 {
418 /* this tells the restore code to increment CvDEPTH */
419 PUSHs (Nullsv);
420 PUSHs ((SV *)cv);
421 }
422
423 PUSHs ((SV *)CvPADLIST(cv)); 356 PUSHs ((SV *)CvPADLIST (cv));
357 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
424 PUSHs ((SV *)cv); 358 PUSHs ((SV *)cv);
425 359
426 get_padlist (aTHX_ cv); /* this is a monster */ 360 CvDEPTH (cv) = 0;
361 get_padlist (cv);
427 } 362 }
428 } 363 }
429#ifdef CXt_FORMAT 364#ifdef CXt_FORMAT
430 else if (CxTYPE(cx) == CXt_FORMAT) 365 else if (CxTYPE (cx) == CXt_FORMAT)
431 { 366 {
432 /* I never used formats, so how should I know how these are implemented? */ 367 /* I never used formats, so how should I know how these are implemented? */
433 /* my bold guess is as a simple, plain sub... */ 368 /* my bold guess is as a simple, plain sub... */
434 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats"); 369 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
435 } 370 }
… …
449 384
450 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 385 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
451 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 386 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
452 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 387 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
453 388
454 c->dowarn = PL_dowarn; 389#define VAR(name,type)c->name = PL_ ## name;
455 c->in_eval = PL_in_eval; 390# include "state.h"
456 391#undef VAR
457 c->curstackinfo = PL_curstackinfo;
458 c->curstack = PL_curstack;
459 c->mainstack = PL_mainstack;
460 c->stack_sp = PL_stack_sp;
461 c->op = PL_op;
462 c->curpad = PL_curpad;
463 c->comppad = PL_comppad;
464 c->compcv = PL_compcv;
465 c->stack_base = PL_stack_base;
466 c->stack_max = PL_stack_max;
467 c->tmps_stack = PL_tmps_stack;
468 c->tmps_floor = PL_tmps_floor;
469 c->tmps_ix = PL_tmps_ix;
470 c->tmps_max = PL_tmps_max;
471 c->markstack = PL_markstack;
472 c->markstack_ptr = PL_markstack_ptr;
473 c->markstack_max = PL_markstack_max;
474 c->scopestack = PL_scopestack;
475 c->scopestack_ix = PL_scopestack_ix;
476 c->scopestack_max = PL_scopestack_max;
477 c->savestack = PL_savestack;
478 c->savestack_ix = PL_savestack_ix;
479 c->savestack_max = PL_savestack_max;
480 c->retstack = PL_retstack;
481 c->retstack_ix = PL_retstack_ix;
482 c->retstack_max = PL_retstack_max;
483 c->curpm = PL_curpm;
484 c->curcop = PL_curcop;
485 c->top_env = PL_top_env;
486} 392}
487 393
488/* 394/*
489 * allocate various perl stacks. This is an exact copy 395 * allocate various perl stacks. This is an exact copy
490 * of perl.c:init_stacks, except that it uses less memory 396 * of perl.c:init_stacks, except that it uses less memory
491 * on the (sometimes correct) assumption that coroutines do 397 * on the (sometimes correct) assumption that coroutines do
492 * not usually need a lot of stackspace. 398 * not usually need a lot of stackspace.
493 */ 399 */
494STATIC void 400static void
495coro_init_stacks (pTHX) 401coro_init_stacks ()
496{ 402{
497 LOCK;
498
499 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 403 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
500 PL_curstackinfo->si_type = PERLSI_MAIN; 404 PL_curstackinfo->si_type = PERLSI_MAIN;
501 PL_curstack = PL_curstackinfo->si_stack; 405 PL_curstack = PL_curstackinfo->si_stack;
502 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 406 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
503 407
504 PL_stack_base = AvARRAY(PL_curstack); 408 PL_stack_base = AvARRAY(PL_curstack);
505 PL_stack_sp = PL_stack_base; 409 PL_stack_sp = PL_stack_base;
506 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 410 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
507 411
508 New(50,PL_tmps_stack,96,SV*); 412 New(50,PL_tmps_stack,128,SV*);
509 PL_tmps_floor = -1; 413 PL_tmps_floor = -1;
510 PL_tmps_ix = -1; 414 PL_tmps_ix = -1;
511 PL_tmps_max = 96; 415 PL_tmps_max = 128;
512 416
513 New(54,PL_markstack,16,I32); 417 New(54,PL_markstack,32,I32);
514 PL_markstack_ptr = PL_markstack; 418 PL_markstack_ptr = PL_markstack;
515 PL_markstack_max = PL_markstack + 16; 419 PL_markstack_max = PL_markstack + 32;
516 420
517#ifdef SET_MARK_OFFSET 421#ifdef SET_MARK_OFFSET
518 SET_MARK_OFFSET; 422 SET_MARK_OFFSET;
519#endif 423#endif
520 424
521 New(54,PL_scopestack,16,I32); 425 New(54,PL_scopestack,32,I32);
522 PL_scopestack_ix = 0; 426 PL_scopestack_ix = 0;
523 PL_scopestack_max = 16; 427 PL_scopestack_max = 32;
524 428
525 New(54,PL_savestack,96,ANY); 429 New(54,PL_savestack,64,ANY);
526 PL_savestack_ix = 0; 430 PL_savestack_ix = 0;
527 PL_savestack_max = 96; 431 PL_savestack_max = 64;
528 432
433#if !PERL_VERSION_ATLEAST (5,9,0)
529 New(54,PL_retstack,8,OP*); 434 New(54,PL_retstack,16,OP*);
530 PL_retstack_ix = 0; 435 PL_retstack_ix = 0;
531 PL_retstack_max = 8; 436 PL_retstack_max = 16;
532 437#endif
533 UNLOCK;
534} 438}
535 439
536/* 440/*
537 * destroy the stacks, the callchain etc... 441 * destroy the stacks, the callchain etc...
538 */ 442 */
539STATIC void 443static void
540destroy_stacks(pTHX) 444coro_destroy_stacks ()
541{ 445{
542 if (!IN_DESTRUCT) 446 if (!IN_DESTRUCT)
543 { 447 {
544 /* is this ugly, I ask? */ 448 /* is this ugly, I ask? */
545 LEAVE_SCOPE (0); 449 LEAVE_SCOPE (0);
… …
576 480
577 Safefree (PL_tmps_stack); 481 Safefree (PL_tmps_stack);
578 Safefree (PL_markstack); 482 Safefree (PL_markstack);
579 Safefree (PL_scopestack); 483 Safefree (PL_scopestack);
580 Safefree (PL_savestack); 484 Safefree (PL_savestack);
485#if !PERL_VERSION_ATLEAST (5,9,0)
581 Safefree (PL_retstack); 486 Safefree (PL_retstack);
582}
583
584static void
585allocate_stack (Coro__State ctx, int alloc)
586{
587 coro_stack *stack;
588
589 New (0, stack, 1, coro_stack);
590
591 stack->refcnt = 1;
592 stack->usecnt = 1;
593 stack->gencnt = ctx->gencnt = 0;
594
595 if (alloc)
596 {
597#if HAVE_MMAP
598 stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
599 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
600 if (stack->sptr == (void *)-1)
601#endif 487#endif
602 {
603 /*FIXME*//*D*//* reasonable stack size! */
604 stack->ssize = - (STACKSIZE * sizeof (long));
605 New (0, stack->sptr, STACKSIZE, long);
606 }
607 }
608 else
609 stack->sptr = 0;
610
611 ctx->stack = stack;
612} 488}
613 489
614static void 490static void
615deallocate_stack (Coro__State ctx) 491setup_coro (struct coro *coro)
616{
617 coro_stack *stack = ctx->stack;
618
619 ctx->stack = 0;
620
621 if (stack)
622 {
623 if (!--stack->refcnt)
624 {
625#ifdef HAVE_MMAP
626 if (stack->ssize > 0 && stack->sptr)
627 munmap (stack->sptr, stack->ssize);
628 else
629#endif
630 Safefree (stack->sptr);
631
632 Safefree (stack);
633 }
634 else if (ctx->gencnt == stack->gencnt)
635 --stack->usecnt;
636 }
637}
638
639static void
640setup_coro (void *arg)
641{ 492{
642 /* 493 /*
643 * emulate part of the perl startup here. 494 * emulate part of the perl startup here.
644 */ 495 */
645 dTHX;
646 dSP;
647 Coro__State ctx = (Coro__State)arg;
648 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
649 496
650 coro_init_stacks (aTHX); 497 coro_init_stacks ();
651 /*PL_curcop = 0;*/ 498
652 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 499 PL_curcop = &PL_compiling;
500 PL_in_eval = EVAL_NULL;
501 PL_curpm = 0;
502 PL_localizing = 0;
503 PL_dirty = 0;
504 PL_restartop = 0;
505
506 {
507 dSP;
508 LOGOP myop;
509
653 SvREFCNT_dec (GvAV (PL_defgv)); 510 SvREFCNT_dec (GvAV (PL_defgv));
654 GvAV (PL_defgv) = ctx->args; ctx->args = 0; 511 GvAV (PL_defgv) = coro->args; coro->args = 0;
655 512
656 SPAGAIN;
657
658 if (ctx->stack)
659 {
660 ctx->cursp = 0;
661
662 PUSHMARK(SP);
663 PUTBACK;
664 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
665
666 if (SvTRUE (ERRSV))
667 croak (NULL);
668 else
669 croak ("FATAL: CCTXT coroutine returned!");
670 }
671 else
672 {
673 UNOP myop;
674
675 PL_op = (OP *)&myop;
676
677 Zero(&myop, 1, UNOP); 513 Zero (&myop, 1, LOGOP);
678 myop.op_next = Nullop; 514 myop.op_next = Nullop;
679 myop.op_flags = OPf_WANT_VOID; 515 myop.op_flags = OPf_WANT_VOID;
680 516
681 PUSHMARK(SP); 517 PUSHMARK (SP);
682 XPUSHs (sub_init); 518 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
683 /*
684 * the next line is slightly wrong, as PL_op->op_next
685 * is actually being executed so we skip the first op.
686 * that doesn't matter, though, since it is only
687 * pp_nextstate and we never return...
688 * ah yes, and I don't care anyways ;)
689 */
690 PUTBACK; 519 PUTBACK;
520 PL_op = (OP *)&myop;
691 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); 521 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
692 SPAGAIN; 522 SPAGAIN;
523 }
693 524
694 ENTER; /* necessary e.g. for dounwind */ 525 ENTER; /* necessary e.g. for dounwind */
695 }
696} 526}
697 527
698static void 528static void
699continue_coro (void *arg) 529free_coro_mortal ()
700{ 530{
701 /*
702 * this is a _very_ stripped down perl interpreter ;)
703 */
704 dTHX;
705 Coro__State ctx = (Coro__State)arg;
706 JMPENV coro_start_env;
707
708 PL_top_env = &ctx->start_env;
709
710 ctx->cursp = 0;
711 PL_op = PL_op->op_next;
712 CALLRUNOPS(aTHX);
713
714 abort ();
715}
716
717STATIC void
718transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
719{
720 dSTACKLEVEL;
721
722 if (prev != next)
723 {
724 if (next->mainstack)
725 {
726 LOCK;
727 SAVE (prev, flags);
728 LOAD (next);
729 UNLOCK;
730
731 /* mark this state as in-use */
732 next->mainstack = 0;
733 next->tmps_ix = -2;
734
735 /* stacklevel changed? if yes, grab the stack for us! */
736 if (flags & TRANSFER_SAVE_CCTXT)
737 {
738 if (!prev->stack)
739 allocate_stack (prev, 0);
740 else if (prev->cursp != stacklevel
741 && prev->stack->usecnt > 1)
742 {
743 prev->gencnt = ++prev->stack->gencnt;
744 prev->stack->usecnt = 1;
745 }
746
747 /* has our stack been invalidated? */
748 if (next->stack && next->stack->gencnt != next->gencnt)
749 {
750 deallocate_stack (next);
751 allocate_stack (next, 1);
752 coro_create (&(next->stack->cctx),
753 continue_coro, (void *)next,
754 next->stack->sptr, labs (next->stack->ssize));
755 }
756
757 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
758 prev->cursp = stacklevel;
759 /* don't add any code here */
760 }
761 else
762 next->cursp = stacklevel;
763 }
764 else if (next->tmps_ix == -2)
765 croak ("tried to transfer to running coroutine");
766 else
767 {
768 LOCK;
769 SAVE (prev, -1); /* first get rid of the old state */
770 UNLOCK;
771
772 if (flags & TRANSFER_SAVE_CCTXT)
773 {
774 if (!prev->stack)
775 allocate_stack (prev, 0);
776
777 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
778 {
779 PL_top_env = &next->start_env;
780
781 setup_coro (next);
782 next->cursp = stacklevel;
783
784 prev->stack->refcnt++;
785 prev->stack->usecnt++;
786 next->stack = prev->stack;
787 next->gencnt = prev->gencnt;
788 }
789 else
790 {
791 assert (!next->stack);
792 allocate_stack (next, 1);
793 coro_create (&(next->stack->cctx),
794 setup_coro, (void *)next,
795 next->stack->sptr, labs (next->stack->ssize));
796 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
797 prev->cursp = stacklevel;
798 /* don't add any code here */
799 }
800 }
801 else
802 {
803 setup_coro (next);
804 next->cursp = stacklevel;
805 }
806 }
807 }
808
809 LOCK;
810 if (coro_mortal) 531 if (coro_mortal)
811 { 532 {
812 SvREFCNT_dec (coro_mortal); 533 SvREFCNT_dec (coro_mortal);
813 coro_mortal = 0; 534 coro_mortal = 0;
814 } 535 }
536}
537
538/* inject a fake call to Coro::State::_cctx_init into the execution */
539static void NOINLINE
540prepare_cctx (coro_cctx *cctx)
541{
542 dSP;
543 LOGOP myop;
544
545 Zero (&myop, 1, LOGOP);
546 myop.op_next = PL_op;
547 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
548
549 PUSHMARK (SP);
550 EXTEND (SP, 2);
551 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
552 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
553 PUTBACK;
554 PL_op = (OP *)&myop;
555 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
556 SPAGAIN;
557}
558
559static void
560coro_run (void *arg)
561{
562 /* coro_run is the alternative tail of transfer(), so unlock here. */
815 UNLOCK; 563 UNLOCK;
816}
817 564
818#define SV_CORO(sv,func) \ 565 /*
819 do { \ 566 * this is a _very_ stripped down perl interpreter ;)
820 if (SvROK (sv)) \ 567 */
821 sv = SvRV (sv); \ 568 PL_top_env = &PL_start_env;
822 \
823 if (SvTYPE (sv) == SVt_PVHV) \
824 { \
825 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
826 \
827 if (!he) \
828 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
829 \
830 (sv) = SvRV (HeVAL(he)); \
831 } \
832 \
833 /* must also be changed inside Coro::Cont::yield */ \
834 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
835 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
836 \
837 } while(0)
838 569
839#define SvSTATE(sv) (struct coro *)SvIV (sv) 570 /* inject call to cctx_init */
571 prepare_cctx ((coro_cctx *)arg);
840 572
573 /* somebody will hit me for both perl_run and PL_restartop */
574 PL_restartop = PL_op;
575 perl_run (PL_curinterp);
576
577 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
578 abort ();
579}
580
581static coro_cctx *
582cctx_new ()
583{
584 coro_cctx *cctx;
585
586 ++cctx_count;
587
588 New (0, cctx, 1, coro_cctx);
589
590#if HAVE_MMAP
591
592 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
593 /* mmap supposedly does allocate-on-write for us */
594 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
595
596 if (cctx->sptr == (void *)-1)
597 {
598 perror ("FATAL: unable to mmap stack for coroutine");
599 _exit (EXIT_FAILURE);
600 }
601
602# if STACKGUARD
603 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
604# endif
605
606#else
607
608 cctx->ssize = STACKSIZE * (long)sizeof (long);
609 New (0, cctx->sptr, STACKSIZE, long);
610
611 if (!cctx->sptr)
612 {
613 perror ("FATAL: unable to malloc stack for coroutine");
614 _exit (EXIT_FAILURE);
615 }
616
617#endif
618
619#if USE_VALGRIND
620 cctx->valgrind_id = VALGRIND_STACK_REGISTER (
621 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
622 cctx->ssize + (char *)cctx->sptr
623 );
624#endif
625
626 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
627
628 return cctx;
629}
630
631static void
632cctx_destroy (coro_cctx *cctx)
633{
634 if (!cctx)
635 return;
636
637 --cctx_count;
638
639#if USE_VALGRIND
640 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
641#endif
642
643#if HAVE_MMAP
644 munmap (cctx->sptr, cctx->ssize);
645#else
646 Safefree (cctx->sptr);
647#endif
648
649 Safefree (cctx);
650}
651
652static coro_cctx *
653cctx_get ()
654{
655 coro_cctx *cctx;
656
657 if (cctx_first)
658 {
659 cctx = cctx_first;
660 cctx_first = cctx->next;
661 --cctx_idle;
662 }
663 else
664 {
665 cctx = cctx_new ();
666 PL_op = PL_op->op_next;
667 }
668
669 return cctx;
670}
671
672static void
673cctx_put (coro_cctx *cctx)
674{
675 /* free another cctx if overlimit */
676 if (cctx_idle >= MAX_IDLE_CCTX)
677 {
678 coro_cctx *first = cctx_first;
679 cctx_first = first->next;
680 --cctx_idle;
681
682 assert (!first->inuse);
683 cctx_destroy (first);
684 }
685
686 ++cctx_idle;
687 cctx->next = cctx_first;
688 cctx_first = cctx;
689}
690
691/* never call directly, always through the coro_state_transfer global variable */
692static void NOINLINE
693transfer (struct coro *prev, struct coro *next, int flags)
694{
695 dSTACKLEVEL;
696
697 /* sometimes transfer is only called to set idle_sp */
698 if (flags == TRANSFER_SET_STACKLEVEL)
699 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
700 else if (prev != next)
701 {
702 coro_cctx *prev__cctx;
703
704 if (prev->flags & CF_NEW)
705 {
706 /* create a new empty context */
707 Newz (0, prev->cctx, 1, coro_cctx);
708 prev->cctx->inuse = 1;
709 prev->flags &= ~CF_NEW;
710 prev->flags |= CF_RUNNING;
711 }
712
713 /*TODO: must not croak here */
714 if (!prev->flags & CF_RUNNING)
715 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
716
717 if (next->flags & CF_RUNNING)
718 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
719
720 prev->flags &= ~CF_RUNNING;
721 next->flags |= CF_RUNNING;
722
723 LOCK;
724
725 if (next->flags & CF_NEW)
726 {
727 /* need to start coroutine */
728 next->flags &= ~CF_NEW;
729 /* first get rid of the old state */
730 SAVE (prev, -1);
731 /* setup coroutine call */
732 setup_coro (next);
733 /* need a new stack */
734 assert (!next->stack);
735 }
736 else
737 {
738 /* coroutine already started */
739 SAVE (prev, flags);
740 LOAD (next);
741 }
742
743 prev__cctx = prev->cctx;
744
745 /* possibly "free" the cctx */
746 if (prev__cctx->idle_sp == STACKLEVEL)
747 {
748 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
749 assert (PL_top_env == prev__cctx->top_env);
750
751 prev->cctx = 0;
752
753 cctx_put (prev__cctx);
754 prev__cctx->inuse = 0;
755 }
756
757 if (!next->cctx)
758 {
759 next->cctx = cctx_get ();
760 assert (!next->cctx->inuse);
761 next->cctx->inuse = 1;
762 }
763
764 if (prev__cctx != next->cctx)
765 {
766 prev__cctx->top_env = PL_top_env;
767 PL_top_env = next->cctx->top_env;
768 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
769 }
770
771 free_coro_mortal ();
772
773 UNLOCK;
774 }
775}
776
777struct transfer_args
778{
779 struct coro *prev, *next;
780 int flags;
781};
782
783#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
784
785static void
786coro_state_destroy (struct coro *coro)
787{
788 if (coro->refcnt--)
789 return;
790
791 if (coro->mainstack && coro->mainstack != main_mainstack)
792 {
793 struct coro temp;
794
795 if (coro->flags & CF_RUNNING)
796 croak ("FATAL: tried to destroy currently running coroutine");
797
798 SAVE ((&temp), TRANSFER_SAVE_ALL);
799 LOAD (coro);
800
801 coro_destroy_stacks ();
802
803 LOAD ((&temp)); /* this will get rid of defsv etc.. */
804
805 coro->mainstack = 0;
806 }
807
808 cctx_destroy (coro->cctx);
809 SvREFCNT_dec (coro->args);
810 Safefree (coro);
811}
812
841static void 813static int
814coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
815{
816 struct coro *coro = (struct coro *)mg->mg_ptr;
817 mg->mg_ptr = 0;
818
819 coro_state_destroy (coro);
820
821 return 0;
822}
823
824static int
825coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
826{
827 struct coro *coro = (struct coro *)mg->mg_ptr;
828
829 ++coro->refcnt;
830
831 return 0;
832}
833
834static MGVTBL coro_state_vtbl = {
835 0, 0, 0, 0,
836 coro_state_clear,
837 0,
838#ifdef MGf_DUP
839 coro_state_dup,
840#else
841# define MGf_DUP 0
842#endif
843};
844
845static struct coro *
846SvSTATE (SV *coro)
847{
848 HV *stash;
849 MAGIC *mg;
850
851 if (SvROK (coro))
852 coro = SvRV (coro);
853
854 stash = SvSTASH (coro);
855 if (stash != coro_stash && stash != coro_state_stash)
856 {
857 /* very slow, but rare, check */
858 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
859 croak ("Coro::State object required");
860 }
861
862 mg = SvMAGIC (coro);
863 assert (mg->mg_type == PERL_MAGIC_ext);
864 return (struct coro *)mg->mg_ptr;
865}
866
867static void
868prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
869{
870 ta->prev = SvSTATE (prev);
871 ta->next = SvSTATE (next);
872 ta->flags = flags;
873}
874
875static void
842api_transfer(pTHX_ SV *prev, SV *next, int flags) 876api_transfer (SV *prev, SV *next, int flags)
843{ 877{
844 SV_CORO (prev, "Coro::transfer"); 878 struct transfer_args ta;
845 SV_CORO (next, "Coro::transfer");
846 879
847 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 880 prepare_transfer (&ta, prev, next, flags);
881 TRANSFER (ta);
848} 882}
849 883
850/** Coro ********************************************************************/ 884/** Coro ********************************************************************/
851 885
852#define PRIO_MAX 3 886#define PRIO_MAX 3
… …
855#define PRIO_LOW -1 889#define PRIO_LOW -1
856#define PRIO_IDLE -3 890#define PRIO_IDLE -3
857#define PRIO_MIN -4 891#define PRIO_MIN -4
858 892
859/* for Coro.pm */ 893/* for Coro.pm */
860static GV *coro_current, *coro_idle; 894static SV *coro_current;
861static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 895static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
862static int coro_nready; 896static int coro_nready;
863 897
864static void 898static void
865coro_enq (pTHX_ SV *sv) 899coro_enq (SV *coro_sv)
866{ 900{
867 if (SvTYPE (sv) == SVt_PVHV)
868 {
869 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
870 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
871
872 prio = prio > PRIO_MAX ? PRIO_MAX
873 : prio < PRIO_MIN ? PRIO_MIN
874 : prio;
875
876 av_push (coro_ready [prio - PRIO_MIN], sv); 901 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
877 coro_nready++; 902 coro_nready++;
878
879 return;
880 }
881
882 croak ("Coro::ready tried to enqueue something that is not a coroutine");
883} 903}
884 904
885static SV * 905static SV *
886coro_deq (pTHX_ int min_prio) 906coro_deq (int min_prio)
887{ 907{
888 int prio = PRIO_MAX - PRIO_MIN; 908 int prio = PRIO_MAX - PRIO_MIN;
889 909
890 min_prio -= PRIO_MIN; 910 min_prio -= PRIO_MIN;
891 if (min_prio < 0) 911 if (min_prio < 0)
892 min_prio = 0; 912 min_prio = 0;
893 913
894 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 914 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
895 if (av_len (coro_ready[prio]) >= 0) 915 if (AvFILLp (coro_ready [prio]) >= 0)
896 { 916 {
897 coro_nready--; 917 coro_nready--;
898 return av_shift (coro_ready[prio]); 918 return av_shift (coro_ready [prio]);
899 } 919 }
900 920
901 return 0; 921 return 0;
902} 922}
903 923
904static void 924static int
905api_ready (SV *coro) 925api_ready (SV *coro_sv)
906{ 926{
907 dTHX; 927 struct coro *coro;
908 928
909 if (SvROK (coro)) 929 if (SvROK (coro_sv))
910 coro = SvRV (coro); 930 coro_sv = SvRV (coro_sv);
931
932 coro = SvSTATE (coro_sv);
933
934 if (coro->flags & CF_READY)
935 return 0;
936
937#if 0 /* this is actually harmless */
938 if (coro->flags & CF_RUNNING)
939 croak ("Coro::ready called on currently running coroutine");
940#endif
941
942 coro->flags |= CF_READY;
911 943
912 LOCK; 944 LOCK;
913 coro_enq (aTHX_ SvREFCNT_inc (coro)); 945 coro_enq (SvREFCNT_inc (coro_sv));
914 UNLOCK; 946 UNLOCK;
947
948 return 1;
949}
950
951static int
952api_is_ready (SV *coro_sv)
953{
954 return !!SvSTATE (coro_sv)->flags & CF_READY;
955}
956
957static void
958prepare_schedule (struct transfer_args *ta)
959{
960 SV *prev, *next;
961
962 for (;;)
963 {
964 LOCK;
965 next = coro_deq (PRIO_MIN);
966 UNLOCK;
967
968 if (next)
969 break;
970
971 {
972 dSP;
973
974 ENTER;
975 SAVETMPS;
976
977 PUSHMARK (SP);
978 PUTBACK;
979 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
980
981 FREETMPS;
982 LEAVE;
983 }
984 }
985
986 prev = SvRV (coro_current);
987 SvRV_set (coro_current, next);
988
989 /* free this only after the transfer */
990 LOCK;
991 free_coro_mortal ();
992 UNLOCK;
993 coro_mortal = prev;
994
995 assert (!SvROK(prev));//D
996 assert (!SvROK(next));//D
997
998 ta->prev = SvSTATE (prev);
999 ta->next = SvSTATE (next);
1000 ta->flags = TRANSFER_SAVE_ALL;
1001
1002 assert (ta->flags & CF_READY);
1003 ta->next->flags &= ~CF_READY;
1004}
1005
1006static void
1007prepare_cede (struct transfer_args *ta)
1008{
1009 api_ready (coro_current);
1010
1011 prepare_schedule (ta);
915} 1012}
916 1013
917static void 1014static void
918api_schedule (void) 1015api_schedule (void)
919{ 1016{
920 dTHX; 1017 struct transfer_args ta;
921 1018
922 SV *prev, *next; 1019 prepare_schedule (&ta);
923 1020 TRANSFER (ta);
924 LOCK;
925
926 prev = SvRV (GvSV (coro_current));
927 next = coro_deq (aTHX_ PRIO_MIN);
928
929 if (!next)
930 next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
931
932 /* free this only after the transfer */
933 coro_mortal = prev;
934 SV_CORO (prev, "Coro::schedule");
935
936 SvRV (GvSV (coro_current)) = next;
937
938 SV_CORO (next, "Coro::schedule");
939
940 UNLOCK;
941
942 transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
943 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
944} 1021}
945 1022
946static void 1023static void
947api_cede (void) 1024api_cede (void)
948{ 1025{
949 dTHX; 1026 struct transfer_args ta;
950 1027
951 LOCK; 1028 prepare_cede (&ta);
952 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current)))); 1029 TRANSFER (ta);
953 UNLOCK;
954
955 api_schedule ();
956} 1030}
957 1031
958MODULE = Coro::State PACKAGE = Coro::State 1032MODULE = Coro::State PACKAGE = Coro::State
959 1033
960PROTOTYPES: ENABLE 1034PROTOTYPES: DISABLE
961 1035
962BOOT: 1036BOOT:
963{ /* {} necessary for stoopid perl-5.6.x */ 1037{
964#ifdef USE_ITHREADS 1038#ifdef USE_ITHREADS
965 MUTEX_INIT (&coro_mutex); 1039 MUTEX_INIT (&coro_mutex);
966#endif 1040#endif
1041 BOOT_PAGESIZE;
967 1042
968 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
969 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
970 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1043 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
971 1044
972 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1045 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
973 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1046 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
974 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1047 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
975 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
976 1048
977 main_mainstack = PL_mainstack; 1049 main_mainstack = PL_mainstack;
978 1050
979 coroapi.ver = CORO_API_VERSION; 1051 coroapi.ver = CORO_API_VERSION;
980 coroapi.transfer = api_transfer; 1052 coroapi.transfer = api_transfer;
981}
982 1053
983Coro::State 1054 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
984_newprocess(args) 1055}
985 SV * args 1056
986 PROTOTYPE: $ 1057SV *
1058new (char *klass, ...)
987 CODE: 1059 CODE:
988 Coro__State coro; 1060{
1061 struct coro *coro;
1062 HV *hv;
1063 int i;
989 1064
990 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
991 croak ("Coro::State::_newprocess expects an arrayref");
992
993 Newz (0, coro, 1, struct coro); 1065 Newz (0, coro, 1, struct coro);
1066 coro->args = newAV ();
1067 coro->flags = CF_NEW;
994 1068
995 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1069 hv = newHV ();
996 /*coro->mainstack = 0; *//*actual work is done inside transfer */ 1070 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
997 /*coro->stack = 0;*/ 1071 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
998 1072
999 /* same as JMPENV_BOOTSTRAP */ 1073 for (i = 1; i < items; i++)
1000 /* we might be able to recycle start_env, but safe is safe */ 1074 av_push (coro->args, newSVsv (ST (i)));
1001 /*Zero(&coro->start_env, 1, JMPENV);*/ 1075}
1002 coro->start_env.je_ret = -1;
1003 coro->start_env.je_mustcatch = TRUE;
1004
1005 RETVAL = coro;
1006 OUTPUT: 1076 OUTPUT:
1007 RETVAL 1077 RETVAL
1008 1078
1009void 1079void
1010transfer(prev, next, flags) 1080_set_stacklevel (...)
1011 SV *prev 1081 ALIAS:
1012 SV *next 1082 Coro::State::transfer = 1
1013 int flags 1083 Coro::schedule = 2
1014 PROTOTYPE: @ 1084 Coro::cede = 3
1015 CODE: 1085 CODE:
1016 PUTBACK; 1086{
1017 SV_CORO (next, "Coro::transfer"); 1087 struct transfer_args ta;
1018 SV_CORO (prev, "Coro::transfer"); 1088
1019 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1089 switch (ix)
1020 SPAGAIN; 1090 {
1091 case 0:
1092 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1093 ta.next = 0;
1094 ta.flags = TRANSFER_SET_STACKLEVEL;
1095 break;
1096
1097 case 1:
1098 if (items != 3)
1099 croak ("Coro::State::transfer (prev,next,flags) expects three arguments, not %d", items);
1100
1101 prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1102 break;
1103
1104 case 2:
1105 prepare_schedule (&ta);
1106 break;
1107
1108 case 3:
1109 prepare_cede (&ta);
1110 break;
1111 }
1112
1113 TRANSFER (ta);
1114}
1021 1115
1022void 1116void
1023DESTROY(coro) 1117_clone_state_from (SV *dst, SV *src)
1024 Coro::State coro 1118 CODE:
1025 CODE: 1119{
1120 struct coro *coro_src = SvSTATE (src);
1026 1121
1027 if (coro->mainstack && coro->mainstack != main_mainstack) 1122 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1028 {
1029 struct coro temp;
1030 1123
1031 PUTBACK; 1124 ++coro_src->refcnt;
1032 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL); 1125 sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1033 LOAD (aTHX_ coro); 1126}
1034 SPAGAIN;
1035
1036 destroy_stacks (aTHX);
1037
1038 LOAD ((&temp)); /* this will get rid of defsv etc.. */
1039 SPAGAIN;
1040
1041 coro->mainstack = 0;
1042 }
1043
1044 deallocate_stack (coro);
1045 SvREFCNT_dec (coro->args);
1046 Safefree (coro);
1047 1127
1048void 1128void
1049_exit(code) 1129_exit (code)
1050 int code 1130 int code
1051 PROTOTYPE: $ 1131 PROTOTYPE: $
1052 CODE: 1132 CODE:
1053 _exit (code); 1133 _exit (code);
1054 1134
1055MODULE = Coro::State PACKAGE = Coro::Cont 1135int
1136cctx_count ()
1137 CODE:
1138 RETVAL = cctx_count;
1139 OUTPUT:
1140 RETVAL
1056 1141
1057# this is slightly dirty (should expose a c-level api) 1142int
1058 1143cctx_idle ()
1059void 1144 CODE:
1060yield(...) 1145 RETVAL = cctx_idle;
1061 PROTOTYPE: @ 1146 OUTPUT:
1062 CODE: 1147 RETVAL
1063 SV *yieldstack;
1064 SV *sv;
1065 AV *defav = GvAV (PL_defgv);
1066 struct coro *prev, *next;
1067
1068 yieldstack = *hv_fetch (
1069 (HV *)SvRV (GvSV (coro_current)),
1070 "yieldstack", sizeof ("yieldstack") - 1,
1071 0
1072 );
1073
1074 /* set up @_ -- ugly */
1075 av_clear (defav);
1076 av_fill (defav, items - 1);
1077 while (items--)
1078 av_store (defav, items, SvREFCNT_inc (ST(items)));
1079
1080 sv = av_pop ((AV *)SvRV (yieldstack));
1081 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1082 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1083 SvREFCNT_dec (sv);
1084
1085 transfer (aTHX_ prev, next, 0);
1086 1148
1087MODULE = Coro::State PACKAGE = Coro 1149MODULE = Coro::State PACKAGE = Coro
1088 1150
1089# this is slightly dirty (should expose a c-level api)
1090
1091BOOT: 1151BOOT:
1092{ 1152{
1093 int i; 1153 int i;
1154
1094 HV *stash = gv_stashpv ("Coro", TRUE); 1155 coro_stash = gv_stashpv ("Coro", TRUE);
1095 1156
1096 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1157 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1097 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1158 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1098 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1159 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1099 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1160 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1100 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1161 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1101 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1162 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1102 1163
1103 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV); 1164 coro_current = get_sv ("Coro::current", FALSE);
1104 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV); 1165 SvREADONLY_on (coro_current);
1105 1166
1106 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1167 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1107 coro_ready[i] = newAV (); 1168 coro_ready[i] = newAV ();
1108 1169
1109 { 1170 {
1110 SV *sv = perl_get_sv("Coro::API", 1); 1171 SV *sv = perl_get_sv("Coro::API", 1);
1111 1172
1112 coroapi.schedule = api_schedule; 1173 coroapi.schedule = api_schedule;
1113 coroapi.cede = api_cede; 1174 coroapi.cede = api_cede;
1114 coroapi.ready = api_ready; 1175 coroapi.ready = api_ready;
1176 coroapi.is_ready = api_is_ready;
1115 coroapi.nready = &coro_nready; 1177 coroapi.nready = &coro_nready;
1116 coroapi.current = coro_current; 1178 coroapi.current = coro_current;
1117 1179
1118 GCoroAPI = &coroapi; 1180 GCoroAPI = &coroapi;
1119 sv_setiv(sv, (IV)&coroapi); 1181 sv_setiv (sv, (IV)&coroapi);
1120 SvREADONLY_on(sv); 1182 SvREADONLY_on (sv);
1121 } 1183 }
1122} 1184}
1123 1185
1124#if !PERL_MICRO 1186int
1187prio (Coro::State coro, int newprio = 0)
1188 ALIAS:
1189 nice = 1
1190 CODE:
1191{
1192 RETVAL = coro->prio;
1125 1193
1126void 1194 if (items > 1)
1195 {
1196 if (ix)
1197 newprio += coro->prio;
1198
1199 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1200 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1201
1202 coro->prio = newprio;
1203 }
1204}
1205
1206SV *
1127ready(self) 1207ready (SV *self)
1128 SV * self
1129 PROTOTYPE: $ 1208 PROTOTYPE: $
1130 CODE: 1209 CODE:
1131 api_ready (self); 1210 RETVAL = boolSV (api_ready (self));
1211 OUTPUT:
1212 RETVAL
1132 1213
1133#endif 1214SV *
1215is_ready (SV *self)
1216 PROTOTYPE: $
1217 CODE:
1218 RETVAL = boolSV (api_is_ready (self));
1219 OUTPUT:
1220 RETVAL
1134 1221
1135int 1222int
1136nready(...) 1223nready (...)
1137 PROTOTYPE: 1224 PROTOTYPE:
1138 CODE: 1225 CODE:
1139 RETVAL = coro_nready; 1226 RETVAL = coro_nready;
1140 OUTPUT: 1227 OUTPUT:
1141 RETVAL 1228 RETVAL
1142 1229
1143void 1230void
1144schedule(...) 1231_set_current (SV *current)
1145 PROTOTYPE: 1232 PROTOTYPE: $
1146 CODE: 1233 CODE:
1147 api_schedule (); 1234 SvREFCNT_dec (SvRV (coro_current));
1235 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1236
1237MODULE = Coro::State PACKAGE = Coro::AIO
1238
1239SV *
1240_get_state ()
1241 CODE:
1242{
1243 RETVAL = newSV (sizeof (struct io_state));
1244 struct io_state *data = (struct io_state *)SvPVX (RETVAL);
1245 SvCUR_set (RETVAL, sizeof (struct io_state));
1246 SvPOK_only (RETVAL);
1247
1248 data->errorno = errno;
1249 data->laststype = PL_laststype;
1250 data->laststatval = PL_laststatval;
1251 data->statcache = PL_statcache;
1252}
1253 OUTPUT:
1254 RETVAL
1148 1255
1149void 1256void
1150cede(...) 1257_set_state (char *data_)
1151 PROTOTYPE: 1258 PROTOTYPE: $
1152 CODE: 1259 CODE:
1153 api_cede (); 1260{
1261 struct io_state *data = (void *)data_;
1154 1262
1263 errno = data->errorno;
1264 PL_laststype = data->laststype;
1265 PL_laststatval = data->laststatval;
1266 PL_statcache = data->statcache;
1267}
1268

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