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Comparing Coro/Coro/State.xs (file contents):
Revision 1.77 by root, Tue Oct 31 23:55:33 2006 UTC vs.
Revision 1.129 by root, Fri Dec 22 04:34:04 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 PERL_VERSION < 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 <errno.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;
… …
64#else 110#else
65# define LOCK (void)0 111# define LOCK (void)0
66# define UNLOCK (void)0 112# define UNLOCK (void)0
67#endif 113#endif
68 114
115struct io_state
116{
117 int errorno;
118 I32 laststype;
119 int laststatval;
120 Stat_t statcache;
121};
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 PMOP *curpm;
134 COP *curcop;
135 JMPENV *top_env;
136 161
137 /* data associated with this coroutine (initial args) */ 162 /* data associated with this coroutine (initial args) */
138 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;
139}; 181};
140 182
141typedef struct coro *Coro__State; 183typedef struct coro *Coro__State;
142typedef struct coro *Coro__State_or_hashref; 184typedef struct coro *Coro__State_or_hashref;
143 185
144static AV * 186static AV *
145coro_clone_padlist (pTHX_ CV *cv) 187coro_clone_padlist (CV *cv)
146{ 188{
147 AV *padlist = CvPADLIST (cv); 189 AV *padlist = CvPADLIST (cv);
148 AV *newpadlist, *newpad; 190 AV *newpadlist, *newpad;
149 191
150 newpadlist = newAV (); 192 newpadlist = newAV ();
151 AvREAL_off (newpadlist); 193 AvREAL_off (newpadlist);
194#if PERL_VERSION_ATLEAST (5,9,0)
195 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
196#else
152 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1); 197 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
198#endif
153 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)]; 199 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
154 --AvFILLp (padlist); 200 --AvFILLp (padlist);
155 201
156 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE))); 202 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
157 av_store (newpadlist, 1, (SV *)newpad); 203 av_store (newpadlist, 1, (SV *)newpad);
158 204
159 return newpadlist; 205 return newpadlist;
160} 206}
161 207
162static void 208static void
163free_padlist (pTHX_ AV *padlist) 209free_padlist (AV *padlist)
164{ 210{
165 /* may be during global destruction */ 211 /* may be during global destruction */
166 if (SvREFCNT (padlist)) 212 if (SvREFCNT (padlist))
167 { 213 {
168 I32 i = AvFILLp (padlist); 214 I32 i = AvFILLp (padlist);
… …
189 AV *padlist; 235 AV *padlist;
190 AV *av = (AV *)mg->mg_obj; 236 AV *av = (AV *)mg->mg_obj;
191 237
192 /* casting is fun. */ 238 /* casting is fun. */
193 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 239 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
194 free_padlist (aTHX_ padlist); 240 free_padlist (padlist);
195 241
196 SvREFCNT_dec (av); 242 SvREFCNT_dec (av);
197 243
198 return 0; 244 return 0;
199} 245}
200 246
201#define PERL_MAGIC_coro PERL_MAGIC_ext 247#define PERL_MAGIC_coro PERL_MAGIC_ext
202 248
203static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 249static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
204 250
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
205/* the next two functions merely cache the padlists */ 258/* the next two functions merely cache the padlists */
206static void 259static void
207get_padlist (pTHX_ CV *cv) 260get_padlist (CV *cv)
208{ 261{
209 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 262 MAGIC *mg = CORO_MAGIC (cv);
263 AV *av;
210 264
211 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 265 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
212 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 266 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
213 else 267 else
214 { 268 {
215#if 0 269#if PREFER_PERL_FUNCTIONS
216 /* this should work - but it doesn't :( */ 270 /* this is probably cleaner, but also slower? */
217 CV *cp = Perl_cv_clone (aTHX_ cv); 271 CV *cp = Perl_cv_clone (cv);
218 CvPADLIST (cv) = CvPADLIST (cp); 272 CvPADLIST (cv) = CvPADLIST (cp);
219 CvPADLIST (cp) = 0; 273 CvPADLIST (cp) = 0;
220 SvREFCNT_dec (cp); 274 SvREFCNT_dec (cp);
221#else 275#else
222 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv); 276 CvPADLIST (cv) = coro_clone_padlist (cv);
223#endif 277#endif
224 } 278 }
225} 279}
226 280
227static void 281static void
228put_padlist (pTHX_ CV *cv) 282put_padlist (CV *cv)
229{ 283{
230 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 284 MAGIC *mg = CORO_MAGIC (cv);
285 AV *av;
231 286
232 if (!mg) 287 if (!mg)
233 { 288 {
234 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0); 289 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
235 mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 290 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
236 mg->mg_virtual = &vtbl_coro; 291 mg->mg_virtual = &vtbl_coro;
237 mg->mg_obj = (SV *)newAV (); 292 mg->mg_obj = (SV *)newAV ();
238 } 293 }
239 294
240 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);
241} 301}
242 302
243#define SB do { 303#define SB do {
244#define SE } while (0) 304#define SE } while (0)
245 305
246#define LOAD(state) load_state(aTHX_ (state));
247#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
248
249#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
250 307
251static void 308static void
252load_state(pTHX_ Coro__State c) 309load_perl (Coro__State c)
253{ 310{
254 PL_dowarn = c->dowarn; 311#define VAR(name,type) PL_ ## name = c->name;
255 PL_in_eval = c->in_eval; 312# include "state.h"
256 313#undef VAR
257 PL_curstackinfo = c->curstackinfo;
258 PL_curstack = c->curstack;
259 PL_mainstack = c->mainstack;
260 PL_stack_sp = c->stack_sp;
261 PL_op = c->op;
262 PL_curpad = c->curpad;
263 PL_comppad = c->comppad;
264 PL_compcv = c->compcv;
265 PL_stack_base = c->stack_base;
266 PL_stack_max = c->stack_max;
267 PL_tmps_stack = c->tmps_stack;
268 PL_tmps_floor = c->tmps_floor;
269 PL_tmps_ix = c->tmps_ix;
270 PL_tmps_max = c->tmps_max;
271 PL_markstack = c->markstack;
272 PL_markstack_ptr = c->markstack_ptr;
273 PL_markstack_max = c->markstack_max;
274 PL_scopestack = c->scopestack;
275 PL_scopestack_ix = c->scopestack_ix;
276 PL_scopestack_max = c->scopestack_max;
277 PL_savestack = c->savestack;
278 PL_savestack_ix = c->savestack_ix;
279 PL_savestack_max = c->savestack_max;
280#if PERL_VERSION < 9
281 PL_retstack = c->retstack;
282 PL_retstack_ix = c->retstack_ix;
283 PL_retstack_max = c->retstack_max;
284#endif
285 PL_curpm = c->curpm;
286 PL_curcop = c->curcop;
287 PL_top_env = c->top_env;
288 314
289 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 315 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
290 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 316 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
291 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 }
292 329
293 { 330 {
294 dSP; 331 dSP;
295 CV *cv; 332 CV *cv;
296 333
297 /* now do the ugly restore mess */ 334 /* now do the ugly restore mess */
298 while ((cv = (CV *)POPs)) 335 while ((cv = (CV *)POPs))
299 { 336 {
300 AV *padlist = (AV *)POPs;
301
302 if (padlist)
303 {
304 put_padlist (aTHX_ cv); /* mark this padlist as available */ 337 put_padlist (cv); /* mark this padlist as available */
305 CvPADLIST(cv) = padlist; 338 CvDEPTH (cv) = PTR2IV (POPs);
306 } 339 CvPADLIST (cv) = (AV *)POPs;
307
308 ++CvDEPTH(cv);
309 } 340 }
310 341
311 PUTBACK; 342 PUTBACK;
312 } 343 }
313} 344}
314 345
315static void 346static void
316save_state(pTHX_ Coro__State c, int flags) 347save_perl (Coro__State c)
317{ 348{
318 { 349 {
319 dSP; 350 dSP;
320 I32 cxix = cxstack_ix; 351 I32 cxix = cxstack_ix;
321 PERL_CONTEXT *ccstk = cxstack; 352 PERL_CONTEXT *ccstk = cxstack;
… …
324 /* 355 /*
325 * 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
326 * (and reinitialize) all cv's in the whole callchain :( 357 * (and reinitialize) all cv's in the whole callchain :(
327 */ 358 */
328 359
360 EXTEND (SP, 3 + 1);
329 PUSHs (Nullsv); 361 PUSHs (Nullsv);
330 /* this loop was inspired by pp_caller */ 362 /* this loop was inspired by pp_caller */
331 for (;;) 363 for (;;)
332 { 364 {
333 while (cxix >= 0) 365 while (cxix >= 0)
334 { 366 {
335 PERL_CONTEXT *cx = &ccstk[cxix--]; 367 PERL_CONTEXT *cx = &ccstk[cxix--];
336 368
337 if (CxTYPE(cx) == CXt_SUB) 369 if (CxTYPE (cx) == CXt_SUB)
338 { 370 {
339 CV *cv = cx->blk_sub.cv; 371 CV *cv = cx->blk_sub.cv;
372
340 if (CvDEPTH(cv)) 373 if (CvDEPTH (cv))
341 { 374 {
342 EXTEND (SP, CvDEPTH(cv)*2); 375 EXTEND (SP, 3);
343
344 while (--CvDEPTH(cv))
345 {
346 /* this tells the restore code to increment CvDEPTH */
347 PUSHs (Nullsv);
348 PUSHs ((SV *)cv);
349 }
350
351 PUSHs ((SV *)CvPADLIST(cv)); 376 PUSHs ((SV *)CvPADLIST (cv));
377 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
352 PUSHs ((SV *)cv); 378 PUSHs ((SV *)cv);
353 379
380 CvDEPTH (cv) = 0;
354 get_padlist (aTHX_ cv); 381 get_padlist (cv);
355 } 382 }
356 } 383 }
357#ifdef CXt_FORMAT
358 else if (CxTYPE(cx) == CXt_FORMAT)
359 {
360 /* I never used formats, so how should I know how these are implemented? */
361 /* my bold guess is as a simple, plain sub... */
362 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
363 }
364#endif
365 } 384 }
366 385
367 if (top_si->si_type == PERLSI_MAIN) 386 if (top_si->si_type == PERLSI_MAIN)
368 break; 387 break;
369 388
… …
373 } 392 }
374 393
375 PUTBACK; 394 PUTBACK;
376 } 395 }
377 396
378 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;
379 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 398 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
380 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;
381 401
382 c->dowarn = PL_dowarn; 402#define VAR(name,type)c->name = PL_ ## name;
383 c->in_eval = PL_in_eval; 403# include "state.h"
384 404#undef VAR
385 c->curstackinfo = PL_curstackinfo;
386 c->curstack = PL_curstack;
387 c->mainstack = PL_mainstack;
388 c->stack_sp = PL_stack_sp;
389 c->op = PL_op;
390 c->curpad = PL_curpad;
391 c->comppad = PL_comppad;
392 c->compcv = PL_compcv;
393 c->stack_base = PL_stack_base;
394 c->stack_max = PL_stack_max;
395 c->tmps_stack = PL_tmps_stack;
396 c->tmps_floor = PL_tmps_floor;
397 c->tmps_ix = PL_tmps_ix;
398 c->tmps_max = PL_tmps_max;
399 c->markstack = PL_markstack;
400 c->markstack_ptr = PL_markstack_ptr;
401 c->markstack_max = PL_markstack_max;
402 c->scopestack = PL_scopestack;
403 c->scopestack_ix = PL_scopestack_ix;
404 c->scopestack_max = PL_scopestack_max;
405 c->savestack = PL_savestack;
406 c->savestack_ix = PL_savestack_ix;
407 c->savestack_max = PL_savestack_max;
408#if PERL_VERSION < 9
409 c->retstack = PL_retstack;
410 c->retstack_ix = PL_retstack_ix;
411 c->retstack_max = PL_retstack_max;
412#endif
413 c->curpm = PL_curpm;
414 c->curcop = PL_curcop;
415 c->top_env = PL_top_env;
416} 405}
417 406
418/* 407/*
419 * allocate various perl stacks. This is an exact copy 408 * allocate various perl stacks. This is an exact copy
420 * of perl.c:init_stacks, except that it uses less memory 409 * of perl.c:init_stacks, except that it uses less memory
421 * on the (sometimes correct) assumption that coroutines do 410 * on the (sometimes correct) assumption that coroutines do
422 * not usually need a lot of stackspace. 411 * not usually need a lot of stackspace.
423 */ 412 */
413#if PREFER_PERL_FUNCTIONS
414# define coro_init_stacks init_stacks
415#else
424static void 416static void
425coro_init_stacks (pTHX) 417coro_init_stacks ()
426{ 418{
427 LOCK;
428
429 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 419 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
430 PL_curstackinfo->si_type = PERLSI_MAIN; 420 PL_curstackinfo->si_type = PERLSI_MAIN;
431 PL_curstack = PL_curstackinfo->si_stack; 421 PL_curstack = PL_curstackinfo->si_stack;
432 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 422 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
433 423
434 PL_stack_base = AvARRAY(PL_curstack); 424 PL_stack_base = AvARRAY(PL_curstack);
435 PL_stack_sp = PL_stack_base; 425 PL_stack_sp = PL_stack_base;
436 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 426 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
437 427
438 New(50,PL_tmps_stack,96,SV*); 428 New(50,PL_tmps_stack,128,SV*);
439 PL_tmps_floor = -1; 429 PL_tmps_floor = -1;
440 PL_tmps_ix = -1; 430 PL_tmps_ix = -1;
441 PL_tmps_max = 96; 431 PL_tmps_max = 128;
442 432
443 New(54,PL_markstack,16,I32); 433 New(54,PL_markstack,32,I32);
444 PL_markstack_ptr = PL_markstack; 434 PL_markstack_ptr = PL_markstack;
445 PL_markstack_max = PL_markstack + 16; 435 PL_markstack_max = PL_markstack + 32;
446 436
447#ifdef SET_MARK_OFFSET 437#ifdef SET_MARK_OFFSET
448 SET_MARK_OFFSET; 438 SET_MARK_OFFSET;
449#endif 439#endif
450 440
451 New(54,PL_scopestack,16,I32); 441 New(54,PL_scopestack,32,I32);
452 PL_scopestack_ix = 0; 442 PL_scopestack_ix = 0;
453 PL_scopestack_max = 16; 443 PL_scopestack_max = 32;
454 444
455 New(54,PL_savestack,96,ANY); 445 New(54,PL_savestack,64,ANY);
456 PL_savestack_ix = 0; 446 PL_savestack_ix = 0;
457 PL_savestack_max = 96; 447 PL_savestack_max = 64;
458 448
459#if PERL_VERSION < 9 449#if !PERL_VERSION_ATLEAST (5,9,0)
460 New(54,PL_retstack,8,OP*); 450 New(54,PL_retstack,16,OP*);
461 PL_retstack_ix = 0; 451 PL_retstack_ix = 0;
462 PL_retstack_max = 8; 452 PL_retstack_max = 16;
463#endif 453#endif
464
465 UNLOCK;
466} 454}
455#endif
467 456
468/* 457/*
469 * destroy the stacks, the callchain etc... 458 * destroy the stacks, the callchain etc...
470 */ 459 */
471static void 460static void
472destroy_stacks(pTHX) 461coro_destroy_stacks ()
473{ 462{
474 if (!IN_DESTRUCT) 463 if (!IN_DESTRUCT)
475 { 464 {
476 /* is this ugly, I ask? */ 465 /* restore all saved variables and stuff */
477 LEAVE_SCOPE (0); 466 LEAVE_SCOPE (0);
467 assert (PL_tmps_floor == -1);
478 468
479 /* sure it is, but more important: is it correct?? :/ */ 469 /* free all temporaries */
480 FREETMPS; 470 FREETMPS;
471 assert (PL_tmps_ix == -1);
481 472
482 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/ 473 POPSTACK_TO (PL_mainstack);
483 } 474 }
484 475
485 while (PL_curstackinfo->si_next) 476 while (PL_curstackinfo->si_next)
486 PL_curstackinfo = PL_curstackinfo->si_next; 477 PL_curstackinfo = PL_curstackinfo->si_next;
487 478
488 while (PL_curstackinfo) 479 while (PL_curstackinfo)
489 { 480 {
490 PERL_SI *p = PL_curstackinfo->si_prev; 481 PERL_SI *p = PL_curstackinfo->si_prev;
491 482
492 { /*D*//*remove*/
493 dSP;
494 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
495 PUTBACK; /* possibly superfluous */
496 }
497
498 if (!IN_DESTRUCT) 483 if (!IN_DESTRUCT)
499 {
500 dounwind (-1);/*D*//*remove*/
501 SvREFCNT_dec (PL_curstackinfo->si_stack); 484 SvREFCNT_dec (PL_curstackinfo->si_stack);
502 }
503 485
504 Safefree (PL_curstackinfo->si_cxstack); 486 Safefree (PL_curstackinfo->si_cxstack);
505 Safefree (PL_curstackinfo); 487 Safefree (PL_curstackinfo);
506 PL_curstackinfo = p; 488 PL_curstackinfo = p;
507 } 489 }
508 490
509 Safefree (PL_tmps_stack); 491 Safefree (PL_tmps_stack);
510 Safefree (PL_markstack); 492 Safefree (PL_markstack);
511 Safefree (PL_scopestack); 493 Safefree (PL_scopestack);
512 Safefree (PL_savestack); 494 Safefree (PL_savestack);
513#if PERL_VERSION < 9 495#if !PERL_VERSION_ATLEAST (5,9,0)
514 Safefree (PL_retstack); 496 Safefree (PL_retstack);
515#endif 497#endif
516} 498}
517 499
518static void 500static void
519allocate_stack (Coro__State ctx, int alloc) 501setup_coro (struct coro *coro)
520{
521 coro_stack *stack;
522
523 New (0, stack, 1, coro_stack);
524
525 stack->refcnt = 1;
526 stack->usecnt = 1;
527 stack->gencnt = ctx->gencnt = 0;
528
529 if (alloc)
530 {
531#if HAVE_MMAP
532 stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
533 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
534 if (stack->sptr == (void *)-1)
535#endif
536 {
537 stack->ssize = - (STACKSIZE * (long)sizeof (long));
538 New (0, stack->sptr, STACKSIZE, long);
539 }
540 }
541 else
542 stack->sptr = 0;
543
544 ctx->stack = stack;
545}
546
547static void
548deallocate_stack (Coro__State ctx)
549{
550 coro_stack *stack = ctx->stack;
551
552 ctx->stack = 0;
553
554 if (stack)
555 {
556 if (!--stack->refcnt)
557 {
558#ifdef HAVE_MMAP
559 if (stack->ssize > 0 && stack->sptr)
560 munmap (stack->sptr, stack->ssize);
561 else
562#endif
563 Safefree (stack->sptr);
564
565 Safefree (stack);
566 }
567 else if (ctx->gencnt == stack->gencnt)
568 --stack->usecnt;
569 }
570}
571
572static void
573setup_coro (void *arg)
574{ 502{
575 /* 503 /*
576 * emulate part of the perl startup here. 504 * emulate part of the perl startup here.
577 */ 505 */
578 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{
579 dSP; 552 dSP;
580 Coro__State ctx = (Coro__State)arg; 553 LOGOP myop;
581 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
582 554
583 coro_init_stacks (aTHX); 555 Zero (&myop, 1, LOGOP);
584 /*PL_curcop = 0;*/ 556 myop.op_next = PL_op;
585 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 557 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
586 SvREFCNT_dec (GvAV (PL_defgv));
587 GvAV (PL_defgv) = ctx->args; ctx->args = 0;
588 558
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);
589 SPAGAIN; 566 SPAGAIN;
590
591 if (ctx->stack)
592 {
593 ctx->cursp = 0;
594
595 PUSHMARK(SP);
596 PUTBACK;
597 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
598
599 if (SvTRUE (ERRSV))
600 croak (NULL);
601 else
602 croak ("FATAL: CCTXT coroutine returned!");
603 }
604 else
605 {
606 UNOP myop;
607
608 PL_op = (OP *)&myop;
609
610 Zero(&myop, 1, UNOP);
611 myop.op_next = Nullop;
612 myop.op_flags = OPf_WANT_VOID;
613
614 PUSHMARK(SP);
615 XPUSHs (sub_init);
616 /*
617 * the next line is slightly wrong, as PL_op->op_next
618 * is actually being executed so we skip the first op.
619 * that doesn't matter, though, since it is only
620 * pp_nextstate and we never return...
621 * ah yes, and I don't care anyways ;)
622 */
623 PUTBACK;
624 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
625 SPAGAIN;
626
627 ENTER; /* necessary e.g. for dounwind */
628 }
629} 567}
630 568
631static void 569static void
632continue_coro (void *arg) 570coro_run (void *arg)
633{ 571{
572 /* coro_run is the alternative tail of transfer(), so unlock here. */
573 UNLOCK;
574
634 /* 575 /*
635 * this is a _very_ stripped down perl interpreter ;) 576 * this is a _very_ stripped down perl interpreter ;)
636 */ 577 */
637 dTHX;
638 Coro__State ctx = (Coro__State)arg;
639
640 PL_top_env = &ctx->start_env; 578 PL_top_env = &PL_start_env;
641 579
642 ctx->cursp = 0; 580 /* inject call to cctx_init */
643 PL_op = PL_op->op_next; 581 prepare_cctx ((coro_cctx *)arg);
644 CALLRUNOPS(aTHX);
645 582
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);
646 abort (); 588 abort ();
647} 589}
648 590
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
649static void 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
650transfer (pTHX_ struct coro *prev, struct coro *next, int flags) 703transfer (struct coro *prev, struct coro *next)
651{ 704{
652 dSTACKLEVEL; 705 dSTACKLEVEL;
653 706
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 }
654 if (prev != next) 713 else if (prev != next)
655 { 714 {
656 if (next->mainstack) 715 coro_cctx *prev__cctx;
716
717 if (prev->flags & CF_NEW)
657 { 718 {
658 LOCK; 719 /* create a new empty context */
659 SAVE (prev, flags); 720 Newz (0, prev->cctx, 1, coro_cctx);
660 LOAD (next); 721 prev->cctx->inuse = 1;
661 UNLOCK; 722 prev->flags &= ~CF_NEW;
662 723 prev->flags |= CF_RUNNING;
663 /* mark this state as in-use */
664 next->mainstack = 0;
665 next->tmps_ix = -2;
666
667 /* stacklevel changed? if yes, grab the stack for us! */
668 if (flags & TRANSFER_SAVE_CCTXT)
669 {
670 if (!prev->stack)
671 allocate_stack (prev, 0);
672 else if (prev->cursp != stacklevel
673 && prev->stack->usecnt > 1)
674 {
675 prev->gencnt = ++prev->stack->gencnt;
676 prev->stack->usecnt = 1;
677 }
678
679 /* has our stack been invalidated? */
680 if (next->stack && next->stack->gencnt != next->gencnt)
681 {
682 deallocate_stack (next);
683 allocate_stack (next, 1);
684 coro_create (&(next->stack->cctx),
685 continue_coro, (void *)next,
686 next->stack->sptr, labs (next->stack->ssize));
687 }
688
689 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
690 prev->cursp = stacklevel;
691 /* don't add any code here */
692 }
693 else
694 next->cursp = stacklevel;
695 } 724 }
696 else if (next->tmps_ix == -2) 725
697 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 }
698 else 749 else
699 { 750 {
700 LOCK; 751 /* coroutine already started */
701 SAVE (prev, -1); /* first get rid of the old state */ 752 save_perl (prev);
702 UNLOCK; 753 load_perl (next);
703
704 if (flags & TRANSFER_SAVE_CCTXT)
705 {
706 if (!prev->stack)
707 allocate_stack (prev, 0);
708
709 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
710 {
711 PL_top_env = &next->start_env;
712
713 setup_coro (next);
714 next->cursp = stacklevel;
715
716 prev->stack->refcnt++;
717 prev->stack->usecnt++;
718 next->stack = prev->stack;
719 next->gencnt = prev->gencnt;
720 }
721 else
722 {
723 assert (!next->stack);
724 allocate_stack (next, 1);
725 coro_create (&(next->stack->cctx),
726 setup_coro, (void *)next,
727 next->stack->sptr, labs (next->stack->ssize));
728 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
729 prev->cursp = stacklevel;
730 /* don't add any code here */
731 }
732 }
733 else
734 {
735 setup_coro (next);
736 next->cursp = stacklevel;
737 }
738 } 754 }
739 }
740 755
741 LOCK; 756 prev__cctx = prev->cctx;
742 if (coro_mortal) 757
743 { 758 /* possibly "free" the cctx */
744 SvREFCNT_dec (coro_mortal); 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
745 coro_mortal = 0; 784 free_coro_mortal ();
746 } 785
747 UNLOCK; 786 UNLOCK;
787 }
748} 788}
749 789
750#define SV_CORO(sv,func) \ 790struct transfer_args
751 do { \ 791{
752 if (SvROK (sv)) \ 792 struct coro *prev, *next;
753 sv = SvRV (sv); \ 793};
754 \
755 if (SvTYPE (sv) == SVt_PVHV) \
756 { \
757 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
758 \
759 if (!he) \
760 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
761 \
762 (sv) = SvRV (HeVAL(he)); \
763 } \
764 \
765 /* must also be changed inside Coro::Cont::yield */ \
766 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
767 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
768 \
769 } while(0)
770 794
771#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv)) 795#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
772 796
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 {
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
819 coro->mainstack = 0;
820 }
821
822 cctx_destroy (coro->cctx);
823 SvREFCNT_dec (coro->args);
824 Safefree (coro);
825}
826
773static 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
774api_transfer(pTHX_ SV *prev, SV *next, int flags) 889api_transfer (SV *prev_sv, SV *next_sv)
775{ 890{
776 SV_CORO (prev, "Coro::transfer"); 891 struct transfer_args ta;
777 SV_CORO (next, "Coro::transfer");
778 892
779 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;
780} 907}
781 908
782/** Coro ********************************************************************/ 909/** Coro ********************************************************************/
783 910
784#define PRIO_MAX 3 911#define PRIO_MAX 3
… …
787#define PRIO_LOW -1 914#define PRIO_LOW -1
788#define PRIO_IDLE -3 915#define PRIO_IDLE -3
789#define PRIO_MIN -4 916#define PRIO_MIN -4
790 917
791/* for Coro.pm */ 918/* for Coro.pm */
792static GV *coro_current, *coro_idle; 919static SV *coro_current;
793static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 920static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
794static int coro_nready; 921static int coro_nready;
795 922
796static void 923static void
797coro_enq (pTHX_ SV *sv) 924coro_enq (SV *coro_sv)
798{ 925{
799 SV **xprio;
800 int prio;
801
802 if (SvTYPE (sv) != SVt_PVHV)
803 croak ("Coro::ready tried to enqueue something that is not a coroutine");
804
805 xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
806 prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
807
808 prio = prio > PRIO_MAX ? PRIO_MAX
809 : prio < PRIO_MIN ? PRIO_MIN
810 : prio;
811
812 av_push (coro_ready [prio - PRIO_MIN], sv); 926 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
813 coro_nready++; 927 coro_nready++;
814} 928}
815 929
816static SV * 930static SV *
817coro_deq (pTHX_ int min_prio) 931coro_deq (int min_prio)
818{ 932{
819 int prio = PRIO_MAX - PRIO_MIN; 933 int prio = PRIO_MAX - PRIO_MIN;
820 934
821 min_prio -= PRIO_MIN; 935 min_prio -= PRIO_MIN;
822 if (min_prio < 0) 936 if (min_prio < 0)
823 min_prio = 0; 937 min_prio = 0;
824 938
825 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 939 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
826 if (av_len (coro_ready[prio]) >= 0) 940 if (AvFILLp (coro_ready [prio]) >= 0)
827 { 941 {
828 coro_nready--; 942 coro_nready--;
829 return av_shift (coro_ready[prio]); 943 return av_shift (coro_ready [prio]);
830 } 944 }
831 945
832 return 0; 946 return 0;
833} 947}
834 948
835static void 949static int
836api_ready (SV *coro) 950api_ready (SV *coro_sv)
837{ 951{
838 dTHX; 952 struct coro *coro;
839 953
840 if (SvROK (coro)) 954 if (SvROK (coro_sv))
841 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;
842 963
843 LOCK; 964 LOCK;
844 coro_enq (aTHX_ SvREFCNT_inc (coro)); 965 coro_enq (SvREFCNT_inc (coro_sv));
845 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);
846} 1031}
847 1032
848static void 1033static void
849api_schedule (void) 1034api_schedule (void)
850{ 1035{
851 dTHX; 1036 struct transfer_args ta;
852 1037
853 SV *prev, *next; 1038 prepare_schedule (&ta);
854 1039 TRANSFER (ta);
855 LOCK;
856
857 prev = SvRV (GvSV (coro_current));
858 next = coro_deq (aTHX_ PRIO_MIN);
859
860 if (!next)
861 next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
862
863 /* free this only after the transfer */
864 coro_mortal = prev;
865 SV_CORO (prev, "Coro::schedule");
866
867 SvRV (GvSV (coro_current)) = next;
868
869 SV_CORO (next, "Coro::schedule");
870
871 UNLOCK;
872
873 transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
874 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
875} 1040}
876 1041
877static void 1042static void
878api_cede (void) 1043api_cede (void)
879{ 1044{
880 dTHX; 1045 struct transfer_args ta;
881 1046
882 LOCK; 1047 prepare_cede (&ta);
883 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current)))); 1048 TRANSFER (ta);
884 UNLOCK;
885
886 api_schedule ();
887} 1049}
888 1050
889MODULE = Coro::State PACKAGE = Coro::State 1051MODULE = Coro::State PACKAGE = Coro::State
890 1052
891PROTOTYPES: ENABLE 1053PROTOTYPES: DISABLE
892 1054
893BOOT: 1055BOOT:
894{ /* {} necessary for stoopid perl-5.6.x */ 1056{
895#ifdef USE_ITHREADS 1057#ifdef USE_ITHREADS
896 MUTEX_INIT (&coro_mutex); 1058 MUTEX_INIT (&coro_mutex);
897#endif 1059#endif
1060 BOOT_PAGESIZE;
898 1061
899 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
900 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
901 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1062 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
902 1063
903 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1064 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
904 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1065 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
905 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));
906 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1068 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
907 1069
908 main_mainstack = PL_mainstack; 1070 main_mainstack = PL_mainstack;
909 1071
910 coroapi.ver = CORO_API_VERSION; 1072 coroapi.ver = CORO_API_VERSION;
911 coroapi.transfer = api_transfer; 1073 coroapi.transfer = api_transfer;
912}
913 1074
914Coro::State 1075 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
915_newprocess(args) 1076}
916 SV * args 1077
917 PROTOTYPE: $ 1078SV *
1079new (char *klass, ...)
918 CODE: 1080 CODE:
919 Coro__State coro; 1081{
1082 struct coro *coro;
1083 HV *hv;
1084 int i;
920 1085
921 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
922 croak ("Coro::State::_newprocess expects an arrayref");
923
924 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;
925 1090
926 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1091 hv = newHV ();
927 /*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;
928 /*coro->stack = 0;*/ 1093 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
929 1094
930 /* same as JMPENV_BOOTSTRAP */ 1095 for (i = 1; i < items; i++)
931 /* we might be able to recycle start_env, but safe is safe */ 1096 av_push (coro->args, newSVsv (ST (i)));
932 /*Zero(&coro->start_env, 1, JMPENV);*/ 1097}
933 coro->start_env.je_ret = -1;
934 coro->start_env.je_mustcatch = TRUE;
935
936 RETVAL = coro;
937 OUTPUT: 1098 OUTPUT:
938 RETVAL 1099 RETVAL
939 1100
1101int
1102save (SV *coro, int new_save = -1)
1103 CODE:
1104 RETVAL = api_save (coro, new_save);
1105 OUTPUT:
1106 RETVAL
1107
940void 1108void
941transfer(prev, next, flags) 1109_set_stacklevel (...)
942 SV *prev 1110 ALIAS:
943 SV *next 1111 Coro::State::transfer = 1
944 int flags 1112 Coro::schedule = 2
945 PROTOTYPE: @ 1113 Coro::cede = 3
946 CODE: 1114 CODE:
947 PUTBACK; 1115{
948 SV_CORO (next, "Coro::transfer"); 1116 struct transfer_args ta;
949 SV_CORO (prev, "Coro::transfer"); 1117
950 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1118 switch (ix)
951 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}
952 1143
953void 1144void
954DESTROY(coro) 1145_clone_state_from (SV *dst, SV *src)
955 Coro::State coro 1146 CODE:
956 CODE: 1147{
1148 struct coro *coro_src = SvSTATE (src);
957 1149
958 if (coro->mainstack && coro->mainstack != main_mainstack) 1150 sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
959 {
960 struct coro temp;
961 1151
962 PUTBACK; 1152 ++coro_src->refcnt;
963 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;
964 LOAD (aTHX_ coro); 1154}
965 SPAGAIN;
966
967 destroy_stacks (aTHX);
968
969 LOAD ((&temp)); /* this will get rid of defsv etc.. */
970 SPAGAIN;
971
972 coro->mainstack = 0;
973 }
974
975 deallocate_stack (coro);
976 SvREFCNT_dec (coro->args);
977 Safefree (coro);
978 1155
979void 1156void
980_exit(code) 1157_exit (code)
981 int code 1158 int code
982 PROTOTYPE: $ 1159 PROTOTYPE: $
983 CODE: 1160 CODE:
984 _exit (code); 1161 _exit (code);
985 1162
986MODULE = Coro::State PACKAGE = Coro::Cont 1163int
1164cctx_count ()
1165 CODE:
1166 RETVAL = cctx_count;
1167 OUTPUT:
1168 RETVAL
987 1169
988# this is slightly dirty (should expose a c-level api) 1170int
989 1171cctx_idle ()
990void 1172 CODE:
991yield(...) 1173 RETVAL = cctx_idle;
992 PROTOTYPE: @ 1174 OUTPUT:
993 CODE: 1175 RETVAL
994 SV *yieldstack;
995 SV *sv;
996 AV *defav = GvAV (PL_defgv);
997 struct coro *prev, *next;
998
999 yieldstack = *hv_fetch (
1000 (HV *)SvRV (GvSV (coro_current)),
1001 "yieldstack", sizeof ("yieldstack") - 1,
1002 0
1003 );
1004
1005 /* set up @_ -- ugly */
1006 av_clear (defav);
1007 av_fill (defav, items - 1);
1008 while (items--)
1009 av_store (defav, items, SvREFCNT_inc (ST(items)));
1010
1011 sv = av_pop ((AV *)SvRV (yieldstack));
1012 prev = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))));
1013 next = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))));
1014 SvREFCNT_dec (sv);
1015
1016 transfer (aTHX_ prev, next, 0);
1017 1176
1018MODULE = Coro::State PACKAGE = Coro 1177MODULE = Coro::State PACKAGE = Coro
1019 1178
1020# this is slightly dirty (should expose a c-level api)
1021
1022BOOT: 1179BOOT:
1023{ 1180{
1024 int i; 1181 int i;
1182
1025 HV *stash = gv_stashpv ("Coro", TRUE); 1183 coro_stash = gv_stashpv ("Coro", TRUE);
1026 1184
1027 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1185 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1028 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1186 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1029 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1187 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1030 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1188 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1031 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1189 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1032 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1190 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1033 1191
1034 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV); 1192 coro_current = get_sv ("Coro::current", FALSE);
1035 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV); 1193 SvREADONLY_on (coro_current);
1036 1194
1037 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1195 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1038 coro_ready[i] = newAV (); 1196 coro_ready[i] = newAV ();
1039 1197
1040 { 1198 {
1041 SV *sv = perl_get_sv("Coro::API", 1); 1199 SV *sv = perl_get_sv("Coro::API", 1);
1042 1200
1043 coroapi.schedule = api_schedule; 1201 coroapi.schedule = api_schedule;
1202 coroapi.save = api_save;
1044 coroapi.cede = api_cede; 1203 coroapi.cede = api_cede;
1045 coroapi.ready = api_ready; 1204 coroapi.ready = api_ready;
1205 coroapi.is_ready = api_is_ready;
1046 coroapi.nready = &coro_nready; 1206 coroapi.nready = &coro_nready;
1047 coroapi.current = coro_current; 1207 coroapi.current = coro_current;
1048 1208
1049 GCoroAPI = &coroapi; 1209 GCoroAPI = &coroapi;
1050 sv_setiv(sv, (IV)&coroapi); 1210 sv_setiv (sv, (IV)&coroapi);
1051 SvREADONLY_on(sv); 1211 SvREADONLY_on (sv);
1052 } 1212 }
1053} 1213}
1054 1214
1055#if !PERL_MICRO
1056
1057void 1215void
1058ready(self) 1216_set_current (SV *current)
1059 SV * self
1060 PROTOTYPE: $ 1217 PROTOTYPE: $
1061 CODE: 1218 CODE:
1062 api_ready (self); 1219 SvREFCNT_dec (SvRV (coro_current));
1063 1220 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1064#endif
1065 1221
1066int 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
1242SV *
1243ready (SV *self)
1244 PROTOTYPE: $
1245 CODE:
1246 RETVAL = boolSV (api_ready (self));
1247 OUTPUT:
1248 RETVAL
1249
1250SV *
1251is_ready (SV *self)
1252 PROTOTYPE: $
1253 CODE:
1254 RETVAL = boolSV (api_is_ready (self));
1255 OUTPUT:
1256 RETVAL
1257
1258int
1067nready(...) 1259nready (...)
1068 PROTOTYPE: 1260 PROTOTYPE:
1069 CODE: 1261 CODE:
1070 RETVAL = coro_nready; 1262 RETVAL = coro_nready;
1071 OUTPUT: 1263 OUTPUT:
1072 RETVAL 1264 RETVAL
1073 1265
1074void 1266MODULE = Coro::State PACKAGE = Coro::AIO
1075schedule(...) 1267
1076 PROTOTYPE: 1268SV *
1269_get_state ()
1077 CODE: 1270 CODE:
1078 api_schedule ();
1079
1080void
1081cede(...)
1082 PROTOTYPE:
1083 CODE:
1084 api_cede ();
1085
1086# and these are hacks
1087SV *
1088_aio_get_state ()
1089 CODE:
1090{ 1271{
1091 struct { 1272 struct io_state *data;
1092 int errorno;
1093 int laststype;
1094 int laststatval;
1095 Stat_t statcache;
1096 } data;
1097 1273
1274 RETVAL = newSV (sizeof (struct io_state));
1275 data = (struct io_state *)SvPVX (RETVAL);
1276 SvCUR_set (RETVAL, sizeof (struct io_state));
1277 SvPOK_only (RETVAL);
1278
1098 data.errorno = errno; 1279 data->errorno = errno;
1099 data.laststype = PL_laststype; 1280 data->laststype = PL_laststype;
1100 data.laststatval = PL_laststatval; 1281 data->laststatval = PL_laststatval;
1101 data.statcache = PL_statcache; 1282 data->statcache = PL_statcache;
1102
1103 RETVAL = newSVpvn ((char *)&data, sizeof data);
1104} 1283}
1105 OUTPUT: 1284 OUTPUT:
1106 RETVAL 1285 RETVAL
1107 1286
1108void 1287void
1109_aio_set_state (char *data_) 1288_set_state (char *data_)
1110 PROTOTYPE: $ 1289 PROTOTYPE: $
1111 CODE: 1290 CODE:
1112{ 1291{
1113 struct { 1292 struct io_state *data = (void *)data_;
1114 int errorno;
1115 int laststype;
1116 int laststatval;
1117 Stat_t statcache;
1118 } *data = (void *)data_;
1119 1293
1120 errno = data->errorno; 1294 errno = data->errorno;
1121 PL_laststype = data->laststype; 1295 PL_laststype = data->laststype;
1122 PL_laststatval = data->laststatval; 1296 PL_laststatval = data->laststatval;
1123 PL_statcache = data->statcache; 1297 PL_statcache = data->statcache;
1124} 1298}
1299

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