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Comparing Coro/Coro/State.xs (file contents):
Revision 1.59 by root, Mon Jul 19 01:32:27 2004 UTC vs.
Revision 1.142 by root, Tue Feb 13 19:21:29 2007 UTC

1#define PERL_NO_GET_CONTEXT 1#include "libcoro/coro.c"
2 2
3#include "EXTERN.h" 3#include "EXTERN.h"
4#include "perl.h" 4#include "perl.h"
5#include "XSUB.h" 5#include "XSUB.h"
6 6
7#include "patchlevel.h" 7#include "patchlevel.h"
8 8
9#if PATCHLEVEL < 6 9#include <stdio.h>
10#include <errno.h>
11#include <assert.h>
12
13#ifdef HAVE_MMAP
14# include <unistd.h>
15# include <sys/mman.h>
16# ifndef MAP_ANONYMOUS
17# ifdef MAP_ANON
18# define MAP_ANONYMOUS MAP_ANON
19# else
20# undef HAVE_MMAP
21# endif
22# endif
23# include <limits.h>
24# ifndef PAGESIZE
25# define PAGESIZE pagesize
26# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
27static long pagesize;
28# else
29# define BOOT_PAGESIZE (void)0
30# endif
31#else
32# define PAGESIZE 0
33# define BOOT_PAGESIZE (void)0
34#endif
35
36#if USE_VALGRIND
37# include <valgrind/valgrind.h>
38# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
39#else
40# define REGISTER_STACK(cctx,start,end)
41#endif
42
43/* the maximum number of idle cctx that will be pooled */
44#define MAX_IDLE_CCTX 8
45
46#define PERL_VERSION_ATLEAST(a,b,c) \
47 (PERL_REVISION > (a) \
48 || (PERL_REVISION == (a) \
49 && (PERL_VERSION > (b) \
50 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
51
52#if !PERL_VERSION_ATLEAST (5,6,0)
10# ifndef PL_ppaddr 53# ifndef PL_ppaddr
11# define PL_ppaddr ppaddr 54# define PL_ppaddr ppaddr
12# endif 55# endif
13# ifndef call_sv 56# ifndef call_sv
14# define call_sv perl_call_sv 57# define call_sv perl_call_sv
… …
25# ifndef IS_PADCONST 68# ifndef IS_PADCONST
26# define IS_PADCONST(v) 0 69# define IS_PADCONST(v) 0
27# endif 70# endif
28#endif 71#endif
29 72
30#include "libcoro/coro.c" 73/* 5.8.7 */
31 74#ifndef SvRV_set
32#include <signal.h> 75# define SvRV_set(s,v) SvRV(s) = (v)
33
34#ifdef HAVE_MMAP
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 76#endif
44#endif
45 77
46#define SUB_INIT "Coro::State::initialize" 78#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
47#define UCORO_STATE "_coro_state" 79# undef STACKGUARD
80#endif
81
82#ifndef STACKGUARD
83# define STACKGUARD 0
84#endif
85
86/* prefer perl internal functions over our own? */
87#ifndef PREFER_PERL_FUNCTIONS
88# define PREFER_PERL_FUNCTIONS 0
89#endif
48 90
49/* The next macro should declare a variable stacklevel that contains and approximation 91/* 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 92 * to the current C stack pointer. Its property is that it changes with each call
51 * and should be unique. */ 93 * and should be unique. */
94#define dSTACKLEVEL int stacklevel
52#define dSTACKLEVEL void *stacklevel = &stacklevel 95#define STACKLEVEL ((void *)&stacklevel)
53 96
54#define IN_DESTRUCT (PL_main_cv == Nullcv) 97#define IN_DESTRUCT (PL_main_cv == Nullcv)
55 98
56#define labs(l) ((l) >= 0 ? (l) : -(l)) 99#if __GNUC__ >= 3
100# define attribute(x) __attribute__(x)
101# define BARRIER __asm__ __volatile__ ("" : : : "memory")
102#else
103# define attribute(x)
104# define BARRIER
105#endif
106
107#define NOINLINE attribute ((noinline))
57 108
58#include "CoroAPI.h" 109#include "CoroAPI.h"
59 110
60#ifdef USE_ITHREADS 111#ifdef USE_ITHREADS
61static perl_mutex coro_mutex; 112static perl_mutex coro_mutex;
62# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0) 113# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0) 114# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
64#else 115#else
65# define LOCK 0 116# define LOCK (void)0
66# define UNLOCK 0 117# define UNLOCK (void)0
67#endif 118#endif
119
120/* helper storage struct for Coro::AIO */
121struct io_state
122{
123 int errorno;
124 I32 laststype;
125 int laststatval;
126 Stat_t statcache;
127};
68 128
69static struct CoroAPI coroapi; 129static struct CoroAPI coroapi;
70static AV *main_mainstack; /* used to differentiate between $main and others */ 130static AV *main_mainstack; /* used to differentiate between $main and others */
71static HV *coro_state_stash; 131static 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 */ 132static SV *coro_mortal; /* will be freed after next transfer */
75 133
76/* this is actually not only the c stack but also c registers etc... */ 134static struct coro_cctx *cctx_first;
135static int cctx_count, cctx_idle;
136
137/* this is a structure representing a c-level coroutine */
77typedef struct { 138typedef struct coro_cctx {
78 int refcnt; /* pointer reference counter */ 139 struct coro_cctx *next;
79 int usecnt; /* shared by how many coroutines */
80 int gencnt; /* generation counter */
81 140
141 /* the stack */
142 void *sptr;
143 ssize_t ssize; /* positive == mmap, otherwise malloc */
144
145 /* cpu state */
146 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
147 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
148 JMPENV *top_env;
82 coro_context cctx; 149 coro_context cctx;
83 150
84 void *sptr; 151 int inuse;
85 long ssize; /* positive == mmap, otherwise malloc */
86} coro_stack;
87 152
153#if USE_VALGRIND
154 int valgrind_id;
155#endif
156} coro_cctx;
157
158enum {
159 CF_RUNNING = 0x0001, /* coroutine is running */
160 CF_READY = 0x0002, /* coroutine is ready */
161 CF_NEW = 0x0004, /* has never been switched to */
162 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
163};
164
165/* this is a structure representing a perl-level coroutine */
88struct coro { 166struct coro {
89 /* the top-level JMPENV for each coroutine, needed to catch dies. */ 167 /* the c coroutine allocated to this perl coroutine, if any */
90 JMPENV start_env; 168 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 SV **stack_base;
115 SV **stack_max;
116 SV **tmps_stack;
117 I32 tmps_floor;
118 I32 tmps_ix;
119 I32 tmps_max;
120 I32 *markstack;
121 I32 *markstack_ptr;
122 I32 *markstack_max;
123 I32 *scopestack;
124 I32 scopestack_ix;
125 I32 scopestack_max;
126 ANY *savestack;
127 I32 savestack_ix;
128 I32 savestack_max;
129 OP **retstack;
130 I32 retstack_ix;
131 I32 retstack_max;
132 COP *curcop;
133 JMPENV *top_env;
134 169
135 /* data associated with this coroutine (initial args) */ 170 /* data associated with this coroutine (initial args) */
136 AV *args; 171 AV *args;
172 int refcnt;
173 int save; /* CORO_SAVE flags */
174 int flags; /* CF_ flags */
175
176 /* optionally saved, might be zero */
177 AV *defav; /* @_ */
178 SV *defsv; /* $_ */
179 SV *errsv; /* $@ */
180 SV *irssv; /* $/ */
181 SV *irssv_sv; /* real $/ cache */
182
183#define VAR(name,type) type name;
184# include "state.h"
185#undef VAR
186
187 /* coro process data */
188 int prio;
137}; 189};
138 190
139typedef struct coro *Coro__State; 191typedef struct coro *Coro__State;
140typedef struct coro *Coro__State_or_hashref; 192typedef struct coro *Coro__State_or_hashref;
141 193
142/* mostly copied from op.c:cv_clone2 */ 194/** Coro ********************************************************************/
143STATIC AV * 195
144clone_padlist (pTHX_ AV *protopadlist) 196#define PRIO_MAX 3
197#define PRIO_HIGH 1
198#define PRIO_NORMAL 0
199#define PRIO_LOW -1
200#define PRIO_IDLE -3
201#define PRIO_MIN -4
202
203/* for Coro.pm */
204static SV *coro_current;
205static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
206static int coro_nready;
207
208/** lowlevel stuff **********************************************************/
209
210static AV *
211coro_clone_padlist (CV *cv)
145{ 212{
146 AV *av; 213 AV *padlist = CvPADLIST (cv);
147 I32 ix;
148 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
149 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
150 SV **pname = AvARRAY (protopad_name);
151 SV **ppad = AvARRAY (protopad);
152 I32 fname = AvFILLp (protopad_name);
153 I32 fpad = AvFILLp (protopad);
154 AV *newpadlist, *newpad_name, *newpad; 214 AV *newpadlist, *newpad;
155 SV **npad;
156
157 newpad_name = newAV ();
158 for (ix = fname; ix >= 0; ix--)
159 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
160
161 newpad = newAV ();
162 av_fill (newpad, AvFILLp (protopad));
163 npad = AvARRAY (newpad);
164 215
165 newpadlist = newAV (); 216 newpadlist = newAV ();
166 AvREAL_off (newpadlist); 217 AvREAL_off (newpadlist);
167 av_store (newpadlist, 0, (SV *) newpad_name); 218#if PERL_VERSION_ATLEAST (5,9,0)
219 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
220#else
221 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
222#endif
223 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
224 --AvFILLp (padlist);
225
226 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
168 av_store (newpadlist, 1, (SV *) newpad); 227 av_store (newpadlist, 1, (SV *)newpad);
169
170 av = newAV (); /* will be @_ */
171 av_extend (av, 0);
172 av_store (newpad, 0, (SV *) av);
173 AvFLAGS (av) = AVf_REIFY;
174
175 for (ix = fpad; ix > 0; ix--)
176 {
177 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
178
179 if (namesv && namesv != &PL_sv_undef)
180 {
181 char *name = SvPVX (namesv); /* XXX */
182
183 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
184 { /* lexical from outside? */
185 npad[ix] = SvREFCNT_inc (ppad[ix]);
186 }
187 else
188 { /* our own lexical */
189 SV *sv;
190 if (*name == '&')
191 sv = SvREFCNT_inc (ppad[ix]);
192 else if (*name == '@')
193 sv = (SV *) newAV ();
194 else if (*name == '%')
195 sv = (SV *) newHV ();
196 else
197 sv = NEWSV (0, 0);
198
199#ifdef SvPADBUSY
200 if (!SvPADBUSY (sv))
201#endif
202 SvPADMY_on (sv);
203
204 npad[ix] = sv;
205 }
206 }
207 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
208 {
209 npad[ix] = SvREFCNT_inc (ppad[ix]);
210 }
211 else
212 {
213 SV *sv = NEWSV (0, 0);
214 SvPADTMP_on (sv);
215 npad[ix] = sv;
216 }
217 }
218
219#if 0 /* return -ENOTUNDERSTOOD */
220 /* Now that vars are all in place, clone nested closures. */
221
222 for (ix = fpad; ix > 0; ix--) {
223 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
224 if (namesv
225 && namesv != &PL_sv_undef
226 && !(SvFLAGS(namesv) & SVf_FAKE)
227 && *SvPVX(namesv) == '&'
228 && CvCLONE(ppad[ix]))
229 {
230 CV *kid = cv_clone((CV*)ppad[ix]);
231 SvREFCNT_dec(ppad[ix]);
232 CvCLONE_on(kid);
233 SvPADMY_on(kid);
234 npad[ix] = (SV*)kid;
235 }
236 }
237#endif
238 228
239 return newpadlist; 229 return newpadlist;
240} 230}
241 231
242STATIC void 232static void
243free_padlist (pTHX_ AV *padlist) 233free_padlist (AV *padlist)
244{ 234{
245 /* may be during global destruction */ 235 /* may be during global destruction */
246 if (SvREFCNT (padlist)) 236 if (SvREFCNT (padlist))
247 { 237 {
248 I32 i = AvFILLp (padlist); 238 I32 i = AvFILLp (padlist);
… …
261 251
262 SvREFCNT_dec ((SV*)padlist); 252 SvREFCNT_dec ((SV*)padlist);
263 } 253 }
264} 254}
265 255
266STATIC int 256static int
267coro_cv_free (pTHX_ SV *sv, MAGIC *mg) 257coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
268{ 258{
269 AV *padlist; 259 AV *padlist;
270 AV *av = (AV *)mg->mg_obj; 260 AV *av = (AV *)mg->mg_obj;
271 261
272 /* casting is fun. */ 262 /* casting is fun. */
273 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av))) 263 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
274 free_padlist (aTHX_ padlist); 264 free_padlist (padlist);
265
266 SvREFCNT_dec (av);
267
268 return 0;
275} 269}
276 270
277#define PERL_MAGIC_coro PERL_MAGIC_ext 271#define PERL_MAGIC_coro PERL_MAGIC_ext
278 272
279static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free}; 273static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
280 274
275#define CORO_MAGIC(cv) \
276 SvMAGIC (cv) \
277 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
278 ? SvMAGIC (cv) \
279 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
280 : 0
281
281/* the next two functions merely cache the padlists */ 282/* the next two functions merely cache the padlists */
282STATIC void 283static void
283get_padlist (pTHX_ CV *cv) 284get_padlist (CV *cv)
284{ 285{
285 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 286 MAGIC *mg = CORO_MAGIC (cv);
287 AV *av;
286 288
287 if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0) 289 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
288 CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj); 290 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
289 else 291 else
292 {
293#if PREFER_PERL_FUNCTIONS
294 /* this is probably cleaner, but also slower? */
295 CV *cp = Perl_cv_clone (cv);
296 CvPADLIST (cv) = CvPADLIST (cp);
297 CvPADLIST (cp) = 0;
298 SvREFCNT_dec (cp);
299#else
290 CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv)); 300 CvPADLIST (cv) = coro_clone_padlist (cv);
301#endif
302 }
291} 303}
292 304
293STATIC void 305static void
294put_padlist (pTHX_ CV *cv) 306put_padlist (CV *cv)
295{ 307{
296 MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 308 MAGIC *mg = CORO_MAGIC (cv);
309 AV *av;
297 310
298 if (!mg) 311 if (!mg)
299 { 312 {
300 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0); 313 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
301 mg = mg_find ((SV *)cv, PERL_MAGIC_coro); 314 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
302 mg->mg_virtual = &vtbl_coro; 315 mg->mg_virtual = &vtbl_coro;
303 mg->mg_obj = (SV *)newAV (); 316 mg->mg_obj = (SV *)newAV ();
304 } 317 }
305 318
306 av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv)); 319 av = (AV *)mg->mg_obj;
320
321 if (AvFILLp (av) >= AvMAX (av))
322 av_extend (av, AvMAX (av) + 1);
323
324 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
307} 325}
326
327/** load & save, init *******************************************************/
308 328
309#define SB do { 329#define SB do {
310#define SE } while (0) 330#define SE } while (0)
311 331
312#define LOAD(state) load_state(aTHX_ (state));
313#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
314
315#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE 332#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
316 333
317static void 334static void
318load_state(pTHX_ Coro__State c) 335load_perl (Coro__State c)
319{ 336{
320 PL_dowarn = c->dowarn; 337#define VAR(name,type) PL_ ## name = c->name;
321 PL_in_eval = c->in_eval; 338# include "state.h"
322 339#undef VAR
323 PL_curstackinfo = c->curstackinfo;
324 PL_curstack = c->curstack;
325 PL_mainstack = c->mainstack;
326 PL_stack_sp = c->stack_sp;
327 PL_op = c->op;
328 PL_curpad = c->curpad;
329 PL_comppad = c->comppad;
330 PL_stack_base = c->stack_base;
331 PL_stack_max = c->stack_max;
332 PL_tmps_stack = c->tmps_stack;
333 PL_tmps_floor = c->tmps_floor;
334 PL_tmps_ix = c->tmps_ix;
335 PL_tmps_max = c->tmps_max;
336 PL_markstack = c->markstack;
337 PL_markstack_ptr = c->markstack_ptr;
338 PL_markstack_max = c->markstack_max;
339 PL_scopestack = c->scopestack;
340 PL_scopestack_ix = c->scopestack_ix;
341 PL_scopestack_max = c->scopestack_max;
342 PL_savestack = c->savestack;
343 PL_savestack_ix = c->savestack_ix;
344 PL_savestack_max = c->savestack_max;
345 PL_retstack = c->retstack;
346 PL_retstack_ix = c->retstack_ix;
347 PL_retstack_max = c->retstack_max;
348 PL_curcop = c->curcop;
349 PL_top_env = c->top_env;
350 340
351 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 341 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
352 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 342 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
353 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 343 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
344 if (c->irssv)
345 {
346 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
347 SvREFCNT_dec (c->irssv);
348 else
349 {
350 REPLACE_SV (PL_rs, c->irssv);
351 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
352 sv_setsv (c->irssv_sv, PL_rs);
353 }
354 }
354 355
355 { 356 {
356 dSP; 357 dSP;
357 CV *cv; 358 CV *cv;
358 359
359 /* now do the ugly restore mess */ 360 /* now do the ugly restore mess */
360 while ((cv = (CV *)POPs)) 361 while ((cv = (CV *)POPs))
361 { 362 {
362 AV *padlist = (AV *)POPs;
363
364 if (padlist)
365 {
366 put_padlist (aTHX_ cv); /* mark this padlist as available */ 363 put_padlist (cv); /* mark this padlist as available */
367 CvPADLIST(cv) = padlist; 364 CvDEPTH (cv) = PTR2IV (POPs);
368 } 365 CvPADLIST (cv) = (AV *)POPs;
369
370 ++CvDEPTH(cv);
371 } 366 }
372 367
373 PUTBACK; 368 PUTBACK;
374 } 369 }
370 assert (!PL_comppad || AvARRAY (PL_comppad));//D
375} 371}
376 372
377static void 373static void
378save_state(pTHX_ Coro__State c, int flags) 374save_perl (Coro__State c)
379{ 375{
376 assert (!PL_comppad || AvARRAY (PL_comppad));//D
380 { 377 {
381 dSP; 378 dSP;
382 I32 cxix = cxstack_ix; 379 I32 cxix = cxstack_ix;
383 PERL_CONTEXT *ccstk = cxstack; 380 PERL_CONTEXT *ccstk = cxstack;
384 PERL_SI *top_si = PL_curstackinfo; 381 PERL_SI *top_si = PL_curstackinfo;
… …
386 /* 383 /*
387 * the worst thing you can imagine happens first - we have to save 384 * the worst thing you can imagine happens first - we have to save
388 * (and reinitialize) all cv's in the whole callchain :( 385 * (and reinitialize) all cv's in the whole callchain :(
389 */ 386 */
390 387
388 EXTEND (SP, 3 + 1);
391 PUSHs (Nullsv); 389 PUSHs (Nullsv);
392 /* this loop was inspired by pp_caller */ 390 /* this loop was inspired by pp_caller */
393 for (;;) 391 for (;;)
394 { 392 {
395 while (cxix >= 0) 393 while (cxix >= 0)
396 { 394 {
397 PERL_CONTEXT *cx = &ccstk[cxix--]; 395 PERL_CONTEXT *cx = &ccstk[cxix--];
398 396
399 if (CxTYPE(cx) == CXt_SUB) 397 if (CxTYPE (cx) == CXt_SUB)
400 { 398 {
401 CV *cv = cx->blk_sub.cv; 399 CV *cv = cx->blk_sub.cv;
400
402 if (CvDEPTH(cv)) 401 if (CvDEPTH (cv))
403 { 402 {
404 EXTEND (SP, CvDEPTH(cv)*2); 403 EXTEND (SP, 3);
405
406 while (--CvDEPTH(cv))
407 {
408 /* this tells the restore code to increment CvDEPTH */
409 PUSHs (Nullsv);
410 PUSHs ((SV *)cv);
411 }
412
413 PUSHs ((SV *)CvPADLIST(cv)); 404 PUSHs ((SV *)CvPADLIST (cv));
405 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
414 PUSHs ((SV *)cv); 406 PUSHs ((SV *)cv);
415 407
416 get_padlist (aTHX_ cv); /* this is a monster */ 408 CvDEPTH (cv) = 0;
409 get_padlist (cv);
417 } 410 }
418 } 411 }
419#ifdef CXt_FORMAT
420 else if (CxTYPE(cx) == CXt_FORMAT)
421 {
422 /* I never used formats, so how should I know how these are implemented? */
423 /* my bold guess is as a simple, plain sub... */
424 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
425 }
426#endif
427 } 412 }
428 413
429 if (top_si->si_type == PERLSI_MAIN) 414 if (top_si->si_type == PERLSI_MAIN)
430 break; 415 break;
431 416
… …
435 } 420 }
436 421
437 PUTBACK; 422 PUTBACK;
438 } 423 }
439 424
440 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 425 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
441 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 426 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
442 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 427 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
428 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
443 429
444 c->dowarn = PL_dowarn; 430#define VAR(name,type)c->name = PL_ ## name;
445 c->in_eval = PL_in_eval; 431# include "state.h"
446 432#undef VAR
447 c->curstackinfo = PL_curstackinfo;
448 c->curstack = PL_curstack;
449 c->mainstack = PL_mainstack;
450 c->stack_sp = PL_stack_sp;
451 c->op = PL_op;
452 c->curpad = PL_curpad;
453 c->comppad = PL_comppad;
454 c->stack_base = PL_stack_base;
455 c->stack_max = PL_stack_max;
456 c->tmps_stack = PL_tmps_stack;
457 c->tmps_floor = PL_tmps_floor;
458 c->tmps_ix = PL_tmps_ix;
459 c->tmps_max = PL_tmps_max;
460 c->markstack = PL_markstack;
461 c->markstack_ptr = PL_markstack_ptr;
462 c->markstack_max = PL_markstack_max;
463 c->scopestack = PL_scopestack;
464 c->scopestack_ix = PL_scopestack_ix;
465 c->scopestack_max = PL_scopestack_max;
466 c->savestack = PL_savestack;
467 c->savestack_ix = PL_savestack_ix;
468 c->savestack_max = PL_savestack_max;
469 c->retstack = PL_retstack;
470 c->retstack_ix = PL_retstack_ix;
471 c->retstack_max = PL_retstack_max;
472 c->curcop = PL_curcop;
473 c->top_env = PL_top_env;
474} 433}
475 434
476/* 435/*
477 * allocate various perl stacks. This is an exact copy 436 * allocate various perl stacks. This is an exact copy
478 * of perl.c:init_stacks, except that it uses less memory 437 * of perl.c:init_stacks, except that it uses less memory
479 * on the (sometimes correct) assumption that coroutines do 438 * on the (sometimes correct) assumption that coroutines do
480 * not usually need a lot of stackspace. 439 * not usually need a lot of stackspace.
481 */ 440 */
482STATIC void 441#if PREFER_PERL_FUNCTIONS
442# define coro_init_stacks init_stacks
443#else
444static void
483coro_init_stacks (pTHX) 445coro_init_stacks ()
484{ 446{
485 LOCK;
486
487 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 447 PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
488 PL_curstackinfo->si_type = PERLSI_MAIN; 448 PL_curstackinfo->si_type = PERLSI_MAIN;
489 PL_curstack = PL_curstackinfo->si_stack; 449 PL_curstack = PL_curstackinfo->si_stack;
490 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 450 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
491 451
492 PL_stack_base = AvARRAY(PL_curstack); 452 PL_stack_base = AvARRAY(PL_curstack);
493 PL_stack_sp = PL_stack_base; 453 PL_stack_sp = PL_stack_base;
494 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 454 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
495 455
496 New(50,PL_tmps_stack,96,SV*); 456 New(50,PL_tmps_stack,128,SV*);
497 PL_tmps_floor = -1; 457 PL_tmps_floor = -1;
498 PL_tmps_ix = -1; 458 PL_tmps_ix = -1;
499 PL_tmps_max = 96; 459 PL_tmps_max = 128;
500 460
501 New(54,PL_markstack,16,I32); 461 New(54,PL_markstack,32,I32);
502 PL_markstack_ptr = PL_markstack; 462 PL_markstack_ptr = PL_markstack;
503 PL_markstack_max = PL_markstack + 16; 463 PL_markstack_max = PL_markstack + 32;
504 464
505#ifdef SET_MARK_OFFSET 465#ifdef SET_MARK_OFFSET
506 SET_MARK_OFFSET; 466 SET_MARK_OFFSET;
507#endif 467#endif
508 468
509 New(54,PL_scopestack,16,I32); 469 New(54,PL_scopestack,32,I32);
510 PL_scopestack_ix = 0; 470 PL_scopestack_ix = 0;
511 PL_scopestack_max = 16; 471 PL_scopestack_max = 32;
512 472
513 New(54,PL_savestack,96,ANY); 473 New(54,PL_savestack,64,ANY);
514 PL_savestack_ix = 0; 474 PL_savestack_ix = 0;
515 PL_savestack_max = 96; 475 PL_savestack_max = 64;
516 476
477#if !PERL_VERSION_ATLEAST (5,9,0)
517 New(54,PL_retstack,8,OP*); 478 New(54,PL_retstack,16,OP*);
518 PL_retstack_ix = 0; 479 PL_retstack_ix = 0;
519 PL_retstack_max = 8; 480 PL_retstack_max = 16;
520 481#endif
521 UNLOCK;
522} 482}
483#endif
523 484
524/* 485/*
525 * destroy the stacks, the callchain etc... 486 * destroy the stacks, the callchain etc...
526 */ 487 */
527STATIC void 488static void
528destroy_stacks(pTHX) 489coro_destroy_stacks ()
529{ 490{
530 if (!IN_DESTRUCT) 491 if (!IN_DESTRUCT)
531 { 492 {
532 /* is this ugly, I ask? */ 493 /* restore all saved variables and stuff */
533 LEAVE_SCOPE (0); 494 LEAVE_SCOPE (0);
495 assert (PL_tmps_floor == -1);
534 496
535 /* sure it is, but more important: is it correct?? :/ */ 497 /* free all temporaries */
536 FREETMPS; 498 FREETMPS;
499 assert (PL_tmps_ix == -1);
537 500
501 /* unwind all extra stacks */
538 /*POPSTACK_TO (PL_mainstack);*//*D*//*use*/ 502 POPSTACK_TO (PL_mainstack);
503
504 /* unwind main stack */
505 dounwind (-1);
539 } 506 }
540 507
541 while (PL_curstackinfo->si_next) 508 while (PL_curstackinfo->si_next)
542 PL_curstackinfo = PL_curstackinfo->si_next; 509 PL_curstackinfo = PL_curstackinfo->si_next;
543 510
544 while (PL_curstackinfo) 511 while (PL_curstackinfo)
545 { 512 {
546 PERL_SI *p = PL_curstackinfo->si_prev; 513 PERL_SI *p = PL_curstackinfo->si_prev;
547 514
548 { /*D*//*remove*/
549 dSP;
550 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
551 PUTBACK; /* possibly superfluous */
552 }
553
554 if (!IN_DESTRUCT) 515 if (!IN_DESTRUCT)
555 {
556 dounwind (-1);/*D*//*remove*/
557 SvREFCNT_dec (PL_curstackinfo->si_stack); 516 SvREFCNT_dec (PL_curstackinfo->si_stack);
558 }
559 517
560 Safefree (PL_curstackinfo->si_cxstack); 518 Safefree (PL_curstackinfo->si_cxstack);
561 Safefree (PL_curstackinfo); 519 Safefree (PL_curstackinfo);
562 PL_curstackinfo = p; 520 PL_curstackinfo = p;
563 } 521 }
564 522
565 Safefree (PL_tmps_stack); 523 Safefree (PL_tmps_stack);
566 Safefree (PL_markstack); 524 Safefree (PL_markstack);
567 Safefree (PL_scopestack); 525 Safefree (PL_scopestack);
568 Safefree (PL_savestack); 526 Safefree (PL_savestack);
527#if !PERL_VERSION_ATLEAST (5,9,0)
569 Safefree (PL_retstack); 528 Safefree (PL_retstack);
570}
571
572static void
573allocate_stack (Coro__State ctx, int alloc)
574{
575 coro_stack *stack;
576
577 New (0, stack, 1, coro_stack);
578
579 stack->refcnt = 1;
580 stack->usecnt = 1;
581 stack->gencnt = ctx->gencnt = 0;
582
583 if (alloc)
584 {
585#if HAVE_MMAP
586 stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
587 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
588 if (stack->sptr == (void *)-1)
589#endif 529#endif
590 {
591 /*FIXME*//*D*//* reasonable stack size! */
592 stack->ssize = - (8192 * sizeof (long));
593 New (0, stack->sptr, 8192, long);
594 }
595 }
596 else
597 stack->sptr = 0;
598
599 ctx->stack = stack;
600} 530}
601 531
602static void 532/** coroutine stack handling ************************************************/
603deallocate_stack (Coro__State ctx)
604{
605 coro_stack *stack = ctx->stack;
606 533
607 ctx->stack = 0;
608
609 if (stack)
610 {
611 if (!--stack->refcnt)
612 {
613#ifdef HAVE_MMAP
614 if (stack->ssize > 0 && stack->sptr)
615 munmap (stack->sptr, stack->ssize);
616 else
617#endif
618 Safefree (stack->sptr);
619
620 Safefree (stack);
621 }
622 else if (ctx->gencnt == stack->gencnt)
623 --stack->usecnt;
624 }
625}
626
627static void 534static void
628setup_coro (void *arg) 535setup_coro (struct coro *coro)
629{ 536{
630 /* 537 /*
631 * emulate part of the perl startup here. 538 * emulate part of the perl startup here.
632 */ 539 */
633 dTHX; 540
541 coro_init_stacks ();
542
543 PL_curcop = &PL_compiling;
544 PL_in_eval = EVAL_NULL;
545 PL_comppad = 0;
546 PL_curpm = 0;
547 PL_localizing = 0;
548 PL_dirty = 0;
549 PL_restartop = 0;
550
551 {
552 dSP;
553 LOGOP myop;
554
555 SvREFCNT_dec (GvAV (PL_defgv));
556 GvAV (PL_defgv) = coro->args; coro->args = 0;
557
558 Zero (&myop, 1, LOGOP);
559 myop.op_next = Nullop;
560 myop.op_flags = OPf_WANT_VOID;
561
562 PUSHMARK (SP);
563 XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
564 PUTBACK;
565 PL_op = (OP *)&myop;
566 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
567 SPAGAIN;
568 }
569
570 ENTER; /* necessary e.g. for dounwind */
571}
572
573static void
574free_coro_mortal ()
575{
576 if (coro_mortal)
577 {
578 SvREFCNT_dec (coro_mortal);
579 coro_mortal = 0;
580 }
581}
582
583/* inject a fake call to Coro::State::_cctx_init into the execution */
584static void NOINLINE
585prepare_cctx (coro_cctx *cctx)
586{
634 dSP; 587 dSP;
635 Coro__State ctx = (Coro__State)arg; 588 LOGOP myop;
636 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
637 589
638 coro_init_stacks (aTHX); 590 Zero (&myop, 1, LOGOP);
639 /*PL_curcop = 0;*/ 591 myop.op_next = PL_op;
640 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 592 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
641 SvREFCNT_dec (GvAV (PL_defgv));
642 GvAV (PL_defgv) = ctx->args; ctx->args = 0;
643 593
594 PUSHMARK (SP);
595 EXTEND (SP, 2);
596 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
597 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
598 PUTBACK;
599 PL_op = (OP *)&myop;
600 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
644 SPAGAIN; 601 SPAGAIN;
645
646 if (ctx->stack)
647 {
648 ctx->cursp = 0;
649
650 PUSHMARK(SP);
651 PUTBACK;
652 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
653
654 if (SvTRUE (ERRSV))
655 croak (NULL);
656 else
657 croak ("FATAL: CCTXT coroutine returned!");
658 }
659 else
660 {
661 UNOP myop;
662
663 PL_op = (OP *)&myop;
664
665 Zero(&myop, 1, UNOP);
666 myop.op_next = Nullop;
667 myop.op_flags = OPf_WANT_VOID;
668
669 PUSHMARK(SP);
670 XPUSHs (sub_init);
671 /*
672 * the next line is slightly wrong, as PL_op->op_next
673 * is actually being executed so we skip the first op.
674 * that doesn't matter, though, since it is only
675 * pp_nextstate and we never return...
676 * ah yes, and I don't care anyways ;)
677 */
678 PUTBACK;
679 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
680 SPAGAIN;
681
682 ENTER; /* necessary e.g. for dounwind */
683 }
684} 602}
685 603
686static void 604static void
687continue_coro (void *arg) 605coro_run (void *arg)
688{ 606{
607 /* coro_run is the alternative tail of transfer(), so unlock here. */
608 UNLOCK;
609
689 /* 610 /*
690 * this is a _very_ stripped down perl interpreter ;) 611 * this is a _very_ stripped down perl interpreter ;)
691 */ 612 */
692 dTHX;
693 Coro__State ctx = (Coro__State)arg;
694 JMPENV coro_start_env;
695
696 PL_top_env = &ctx->start_env; 613 PL_top_env = &PL_start_env;
697 614
698 ctx->cursp = 0; 615 /* inject call to cctx_init */
699 PL_op = PL_op->op_next; 616 prepare_cctx ((coro_cctx *)arg);
700 CALLRUNOPS(aTHX);
701 617
618 /* somebody will hit me for both perl_run and PL_restartop */
619 PL_restartop = PL_op;
620 perl_run (PL_curinterp);
621
622 fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
702 abort (); 623 abort ();
703} 624}
704 625
705STATIC void 626static coro_cctx *
627cctx_new ()
628{
629 coro_cctx *cctx;
630
631 ++cctx_count;
632
633 Newz (0, cctx, 1, coro_cctx);
634
635#if HAVE_MMAP
636
637 cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
638 /* mmap supposedly does allocate-on-write for us */
639 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
640
641 if (cctx->sptr != (void *)-1)
642 {
643# if STACKGUARD
644 mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
645# endif
646 REGISTER_STACK (
647 cctx,
648 STACKGUARD * PAGESIZE + (char *)cctx->sptr,
649 cctx->ssize + (char *)cctx->sptr
650 );
651
652 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
653 }
654 else
655#endif
656 {
657 cctx->ssize = -STACKSIZE * (long)sizeof (long);
658 New (0, cctx->sptr, STACKSIZE, long);
659
660 if (!cctx->sptr)
661 {
662 perror ("FATAL: unable to allocate stack for coroutine");
663 _exit (EXIT_FAILURE);
664 }
665
666 REGISTER_STACK (
667 cctx,
668 (char *)cctx->sptr,
669 (char *)cctx->sptr - cctx->ssize
670 );
671
672 coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, -cctx->ssize);
673 }
674
675 return cctx;
676}
677
678static void
679cctx_destroy (coro_cctx *cctx)
680{
681 if (!cctx)
682 return;
683
684 --cctx_count;
685
686#if USE_VALGRIND
687 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
688#endif
689
690#if HAVE_MMAP
691 if (cctx->ssize > 0)
692 munmap (cctx->sptr, cctx->ssize);
693 else
694#endif
695 Safefree (cctx->sptr);
696
697 Safefree (cctx);
698}
699
700static coro_cctx *
701cctx_get ()
702{
703 coro_cctx *cctx;
704
705 if (cctx_first)
706 {
707 cctx = cctx_first;
708 cctx_first = cctx->next;
709 --cctx_idle;
710 }
711 else
712 {
713 cctx = cctx_new ();
714 PL_op = PL_op->op_next;
715 }
716
717 return cctx;
718}
719
720static void
721cctx_put (coro_cctx *cctx)
722{
723 /* free another cctx if overlimit */
724 if (cctx_idle >= MAX_IDLE_CCTX)
725 {
726 coro_cctx *first = cctx_first;
727 cctx_first = first->next;
728 --cctx_idle;
729
730 assert (!first->inuse);
731 cctx_destroy (first);
732 }
733
734 ++cctx_idle;
735 cctx->next = cctx_first;
736 cctx_first = cctx;
737}
738
739/** coroutine switching *****************************************************/
740
741/* never call directly, always through the coro_state_transfer global variable */
742static void NOINLINE
706transfer (pTHX_ struct coro *prev, struct coro *next, int flags) 743transfer (struct coro *prev, struct coro *next)
707{ 744{
708 dSTACKLEVEL; 745 dSTACKLEVEL;
709 746
747 /* sometimes transfer is only called to set idle_sp */
748 if (!next)
749 {
750 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
751 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
752 }
710 if (prev != next) 753 else if (prev != next)
711 { 754 {
712 if (next->mainstack) 755 coro_cctx *prev__cctx;
756
757 if (prev->flags & CF_NEW)
713 { 758 {
714 LOCK; 759 /* create a new empty context */
715 SAVE (prev, flags); 760 Newz (0, prev->cctx, 1, coro_cctx);
716 LOAD (next); 761 prev->cctx->inuse = 1;
717 UNLOCK; 762 prev->flags &= ~CF_NEW;
718 763 prev->flags |= CF_RUNNING;
719 /* mark this state as in-use */
720 next->mainstack = 0;
721 next->tmps_ix = -2;
722
723 /* stacklevel changed? if yes, grab the stack for us! */
724 if (flags & TRANSFER_SAVE_CCTXT)
725 {
726 if (!prev->stack)
727 allocate_stack (prev, 0);
728 else if (prev->cursp != stacklevel
729 && prev->stack->usecnt > 1)
730 {
731 prev->gencnt = ++prev->stack->gencnt;
732 prev->stack->usecnt = 1;
733 }
734
735 /* has our stack been invalidated? */
736 if (next->stack && next->stack->gencnt != next->gencnt)
737 {
738 deallocate_stack (next);
739 allocate_stack (next, 1);
740 coro_create (&(next->stack->cctx),
741 continue_coro, (void *)next,
742 next->stack->sptr, labs (next->stack->ssize));
743 }
744
745 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
746 prev->cursp = stacklevel;
747 /* don't add any code here */
748 }
749 else
750 next->cursp = stacklevel;
751 } 764 }
752 else if (next->tmps_ix == -2) 765
753 croak ("tried to transfer to running coroutine"); 766 /*TODO: must not croak here */
767 if (!prev->flags & CF_RUNNING)
768 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
769
770 if (next->flags & CF_RUNNING)
771 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
772
773 if (next->flags & CF_DESTROYED)
774 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
775
776 prev->flags &= ~CF_RUNNING;
777 next->flags |= CF_RUNNING;
778
779 LOCK;
780
781 if (next->flags & CF_NEW)
782 {
783 /* need to start coroutine */
784 next->flags &= ~CF_NEW;
785 /* first get rid of the old state */
786 save_perl (prev);
787 /* setup coroutine call */
788 setup_coro (next);
789 /* need a new stack */
790 assert (!next->cctx);
791 }
754 else 792 else
755 { 793 {
756 LOCK; 794 /* coroutine already started */
757 SAVE (prev, -1); /* first get rid of the old state */ 795 save_perl (prev);
758 UNLOCK; 796 load_perl (next);
759
760 if (flags & TRANSFER_SAVE_CCTXT)
761 {
762 if (!prev->stack)
763 allocate_stack (prev, 0);
764
765 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
766 {
767 PL_top_env = &next->start_env;
768
769 setup_coro (next);
770 next->cursp = stacklevel;
771
772 prev->stack->refcnt++;
773 prev->stack->usecnt++;
774 next->stack = prev->stack;
775 next->gencnt = prev->gencnt;
776 }
777 else
778 {
779 assert (!next->stack);
780 allocate_stack (next, 1);
781 coro_create (&(next->stack->cctx),
782 setup_coro, (void *)next,
783 next->stack->sptr, labs (next->stack->ssize));
784 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
785 prev->cursp = stacklevel;
786 /* don't add any code here */
787 }
788 }
789 else
790 {
791 setup_coro (next);
792 next->cursp = stacklevel;
793 }
794 } 797 }
795 }
796 798
797 LOCK; 799 prev__cctx = prev->cctx;
798 if (coro_mortal) 800
799 { 801 /* possibly "free" the cctx */
800 SvREFCNT_dec (coro_mortal); 802 if (prev__cctx->idle_sp == STACKLEVEL)
803 {
804 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
805 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
806
807 prev->cctx = 0;
808
809 cctx_put (prev__cctx);
810 prev__cctx->inuse = 0;
811 }
812
813 if (!next->cctx)
814 {
815 next->cctx = cctx_get ();
816 assert (!next->cctx->inuse);
817 next->cctx->inuse = 1;
818 }
819
820 if (prev__cctx != next->cctx)
821 {
822 prev__cctx->top_env = PL_top_env;
823 PL_top_env = next->cctx->top_env;
824 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
825 }
826
801 coro_mortal = 0; 827 free_coro_mortal ();
802 }
803 UNLOCK; 828 UNLOCK;
829 }
804} 830}
805 831
806#define SV_CORO(sv,func) \ 832struct transfer_args
807 do { \ 833{
808 if (SvROK (sv)) \ 834 struct coro *prev, *next;
809 sv = SvRV (sv); \ 835};
810 \
811 if (SvTYPE (sv) == SVt_PVHV) \
812 { \
813 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
814 \
815 if (!he) \
816 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
817 \
818 (sv) = SvRV (HeVAL(he)); \
819 } \
820 \
821 /* must also be changed inside Coro::Cont::yield */ \
822 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
823 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
824 \
825 } while(0)
826 836
827#define SvSTATE(sv) (struct coro *)SvIV (sv) 837#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
828 838
839/** high level stuff ********************************************************/
840
829static void 841static int
842coro_state_destroy (struct coro *coro)
843{
844 if (coro->flags & CF_DESTROYED)
845 return 0;
846
847 coro->flags |= CF_DESTROYED;
848
849 if (coro->flags & CF_READY)
850 {
851 /* reduce nready, as destroying a ready coro effectively unreadies it */
852 /* alternative: look through all ready queues and remove the coro */
853 LOCK;
854 --coro_nready;
855 UNLOCK;
856 }
857 else
858 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
859
860 if (coro->mainstack && coro->mainstack != main_mainstack)
861 {
862 struct coro temp;
863
864 assert (!(coro->flags & CF_RUNNING));
865
866 Zero (&temp, 1, struct coro);
867 temp.save = CORO_SAVE_ALL;
868
869 if (coro->flags & CF_RUNNING)
870 croak ("FATAL: tried to destroy currently running coroutine");
871
872 save_perl (&temp);
873 load_perl (coro);
874
875 coro_destroy_stacks ();
876
877 load_perl (&temp); /* this will get rid of defsv etc.. */
878
879 coro->mainstack = 0;
880 }
881
882 cctx_destroy (coro->cctx);
883 SvREFCNT_dec (coro->args);
884
885 return 1;
886}
887
888static int
889coro_state_free (pTHX_ SV *sv, MAGIC *mg)
890{
891 struct coro *coro = (struct coro *)mg->mg_ptr;
892 mg->mg_ptr = 0;
893
894 if (--coro->refcnt < 0)
895 {
896 coro_state_destroy (coro);
897 Safefree (coro);
898 }
899
900 return 0;
901}
902
903static int
904coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
905{
906 struct coro *coro = (struct coro *)mg->mg_ptr;
907
908 ++coro->refcnt;
909
910 return 0;
911}
912
913static MGVTBL coro_state_vtbl = {
914 0, 0, 0, 0,
915 coro_state_free,
916 0,
917#ifdef MGf_DUP
918 coro_state_dup,
919#else
920# define MGf_DUP 0
921#endif
922};
923
924static struct coro *
925SvSTATE (SV *coro)
926{
927 HV *stash;
928 MAGIC *mg;
929
930 if (SvROK (coro))
931 coro = SvRV (coro);
932
933 stash = SvSTASH (coro);
934 if (stash != coro_stash && stash != coro_state_stash)
935 {
936 /* very slow, but rare, check */
937 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
938 croak ("Coro::State object required");
939 }
940
941 mg = SvMAGIC (coro);
942 assert (mg->mg_type == PERL_MAGIC_ext);
943 return (struct coro *)mg->mg_ptr;
944}
945
946static void
947prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
948{
949 ta->prev = SvSTATE (prev_sv);
950 ta->next = SvSTATE (next_sv);
951}
952
953static void
830api_transfer(pTHX_ SV *prev, SV *next, int flags) 954api_transfer (SV *prev_sv, SV *next_sv)
831{ 955{
832 SV_CORO (prev, "Coro::transfer"); 956 struct transfer_args ta;
833 SV_CORO (next, "Coro::transfer");
834 957
835 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 958 prepare_transfer (&ta, prev_sv, next_sv);
959 TRANSFER (ta);
960}
961
962static int
963api_save (SV *coro_sv, int new_save)
964{
965 struct coro *coro = SvSTATE (coro_sv);
966 int old_save = coro->save;
967
968 if (new_save >= 0)
969 coro->save = new_save;
970
971 return old_save;
836} 972}
837 973
838/** Coro ********************************************************************/ 974/** Coro ********************************************************************/
839 975
840#define PRIO_MAX 3
841#define PRIO_HIGH 1
842#define PRIO_NORMAL 0
843#define PRIO_LOW -1
844#define PRIO_IDLE -3
845#define PRIO_MIN -4
846
847/* for Coro.pm */
848static GV *coro_current, *coro_idle;
849static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
850static int coro_nready;
851
852static void 976static void
853coro_enq (pTHX_ SV *sv) 977coro_enq (SV *coro_sv)
854{ 978{
855 if (SvTYPE (sv) == SVt_PVHV)
856 {
857 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
858 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
859
860 prio = prio > PRIO_MAX ? PRIO_MAX
861 : prio < PRIO_MIN ? PRIO_MIN
862 : prio;
863
864 av_push (coro_ready [prio - PRIO_MIN], sv); 979 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
865 coro_nready++;
866
867 return;
868 }
869
870 croak ("Coro::ready tried to enqueue something that is not a coroutine");
871} 980}
872 981
873static SV * 982static SV *
874coro_deq (pTHX_ int min_prio) 983coro_deq (int min_prio)
875{ 984{
876 int prio = PRIO_MAX - PRIO_MIN; 985 int prio = PRIO_MAX - PRIO_MIN;
877 986
878 min_prio -= PRIO_MIN; 987 min_prio -= PRIO_MIN;
879 if (min_prio < 0) 988 if (min_prio < 0)
880 min_prio = 0; 989 min_prio = 0;
881 990
882 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 991 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
883 if (av_len (coro_ready[prio]) >= 0) 992 if (AvFILLp (coro_ready [prio]) >= 0)
884 {
885 coro_nready--;
886 return av_shift (coro_ready[prio]); 993 return av_shift (coro_ready [prio]);
887 }
888 994
889 return 0; 995 return 0;
890} 996}
891 997
892static void 998static int
893api_ready (SV *coro) 999api_ready (SV *coro_sv)
894{ 1000{
895 dTHX; 1001 struct coro *coro;
896 1002
897 if (SvROK (coro)) 1003 if (SvROK (coro_sv))
898 coro = SvRV (coro); 1004 coro_sv = SvRV (coro_sv);
1005
1006 coro = SvSTATE (coro_sv);
1007
1008 if (coro->flags & CF_READY)
1009 return 0;
1010
1011 coro->flags |= CF_READY;
899 1012
900 LOCK; 1013 LOCK;
901 coro_enq (aTHX_ SvREFCNT_inc (coro)); 1014 coro_enq (SvREFCNT_inc (coro_sv));
1015 ++coro_nready;
902 UNLOCK; 1016 UNLOCK;
1017
1018 return 1;
1019}
1020
1021static int
1022api_is_ready (SV *coro_sv)
1023{
1024 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1025}
1026
1027static void
1028prepare_schedule (struct transfer_args *ta)
1029{
1030 SV *prev_sv, *next_sv;
1031
1032 for (;;)
1033 {
1034 LOCK;
1035 next_sv = coro_deq (PRIO_MIN);
1036
1037 /* nothing to schedule: call the idle handler */
1038 if (!next_sv)
1039 {
1040 dSP;
1041 UNLOCK;
1042
1043 ENTER;
1044 SAVETMPS;
1045
1046 PUSHMARK (SP);
1047 PUTBACK;
1048 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1049
1050 FREETMPS;
1051 LEAVE;
1052 continue;
1053 }
1054
1055 ta->next = SvSTATE (next_sv);
1056
1057 /* cannot transfer to destroyed coros, skip and look for next */
1058 if (ta->next->flags & CF_DESTROYED)
1059 {
1060 UNLOCK;
1061 SvREFCNT_dec (next_sv);
1062 /* coro_nready is already taken care of by destroy */
1063 continue;
1064 }
1065
1066 --coro_nready;
1067 UNLOCK;
1068 break;
1069 }
1070
1071 /* free this only after the transfer */
1072 prev_sv = SvRV (coro_current);
1073 SvRV_set (coro_current, next_sv);
1074 ta->prev = SvSTATE (prev_sv);
1075
1076 assert (ta->next->flags & CF_READY);
1077 ta->next->flags &= ~CF_READY;
1078
1079 LOCK;
1080 free_coro_mortal ();
1081 coro_mortal = prev_sv;
1082 UNLOCK;
1083}
1084
1085static void
1086prepare_cede (struct transfer_args *ta)
1087{
1088 api_ready (coro_current);
1089 prepare_schedule (ta);
1090}
1091
1092static int
1093prepare_cede_notself (struct transfer_args *ta)
1094{
1095 if (coro_nready)
1096 {
1097 SV *prev = SvRV (coro_current);
1098 prepare_schedule (ta);
1099 api_ready (prev);
1100 return 1;
1101 }
1102 else
1103 return 0;
903} 1104}
904 1105
905static void 1106static void
906api_schedule (void) 1107api_schedule (void)
907{ 1108{
908 dTHX; 1109 struct transfer_args ta;
909 1110
910 SV *prev, *next; 1111 prepare_schedule (&ta);
911 1112 TRANSFER (ta);
912 LOCK;
913
914 prev = SvRV (GvSV (coro_current));
915 next = coro_deq (aTHX_ PRIO_MIN);
916
917 if (!next)
918 next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
919
920 /* free this only after the transfer */
921 coro_mortal = prev;
922 SV_CORO (prev, "Coro::schedule");
923
924 SvRV (GvSV (coro_current)) = next;
925
926 SV_CORO (next, "Coro::schedule");
927
928 UNLOCK;
929
930 transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
931 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
932} 1113}
933 1114
934static void 1115static int
935api_cede (void) 1116api_cede (void)
936{ 1117{
937 dTHX; 1118 struct transfer_args ta;
938 1119
939 LOCK; 1120 prepare_cede (&ta);
940 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
941 UNLOCK;
942 1121
943 api_schedule (); 1122 if (ta.prev != ta.next)
1123 {
1124 TRANSFER (ta);
1125 return 1;
1126 }
1127 else
1128 return 0;
1129}
1130
1131static int
1132api_cede_notself (void)
1133{
1134 struct transfer_args ta;
1135
1136 if (prepare_cede_notself (&ta))
1137 {
1138 TRANSFER (ta);
1139 return 1;
1140 }
1141 else
1142 return 0;
944} 1143}
945 1144
946MODULE = Coro::State PACKAGE = Coro::State 1145MODULE = Coro::State PACKAGE = Coro::State
947 1146
948PROTOTYPES: ENABLE 1147PROTOTYPES: DISABLE
949 1148
950BOOT: 1149BOOT:
951{ /* {} necessary for stoopid perl-5.6.x */ 1150{
952#ifdef USE_ITHREADS 1151#ifdef USE_ITHREADS
953 MUTEX_INIT (&coro_mutex); 1152 MUTEX_INIT (&coro_mutex);
954#endif 1153#endif
1154 BOOT_PAGESIZE;
955 1155
956 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
957 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
958 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1156 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
959 1157
960 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1158 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
961 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1159 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
962 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1160 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1161 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
963 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1162 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
964 1163
965 main_mainstack = PL_mainstack; 1164 main_mainstack = PL_mainstack;
966 1165
967 coroapi.ver = CORO_API_VERSION; 1166 coroapi.ver = CORO_API_VERSION;
968 coroapi.transfer = api_transfer; 1167 coroapi.transfer = api_transfer;
969}
970 1168
971Coro::State 1169 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
972_newprocess(args) 1170}
973 SV * args 1171
974 PROTOTYPE: $ 1172SV *
1173new (char *klass, ...)
975 CODE: 1174 CODE:
976 Coro__State coro; 1175{
1176 struct coro *coro;
1177 HV *hv;
1178 int i;
977 1179
978 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
979 croak ("Coro::State::_newprocess expects an arrayref");
980
981 Newz (0, coro, 1, struct coro); 1180 Newz (0, coro, 1, struct coro);
1181 coro->args = newAV ();
1182 coro->save = CORO_SAVE_ALL;
1183 coro->flags = CF_NEW;
982 1184
983 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1185 hv = newHV ();
984 /*coro->mainstack = 0; *//*actual work is done inside transfer */ 1186 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
985 /*coro->stack = 0;*/ 1187 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
986 1188
987 /* same as JMPENV_BOOTSTRAP */ 1189 for (i = 1; i < items; i++)
988 /* we might be able to recycle start_env, but safe is safe */ 1190 av_push (coro->args, newSVsv (ST (i)));
989 /*Zero(&coro->start_env, 1, JMPENV);*/ 1191}
990 coro->start_env.je_ret = -1;
991 coro->start_env.je_mustcatch = TRUE;
992
993 RETVAL = coro;
994 OUTPUT: 1192 OUTPUT:
995 RETVAL 1193 RETVAL
996 1194
1195int
1196save (SV *coro, int new_save = -1)
1197 CODE:
1198 RETVAL = api_save (coro, new_save);
1199 OUTPUT:
1200 RETVAL
1201
997void 1202void
998transfer(prev, next, flags) 1203_set_stacklevel (...)
999 SV *prev 1204 ALIAS:
1000 SV *next 1205 Coro::State::transfer = 1
1001 int flags 1206 Coro::schedule = 2
1002 PROTOTYPE: @ 1207 Coro::cede = 3
1208 Coro::cede_notself = 4
1003 CODE: 1209 CODE:
1004 PUTBACK; 1210{
1005 SV_CORO (next, "Coro::transfer"); 1211 struct transfer_args ta;
1006 SV_CORO (prev, "Coro::transfer"); 1212
1007 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1213 switch (ix)
1008 SPAGAIN; 1214 {
1215 case 0:
1216 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1217 ta.next = 0;
1218 break;
1219
1220 case 1:
1221 if (items != 2)
1222 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1223
1224 prepare_transfer (&ta, ST (0), ST (1));
1225 break;
1226
1227 case 2:
1228 prepare_schedule (&ta);
1229 break;
1230
1231 case 3:
1232 prepare_cede (&ta);
1233 break;
1234
1235 case 4:
1236 if (!prepare_cede_notself (&ta))
1237 XSRETURN_EMPTY;
1238
1239 break;
1240 }
1241
1242 BARRIER;
1243 TRANSFER (ta);
1244
1245 if (GIMME_V != G_VOID && ta.next != ta.prev)
1246 XSRETURN_YES;
1247}
1248
1249bool
1250_destroy (SV *coro_sv)
1251 CODE:
1252 RETVAL = coro_state_destroy (SvSTATE (coro_sv));
1253 OUTPUT:
1254 RETVAL
1009 1255
1010void 1256void
1011DESTROY(coro)
1012 Coro::State coro
1013 CODE:
1014
1015 if (coro->mainstack && coro->mainstack != main_mainstack)
1016 {
1017 struct coro temp;
1018
1019 PUTBACK;
1020 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
1021 LOAD(aTHX_ coro);
1022 SPAGAIN;
1023
1024 destroy_stacks (aTHX);
1025
1026 LOAD((&temp)); /* this will get rid of defsv etc.. */
1027 SPAGAIN;
1028
1029 coro->mainstack = 0;
1030 }
1031
1032 deallocate_stack (coro);
1033 SvREFCNT_dec (coro->args);
1034 Safefree (coro);
1035
1036void
1037_exit(code) 1257_exit (code)
1038 int code 1258 int code
1039 PROTOTYPE: $ 1259 PROTOTYPE: $
1040 CODE: 1260 CODE:
1041 _exit (code); 1261 _exit (code);
1042 1262
1043MODULE = Coro::State PACKAGE = Coro::Cont 1263int
1264cctx_count ()
1265 CODE:
1266 RETVAL = cctx_count;
1267 OUTPUT:
1268 RETVAL
1044 1269
1045# this is slightly dirty (should expose a c-level api) 1270int
1046 1271cctx_idle ()
1047void 1272 CODE:
1048yield(...) 1273 RETVAL = cctx_idle;
1049 PROTOTYPE: @ 1274 OUTPUT:
1050 CODE: 1275 RETVAL
1051 static SV *returnstk;
1052 SV *sv;
1053 AV *defav = GvAV (PL_defgv);
1054 struct coro *prev, *next;
1055
1056 if (!returnstk)
1057 returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1058
1059 /* set up @_ -- ugly */
1060 av_clear (defav);
1061 av_fill (defav, items - 1);
1062 while (items--)
1063 av_store (defav, items, SvREFCNT_inc (ST(items)));
1064
1065 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1066 sv = av_pop ((AV *)SvRV (returnstk));
1067 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1068 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1069 SvREFCNT_dec (sv);
1070
1071 transfer(aTHX_ prev, next, 0);
1072 1276
1073MODULE = Coro::State PACKAGE = Coro 1277MODULE = Coro::State PACKAGE = Coro
1074 1278
1075# this is slightly dirty (should expose a c-level api)
1076
1077BOOT: 1279BOOT:
1078{ 1280{
1079 int i; 1281 int i;
1282
1080 HV *stash = gv_stashpv ("Coro", TRUE); 1283 coro_stash = gv_stashpv ("Coro", TRUE);
1081 1284
1082 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1285 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1083 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1286 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1084 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1287 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1085 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1288 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1086 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1289 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1087 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1290 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1088 1291
1089 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV); 1292 coro_current = get_sv ("Coro::current", FALSE);
1090 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV); 1293 SvREADONLY_on (coro_current);
1091 1294
1092 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1295 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1093 coro_ready[i] = newAV (); 1296 coro_ready[i] = newAV ();
1094 1297
1095 { 1298 {
1096 SV *sv = perl_get_sv("Coro::API", 1); 1299 SV *sv = perl_get_sv("Coro::API", 1);
1097 1300
1098 coroapi.schedule = api_schedule; 1301 coroapi.schedule = api_schedule;
1302 coroapi.save = api_save;
1099 coroapi.cede = api_cede; 1303 coroapi.cede = api_cede;
1304 coroapi.cede_notself = api_cede_notself;
1100 coroapi.ready = api_ready; 1305 coroapi.ready = api_ready;
1306 coroapi.is_ready = api_is_ready;
1101 coroapi.nready = &coro_nready; 1307 coroapi.nready = &coro_nready;
1102 coroapi.current = coro_current; 1308 coroapi.current = coro_current;
1103 1309
1104 GCoroAPI = &coroapi; 1310 GCoroAPI = &coroapi;
1105 sv_setiv(sv, (IV)&coroapi); 1311 sv_setiv (sv, (IV)&coroapi);
1106 SvREADONLY_on(sv); 1312 SvREADONLY_on (sv);
1107 } 1313 }
1108} 1314}
1109 1315
1110#if !PERL_MICRO
1111
1112void 1316void
1113ready(self) 1317_set_current (SV *current)
1114 SV * self
1115 PROTOTYPE: $ 1318 PROTOTYPE: $
1116 CODE: 1319 CODE:
1117 api_ready (self); 1320 SvREFCNT_dec (SvRV (coro_current));
1118 1321 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1119#endif
1120 1322
1121int 1323int
1324prio (Coro::State coro, int newprio = 0)
1325 ALIAS:
1326 nice = 1
1327 CODE:
1328{
1329 RETVAL = coro->prio;
1330
1331 if (items > 1)
1332 {
1333 if (ix)
1334 newprio = coro->prio - newprio;
1335
1336 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1337 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1338
1339 coro->prio = newprio;
1340 }
1341}
1342 OUTPUT:
1343 RETVAL
1344
1345SV *
1346ready (SV *self)
1347 PROTOTYPE: $
1348 CODE:
1349 RETVAL = boolSV (api_ready (self));
1350 OUTPUT:
1351 RETVAL
1352
1353SV *
1354is_ready (SV *self)
1355 PROTOTYPE: $
1356 CODE:
1357 RETVAL = boolSV (api_is_ready (self));
1358 OUTPUT:
1359 RETVAL
1360
1361int
1122nready(...) 1362nready (...)
1123 PROTOTYPE: 1363 PROTOTYPE:
1124 CODE: 1364 CODE:
1125 RETVAL = coro_nready; 1365 RETVAL = coro_nready;
1126 OUTPUT: 1366 OUTPUT:
1127 RETVAL 1367 RETVAL
1128 1368
1369MODULE = Coro::State PACKAGE = Coro::AIO
1370
1371SV *
1372_get_state ()
1373 CODE:
1374{
1375 struct io_state *data;
1376
1377 RETVAL = newSV (sizeof (struct io_state));
1378 data = (struct io_state *)SvPVX (RETVAL);
1379 SvCUR_set (RETVAL, sizeof (struct io_state));
1380 SvPOK_only (RETVAL);
1381
1382 data->errorno = errno;
1383 data->laststype = PL_laststype;
1384 data->laststatval = PL_laststatval;
1385 data->statcache = PL_statcache;
1386}
1387 OUTPUT:
1388 RETVAL
1389
1129void 1390void
1130schedule(...) 1391_set_state (char *data_)
1131 PROTOTYPE: 1392 PROTOTYPE: $
1132 CODE: 1393 CODE:
1133 api_schedule (); 1394{
1395 struct io_state *data = (void *)data_;
1134 1396
1135void 1397 errno = data->errorno;
1136cede(...) 1398 PL_laststype = data->laststype;
1137 PROTOTYPE: 1399 PL_laststatval = data->laststatval;
1138 CODE: 1400 PL_statcache = data->statcache;
1139 api_cede (); 1401}
1140 1402

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