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Comparing Coro/Coro/State.xs (file contents):
Revision 1.70 by root, Mon Dec 26 19:26:52 2005 UTC vs.
Revision 1.138 by root, Sun Jan 14 20:49:45 2007 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#include <signal.h> 71#ifndef SvRV_set
34 72# define SvRV_set(s,v) SvRV(s) = (v)
35#ifdef HAVE_MMAP
36# include <unistd.h>
37# include <sys/mman.h>
38# ifndef MAP_ANONYMOUS
39# ifdef MAP_ANON
40# define MAP_ANONYMOUS MAP_ANON
41# else
42# undef HAVE_MMAP
43# endif
44# endif 73#endif
45#endif
46 74
47#define SUB_INIT "Coro::State::initialize" 75#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
48#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
49 87
50/* 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
51 * 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
52 * and should be unique. */ 90 * and should be unique. */
91#define dSTACKLEVEL int stacklevel
53#define dSTACKLEVEL void *stacklevel = &stacklevel 92#define STACKLEVEL ((void *)&stacklevel)
54 93
55#define IN_DESTRUCT (PL_main_cv == Nullcv) 94#define IN_DESTRUCT (PL_main_cv == Nullcv)
56 95
57#define labs(l) ((l) >= 0 ? (l) : -(l)) 96#if __GNUC__ >= 3
97# define attribute(x) __attribute__(x)
98# define BARRIER __asm__ __volatile__ ("" : : : "memory")
99#else
100# define attribute(x)
101# define BARRIER
102#endif
103
104#define NOINLINE attribute ((noinline))
58 105
59#include "CoroAPI.h" 106#include "CoroAPI.h"
60 107
61#ifdef USE_ITHREADS 108#ifdef USE_ITHREADS
62static perl_mutex coro_mutex; 109static perl_mutex coro_mutex;
… …
65#else 112#else
66# define LOCK (void)0 113# define LOCK (void)0
67# define UNLOCK (void)0 114# define UNLOCK (void)0
68#endif 115#endif
69 116
117/* helper storage struct for Coro::AIO */
118struct io_state
119{
120 int errorno;
121 I32 laststype;
122 int laststatval;
123 Stat_t statcache;
124};
125
70static struct CoroAPI coroapi; 126static struct CoroAPI coroapi;
71static AV *main_mainstack; /* used to differentiate between $main and others */ 127static AV *main_mainstack; /* used to differentiate between $main and others */
72static HV *coro_state_stash; 128static HV *coro_state_stash, *coro_stash;
73static SV *ucoro_state_sv;
74static U32 ucoro_state_hash;
75static SV *coro_mortal; /* will be freed after next transfer */ 129static SV *coro_mortal; /* will be freed after next transfer */
76 130
77/* this is actually not only the c stack but also c registers etc... */ 131static struct coro_cctx *cctx_first;
132static int cctx_count, cctx_idle;
133
134/* this is a structure representing a c-level coroutine */
78typedef struct { 135typedef struct coro_cctx {
79 int refcnt; /* pointer reference counter */ 136 struct coro_cctx *next;
80 int usecnt; /* shared by how many coroutines */
81 int gencnt; /* generation counter */
82 137
83 coro_context cctx; 138 /* the stack */
84
85 void *sptr; 139 void *sptr;
86 long ssize; /* positive == mmap, otherwise malloc */ 140 long ssize; /* positive == mmap, otherwise malloc */
87} coro_stack;
88 141
142 /* cpu state */
143 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
144 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
145 JMPENV *top_env;
146 coro_context cctx;
147
148 int inuse;
149
150#if USE_VALGRIND
151 int valgrind_id;
152#endif
153} coro_cctx;
154
155enum {
156 CF_RUNNING = 0x0001, /* coroutine is running */
157 CF_READY = 0x0002, /* coroutine is ready */
158 CF_NEW = 0x0004, /* has never been switched to */
159 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
160};
161
162/* this is a structure representing a perl-level coroutine */
89struct coro { 163struct coro {
90 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 164 /* the c coroutine allocated to this perl coroutine, if any */
91 JMPENV start_env; 165 coro_cctx *cctx;
92
93 /* the optional C context */
94 coro_stack *stack;
95 void *cursp;
96 int gencnt;
97
98 /* optionally saved, might be zero */
99 AV *defav;
100 SV *defsv;
101 SV *errsv;
102
103 /* saved global state not related to stacks */
104 U8 dowarn;
105 I32 in_eval;
106
107 /* the stacks and related info (callchain etc..) */
108 PERL_SI *curstackinfo;
109 AV *curstack;
110 AV *mainstack;
111 SV **stack_sp;
112 OP *op;
113 SV **curpad;
114 AV *comppad;
115 CV *compcv;
116 SV **stack_base;
117 SV **stack_max;
118 SV **tmps_stack;
119 I32 tmps_floor;
120 I32 tmps_ix;
121 I32 tmps_max;
122 I32 *markstack;
123 I32 *markstack_ptr;
124 I32 *markstack_max;
125 I32 *scopestack;
126 I32 scopestack_ix;
127 I32 scopestack_max;
128 ANY *savestack;
129 I32 savestack_ix;
130 I32 savestack_max;
131 OP **retstack;
132 I32 retstack_ix;
133 I32 retstack_max;
134 PMOP *curpm;
135 COP *curcop;
136 JMPENV *top_env;
137 166
138 /* data associated with this coroutine (initial args) */ 167 /* data associated with this coroutine (initial args) */
139 AV *args; 168 AV *args;
169 int refcnt;
170 int save; /* CORO_SAVE flags */
171 int flags; /* CF_ flags */
172
173 /* optionally saved, might be zero */
174 AV *defav; /* @_ */
175 SV *defsv; /* $_ */
176 SV *errsv; /* $@ */
177 SV *irssv; /* $/ */
178 SV *irssv_sv; /* real $/ cache */
179
180#define VAR(name,type) type name;
181# include "state.h"
182#undef VAR
183
184 /* coro process data */
185 int prio;
140}; 186};
141 187
142typedef struct coro *Coro__State; 188typedef struct coro *Coro__State;
143typedef struct coro *Coro__State_or_hashref; 189typedef struct coro *Coro__State_or_hashref;
144 190
145/* mostly copied from op.c:cv_clone2 */ 191/** Coro ********************************************************************/
146STATIC AV * 192
147clone_padlist (pTHX_ AV *protopadlist) 193#define PRIO_MAX 3
194#define PRIO_HIGH 1
195#define PRIO_NORMAL 0
196#define PRIO_LOW -1
197#define PRIO_IDLE -3
198#define PRIO_MIN -4
199
200/* for Coro.pm */
201static SV *coro_current;
202static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
203static int coro_nready;
204
205/** lowlevel stuff **********************************************************/
206
207static AV *
208coro_clone_padlist (CV *cv)
148{ 209{
149 AV *av; 210 AV *padlist = CvPADLIST (cv);
150 I32 ix;
151 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
152 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
153 SV **pname = AvARRAY (protopad_name);
154 SV **ppad = AvARRAY (protopad);
155 I32 fname = AvFILLp (protopad_name);
156 I32 fpad = AvFILLp (protopad);
157 AV *newpadlist, *newpad_name, *newpad; 211 AV *newpadlist, *newpad;
158 SV **npad;
159
160 newpad_name = newAV ();
161 for (ix = fname; ix >= 0; ix--)
162 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
163
164 newpad = newAV ();
165 av_fill (newpad, AvFILLp (protopad));
166 npad = AvARRAY (newpad);
167 212
168 newpadlist = newAV (); 213 newpadlist = newAV ();
169 AvREAL_off (newpadlist); 214 AvREAL_off (newpadlist);
170 av_store (newpadlist, 0, (SV *) newpad_name); 215#if PERL_VERSION_ATLEAST (5,9,0)
216 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
217#else
218 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
219#endif
220 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
221 --AvFILLp (padlist);
222
223 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
171 av_store (newpadlist, 1, (SV *) newpad); 224 av_store (newpadlist, 1, (SV *)newpad);
172
173 av = newAV (); /* will be @_ */
174 av_extend (av, 0);
175 av_store (newpad, 0, (SV *) av);
176 AvFLAGS (av) = AVf_REIFY;
177
178 for (ix = fpad; ix > 0; ix--)
179 {
180 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
181
182 if (namesv && namesv != &PL_sv_undef)
183 {
184 char *name = SvPVX (namesv); /* XXX */
185
186 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
187 { /* lexical from outside? */
188 npad[ix] = SvREFCNT_inc (ppad[ix]);
189 }
190 else
191 { /* our own lexical */
192 SV *sv;
193 if (*name == '&')
194 sv = SvREFCNT_inc (ppad[ix]);
195 else if (*name == '@')
196 sv = (SV *) newAV ();
197 else if (*name == '%')
198 sv = (SV *) newHV ();
199 else
200 sv = NEWSV (0, 0);
201
202#ifdef SvPADBUSY
203 if (!SvPADBUSY (sv))
204#endif
205 SvPADMY_on (sv);
206
207 npad[ix] = sv;
208 }
209 }
210 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
211 {
212 npad[ix] = SvREFCNT_inc (ppad[ix]);
213 }
214 else
215 {
216 SV *sv = NEWSV (0, 0);
217 SvPADTMP_on (sv);
218 npad[ix] = sv;
219 }
220 }
221
222#if 0 /* return -ENOTUNDERSTOOD */
223 /* Now that vars are all in place, clone nested closures. */
224
225 for (ix = fpad; ix > 0; ix--) {
226 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
227 if (namesv
228 && namesv != &PL_sv_undef
229 && !(SvFLAGS(namesv) & SVf_FAKE)
230 && *SvPVX(namesv) == '&'
231 && CvCLONE(ppad[ix]))
232 {
233 CV *kid = cv_clone((CV*)ppad[ix]);
234 SvREFCNT_dec(ppad[ix]);
235 CvCLONE_on(kid);
236 SvPADMY_on(kid);
237 npad[ix] = (SV*)kid;
238 }
239 }
240#endif
241 225
242 return newpadlist; 226 return newpadlist;
243} 227}
244 228
245STATIC void 229static void
246free_padlist (pTHX_ AV *padlist) 230free_padlist (AV *padlist)
247{ 231{
248 /* may be during global destruction */ 232 /* may be during global destruction */
249 if (SvREFCNT (padlist)) 233 if (SvREFCNT (padlist))
250 { 234 {
251 I32 i = AvFILLp (padlist); 235 I32 i = AvFILLp (padlist);
… …
264 248
265 SvREFCNT_dec ((SV*)padlist); 249 SvREFCNT_dec ((SV*)padlist);
266 } 250 }
267} 251}
268 252
269STATIC int 253static int
270coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 254coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
271{ 255{
272 AV *padlist; 256 AV *padlist;
273 AV *av = (AV *)mg->mg_obj; 257 AV *av = (AV *)mg->mg_obj;
274 258
275 /* casting is fun. */ 259 /* casting is fun. */
276 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 260 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
277 free_padlist (aTHX_ padlist); 261 free_padlist (padlist);
278 262
279 SvREFCNT_dec (av); 263 SvREFCNT_dec (av);
264
265 return 0;
280} 266}
281 267
282#define PERL_MAGIC_coro PERL_MAGIC_ext 268#define PERL_MAGIC_coro PERL_MAGIC_ext
283 269
284static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 270static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
285 271
272#define CORO_MAGIC(cv) \
273 SvMAGIC (cv) \
274 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
275 ? SvMAGIC (cv) \
276 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
277 : 0
278
286/* the next two functions merely cache the padlists */ 279/* the next two functions merely cache the padlists */
287STATIC void 280static void
288get_padlist (pTHX_ CV *cv) 281get_padlist (CV *cv)
289{ 282{
290 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 283 MAGIC *mg = CORO_MAGIC (cv);
284 AV *av;
291 285
292 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 286 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
293 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 287 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
294 else 288 else
289 {
290#if PREFER_PERL_FUNCTIONS
291 /* this is probably cleaner, but also slower? */
292 CV *cp = Perl_cv_clone (cv);
293 CvPADLIST (cv) = CvPADLIST (cp);
294 CvPADLIST (cp) = 0;
295 SvREFCNT_dec (cp);
296#else
295 CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv)); 297 CvPADLIST (cv) = coro_clone_padlist (cv);
298#endif
299 }
296} 300}
297 301
298STATIC void 302static void
299put_padlist (pTHX_ CV *cv) 303put_padlist (CV *cv)
300{ 304{
301 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 305 MAGIC *mg = CORO_MAGIC (cv);
306 AV *av;
302 307
303 if (!mg) 308 if (!mg)
304 { 309 {
305 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0); 310 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
306 mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 311 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
307 mg->mg_virtual = &vtbl_coro; 312 mg->mg_virtual = &vtbl_coro;
308 mg->mg_obj = (SV *)newAV (); 313 mg->mg_obj = (SV *)newAV ();
309 } 314 }
310 315
311 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 316 av = (AV *)mg->mg_obj;
317
318 if (AvFILLp (av) >= AvMAX (av))
319 av_extend (av, AvMAX (av) + 1);
320
321 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
312} 322}
323
324/** load & save, init *******************************************************/
313 325
314#define SB do { 326#define SB do {
315#define SE } while (0) 327#define SE } while (0)
316 328
317#define LOAD(state) load_state(aTHX_ (state));
318#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
319
320#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 329#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
321 330
322static void 331static void
323load_state(pTHX_ Coro__State c) 332load_perl (Coro__State c)
324{ 333{
325 PL_dowarn = c->dowarn; 334#define VAR(name,type) PL_ ## name = c->name;
326 PL_in_eval = c->in_eval; 335# include "state.h"
327 336#undef VAR
328 PL_curstackinfo = c->curstackinfo;
329 PL_curstack = c->curstack;
330 PL_mainstack = c->mainstack;
331 PL_stack_sp = c->stack_sp;
332 PL_op = c->op;
333 PL_curpad = c->curpad;
334 PL_comppad = c->comppad;
335 PL_compcv = c->compcv;
336 PL_stack_base = c->stack_base;
337 PL_stack_max = c->stack_max;
338 PL_tmps_stack = c->tmps_stack;
339 PL_tmps_floor = c->tmps_floor;
340 PL_tmps_ix = c->tmps_ix;
341 PL_tmps_max = c->tmps_max;
342 PL_markstack = c->markstack;
343 PL_markstack_ptr = c->markstack_ptr;
344 PL_markstack_max = c->markstack_max;
345 PL_scopestack = c->scopestack;
346 PL_scopestack_ix = c->scopestack_ix;
347 PL_scopestack_max = c->scopestack_max;
348 PL_savestack = c->savestack;
349 PL_savestack_ix = c->savestack_ix;
350 PL_savestack_max = c->savestack_max;
351 PL_retstack = c->retstack;
352 PL_retstack_ix = c->retstack_ix;
353 PL_retstack_max = c->retstack_max;
354 PL_curpm = c->curpm;
355 PL_curcop = c->curcop;
356 PL_top_env = c->top_env;
357 337
358 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 338 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
359 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 339 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
360 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 340 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
341 if (c->irssv)
342 {
343 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
344 SvREFCNT_dec (c->irssv);
345 else
346 {
347 REPLACE_SV (PL_rs, c->irssv);
348 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
349 sv_setsv (c->irssv_sv, PL_rs);
350 }
351 }
361 352
362 { 353 {
363 dSP; 354 dSP;
364 CV *cv; 355 CV *cv;
365 356
366 /* now do the ugly restore mess */ 357 /* now do the ugly restore mess */
367 while ((cv = (CV *)POPs)) 358 while ((cv = (CV *)POPs))
368 { 359 {
369 AV *padlist = (AV *)POPs;
370
371 if (padlist)
372 {
373 put_padlist (aTHX_ cv); /* mark this padlist as available */ 360 put_padlist (cv); /* mark this padlist as available */
374 CvPADLIST(cv) = padlist; 361 CvDEPTH (cv) = PTR2IV (POPs);
375 } 362 CvPADLIST (cv) = (AV *)POPs;
376
377 ++CvDEPTH(cv);
378 } 363 }
379 364
380 PUTBACK; 365 PUTBACK;
381 } 366 }
382} 367}
383 368
384static void 369static void
385save_state(pTHX_ Coro__State c, int flags) 370save_perl (Coro__State c)
386{ 371{
387 { 372 {
388 dSP; 373 dSP;
389 I32 cxix = cxstack_ix; 374 I32 cxix = cxstack_ix;
390 PERL_CONTEXT *ccstk = cxstack; 375 PERL_CONTEXT *ccstk = cxstack;
… …
393 /* 378 /*
394 * the worst thing you can imagine happens first - we have to save 379 * the worst thing you can imagine happens first - we have to save
395 * (and reinitialize) all cv's in the whole callchain :( 380 * (and reinitialize) all cv's in the whole callchain :(
396 */ 381 */
397 382
383 EXTEND (SP, 3 + 1);
398 PUSHs (Nullsv); 384 PUSHs (Nullsv);
399 /* this loop was inspired by pp_caller */ 385 /* this loop was inspired by pp_caller */
400 for (;;) 386 for (;;)
401 { 387 {
402 while (cxix >= 0) 388 while (cxix >= 0)
403 { 389 {
404 PERL_CONTEXT *cx = &ccstk[cxix--]; 390 PERL_CONTEXT *cx = &ccstk[cxix--];
405 391
406 if (CxTYPE(cx) == CXt_SUB) 392 if (CxTYPE (cx) == CXt_SUB)
407 { 393 {
408 CV *cv = cx->blk_sub.cv; 394 CV *cv = cx->blk_sub.cv;
395
409 if (CvDEPTH(cv)) 396 if (CvDEPTH (cv))
410 { 397 {
411 EXTEND (SP, CvDEPTH(cv)*2); 398 EXTEND (SP, 3);
412
413 while (--CvDEPTH(cv))
414 {
415 /* this tells the restore code to increment CvDEPTH */
416 PUSHs (Nullsv);
417 PUSHs ((SV *)cv);
418 }
419
420 PUSHs ((SV *)CvPADLIST(cv)); 399 PUSHs ((SV *)CvPADLIST (cv));
400 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
421 PUSHs ((SV *)cv); 401 PUSHs ((SV *)cv);
422 402
423 get_padlist (aTHX_ cv); /* this is a monster */ 403 CvDEPTH (cv) = 0;
404 get_padlist (cv);
424 } 405 }
425 } 406 }
426#ifdef CXt_FORMAT
427 else if (CxTYPE(cx) == CXt_FORMAT)
428 {
429 /* I never used formats, so how should I know how these are implemented? */
430 /* my bold guess is as a simple, plain sub... */
431 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
432 }
433#endif
434 } 407 }
435 408
436 if (top_si->si_type == PERLSI_MAIN) 409 if (top_si->si_type == PERLSI_MAIN)
437 break; 410 break;
438 411
… …
442 } 415 }
443 416
444 PUTBACK; 417 PUTBACK;
445 } 418 }
446 419
447 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 420 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
448 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 421 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
449 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 422 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
423 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
450 424
451 c->dowarn = PL_dowarn; 425#define VAR(name,type)c->name = PL_ ## name;
452 c->in_eval = PL_in_eval; 426# include "state.h"
453 427#undef VAR
454 c->curstackinfo = PL_curstackinfo;
455 c->curstack = PL_curstack;
456 c->mainstack = PL_mainstack;
457 c->stack_sp = PL_stack_sp;
458 c->op = PL_op;
459 c->curpad = PL_curpad;
460 c->comppad = PL_comppad;
461 c->compcv = PL_compcv;
462 c->stack_base = PL_stack_base;
463 c->stack_max = PL_stack_max;
464 c->tmps_stack = PL_tmps_stack;
465 c->tmps_floor = PL_tmps_floor;
466 c->tmps_ix = PL_tmps_ix;
467 c->tmps_max = PL_tmps_max;
468 c->markstack = PL_markstack;
469 c->markstack_ptr = PL_markstack_ptr;
470 c->markstack_max = PL_markstack_max;
471 c->scopestack = PL_scopestack;
472 c->scopestack_ix = PL_scopestack_ix;
473 c->scopestack_max = PL_scopestack_max;
474 c->savestack = PL_savestack;
475 c->savestack_ix = PL_savestack_ix;
476 c->savestack_max = PL_savestack_max;
477 c->retstack = PL_retstack;
478 c->retstack_ix = PL_retstack_ix;
479 c->retstack_max = PL_retstack_max;
480 c->curpm = PL_curpm;
481 c->curcop = PL_curcop;
482 c->top_env = PL_top_env;
483} 428}
484 429
485/* 430/*
486 * allocate various perl stacks. This is an exact copy 431 * allocate various perl stacks. This is an exact copy
487 * of perl.c:init_stacks, except that it uses less memory 432 * of perl.c:init_stacks, except that it uses less memory
488 * on the (sometimes correct) assumption that coroutines do 433 * on the (sometimes correct) assumption that coroutines do
489 * not usually need a lot of stackspace. 434 * not usually need a lot of stackspace.
490 */ 435 */
491STATIC void 436#if PREFER_PERL_FUNCTIONS
437# define coro_init_stacks init_stacks
438#else
439static void
492coro_init_stacks (pTHX) 440coro_init_stacks ()
493{ 441{
494 LOCK;
495
496 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 442 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
497 PL_curstackinfo->si_type = PERLSI_MAIN; 443 PL_curstackinfo->si_type = PERLSI_MAIN;
498 PL_curstack = PL_curstackinfo->si_stack; 444 PL_curstack = PL_curstackinfo->si_stack;
499 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 445 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
500 446
501 PL_stack_base = AvARRAY(PL_curstack); 447 PL_stack_base = AvARRAY(PL_curstack);
502 PL_stack_sp = PL_stack_base; 448 PL_stack_sp = PL_stack_base;
503 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 449 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
504 450
505 New(50,PL_tmps_stack,96,SV*); 451 New(50,PL_tmps_stack,128,SV*);
506 PL_tmps_floor = -1; 452 PL_tmps_floor = -1;
507 PL_tmps_ix = -1; 453 PL_tmps_ix = -1;
508 PL_tmps_max = 96; 454 PL_tmps_max = 128;
509 455
510 New(54,PL_markstack,16,I32); 456 New(54,PL_markstack,32,I32);
511 PL_markstack_ptr = PL_markstack; 457 PL_markstack_ptr = PL_markstack;
512 PL_markstack_max = PL_markstack + 16; 458 PL_markstack_max = PL_markstack + 32;
513 459
514#ifdef SET_MARK_OFFSET 460#ifdef SET_MARK_OFFSET
515 SET_MARK_OFFSET; 461 SET_MARK_OFFSET;
516#endif 462#endif
517 463
518 New(54,PL_scopestack,16,I32); 464 New(54,PL_scopestack,32,I32);
519 PL_scopestack_ix = 0; 465 PL_scopestack_ix = 0;
520 PL_scopestack_max = 16; 466 PL_scopestack_max = 32;
521 467
522 New(54,PL_savestack,96,ANY); 468 New(54,PL_savestack,64,ANY);
523 PL_savestack_ix = 0; 469 PL_savestack_ix = 0;
524 PL_savestack_max = 96; 470 PL_savestack_max = 64;
525 471
472#if !PERL_VERSION_ATLEAST (5,9,0)
526 New(54,PL_retstack,8,OP*); 473 New(54,PL_retstack,16,OP*);
527 PL_retstack_ix = 0; 474 PL_retstack_ix = 0;
528 PL_retstack_max = 8; 475 PL_retstack_max = 16;
529 476#endif
530 UNLOCK;
531} 477}
478#endif
532 479
533/* 480/*
534 * destroy the stacks, the callchain etc... 481 * destroy the stacks, the callchain etc...
535 */ 482 */
536STATIC void 483static void
537destroy_stacks(pTHX) 484coro_destroy_stacks ()
538{ 485{
539 if (!IN_DESTRUCT) 486 if (!IN_DESTRUCT)
540 { 487 {
541 /* is this ugly, I ask? */ 488 /* restore all saved variables and stuff */
542 LEAVE_SCOPE (0); 489 LEAVE_SCOPE (0);
490 assert (PL_tmps_floor == -1);
543 491
544 /* sure it is, but more important: is it correct?? :/ */ 492 /* free all temporaries */
545 FREETMPS; 493 FREETMPS;
494 assert (PL_tmps_ix == -1);
546 495
496 /* unwind all extra stacks */
547 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/ 497 POPSTACK_TO (PL_mainstack);
498
499 /* unwind main stack */
500 dounwind (-1);
548 } 501 }
549 502
550 while (PL_curstackinfo->si_next) 503 while (PL_curstackinfo->si_next)
551 PL_curstackinfo = PL_curstackinfo->si_next; 504 PL_curstackinfo = PL_curstackinfo->si_next;
552 505
553 while (PL_curstackinfo) 506 while (PL_curstackinfo)
554 { 507 {
555 PERL_SI *p = PL_curstackinfo->si_prev; 508 PERL_SI *p = PL_curstackinfo->si_prev;
556 509
557 { /*D*//*remove*/
558 dSP;
559 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
560 PUTBACK; /* possibly superfluous */
561 }
562
563 if (!IN_DESTRUCT) 510 if (!IN_DESTRUCT)
564 {
565 dounwind (-1);/*D*//*remove*/
566 SvREFCNT_dec (PL_curstackinfo->si_stack); 511 SvREFCNT_dec (PL_curstackinfo->si_stack);
567 }
568 512
569 Safefree (PL_curstackinfo->si_cxstack); 513 Safefree (PL_curstackinfo->si_cxstack);
570 Safefree (PL_curstackinfo); 514 Safefree (PL_curstackinfo);
571 PL_curstackinfo = p; 515 PL_curstackinfo = p;
572 } 516 }
573 517
574 Safefree (PL_tmps_stack); 518 Safefree (PL_tmps_stack);
575 Safefree (PL_markstack); 519 Safefree (PL_markstack);
576 Safefree (PL_scopestack); 520 Safefree (PL_scopestack);
577 Safefree (PL_savestack); 521 Safefree (PL_savestack);
522#if !PERL_VERSION_ATLEAST (5,9,0)
578 Safefree (PL_retstack); 523 Safefree (PL_retstack);
579}
580
581static void
582allocate_stack (Coro__State ctx, int alloc)
583{
584 coro_stack *stack;
585
586 New (0, stack, 1, coro_stack);
587
588 stack->refcnt = 1;
589 stack->usecnt = 1;
590 stack->gencnt = ctx->gencnt = 0;
591
592 if (alloc)
593 {
594#if HAVE_MMAP
595 stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
596 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
597 if (stack->sptr == (void *)-1)
598#endif 524#endif
599 {
600 /*FIXME*//*D*//* reasonable stack size! */
601 stack->ssize = - (STACKSIZE * sizeof (long));
602 New (0, stack->sptr, STACKSIZE, long);
603 }
604 }
605 else
606 stack->sptr = 0;
607
608 ctx->stack = stack;
609} 525}
610 526
611static void 527/** coroutine stack handling ************************************************/
612deallocate_stack (Coro__State ctx)
613{
614 coro_stack *stack = ctx->stack;
615 528
616 ctx->stack = 0;
617
618 if (stack)
619 {
620 if (!--stack->refcnt)
621 {
622#ifdef HAVE_MMAP
623 if (stack->ssize > 0 && stack->sptr)
624 munmap (stack->sptr, stack->ssize);
625 else
626#endif
627 Safefree (stack->sptr);
628
629 Safefree (stack);
630 }
631 else if (ctx->gencnt == stack->gencnt)
632 --stack->usecnt;
633 }
634}
635
636static void 529static void
637setup_coro (void *arg) 530setup_coro (struct coro *coro)
638{ 531{
639 /* 532 /*
640 * emulate part of the perl startup here. 533 * emulate part of the perl startup here.
641 */ 534 */
642 dTHX; 535
536 coro_init_stacks ();
537
538 PL_curcop = &PL_compiling;
539 PL_in_eval = EVAL_NULL;
540 PL_curpm = 0;
541 PL_localizing = 0;
542 PL_dirty = 0;
543 PL_restartop = 0;
544
545 {
546 dSP;
547 LOGOP myop;
548
549 SvREFCNT_dec (GvAV (PL_defgv));
550 GvAV (PL_defgv) = coro->args; coro->args = 0;
551
552 Zero (&myop, 1, LOGOP);
553 myop.op_next = Nullop;
554 myop.op_flags = OPf_WANT_VOID;
555
556 PUSHMARK (SP);
557 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
558 PUTBACK;
559 PL_op = (OP *)&myop;
560 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
561 SPAGAIN;
562 }
563
564 ENTER; /* necessary e.g. for dounwind */
565}
566
567static void
568free_coro_mortal ()
569{
570 if (coro_mortal)
571 {
572 SvREFCNT_dec (coro_mortal);
573 coro_mortal = 0;
574 }
575}
576
577/* inject a fake call to Coro::State::_cctx_init into the execution */
578static void NOINLINE
579prepare_cctx (coro_cctx *cctx)
580{
643 dSP; 581 dSP;
644 Coro__State ctx = (Coro__State)arg; 582 LOGOP myop;
645 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
646 583
647 coro_init_stacks (aTHX); 584 Zero (&myop, 1, LOGOP);
648 /*PL_curcop = 0;*/ 585 myop.op_next = PL_op;
649 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 586 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
650 SvREFCNT_dec (GvAV (PL_defgv));
651 GvAV (PL_defgv) = ctx->args; ctx->args = 0;
652 587
588 PUSHMARK (SP);
589 EXTEND (SP, 2);
590 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
591 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
592 PUTBACK;
593 PL_op = (OP *)&myop;
594 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
653 SPAGAIN; 595 SPAGAIN;
654
655 if (ctx->stack)
656 {
657 ctx->cursp = 0;
658
659 PUSHMARK(SP);
660 PUTBACK;
661 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
662
663 if (SvTRUE (ERRSV))
664 croak (NULL);
665 else
666 croak ("FATAL: CCTXT coroutine returned!");
667 }
668 else
669 {
670 UNOP myop;
671
672 PL_op = (OP *)&myop;
673
674 Zero(&myop, 1, UNOP);
675 myop.op_next = Nullop;
676 myop.op_flags = OPf_WANT_VOID;
677
678 PUSHMARK(SP);
679 XPUSHs (sub_init);
680 /*
681 * the next line is slightly wrong, as PL_op->op_next
682 * is actually being executed so we skip the first op.
683 * that doesn't matter, though, since it is only
684 * pp_nextstate and we never return...
685 * ah yes, and I don't care anyways ;)
686 */
687 PUTBACK;
688 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
689 SPAGAIN;
690
691 ENTER; /* necessary e.g. for dounwind */
692 }
693} 596}
694 597
695static void 598static void
696continue_coro (void *arg) 599coro_run (void *arg)
697{ 600{
601 /* coro_run is the alternative tail of transfer(), so unlock here. */
602 UNLOCK;
603
698 /* 604 /*
699 * this is a _very_ stripped down perl interpreter ;) 605 * this is a _very_ stripped down perl interpreter ;)
700 */ 606 */
701 dTHX;
702 Coro__State ctx = (Coro__State)arg;
703 JMPENV coro_start_env;
704
705 PL_top_env = &ctx->start_env; 607 PL_top_env = &PL_start_env;
706 608
707 ctx->cursp = 0; 609 /* inject call to cctx_init */
708 PL_op = PL_op->op_next; 610 prepare_cctx ((coro_cctx *)arg);
709 CALLRUNOPS(aTHX);
710 611
612 /* somebody will hit me for both perl_run and PL_restartop */
613 PL_restartop = PL_op;
614 perl_run (PL_curinterp);
615
616 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
711 abort (); 617 abort ();
712} 618}
713 619
714STATIC void 620static coro_cctx *
621cctx_new ()
622{
623 coro_cctx *cctx;
624
625 ++cctx_count;
626
627 Newz (0, cctx, 1, coro_cctx);
628
629#if HAVE_MMAP
630
631 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
632 /* mmap supposedly does allocate-on-write for us */
633 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
634
635 if (cctx->sptr == (void *)-1)
636 {
637 perror ("FATAL: unable to mmap stack for coroutine");
638 _exit (EXIT_FAILURE);
639 }
640
641# if STACKGUARD
642 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
643# endif
644
645#else
646
647 cctx->ssize = STACKSIZE * (long)sizeof (long);
648 New (0, cctx->sptr, STACKSIZE, long);
649
650 if (!cctx->sptr)
651 {
652 perror ("FATAL: unable to malloc stack for coroutine");
653 _exit (EXIT_FAILURE);
654 }
655
656#endif
657
658#if USE_VALGRIND
659 cctx->valgrind_id = VALGRIND_STACK_REGISTER (
660 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
661 cctx->ssize + (char *)cctx->sptr
662 );
663#endif
664
665 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
666
667 return cctx;
668}
669
670static void
671cctx_destroy (coro_cctx *cctx)
672{
673 if (!cctx)
674 return;
675
676 --cctx_count;
677
678#if USE_VALGRIND
679 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
680#endif
681
682#if HAVE_MMAP
683 munmap (cctx->sptr, cctx->ssize);
684#else
685 Safefree (cctx->sptr);
686#endif
687
688 Safefree (cctx);
689}
690
691static coro_cctx *
692cctx_get ()
693{
694 coro_cctx *cctx;
695
696 if (cctx_first)
697 {
698 cctx = cctx_first;
699 cctx_first = cctx->next;
700 --cctx_idle;
701 }
702 else
703 {
704 cctx = cctx_new ();
705 PL_op = PL_op->op_next;
706 }
707
708 return cctx;
709}
710
711static void
712cctx_put (coro_cctx *cctx)
713{
714 /* free another cctx if overlimit */
715 if (cctx_idle >= MAX_IDLE_CCTX)
716 {
717 coro_cctx *first = cctx_first;
718 cctx_first = first->next;
719 --cctx_idle;
720
721 assert (!first->inuse);
722 cctx_destroy (first);
723 }
724
725 ++cctx_idle;
726 cctx->next = cctx_first;
727 cctx_first = cctx;
728}
729
730/** coroutine switching *****************************************************/
731
732/* never call directly, always through the coro_state_transfer global variable */
733static void NOINLINE
715transfer (pTHX_ struct coro *prev, struct coro *next, int flags) 734transfer (struct coro *prev, struct coro *next)
716{ 735{
717 dSTACKLEVEL; 736 dSTACKLEVEL;
718 737
738 /* sometimes transfer is only called to set idle_sp */
739 if (!next)
740 {
741 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
742 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
743 }
719 if (prev != next) 744 else if (prev != next)
720 { 745 {
721 if (next->mainstack) 746 coro_cctx *prev__cctx;
747
748 if (prev->flags & CF_NEW)
722 { 749 {
723 LOCK; 750 /* create a new empty context */
724 SAVE (prev, flags); 751 Newz (0, prev->cctx, 1, coro_cctx);
725 LOAD (next); 752 prev->cctx->inuse = 1;
726 UNLOCK; 753 prev->flags &= ~CF_NEW;
727 754 prev->flags |= CF_RUNNING;
728 /* mark this state as in-use */
729 next->mainstack = 0;
730 next->tmps_ix = -2;
731
732 /* stacklevel changed? if yes, grab the stack for us! */
733 if (flags & TRANSFER_SAVE_CCTXT)
734 {
735 if (!prev->stack)
736 allocate_stack (prev, 0);
737 else if (prev->cursp != stacklevel
738 && prev->stack->usecnt > 1)
739 {
740 prev->gencnt = ++prev->stack->gencnt;
741 prev->stack->usecnt = 1;
742 }
743
744 /* has our stack been invalidated? */
745 if (next->stack && next->stack->gencnt != next->gencnt)
746 {
747 deallocate_stack (next);
748 allocate_stack (next, 1);
749 coro_create (&(next->stack->cctx),
750 continue_coro, (void *)next,
751 next->stack->sptr, labs (next->stack->ssize));
752 }
753
754 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
755 prev->cursp = stacklevel;
756 /* don't add any code here */
757 }
758 else
759 next->cursp = stacklevel;
760 } 755 }
761 else if (next->tmps_ix == -2) 756
762 croak ("tried to transfer to running coroutine"); 757 /*TODO: must not croak here */
758 if (!prev->flags & CF_RUNNING)
759 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
760
761 if (next->flags & CF_RUNNING)
762 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
763
764 if (next->flags & CF_DESTROYED)
765 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
766
767 prev->flags &= ~CF_RUNNING;
768 next->flags |= CF_RUNNING;
769
770 LOCK;
771
772 if (next->flags & CF_NEW)
773 {
774 /* need to start coroutine */
775 next->flags &= ~CF_NEW;
776 /* first get rid of the old state */
777 save_perl (prev);
778 /* setup coroutine call */
779 setup_coro (next);
780 /* need a new stack */
781 assert (!next->cctx);
782 }
763 else 783 else
764 { 784 {
765 LOCK; 785 /* coroutine already started */
766 SAVE (prev, -1); /* first get rid of the old state */ 786 save_perl (prev);
767 UNLOCK; 787 load_perl (next);
768
769 if (flags & TRANSFER_SAVE_CCTXT)
770 {
771 if (!prev->stack)
772 allocate_stack (prev, 0);
773
774 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
775 {
776 PL_top_env = &next->start_env;
777
778 setup_coro (next);
779 next->cursp = stacklevel;
780
781 prev->stack->refcnt++;
782 prev->stack->usecnt++;
783 next->stack = prev->stack;
784 next->gencnt = prev->gencnt;
785 }
786 else
787 {
788 assert (!next->stack);
789 allocate_stack (next, 1);
790 coro_create (&(next->stack->cctx),
791 setup_coro, (void *)next,
792 next->stack->sptr, labs (next->stack->ssize));
793 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
794 prev->cursp = stacklevel;
795 /* don't add any code here */
796 }
797 }
798 else
799 {
800 setup_coro (next);
801 next->cursp = stacklevel;
802 }
803 } 788 }
804 }
805 789
806 LOCK; 790 prev__cctx = prev->cctx;
807 if (coro_mortal) 791
808 { 792 /* possibly "free" the cctx */
809 SvREFCNT_dec (coro_mortal); 793 if (prev__cctx->idle_sp == STACKLEVEL)
794 {
795 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
796 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
797
798 prev->cctx = 0;
799
800 cctx_put (prev__cctx);
801 prev__cctx->inuse = 0;
802 }
803
804 if (!next->cctx)
805 {
806 next->cctx = cctx_get ();
807 assert (!next->cctx->inuse);
808 next->cctx->inuse = 1;
809 }
810
811 if (prev__cctx != next->cctx)
812 {
813 prev__cctx->top_env = PL_top_env;
814 PL_top_env = next->cctx->top_env;
815 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
816 }
817
810 coro_mortal = 0; 818 free_coro_mortal ();
811 }
812 UNLOCK; 819 UNLOCK;
820 }
813} 821}
814 822
815#define SV_CORO(sv,func) \ 823struct transfer_args
816 do { \ 824{
817 if (SvROK (sv)) \ 825 struct coro *prev, *next;
818 sv = SvRV (sv); \ 826};
819 \
820 if (SvTYPE (sv) == SVt_PVHV) \
821 { \
822 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
823 \
824 if (!he) \
825 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
826 \
827 (sv) = SvRV (HeVAL(he)); \
828 } \
829 \
830 /* must also be changed inside Coro::Cont::yield */ \
831 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
832 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
833 \
834 } while(0)
835 827
836#define SvSTATE(sv) (struct coro *)SvIV (sv) 828#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
837 829
830/** high level stuff ********************************************************/
831
838static void 832static int
833coro_state_destroy (struct coro *coro)
834{
835 if (coro->flags & CF_DESTROYED)
836 return 0;
837
838 coro->flags |= CF_DESTROYED;
839
840 if (coro->flags & CF_READY)
841 {
842 /* reduce nready, as destroying a ready coro effectively unreadies it */
843 /* alternative: look through all ready queues and remove it */
844 LOCK;
845 --coro_nready;
846 UNLOCK;
847 }
848 else
849 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
850
851 if (coro->mainstack && coro->mainstack != main_mainstack)
852 {
853 assert (!(coro->flags & CF_RUNNING));
854
855 struct coro temp;
856 Zero (&temp, 1, struct coro);
857 temp.save = CORO_SAVE_ALL;
858
859 if (coro->flags & CF_RUNNING)
860 croak ("FATAL: tried to destroy currently running coroutine");
861
862 save_perl (&temp);
863 load_perl (coro);
864
865 coro_destroy_stacks ();
866
867 load_perl (&temp); /* this will get rid of defsv etc.. */
868
869 coro->mainstack = 0;
870 }
871
872 cctx_destroy (coro->cctx);
873 SvREFCNT_dec (coro->args);
874
875 return 1;
876}
877
878static int
879coro_state_free (pTHX_ SV *sv, MAGIC *mg)
880{
881 struct coro *coro = (struct coro *)mg->mg_ptr;
882 mg->mg_ptr = 0;
883
884 if (--coro->refcnt < 0)
885 {
886 coro_state_destroy (coro);
887 Safefree (coro);
888 }
889
890 return 0;
891}
892
893static int
894coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
895{
896 struct coro *coro = (struct coro *)mg->mg_ptr;
897
898 ++coro->refcnt;
899
900 return 0;
901}
902
903static MGVTBL coro_state_vtbl = {
904 0, 0, 0, 0,
905 coro_state_free,
906 0,
907#ifdef MGf_DUP
908 coro_state_dup,
909#else
910# define MGf_DUP 0
911#endif
912};
913
914static struct coro *
915SvSTATE (SV *coro)
916{
917 HV *stash;
918 MAGIC *mg;
919
920 if (SvROK (coro))
921 coro = SvRV (coro);
922
923 stash = SvSTASH (coro);
924 if (stash != coro_stash && stash != coro_state_stash)
925 {
926 /* very slow, but rare, check */
927 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
928 croak ("Coro::State object required");
929 }
930
931 mg = SvMAGIC (coro);
932 assert (mg->mg_type == PERL_MAGIC_ext);
933 return (struct coro *)mg->mg_ptr;
934}
935
936static void
937prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
938{
939 ta->prev = SvSTATE (prev_sv);
940 ta->next = SvSTATE (next_sv);
941}
942
943static void
839api_transfer(pTHX_ SV *prev, SV *next, int flags) 944api_transfer (SV *prev_sv, SV *next_sv)
840{ 945{
841 SV_CORO (prev, "Coro::transfer"); 946 struct transfer_args ta;
842 SV_CORO (next, "Coro::transfer");
843 947
844 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 948 prepare_transfer (&ta, prev_sv, next_sv);
949 TRANSFER (ta);
950}
951
952static int
953api_save (SV *coro_sv, int new_save)
954{
955 struct coro *coro = SvSTATE (coro_sv);
956 int old_save = coro->save;
957
958 if (new_save >= 0)
959 coro->save = new_save;
960
961 return old_save;
845} 962}
846 963
847/** Coro ********************************************************************/ 964/** Coro ********************************************************************/
848 965
849#define PRIO_MAX 3
850#define PRIO_HIGH 1
851#define PRIO_NORMAL 0
852#define PRIO_LOW -1
853#define PRIO_IDLE -3
854#define PRIO_MIN -4
855
856/* for Coro.pm */
857static GV *coro_current, *coro_idle;
858static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
859static int coro_nready;
860
861static void 966static void
862coro_enq (pTHX_ SV *sv) 967coro_enq (SV *coro_sv)
863{ 968{
864 if (SvTYPE (sv) == SVt_PVHV)
865 {
866 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
867 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
868
869 prio = prio > PRIO_MAX ? PRIO_MAX
870 : prio < PRIO_MIN ? PRIO_MIN
871 : prio;
872
873 av_push (coro_ready [prio - PRIO_MIN], sv); 969 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
874 coro_nready++;
875
876 return;
877 }
878
879 croak ("Coro::ready tried to enqueue something that is not a coroutine");
880} 970}
881 971
882static SV * 972static SV *
883coro_deq (pTHX_ int min_prio) 973coro_deq (int min_prio)
884{ 974{
885 int prio = PRIO_MAX - PRIO_MIN; 975 int prio = PRIO_MAX - PRIO_MIN;
886 976
887 min_prio -= PRIO_MIN; 977 min_prio -= PRIO_MIN;
888 if (min_prio < 0) 978 if (min_prio < 0)
889 min_prio = 0; 979 min_prio = 0;
890 980
891 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 981 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
892 if (av_len (coro_ready[prio]) >= 0) 982 if (AvFILLp (coro_ready [prio]) >= 0)
893 {
894 coro_nready--;
895 return av_shift (coro_ready[prio]); 983 return av_shift (coro_ready [prio]);
896 }
897 984
898 return 0; 985 return 0;
899} 986}
900 987
901static void 988static int
902api_ready (SV *coro) 989api_ready (SV *coro_sv)
903{ 990{
904 dTHX; 991 struct coro *coro;
905 992
906 if (SvROK (coro)) 993 if (SvROK (coro_sv))
907 coro = SvRV (coro); 994 coro_sv = SvRV (coro_sv);
995
996 coro = SvSTATE (coro_sv);
997
998 if (coro->flags & CF_READY)
999 return 0;
1000
1001 coro->flags |= CF_READY;
908 1002
909 LOCK; 1003 LOCK;
910 coro_enq (aTHX_ SvREFCNT_inc (coro)); 1004 coro_enq (SvREFCNT_inc (coro_sv));
1005 ++coro_nready;
911 UNLOCK; 1006 UNLOCK;
1007
1008 return 1;
1009}
1010
1011static int
1012api_is_ready (SV *coro_sv)
1013{
1014 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1015}
1016
1017static void
1018prepare_schedule (struct transfer_args *ta)
1019{
1020 SV *prev_sv, *next_sv;
1021
1022 for (;;)
1023 {
1024 LOCK;
1025 next_sv = coro_deq (PRIO_MIN);
1026
1027 /* nothing to schedule: call the idle handler */
1028 if (!next_sv)
1029 {
1030 UNLOCK;
1031 dSP;
1032
1033 ENTER;
1034 SAVETMPS;
1035
1036 PUSHMARK (SP);
1037 PUTBACK;
1038 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1039
1040 FREETMPS;
1041 LEAVE;
1042 continue;
1043 }
1044
1045 ta->next = SvSTATE (next_sv);
1046
1047 /* cannot transfer to destroyed coros, skip and look for next */
1048 if (ta->next->flags & CF_DESTROYED)
1049 {
1050 UNLOCK;
1051 SvREFCNT_dec (next_sv);
1052 /* coro_nready is already taken care of by destroy */
1053 continue;
1054 }
1055
1056 --coro_nready;
1057 UNLOCK;
1058 break;
1059 }
1060
1061 /* free this only after the transfer */
1062 prev_sv = SvRV (coro_current);
1063 SvRV_set (coro_current, next_sv);
1064 ta->prev = SvSTATE (prev_sv);
1065
1066 assert (ta->next->flags & CF_READY);
1067 ta->next->flags &= ~CF_READY;
1068
1069 LOCK;
1070 free_coro_mortal ();
1071 coro_mortal = prev_sv;
1072 UNLOCK;
1073}
1074
1075static void
1076prepare_cede (struct transfer_args *ta)
1077{
1078 api_ready (coro_current);
1079 prepare_schedule (ta);
1080}
1081
1082static int
1083prepare_cede_notself (struct transfer_args *ta)
1084{
1085 if (coro_nready)
1086 {
1087 SV *prev = SvRV (coro_current);
1088 prepare_schedule (ta);
1089 api_ready (prev);
1090 return 1;
1091 }
1092 else
1093 return 0;
912} 1094}
913 1095
914static void 1096static void
915api_schedule (void) 1097api_schedule (void)
916{ 1098{
917 dTHX; 1099 struct transfer_args ta;
918 1100
919 SV *prev, *next; 1101 prepare_schedule (&ta);
920 1102 TRANSFER (ta);
921 LOCK;
922
923 prev = SvRV (GvSV (coro_current));
924 next = coro_deq (aTHX_ PRIO_MIN);
925
926 if (!next)
927 next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
928
929 /* free this only after the transfer */
930 coro_mortal = prev;
931 SV_CORO (prev, "Coro::schedule");
932
933 SvRV (GvSV (coro_current)) = next;
934
935 SV_CORO (next, "Coro::schedule");
936
937 UNLOCK;
938
939 transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
940 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
941} 1103}
942 1104
943static void 1105static int
944api_cede (void) 1106api_cede (void)
945{ 1107{
946 dTHX; 1108 struct transfer_args ta;
947 1109
948 LOCK; 1110 prepare_cede (&ta);
949 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
950 UNLOCK;
951 1111
952 api_schedule (); 1112 if (ta.prev != ta.next)
1113 {
1114 TRANSFER (ta);
1115 return 1;
1116 }
1117 else
1118 return 0;
1119}
1120
1121static int
1122api_cede_notself (void)
1123{
1124 struct transfer_args ta;
1125
1126 if (prepare_cede_notself (&ta))
1127 {
1128 TRANSFER (ta);
1129 return 1;
1130 }
1131 else
1132 return 0;
953} 1133}
954 1134
955MODULE = Coro::State PACKAGE = Coro::State 1135MODULE = Coro::State PACKAGE = Coro::State
956 1136
957PROTOTYPES: ENABLE 1137PROTOTYPES: DISABLE
958 1138
959BOOT: 1139BOOT:
960{ /* {} necessary for stoopid perl-5.6.x */ 1140{
961#ifdef USE_ITHREADS 1141#ifdef USE_ITHREADS
962 MUTEX_INIT (&coro_mutex); 1142 MUTEX_INIT (&coro_mutex);
963#endif 1143#endif
1144 BOOT_PAGESIZE;
964 1145
965 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
966 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
967 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1146 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
968 1147
969 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1148 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
970 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1149 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
971 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1150 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1151 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
972 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1152 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
973 1153
974 main_mainstack = PL_mainstack; 1154 main_mainstack = PL_mainstack;
975 1155
976 coroapi.ver = CORO_API_VERSION; 1156 coroapi.ver = CORO_API_VERSION;
977 coroapi.transfer = api_transfer; 1157 coroapi.transfer = api_transfer;
978}
979 1158
980Coro::State 1159 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
981_newprocess(args) 1160}
982 SV * args 1161
983 PROTOTYPE: $ 1162SV *
1163new (char *klass, ...)
984 CODE: 1164 CODE:
985 Coro__State coro; 1165{
1166 struct coro *coro;
1167 HV *hv;
1168 int i;
986 1169
987 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
988 croak ("Coro::State::_newprocess expects an arrayref");
989
990 Newz (0, coro, 1, struct coro); 1170 Newz (0, coro, 1, struct coro);
1171 coro->args = newAV ();
1172 coro->save = CORO_SAVE_ALL;
1173 coro->flags = CF_NEW;
991 1174
992 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1175 hv = newHV ();
993 /*coro->mainstack = 0; *//*actual work is done inside transfer */ 1176 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
994 /*coro->stack = 0;*/ 1177 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
995 1178
996 /* same as JMPENV_BOOTSTRAP */ 1179 for (i = 1; i < items; i++)
997 /* we might be able to recycle start_env, but safe is safe */ 1180 av_push (coro->args, newSVsv (ST (i)));
998 /*Zero(&coro->start_env, 1, JMPENV);*/ 1181}
999 coro->start_env.je_ret = -1;
1000 coro->start_env.je_mustcatch = TRUE;
1001
1002 RETVAL = coro;
1003 OUTPUT: 1182 OUTPUT:
1004 RETVAL 1183 RETVAL
1005 1184
1185int
1186save (SV *coro, int new_save = -1)
1187 CODE:
1188 RETVAL = api_save (coro, new_save);
1189 OUTPUT:
1190 RETVAL
1191
1006void 1192void
1007transfer(prev, next, flags) 1193_set_stacklevel (...)
1008 SV *prev 1194 ALIAS:
1009 SV *next 1195 Coro::State::transfer = 1
1010 int flags 1196 Coro::schedule = 2
1011 PROTOTYPE: @ 1197 Coro::cede = 3
1198 Coro::cede_notself = 4
1012 CODE: 1199 CODE:
1013 PUTBACK; 1200{
1014 SV_CORO (next, "Coro::transfer"); 1201 struct transfer_args ta;
1015 SV_CORO (prev, "Coro::transfer"); 1202
1016 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1203 switch (ix)
1017 SPAGAIN; 1204 {
1205 case 0:
1206 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1207 ta.next = 0;
1208 break;
1209
1210 case 1:
1211 if (items != 2)
1212 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1213
1214 prepare_transfer (&ta, ST (0), ST (1));
1215 break;
1216
1217 case 2:
1218 prepare_schedule (&ta);
1219 break;
1220
1221 case 3:
1222 prepare_cede (&ta);
1223 break;
1224
1225 case 4:
1226 if (!prepare_cede_notself (&ta))
1227 XSRETURN_EMPTY;
1228
1229 break;
1230 }
1231
1232 BARRIER;
1233 TRANSFER (ta);
1234
1235 if (GIMME_V != G_VOID && ta.next != ta.prev)
1236 XSRETURN_YES;
1237}
1238
1239bool
1240_destroy (SV *coro_sv)
1241 CODE:
1242 RETVAL = coro_state_destroy (SvSTATE (coro_sv));
1243 OUTPUT:
1244 RETVAL
1018 1245
1019void 1246void
1020DESTROY(coro)
1021 Coro::State coro
1022 CODE:
1023
1024 if (coro->mainstack && coro->mainstack != main_mainstack)
1025 {
1026 struct coro temp;
1027
1028 PUTBACK;
1029 SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
1030 LOAD (aTHX_ coro);
1031 SPAGAIN;
1032
1033 destroy_stacks (aTHX);
1034
1035 LOAD ((&temp)); /* this will get rid of defsv etc.. */
1036 SPAGAIN;
1037
1038 coro->mainstack = 0;
1039 }
1040
1041 deallocate_stack (coro);
1042 SvREFCNT_dec (coro->args);
1043 Safefree (coro);
1044
1045void
1046_exit(code) 1247_exit (code)
1047 int code 1248 int code
1048 PROTOTYPE: $ 1249 PROTOTYPE: $
1049 CODE: 1250 CODE:
1050 _exit (code); 1251 _exit (code);
1051 1252
1052MODULE = Coro::State PACKAGE = Coro::Cont 1253int
1254cctx_count ()
1255 CODE:
1256 RETVAL = cctx_count;
1257 OUTPUT:
1258 RETVAL
1053 1259
1054# this is slightly dirty (should expose a c-level api) 1260int
1055 1261cctx_idle ()
1056void 1262 CODE:
1057yield(...) 1263 RETVAL = cctx_idle;
1058 PROTOTYPE: @ 1264 OUTPUT:
1059 CODE: 1265 RETVAL
1060 SV *yieldstack;
1061 SV *sv;
1062 AV *defav = GvAV (PL_defgv);
1063 struct coro *prev, *next;
1064
1065 yieldstack = *hv_fetch (
1066 (HV *)SvRV (GvSV (coro_current)),
1067 "yieldstack", sizeof ("yieldstack") - 1,
1068 0
1069 );
1070
1071 /* set up @_ -- ugly */
1072 av_clear (defav);
1073 av_fill (defav, items - 1);
1074 while (items--)
1075 av_store (defav, items, SvREFCNT_inc (ST(items)));
1076
1077 sv = av_pop ((AV *)SvRV (yieldstack));
1078 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1079 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1080 SvREFCNT_dec (sv);
1081
1082 transfer (aTHX_ prev, next, 0);
1083 1266
1084MODULE = Coro::State PACKAGE = Coro 1267MODULE = Coro::State PACKAGE = Coro
1085 1268
1086# this is slightly dirty (should expose a c-level api)
1087
1088BOOT: 1269BOOT:
1089{ 1270{
1090 int i; 1271 int i;
1272
1091 HV *stash = gv_stashpv ("Coro", TRUE); 1273 coro_stash = gv_stashpv ("Coro", TRUE);
1092 1274
1093 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1275 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1094 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1276 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1095 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1277 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1096 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1278 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1097 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1279 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1098 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1280 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1099 1281
1100 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV); 1282 coro_current = get_sv ("Coro::current", FALSE);
1101 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV); 1283 SvREADONLY_on (coro_current);
1102 1284
1103 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1285 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1104 coro_ready[i] = newAV (); 1286 coro_ready[i] = newAV ();
1105 1287
1106 { 1288 {
1107 SV *sv = perl_get_sv("Coro::API", 1); 1289 SV *sv = perl_get_sv("Coro::API", 1);
1108 1290
1109 coroapi.schedule = api_schedule; 1291 coroapi.schedule = api_schedule;
1292 coroapi.save = api_save;
1110 coroapi.cede = api_cede; 1293 coroapi.cede = api_cede;
1294 coroapi.cede_notself = api_cede_notself;
1111 coroapi.ready = api_ready; 1295 coroapi.ready = api_ready;
1296 coroapi.is_ready = api_is_ready;
1112 coroapi.nready = &coro_nready; 1297 coroapi.nready = &coro_nready;
1113 coroapi.current = coro_current; 1298 coroapi.current = coro_current;
1114 1299
1115 GCoroAPI = &coroapi; 1300 GCoroAPI = &coroapi;
1116 sv_setiv(sv, (IV)&coroapi); 1301 sv_setiv (sv, (IV)&coroapi);
1117 SvREADONLY_on(sv); 1302 SvREADONLY_on (sv);
1118 } 1303 }
1119} 1304}
1120 1305
1121#if !PERL_MICRO
1122
1123void 1306void
1124ready(self) 1307_set_current (SV *current)
1125 SV * self
1126 PROTOTYPE: $ 1308 PROTOTYPE: $
1127 CODE: 1309 CODE:
1128 api_ready (self); 1310 SvREFCNT_dec (SvRV (coro_current));
1129 1311 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1130#endif
1131 1312
1132int 1313int
1314prio (Coro::State coro, int newprio = 0)
1315 ALIAS:
1316 nice = 1
1317 CODE:
1318{
1319 RETVAL = coro->prio;
1320
1321 if (items > 1)
1322 {
1323 if (ix)
1324 newprio = coro->prio - newprio;
1325
1326 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1327 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1328
1329 coro->prio = newprio;
1330 }
1331}
1332 OUTPUT:
1333 RETVAL
1334
1335SV *
1336ready (SV *self)
1337 PROTOTYPE: $
1338 CODE:
1339 RETVAL = boolSV (api_ready (self));
1340 OUTPUT:
1341 RETVAL
1342
1343SV *
1344is_ready (SV *self)
1345 PROTOTYPE: $
1346 CODE:
1347 RETVAL = boolSV (api_is_ready (self));
1348 OUTPUT:
1349 RETVAL
1350
1351int
1133nready(...) 1352nready (...)
1134 PROTOTYPE: 1353 PROTOTYPE:
1135 CODE: 1354 CODE:
1136 RETVAL = coro_nready; 1355 RETVAL = coro_nready;
1137 OUTPUT: 1356 OUTPUT:
1138 RETVAL 1357 RETVAL
1139 1358
1140void 1359MODULE = Coro::State PACKAGE = Coro::AIO
1141schedule(...) 1360
1142 PROTOTYPE: 1361SV *
1362_get_state ()
1143 CODE: 1363 CODE:
1144 api_schedule ();
1145
1146void
1147cede(...)
1148 PROTOTYPE:
1149 CODE:
1150 api_cede ();
1151
1152# and these are hacks
1153SV *
1154_aio_get_state ()
1155 CODE:
1156{ 1364{
1157 struct { 1365 struct io_state *data;
1158 int errorno;
1159 int laststype;
1160 int laststatval;
1161 Stat_t statcache;
1162 } data;
1163 1366
1367 RETVAL = newSV (sizeof (struct io_state));
1368 data = (struct io_state *)SvPVX (RETVAL);
1369 SvCUR_set (RETVAL, sizeof (struct io_state));
1370 SvPOK_only (RETVAL);
1371
1164 data.errorno = errno; 1372 data->errorno = errno;
1165 data.laststype = PL_laststype; 1373 data->laststype = PL_laststype;
1166 data.laststatval = PL_laststatval; 1374 data->laststatval = PL_laststatval;
1167 data.statcache = PL_statcache; 1375 data->statcache = PL_statcache;
1168
1169 RETVAL = newSVpvn ((char *)&data, sizeof data);
1170} 1376}
1171 OUTPUT: 1377 OUTPUT:
1172 RETVAL 1378 RETVAL
1173 1379
1174void 1380void
1175_aio_set_state (char *data_) 1381_set_state (char *data_)
1176 PROTOTYPE: $ 1382 PROTOTYPE: $
1177 CODE: 1383 CODE:
1178{ 1384{
1179 struct { 1385 struct io_state *data = (void *)data_;
1180 int errorno;
1181 int laststype;
1182 int laststatval;
1183 Stat_t statcache;
1184 } *data = (void *)data_;
1185 1386
1186 errno = data->errorno; 1387 errno = data->errorno;
1187 PL_laststype = data->laststype; 1388 PL_laststype = data->laststype;
1188 PL_laststatval = data->laststatval; 1389 PL_laststatval = data->laststatval;
1189 PL_statcache = data->statcache; 1390 PL_statcache = data->statcache;
1190} 1391}
1392

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