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Comparing Coro/Coro/State.xs (file contents):
Revision 1.56 by pcg, Thu Apr 1 02:41:05 2004 UTC vs.
Revision 1.145 by root, Mon Mar 12 21:40:14 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 CORO_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 CORO_STACKGUARD
80#endif
81
82#ifndef CORO_STACKGUARD
83# define CORO_STACKGUARD 0
84#endif
85
86/* prefer perl internal functions over our own? */
87#ifndef CORO_PREFER_PERL_FUNCTIONS
88# define CORO_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
68 119
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};
128
129static size_t coro_stacksize = CORO_STACKSIZE;
69static struct CoroAPI coroapi; 130static struct CoroAPI coroapi;
70static AV *main_mainstack; /* used to differentiate between $main and others */ 131static AV *main_mainstack; /* used to differentiate between $main and others */
71static HV *coro_state_stash; 132static HV *coro_state_stash, *coro_stash;
72static SV *ucoro_state_sv;
73static U32 ucoro_state_hash;
74static __thread SV *coro_mortal; /* will be freed after next transfer */ 133static SV *coro_mortal; /* will be freed after next transfer */
75 134
76/* this is actually not only the c stack but also c registers etc... */ 135static struct coro_cctx *cctx_first;
136static int cctx_count, cctx_idle;
137
138/* this is a structure representing a c-level coroutine */
77typedef struct { 139typedef struct coro_cctx {
78 int refcnt; /* pointer reference counter */ 140 struct coro_cctx *next;
79 int usecnt; /* shared by how many coroutines */
80 int gencnt; /* generation counter */
81 141
142 /* the stack */
143 void *sptr;
144 size_t ssize;
145
146 /* cpu state */
147 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
148 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
149 JMPENV *top_env;
82 coro_context cctx; 150 coro_context cctx;
83 151
84 void *sptr; 152#if CORO_USE_VALGRIND
85 long ssize; /* positive == mmap, otherwise malloc */ 153 int valgrind_id;
86} coro_stack; 154#endif
155 char inuse, mapped;
156} coro_cctx;
87 157
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 CORO_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 CORO_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);
500
501 /* unwind all extra stacks */
502 POPSTACK_TO (PL_mainstack);
503
504 /* unwind main stack */
505 dounwind (-1);
537 } 506 }
538 507
539 while (PL_curstackinfo->si_next) 508 while (PL_curstackinfo->si_next)
540 PL_curstackinfo = PL_curstackinfo->si_next; 509 PL_curstackinfo = PL_curstackinfo->si_next;
541 510
542 while (PL_curstackinfo) 511 while (PL_curstackinfo)
543 { 512 {
544 PERL_SI *p = PL_curstackinfo->si_prev; 513 PERL_SI *p = PL_curstackinfo->si_prev;
545 514
546 {
547 dSP;
548 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
549 PUTBACK; /* possibly superfluous */
550 }
551
552 if (!IN_DESTRUCT) 515 if (!IN_DESTRUCT)
553 {
554 dounwind(-1);
555 SvREFCNT_dec(PL_curstackinfo->si_stack); 516 SvREFCNT_dec (PL_curstackinfo->si_stack);
556 }
557 517
558 Safefree(PL_curstackinfo->si_cxstack); 518 Safefree (PL_curstackinfo->si_cxstack);
559 Safefree(PL_curstackinfo); 519 Safefree (PL_curstackinfo);
560 PL_curstackinfo = p; 520 PL_curstackinfo = p;
561 } 521 }
562 522
563 Safefree(PL_tmps_stack); 523 Safefree (PL_tmps_stack);
564 Safefree(PL_markstack); 524 Safefree (PL_markstack);
565 Safefree(PL_scopestack); 525 Safefree (PL_scopestack);
566 Safefree(PL_savestack); 526 Safefree (PL_savestack);
527#if !PERL_VERSION_ATLEAST (5,9,0)
567 Safefree(PL_retstack); 528 Safefree (PL_retstack);
568}
569
570static void
571allocate_stack (Coro__State ctx, int alloc)
572{
573 coro_stack *stack;
574
575 New (0, stack, 1, coro_stack);
576
577 stack->refcnt = 1;
578 stack->usecnt = 1;
579 stack->gencnt = ctx->gencnt = 0;
580
581 if (alloc)
582 {
583#if HAVE_MMAP
584 stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
585 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
586 if (stack->sptr == (void *)-1)
587#endif 529#endif
588 {
589 /*FIXME*//*D*//* reasonable stack size! */
590 stack->ssize = - (8192 * sizeof (long));
591 New (0, stack->sptr, 8192, long);
592 }
593 }
594 else
595 stack->sptr = 0;
596
597 ctx->stack = stack;
598} 530}
599 531
600static void 532/** coroutine stack handling ************************************************/
601deallocate_stack (Coro__State ctx)
602{
603 coro_stack *stack = ctx->stack;
604 533
605 ctx->stack = 0;
606
607 if (stack)
608 {
609 if (!--stack->refcnt)
610 {
611#ifdef HAVE_MMAP
612 if (stack->ssize > 0 && stack->sptr)
613 munmap (stack->sptr, stack->ssize);
614 else
615#endif
616 Safefree (stack->sptr);
617
618 Safefree (stack);
619 }
620 else if (ctx->gencnt == stack->gencnt)
621 --stack->usecnt;
622 }
623}
624
625static void 534static void
626setup_coro (void *arg) 535setup_coro (struct coro *coro)
627{ 536{
628 /* 537 /*
629 * emulate part of the perl startup here. 538 * emulate part of the perl startup here.
630 */ 539 */
631 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{
632 dSP; 587 dSP;
633 Coro__State ctx = (Coro__State)arg; 588 LOGOP myop;
634 SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
635 589
636 coro_init_stacks (aTHX); 590 Zero (&myop, 1, LOGOP);
637 /*PL_curcop = 0;*/ 591 myop.op_next = PL_op;
638 /*PL_in_eval = PL_in_eval;*/ /* inherit */ 592 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
639 SvREFCNT_dec (GvAV (PL_defgv));
640 GvAV (PL_defgv) = ctx->args; ctx->args = 0;
641 593
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);
642 SPAGAIN; 601 SPAGAIN;
643
644 if (ctx->stack)
645 {
646 ctx->cursp = 0;
647
648 PUSHMARK(SP);
649 PUTBACK;
650 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
651
652 if (SvTRUE (ERRSV))
653 croak (NULL);
654 else
655 croak ("FATAL: CCTXT coroutine returned!");
656 }
657 else
658 {
659 UNOP myop;
660
661 PL_op = (OP *)&myop;
662
663 Zero(&myop, 1, UNOP);
664 myop.op_next = Nullop;
665 myop.op_flags = OPf_WANT_VOID;
666
667 PUSHMARK(SP);
668 XPUSHs (sub_init);
669 /*
670 * the next line is slightly wrong, as PL_op->op_next
671 * is actually being executed so we skip the first op.
672 * that doesn't matter, though, since it is only
673 * pp_nextstate and we never return...
674 * ah yes, and I don't care anyways ;)
675 */
676 PUTBACK;
677 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
678 SPAGAIN;
679
680 ENTER; /* necessary e.g. for dounwind */
681 }
682} 602}
683 603
684static void 604static void
685continue_coro (void *arg) 605coro_run (void *arg)
686{ 606{
607 /* coro_run is the alternative tail of transfer(), so unlock here. */
608 UNLOCK;
609
687 /* 610 /*
688 * this is a _very_ stripped down perl interpreter ;) 611 * this is a _very_ stripped down perl interpreter ;)
689 */ 612 */
690 dTHX;
691 Coro__State ctx = (Coro__State)arg;
692 JMPENV coro_start_env;
693
694 PL_top_env = &ctx->start_env; 613 PL_top_env = &PL_start_env;
695 614
696 ctx->cursp = 0; 615 /* inject call to cctx_init */
616 prepare_cctx ((coro_cctx *)arg);
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);
623 abort ();
624}
625
626static coro_cctx *
627cctx_new ()
628{
629 coro_cctx *cctx;
630 void *stack_start;
631 size_t stack_size;
632
633 ++cctx_count;
634
635 Newz (0, cctx, 1, coro_cctx);
636
637#if HAVE_MMAP
638
639 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
640 /* mmap supposedly does allocate-on-write for us */
641 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
642
643 if (cctx->sptr != (void *)-1)
644 {
645# if CORO_STACKGUARD
646 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
647# endif
648 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
649 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
650 cctx->mapped = 1;
651 }
652 else
653#endif
654 {
655 cctx->ssize = coro_stacksize * (long)sizeof (long);
656 New (0, cctx->sptr, coro_stacksize, long);
657
658 if (!cctx->sptr)
659 {
660 perror ("FATAL: unable to allocate stack for coroutine");
661 _exit (EXIT_FAILURE);
662 }
663
664 stack_start = cctx->sptr;
665 stack_size = cctx->ssize;
666 }
667
668 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
669 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
670
671 return cctx;
672}
673
674static void
675cctx_destroy (coro_cctx *cctx)
676{
677 if (!cctx)
678 return;
679
680 --cctx_count;
681
682#if CORO_USE_VALGRIND
683 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
684#endif
685
686#if HAVE_MMAP
687 if (cctx->mapped)
688 munmap (cctx->sptr, cctx->ssize);
689 else
690#endif
691 Safefree (cctx->sptr);
692
693 Safefree (cctx);
694}
695
696static coro_cctx *
697cctx_get ()
698{
699 while (cctx_first)
700 {
701 coro_cctx *cctx = cctx_first;
702 cctx_first = cctx->next;
703 --cctx_idle;
704
705 if (cctx->ssize >= coro_stacksize)
706 return cctx;
707
708 cctx_destroy (cctx);
709 }
710
697 PL_op = PL_op->op_next; 711 PL_op = PL_op->op_next;
698 CALLRUNOPS(aTHX); 712 return cctx_new ();
699
700 abort ();
701} 713}
702 714
703STATIC void 715static void
716cctx_put (coro_cctx *cctx)
717{
718 /* free another cctx if overlimit */
719 if (cctx_idle >= MAX_IDLE_CCTX)
720 {
721 coro_cctx *first = cctx_first;
722 cctx_first = first->next;
723 --cctx_idle;
724
725 assert (!first->inuse);
726 cctx_destroy (first);
727 }
728
729 ++cctx_idle;
730 cctx->next = cctx_first;
731 cctx_first = cctx;
732}
733
734/** coroutine switching *****************************************************/
735
736/* never call directly, always through the coro_state_transfer global variable */
737static void NOINLINE
704transfer (pTHX_ struct coro *prev, struct coro *next, int flags) 738transfer (struct coro *prev, struct coro *next)
705{ 739{
706 dSTACKLEVEL; 740 dSTACKLEVEL;
707 741
742 /* sometimes transfer is only called to set idle_sp */
743 if (!next)
744 {
745 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
746 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
747 }
708 if (prev != next) 748 else if (prev != next)
709 { 749 {
710 if (next->mainstack) 750 coro_cctx *prev__cctx;
751
752 if (prev->flags & CF_NEW)
711 { 753 {
712 LOCK; 754 /* create a new empty context */
713 SAVE (prev, flags); 755 Newz (0, prev->cctx, 1, coro_cctx);
714 LOAD (next); 756 prev->cctx->inuse = 1;
715 UNLOCK; 757 prev->flags &= ~CF_NEW;
716 758 prev->flags |= CF_RUNNING;
717 /* mark this state as in-use */
718 next->mainstack = 0;
719 next->tmps_ix = -2;
720
721 /* stacklevel changed? if yes, grab the stack for us! */
722 if (flags & TRANSFER_SAVE_CCTXT)
723 {
724 if (!prev->stack)
725 allocate_stack (prev, 0);
726 else if (prev->cursp != stacklevel
727 && prev->stack->usecnt > 1)
728 {
729 prev->gencnt = ++prev->stack->gencnt;
730 prev->stack->usecnt = 1;
731 }
732
733 /* has our stack been invalidated? */
734 if (next->stack && next->stack->gencnt != next->gencnt)
735 {
736 deallocate_stack (next);
737 allocate_stack (next, 1);
738 coro_create (&(next->stack->cctx),
739 continue_coro, (void *)next,
740 next->stack->sptr, labs (next->stack->ssize));
741 }
742
743 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
744 prev->cursp = stacklevel;
745 /* don't add any code here */
746 }
747 else
748 next->cursp = stacklevel;
749 } 759 }
750 else if (next->tmps_ix == -2) 760
751 croak ("tried to transfer to running coroutine"); 761 /*TODO: must not croak here */
762 if (!prev->flags & CF_RUNNING)
763 croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
764
765 if (next->flags & CF_RUNNING)
766 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
767
768 if (next->flags & CF_DESTROYED)
769 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
770
771 prev->flags &= ~CF_RUNNING;
772 next->flags |= CF_RUNNING;
773
774 LOCK;
775
776 if (next->flags & CF_NEW)
777 {
778 /* need to start coroutine */
779 next->flags &= ~CF_NEW;
780 /* first get rid of the old state */
781 save_perl (prev);
782 /* setup coroutine call */
783 setup_coro (next);
784 /* need a new stack */
785 assert (!next->cctx);
786 }
752 else 787 else
753 { 788 {
754 LOCK; 789 /* coroutine already started */
755 SAVE (prev, -1); /* first get rid of the old state */ 790 save_perl (prev);
756 UNLOCK; 791 load_perl (next);
757
758 if (flags & TRANSFER_SAVE_CCTXT)
759 {
760 if (!prev->stack)
761 allocate_stack (prev, 0);
762
763 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
764 {
765 PL_top_env = &next->start_env;
766
767 setup_coro (next);
768 next->cursp = stacklevel;
769
770 prev->stack->refcnt++;
771 prev->stack->usecnt++;
772 next->stack = prev->stack;
773 next->gencnt = prev->gencnt;
774 }
775 else
776 {
777 assert (!next->stack);
778 allocate_stack (next, 1);
779 coro_create (&(next->stack->cctx),
780 setup_coro, (void *)next,
781 next->stack->sptr, labs (next->stack->ssize));
782 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
783 prev->cursp = stacklevel;
784 /* don't add any code here */
785 }
786 }
787 else
788 {
789 setup_coro (next);
790 next->cursp = stacklevel;
791 }
792 } 792 }
793 }
794 793
795 LOCK; 794 prev__cctx = prev->cctx;
796 if (coro_mortal) 795
797 { 796 /* possibly "free" the cctx */
798 SvREFCNT_dec (coro_mortal); 797 if (prev__cctx->idle_sp == STACKLEVEL)
798 {
799 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
800 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
801
802 prev->cctx = 0;
803
804 cctx_put (prev__cctx);
805 prev__cctx->inuse = 0;
806 }
807
808 if (!next->cctx)
809 {
810 next->cctx = cctx_get ();
811 assert (!next->cctx->inuse);
812 next->cctx->inuse = 1;
813 }
814
815 if (prev__cctx != next->cctx)
816 {
817 prev__cctx->top_env = PL_top_env;
818 PL_top_env = next->cctx->top_env;
819 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
820 }
821
799 coro_mortal = 0; 822 free_coro_mortal ();
800 }
801 UNLOCK; 823 UNLOCK;
824 }
802} 825}
803 826
804#define SV_CORO(sv,func) \ 827struct transfer_args
805 do { \ 828{
806 if (SvROK (sv)) \ 829 struct coro *prev, *next;
807 sv = SvRV (sv); \ 830};
808 \
809 if (SvTYPE (sv) == SVt_PVHV) \
810 { \
811 HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
812 \
813 if (!he) \
814 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
815 \
816 (sv) = SvRV (HeVAL(he)); \
817 } \
818 \
819 /* must also be changed inside Coro::Cont::yield */ \
820 if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
821 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
822 \
823 } while(0)
824 831
825#define SvSTATE(sv) (struct coro *)SvIV (sv) 832#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
826 833
834/** high level stuff ********************************************************/
835
827static void 836static int
837coro_state_destroy (struct coro *coro)
838{
839 if (coro->flags & CF_DESTROYED)
840 return 0;
841
842 coro->flags |= CF_DESTROYED;
843
844 if (coro->flags & CF_READY)
845 {
846 /* reduce nready, as destroying a ready coro effectively unreadies it */
847 /* alternative: look through all ready queues and remove the coro */
848 LOCK;
849 --coro_nready;
850 UNLOCK;
851 }
852 else
853 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
854
855 if (coro->mainstack && coro->mainstack != main_mainstack)
856 {
857 struct coro temp;
858
859 assert (!(coro->flags & CF_RUNNING));
860
861 Zero (&temp, 1, struct coro);
862 temp.save = CORO_SAVE_ALL;
863
864 if (coro->flags & CF_RUNNING)
865 croak ("FATAL: tried to destroy currently running coroutine");
866
867 save_perl (&temp);
868 load_perl (coro);
869
870 coro_destroy_stacks ();
871
872 load_perl (&temp); /* this will get rid of defsv etc.. */
873
874 coro->mainstack = 0;
875 }
876
877 cctx_destroy (coro->cctx);
878 SvREFCNT_dec (coro->args);
879
880 return 1;
881}
882
883static int
884coro_state_free (pTHX_ SV *sv, MAGIC *mg)
885{
886 struct coro *coro = (struct coro *)mg->mg_ptr;
887 mg->mg_ptr = 0;
888
889 if (--coro->refcnt < 0)
890 {
891 coro_state_destroy (coro);
892 Safefree (coro);
893 }
894
895 return 0;
896}
897
898static int
899coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
900{
901 struct coro *coro = (struct coro *)mg->mg_ptr;
902
903 ++coro->refcnt;
904
905 return 0;
906}
907
908static MGVTBL coro_state_vtbl = {
909 0, 0, 0, 0,
910 coro_state_free,
911 0,
912#ifdef MGf_DUP
913 coro_state_dup,
914#else
915# define MGf_DUP 0
916#endif
917};
918
919static struct coro *
920SvSTATE (SV *coro)
921{
922 HV *stash;
923 MAGIC *mg;
924
925 if (SvROK (coro))
926 coro = SvRV (coro);
927
928 stash = SvSTASH (coro);
929 if (stash != coro_stash && stash != coro_state_stash)
930 {
931 /* very slow, but rare, check */
932 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
933 croak ("Coro::State object required");
934 }
935
936 mg = CORO_MAGIC (coro);
937 return (struct coro *)mg->mg_ptr;
938}
939
940static void
941prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
942{
943 ta->prev = SvSTATE (prev_sv);
944 ta->next = SvSTATE (next_sv);
945}
946
947static void
828api_transfer(pTHX_ SV *prev, SV *next, int flags) 948api_transfer (SV *prev_sv, SV *next_sv)
829{ 949{
830 SV_CORO (prev, "Coro::transfer"); 950 struct transfer_args ta;
831 SV_CORO (next, "Coro::transfer");
832 951
833 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 952 prepare_transfer (&ta, prev_sv, next_sv);
953 TRANSFER (ta);
954}
955
956static int
957api_save (SV *coro_sv, int new_save)
958{
959 struct coro *coro = SvSTATE (coro_sv);
960 int old_save = coro->save;
961
962 if (new_save >= 0)
963 coro->save = new_save;
964
965 return old_save;
834} 966}
835 967
836/** Coro ********************************************************************/ 968/** Coro ********************************************************************/
837 969
838#define PRIO_MAX 3
839#define PRIO_HIGH 1
840#define PRIO_NORMAL 0
841#define PRIO_LOW -1
842#define PRIO_IDLE -3
843#define PRIO_MIN -4
844
845/* for Coro.pm */
846static GV *coro_current, *coro_idle;
847static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
848static int coro_nready;
849
850static void 970static void
851coro_enq (pTHX_ SV *sv) 971coro_enq (SV *coro_sv)
852{ 972{
853 if (SvTYPE (sv) == SVt_PVHV)
854 {
855 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
856 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
857
858 prio = prio > PRIO_MAX ? PRIO_MAX
859 : prio < PRIO_MIN ? PRIO_MIN
860 : prio;
861
862 av_push (coro_ready [prio - PRIO_MIN], sv); 973 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
863 coro_nready++;
864
865 return;
866 }
867
868 croak ("Coro::ready tried to enqueue something that is not a coroutine");
869} 974}
870 975
871static SV * 976static SV *
872coro_deq (pTHX_ int min_prio) 977coro_deq (int min_prio)
873{ 978{
874 int prio = PRIO_MAX - PRIO_MIN; 979 int prio = PRIO_MAX - PRIO_MIN;
875 980
876 min_prio -= PRIO_MIN; 981 min_prio -= PRIO_MIN;
877 if (min_prio < 0) 982 if (min_prio < 0)
878 min_prio = 0; 983 min_prio = 0;
879 984
880 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 985 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
881 if (av_len (coro_ready[prio]) >= 0) 986 if (AvFILLp (coro_ready [prio]) >= 0)
882 {
883 coro_nready--;
884 return av_shift (coro_ready[prio]); 987 return av_shift (coro_ready [prio]);
885 }
886 988
887 return 0; 989 return 0;
888} 990}
889 991
890static void 992static int
891api_ready (SV *coro) 993api_ready (SV *coro_sv)
892{ 994{
893 dTHX; 995 struct coro *coro;
894 996
895 if (SvROK (coro)) 997 if (SvROK (coro_sv))
896 coro = SvRV (coro); 998 coro_sv = SvRV (coro_sv);
999
1000 coro = SvSTATE (coro_sv);
1001
1002 if (coro->flags & CF_READY)
1003 return 0;
1004
1005 coro->flags |= CF_READY;
897 1006
898 LOCK; 1007 LOCK;
899 coro_enq (aTHX_ SvREFCNT_inc (coro)); 1008 coro_enq (SvREFCNT_inc (coro_sv));
1009 ++coro_nready;
900 UNLOCK; 1010 UNLOCK;
1011
1012 return 1;
1013}
1014
1015static int
1016api_is_ready (SV *coro_sv)
1017{
1018 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1019}
1020
1021static void
1022prepare_schedule (struct transfer_args *ta)
1023{
1024 SV *prev_sv, *next_sv;
1025
1026 for (;;)
1027 {
1028 LOCK;
1029 next_sv = coro_deq (PRIO_MIN);
1030
1031 /* nothing to schedule: call the idle handler */
1032 if (!next_sv)
1033 {
1034 dSP;
1035 UNLOCK;
1036
1037 ENTER;
1038 SAVETMPS;
1039
1040 PUSHMARK (SP);
1041 PUTBACK;
1042 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1043
1044 FREETMPS;
1045 LEAVE;
1046 continue;
1047 }
1048
1049 ta->next = SvSTATE (next_sv);
1050
1051 /* cannot transfer to destroyed coros, skip and look for next */
1052 if (ta->next->flags & CF_DESTROYED)
1053 {
1054 UNLOCK;
1055 SvREFCNT_dec (next_sv);
1056 /* coro_nready is already taken care of by destroy */
1057 continue;
1058 }
1059
1060 --coro_nready;
1061 UNLOCK;
1062 break;
1063 }
1064
1065 /* free this only after the transfer */
1066 prev_sv = SvRV (coro_current);
1067 SvRV_set (coro_current, next_sv);
1068 ta->prev = SvSTATE (prev_sv);
1069
1070 assert (ta->next->flags & CF_READY);
1071 ta->next->flags &= ~CF_READY;
1072
1073 LOCK;
1074 free_coro_mortal ();
1075 coro_mortal = prev_sv;
1076 UNLOCK;
1077}
1078
1079static void
1080prepare_cede (struct transfer_args *ta)
1081{
1082 api_ready (coro_current);
1083 prepare_schedule (ta);
1084}
1085
1086static int
1087prepare_cede_notself (struct transfer_args *ta)
1088{
1089 if (coro_nready)
1090 {
1091 SV *prev = SvRV (coro_current);
1092 prepare_schedule (ta);
1093 api_ready (prev);
1094 return 1;
1095 }
1096 else
1097 return 0;
901} 1098}
902 1099
903static void 1100static void
904api_schedule (void) 1101api_schedule (void)
905{ 1102{
906 dTHX; 1103 struct transfer_args ta;
907 1104
908 SV *prev, *next; 1105 prepare_schedule (&ta);
909 1106 TRANSFER (ta);
910 LOCK;
911
912 prev = SvRV (GvSV (coro_current));
913 next = coro_deq (aTHX_ PRIO_MIN);
914
915 if (!next)
916 next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
917
918 /* free this only after the transfer */
919 coro_mortal = prev;
920 SV_CORO (prev, "Coro::schedule");
921
922 SvRV (GvSV (coro_current)) = next;
923
924 SV_CORO (next, "Coro::schedule");
925
926 UNLOCK;
927
928 transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
929 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
930} 1107}
931 1108
932static void 1109static int
933api_cede (void) 1110api_cede (void)
934{ 1111{
935 dTHX; 1112 struct transfer_args ta;
936 1113
937 LOCK; 1114 prepare_cede (&ta);
938 coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
939 UNLOCK;
940 1115
941 api_schedule (); 1116 if (ta.prev != ta.next)
1117 {
1118 TRANSFER (ta);
1119 return 1;
1120 }
1121 else
1122 return 0;
1123}
1124
1125static int
1126api_cede_notself (void)
1127{
1128 struct transfer_args ta;
1129
1130 if (prepare_cede_notself (&ta))
1131 {
1132 TRANSFER (ta);
1133 return 1;
1134 }
1135 else
1136 return 0;
942} 1137}
943 1138
944MODULE = Coro::State PACKAGE = Coro::State 1139MODULE = Coro::State PACKAGE = Coro::State
945 1140
946PROTOTYPES: ENABLE 1141PROTOTYPES: DISABLE
947 1142
948BOOT: 1143BOOT:
949{ /* {} necessary for stoopid perl-5.6.x */ 1144{
950#ifdef USE_ITHREADS 1145#ifdef USE_ITHREADS
951 MUTEX_INIT (&coro_mutex); 1146 MUTEX_INIT (&coro_mutex);
952#endif 1147#endif
1148 BOOT_PAGESIZE;
953 1149
954 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
955 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
956 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1150 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
957 1151
958 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1152 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
959 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1153 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
960 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1154 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1155 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
961 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1156 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
962 1157
963 main_mainstack = PL_mainstack; 1158 main_mainstack = PL_mainstack;
964 1159
965 coroapi.ver = CORO_API_VERSION; 1160 coroapi.ver = CORO_API_VERSION;
966 coroapi.transfer = api_transfer; 1161 coroapi.transfer = api_transfer;
967}
968 1162
969Coro::State 1163 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
970_newprocess(args) 1164}
971 SV * args 1165
972 PROTOTYPE: $ 1166SV *
1167new (char *klass, ...)
973 CODE: 1168 CODE:
974 Coro__State coro; 1169{
1170 struct coro *coro;
1171 HV *hv;
1172 int i;
975 1173
976 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
977 croak ("Coro::State::_newprocess expects an arrayref");
978
979 Newz (0, coro, 1, struct coro); 1174 Newz (0, coro, 1, struct coro);
1175 coro->args = newAV ();
1176 coro->save = CORO_SAVE_ALL;
1177 coro->flags = CF_NEW;
980 1178
981 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1179 hv = newHV ();
982 coro->mainstack = 0; /* actual work is done inside transfer */ 1180 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
983 coro->stack = 0; 1181 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
984 1182
985 /* same as JMPENV_BOOTSTRAP */ 1183 for (i = 1; i < items; i++)
986 /* we might be able to recycle start_env, but safe is safe */ 1184 av_push (coro->args, newSVsv (ST (i)));
987 //Zero(&coro->start_env, 1, JMPENV); 1185}
988 coro->start_env.je_ret = -1;
989 coro->start_env.je_mustcatch = TRUE;
990
991 RETVAL = coro;
992 OUTPUT: 1186 OUTPUT:
993 RETVAL 1187 RETVAL
994 1188
1189int
1190save (SV *coro, int new_save = -1)
1191 CODE:
1192 RETVAL = api_save (coro, new_save);
1193 OUTPUT:
1194 RETVAL
1195
995void 1196void
996transfer(prev, next, flags) 1197_set_stacklevel (...)
997 SV *prev 1198 ALIAS:
998 SV *next 1199 Coro::State::transfer = 1
999 int flags 1200 Coro::schedule = 2
1000 PROTOTYPE: @ 1201 Coro::cede = 3
1202 Coro::cede_notself = 4
1001 CODE: 1203 CODE:
1002 PUTBACK; 1204{
1003 SV_CORO (next, "Coro::transfer"); 1205 struct transfer_args ta;
1004 SV_CORO (prev, "Coro::transfer"); 1206
1005 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1207 switch (ix)
1006 SPAGAIN; 1208 {
1209 case 0:
1210 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1211 ta.next = 0;
1212 break;
1213
1214 case 1:
1215 if (items != 2)
1216 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1217
1218 prepare_transfer (&ta, ST (0), ST (1));
1219 break;
1220
1221 case 2:
1222 prepare_schedule (&ta);
1223 break;
1224
1225 case 3:
1226 prepare_cede (&ta);
1227 break;
1228
1229 case 4:
1230 if (!prepare_cede_notself (&ta))
1231 XSRETURN_EMPTY;
1232
1233 break;
1234 }
1235
1236 BARRIER;
1237 TRANSFER (ta);
1238
1239 if (GIMME_V != G_VOID && ta.next != ta.prev)
1240 XSRETURN_YES;
1241}
1242
1243bool
1244_destroy (SV *coro_sv)
1245 CODE:
1246 RETVAL = coro_state_destroy (SvSTATE (coro_sv));
1247 OUTPUT:
1248 RETVAL
1007 1249
1008void 1250void
1009DESTROY(coro)
1010 Coro::State coro
1011 CODE:
1012
1013 if (coro->mainstack && coro->mainstack != main_mainstack)
1014 {
1015 struct coro temp;
1016
1017 PUTBACK;
1018 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
1019 LOAD(aTHX_ coro);
1020 SPAGAIN;
1021
1022 destroy_stacks (aTHX);
1023
1024 LOAD((&temp)); /* this will get rid of defsv etc.. */
1025 SPAGAIN;
1026
1027 coro->mainstack = 0;
1028 }
1029
1030 deallocate_stack (coro);
1031 SvREFCNT_dec (coro->args);
1032 Safefree (coro);
1033
1034void
1035_exit(code) 1251_exit (code)
1036 int code 1252 int code
1037 PROTOTYPE: $ 1253 PROTOTYPE: $
1038 CODE: 1254 CODE:
1039 _exit (code); 1255 _exit (code);
1040 1256
1041MODULE = Coro::State PACKAGE = Coro::Cont 1257int
1258cctx_stacksize (int new_stacksize = 0)
1259 CODE:
1260 RETVAL = coro_stacksize;
1261 if (new_stacksize)
1262 coro_stacksize = new_stacksize;
1263 OUTPUT:
1264 RETVAL
1042 1265
1043# this is slightly dirty (should expose a c-level api) 1266int
1267cctx_count ()
1268 CODE:
1269 RETVAL = cctx_count;
1270 OUTPUT:
1271 RETVAL
1044 1272
1045void 1273int
1046yield(...) 1274cctx_idle ()
1047 PROTOTYPE: @ 1275 CODE:
1048 CODE: 1276 RETVAL = cctx_idle;
1049 static SV *returnstk; 1277 OUTPUT:
1050 SV *sv; 1278 RETVAL
1051 AV *defav = GvAV (PL_defgv);
1052 struct coro *prev, *next;
1053
1054 if (!returnstk)
1055 returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1056
1057 /* set up @_ -- ugly */
1058 av_clear (defav);
1059 av_fill (defav, items - 1);
1060 while (items--)
1061 av_store (defav, items, SvREFCNT_inc (ST(items)));
1062
1063 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1064 sv = av_pop ((AV *)SvRV (returnstk));
1065 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1066 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1067 SvREFCNT_dec (sv);
1068
1069 transfer(aTHX_ prev, next, 0);
1070 1279
1071MODULE = Coro::State PACKAGE = Coro 1280MODULE = Coro::State PACKAGE = Coro
1072 1281
1073# this is slightly dirty (should expose a c-level api)
1074
1075BOOT: 1282BOOT:
1076{ 1283{
1077 int i; 1284 int i;
1285
1078 HV *stash = gv_stashpv ("Coro", TRUE); 1286 coro_stash = gv_stashpv ("Coro", TRUE);
1079 1287
1080 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1288 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1081 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1289 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1082 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1290 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1083 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1291 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1084 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1292 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1085 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1293 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1086 1294
1087 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV); 1295 coro_current = get_sv ("Coro::current", FALSE);
1088 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV); 1296 SvREADONLY_on (coro_current);
1089 1297
1090 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1298 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1091 coro_ready[i] = newAV (); 1299 coro_ready[i] = newAV ();
1092 1300
1093 { 1301 {
1094 SV *sv = perl_get_sv("Coro::API", 1); 1302 SV *sv = perl_get_sv("Coro::API", 1);
1095 1303
1096 coroapi.schedule = api_schedule; 1304 coroapi.schedule = api_schedule;
1305 coroapi.save = api_save;
1097 coroapi.cede = api_cede; 1306 coroapi.cede = api_cede;
1307 coroapi.cede_notself = api_cede_notself;
1098 coroapi.ready = api_ready; 1308 coroapi.ready = api_ready;
1309 coroapi.is_ready = api_is_ready;
1099 coroapi.nready = &coro_nready; 1310 coroapi.nready = &coro_nready;
1100 coroapi.current = coro_current; 1311 coroapi.current = coro_current;
1101 1312
1102 GCoroAPI = &coroapi; 1313 GCoroAPI = &coroapi;
1103 sv_setiv(sv, (IV)&coroapi); 1314 sv_setiv (sv, (IV)&coroapi);
1104 SvREADONLY_on(sv); 1315 SvREADONLY_on (sv);
1105 } 1316 }
1106} 1317}
1107 1318
1108#if !PERL_MICRO
1109
1110void 1319void
1111ready(self) 1320_set_current (SV *current)
1112 SV * self
1113 PROTOTYPE: $ 1321 PROTOTYPE: $
1114 CODE: 1322 CODE:
1115 api_ready (self); 1323 SvREFCNT_dec (SvRV (coro_current));
1116 1324 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1117#endif
1118 1325
1119int 1326int
1327prio (Coro::State coro, int newprio = 0)
1328 ALIAS:
1329 nice = 1
1330 CODE:
1331{
1332 RETVAL = coro->prio;
1333
1334 if (items > 1)
1335 {
1336 if (ix)
1337 newprio = coro->prio - newprio;
1338
1339 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1340 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1341
1342 coro->prio = newprio;
1343 }
1344}
1345 OUTPUT:
1346 RETVAL
1347
1348SV *
1349ready (SV *self)
1350 PROTOTYPE: $
1351 CODE:
1352 RETVAL = boolSV (api_ready (self));
1353 OUTPUT:
1354 RETVAL
1355
1356SV *
1357is_ready (SV *self)
1358 PROTOTYPE: $
1359 CODE:
1360 RETVAL = boolSV (api_is_ready (self));
1361 OUTPUT:
1362 RETVAL
1363
1364int
1120nready(...) 1365nready (...)
1121 PROTOTYPE: 1366 PROTOTYPE:
1122 CODE: 1367 CODE:
1123 RETVAL = coro_nready; 1368 RETVAL = coro_nready;
1124 OUTPUT: 1369 OUTPUT:
1125 RETVAL 1370 RETVAL
1126 1371
1372MODULE = Coro::State PACKAGE = Coro::AIO
1373
1374SV *
1375_get_state ()
1376 CODE:
1377{
1378 struct io_state *data;
1379
1380 RETVAL = newSV (sizeof (struct io_state));
1381 data = (struct io_state *)SvPVX (RETVAL);
1382 SvCUR_set (RETVAL, sizeof (struct io_state));
1383 SvPOK_only (RETVAL);
1384
1385 data->errorno = errno;
1386 data->laststype = PL_laststype;
1387 data->laststatval = PL_laststatval;
1388 data->statcache = PL_statcache;
1389}
1390 OUTPUT:
1391 RETVAL
1392
1127void 1393void
1128schedule(...) 1394_set_state (char *data_)
1129 PROTOTYPE: 1395 PROTOTYPE: $
1130 CODE: 1396 CODE:
1131 api_schedule (); 1397{
1398 struct io_state *data = (void *)data_;
1132 1399
1133void 1400 errno = data->errorno;
1134cede(...) 1401 PL_laststype = data->laststype;
1135 PROTOTYPE: 1402 PL_laststatval = data->laststatval;
1136 CODE: 1403 PL_statcache = data->statcache;
1137 api_cede (); 1404}
1138 1405

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