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Comparing Coro/Coro/State.xs (file contents):
Revision 1.8 by root, Thu Jul 19 04:13:22 2001 UTC vs.
Revision 1.182 by root, Wed Oct 3 18:37:48 2007 UTC

1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4
1#include "EXTERN.h" 5#include "EXTERN.h"
2#include "perl.h" 6#include "perl.h"
3#include "XSUB.h" 7#include "XSUB.h"
4 8
5#if 1 9#include "patchlevel.h"
6# define CHK(x) (void *)0 10
11#include <stdio.h>
12#include <errno.h>
13#include <assert.h>
14
15#ifdef HAVE_MMAP
16# include <unistd.h>
17# include <sys/mman.h>
18# ifndef MAP_ANONYMOUS
19# ifdef MAP_ANON
20# define MAP_ANONYMOUS MAP_ANON
21# else
22# undef HAVE_MMAP
23# endif
24# endif
25# include <limits.h>
26# ifndef PAGESIZE
27# define PAGESIZE pagesize
28# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
29static long pagesize;
30# else
31# define BOOT_PAGESIZE (void)0
32# endif
7#else 33#else
8# define CHK(x) if (!(x)) croak("FATAL, CHK: " #x) 34# define PAGESIZE 0
35# define BOOT_PAGESIZE (void)0
36#endif
37
38#if CORO_USE_VALGRIND
39# include <valgrind/valgrind.h>
40# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
41#else
42# define REGISTER_STACK(cctx,start,end)
43#endif
44
45/* the maximum number of idle cctx that will be pooled */
46#define MAX_IDLE_CCTX 8
47
48#define PERL_VERSION_ATLEAST(a,b,c) \
49 (PERL_REVISION > (a) \
50 || (PERL_REVISION == (a) \
51 && (PERL_VERSION > (b) \
52 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
53
54#if !PERL_VERSION_ATLEAST (5,6,0)
55# ifndef PL_ppaddr
56# define PL_ppaddr ppaddr
9#endif 57# endif
58# ifndef call_sv
59# define call_sv perl_call_sv
60# endif
61# ifndef get_sv
62# define get_sv perl_get_sv
63# endif
64# ifndef get_cv
65# define get_cv perl_get_cv
66# endif
67# ifndef IS_PADGV
68# define IS_PADGV(v) 0
69# endif
70# ifndef IS_PADCONST
71# define IS_PADCONST(v) 0
72# endif
73#endif
10 74
11#define MAY_FLUSH /* increases codesize */ 75/* 5.8.7 */
76#ifndef SvRV_set
77# define SvRV_set(s,v) SvRV(s) = (v)
78#endif
12 79
13#define SUB_INIT "Coro::State::_newcoro" 80#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
81# undef CORO_STACKGUARD
82#endif
14 83
15#define SAVE_DEFAV 0x00000001 84#ifndef CORO_STACKGUARD
16#define SAVE_DEFSV 0x00000002 85# define CORO_STACKGUARD 0
17#define SAVE_ERRSV 0x00000004 86#endif
18 87
19#define SAVE_ALL -1 88/* prefer perl internal functions over our own? */
89#ifndef CORO_PREFER_PERL_FUNCTIONS
90# define CORO_PREFER_PERL_FUNCTIONS 0
91#endif
20 92
93/* The next macros try to return the current stack pointer, in an as
94 * portable way as possible. */
95#define dSTACKLEVEL volatile char stacklevel
96#define STACKLEVEL ((void *)&stacklevel)
97
98#define IN_DESTRUCT (PL_main_cv == Nullcv)
99
100#if __GNUC__ >= 3
101# define attribute(x) __attribute__(x)
102# define BARRIER __asm__ __volatile__ ("" : : : "memory")
103#else
104# define attribute(x)
105# define BARRIER
106#endif
107
108#define NOINLINE attribute ((noinline))
109
110#include "CoroAPI.h"
111
112#ifdef USE_ITHREADS
113static perl_mutex coro_mutex;
114# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
115# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
116#else
117# define LOCK (void)0
118# define UNLOCK (void)0
119#endif
120
121/* helper storage struct for Coro::AIO */
122struct io_state
123{
124 int errorno;
125 I32 laststype;
126 int laststatval;
127 Stat_t statcache;
128};
129
130static size_t coro_stacksize = CORO_STACKSIZE;
131static struct CoroAPI coroapi;
132static AV *main_mainstack; /* used to differentiate between $main and others */
133static JMPENV *main_top_env;
134static HV *coro_state_stash, *coro_stash;
135static SV *coro_mortal; /* will be freed after next transfer */
136
137static GV *irsgv; /* $/ */
138
139/* async_pool helper stuff */
140static SV *sv_pool_rss;
141static SV *sv_pool_size;
142static AV *av_async_pool;
143
144static struct coro_cctx *cctx_first;
145static int cctx_count, cctx_idle;
146
147enum {
148 CC_MAPPED = 0x01,
149 CC_NOREUSE = 0x02, /* throw this away after tracing */
150 CC_TRACE = 0x04,
151 CC_TRACE_SUB = 0x08, /* trace sub calls */
152 CC_TRACE_LINE = 0x10, /* trace each statement */
153 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
154};
155
156/* this is a structure representing a c-level coroutine */
157typedef struct coro_cctx {
158 struct coro_cctx *next;
159
160 /* the stack */
161 void *sptr;
162 size_t ssize;
163
164 /* cpu state */
165 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
166 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
167 JMPENV *top_env;
168 coro_context cctx;
169
170#if CORO_USE_VALGRIND
171 int valgrind_id;
172#endif
173 unsigned char flags;
174} coro_cctx;
175
176enum {
177 CF_RUNNING = 0x0001, /* coroutine is running */
178 CF_READY = 0x0002, /* coroutine is ready */
179 CF_NEW = 0x0004, /* has never been switched to */
180 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
181};
182
183/* this is a structure representing a perl-level coroutine */
21struct coro { 184struct coro {
22 /* optionally saved, might be zero */ 185 /* the c coroutine allocated to this perl coroutine, if any */
23 AV *defav; 186 coro_cctx *cctx;
24 SV *defsv;
25 SV *errsv;
26
27 /* saved global state not related to stacks */
28 U8 dowarn;
29
30 /* the stacks and related info (callchain etc..) */
31 PERL_SI *curstackinfo;
32 AV *curstack;
33 AV *mainstack;
34 SV **stack_sp;
35 OP *op;
36 SV **curpad;
37 SV **stack_base;
38 SV **stack_max;
39 SV **tmps_stack;
40 I32 tmps_floor;
41 I32 tmps_ix;
42 I32 tmps_max;
43 I32 *markstack;
44 I32 *markstack_ptr;
45 I32 *markstack_max;
46 I32 *scopestack;
47 I32 scopestack_ix;
48 I32 scopestack_max;
49 ANY *savestack;
50 I32 savestack_ix;
51 I32 savestack_max;
52 OP **retstack;
53 I32 retstack_ix;
54 I32 retstack_max;
55 COP *curcop;
56 187
57 /* data associated with this coroutine (initial args) */ 188 /* data associated with this coroutine (initial args) */
58 AV *args; 189 AV *args;
190 int refcnt;
191 int flags; /* CF_ flags */
192
193 /* optionally saved, might be zero */
194 AV *defav; /* @_ */
195 SV *defsv; /* $_ */
196 SV *errsv; /* $@ */
197 GV *deffh; /* default filehandle */
198 SV *irssv; /* $/ */
199 SV *irssv_sv; /* real $/ cache */
200
201#define VAR(name,type) type name;
202# include "state.h"
203#undef VAR
204
205 /* statistics */
206 int usecount; /* number of transfers to this coro */
207
208 /* coro process data */
209 int prio;
210 //SV *throw;
211
212 /* async_pool */
213 GV *asp_deffh;
214
215 /* linked list */
216 struct coro *next, *prev;
217 HV *hv; /* the perl hash associated with this coro, if any */
59}; 218};
60 219
61typedef struct coro *Coro__State; 220typedef struct coro *Coro__State;
62typedef struct coro *Coro__State_or_hashref; 221typedef struct coro *Coro__State_or_hashref;
63 222
64static HV *padlist_cache; 223/** Coro ********************************************************************/
65 224
66/* mostly copied from op.c:cv_clone2 */ 225#define PRIO_MAX 3
67STATIC AV * 226#define PRIO_HIGH 1
68clone_padlist (AV *protopadlist) 227#define PRIO_NORMAL 0
228#define PRIO_LOW -1
229#define PRIO_IDLE -3
230#define PRIO_MIN -4
231
232/* for Coro.pm */
233static SV *coro_current;
234static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
235static int coro_nready;
236static struct coro *coro_first;
237
238/** lowlevel stuff **********************************************************/
239
240static AV *
241coro_clone_padlist (pTHX_ CV *cv)
69{ 242{
70 AV *av; 243 AV *padlist = CvPADLIST (cv);
71 I32 ix;
72 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
73 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
74 SV **pname = AvARRAY (protopad_name);
75 SV **ppad = AvARRAY (protopad);
76 I32 fname = AvFILLp (protopad_name);
77 I32 fpad = AvFILLp (protopad);
78 AV *newpadlist, *newpad_name, *newpad; 244 AV *newpadlist, *newpad;
79 SV **npad;
80
81 newpad_name = newAV ();
82 for (ix = fname; ix >= 0; ix--)
83 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
84
85 newpad = newAV ();
86 av_fill (newpad, AvFILLp (protopad));
87 npad = AvARRAY (newpad);
88 245
89 newpadlist = newAV (); 246 newpadlist = newAV ();
90 AvREAL_off (newpadlist); 247 AvREAL_off (newpadlist);
91 av_store (newpadlist, 0, (SV *) newpad_name); 248#if PERL_VERSION_ATLEAST (5,9,0)
249 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
250#else
251 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
252#endif
253 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
254 --AvFILLp (padlist);
255
256 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
92 av_store (newpadlist, 1, (SV *) newpad); 257 av_store (newpadlist, 1, (SV *)newpad);
93 258
94 av = newAV (); /* will be @_ */ 259 return newpadlist;
95 av_extend (av, 0); 260}
96 av_store (newpad, 0, (SV *) av);
97 AvFLAGS (av) = AVf_REIFY;
98 261
99 for (ix = fpad; ix > 0; ix--) 262static void
263free_padlist (pTHX_ AV *padlist)
264{
265 /* may be during global destruction */
266 if (SvREFCNT (padlist))
100 { 267 {
101 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 268 I32 i = AvFILLp (padlist);
102 if (namesv && namesv != &PL_sv_undef) 269 while (i >= 0)
103 { 270 {
104 char *name = SvPVX (namesv); /* XXX */ 271 SV **svp = av_fetch (padlist, i--, FALSE);
105 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 272 if (svp)
106 { /* lexical from outside? */
107 npad[ix] = SvREFCNT_inc (ppad[ix]);
108 } 273 {
109 else
110 { /* our own lexical */
111 SV *sv; 274 SV *sv;
112 if (*name == '&') 275 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
113 sv = SvREFCNT_inc (ppad[ix]); 276 SvREFCNT_dec (sv);
114 else if (*name == '@') 277
115 sv = (SV *) newAV (); 278 SvREFCNT_dec (*svp);
116 else if (*name == '%')
117 sv = (SV *) newHV ();
118 else
119 sv = NEWSV (0, 0);
120 if (!SvPADBUSY (sv))
121 SvPADMY_on (sv);
122 npad[ix] = sv;
123 } 279 }
124 } 280 }
125 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
126 {
127 npad[ix] = SvREFCNT_inc (ppad[ix]);
128 }
129 else
130 {
131 SV *sv = NEWSV (0, 0);
132 SvPADTMP_on (sv);
133 npad[ix] = sv;
134 }
135 }
136 281
137#if 0 /* return -ENOTUNDERSTOOD */
138 /* Now that vars are all in place, clone nested closures. */
139
140 for (ix = fpad; ix > 0; ix--) {
141 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
142 if (namesv
143 && namesv != &PL_sv_undef
144 && !(SvFLAGS(namesv) & SVf_FAKE)
145 && *SvPVX(namesv) == '&'
146 && CvCLONE(ppad[ix]))
147 {
148 CV *kid = cv_clone((CV*)ppad[ix]);
149 SvREFCNT_dec(ppad[ix]);
150 CvCLONE_on(kid);
151 SvPADMY_on(kid);
152 npad[ix] = (SV*)kid;
153 }
154 }
155#endif
156
157 return newpadlist;
158}
159
160#ifdef MAY_FLUSH
161STATIC AV *
162free_padlist (AV *padlist)
163{
164 /* may be during global destruction */
165 if (SvREFCNT(padlist))
166 {
167 I32 i = AvFILLp(padlist);
168 while (i >= 0)
169 {
170 SV **svp = av_fetch(padlist, i--, FALSE);
171 SV *sv = svp ? *svp : Nullsv;
172 if (sv)
173 SvREFCNT_dec(sv);
174 }
175
176 SvREFCNT_dec((SV*)padlist); 282 SvREFCNT_dec ((SV*)padlist);
177 } 283 }
178} 284}
179#endif 285
286static int
287coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
288{
289 AV *padlist;
290 AV *av = (AV *)mg->mg_obj;
291
292 /* casting is fun. */
293 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
294 free_padlist (aTHX_ padlist);
295
296 SvREFCNT_dec (av);
297
298 return 0;
299}
300
301#define PERL_MAGIC_coro PERL_MAGIC_ext
302
303static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
304
305#define CORO_MAGIC(cv) \
306 SvMAGIC (cv) \
307 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
308 ? SvMAGIC (cv) \
309 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
310 : 0
311
312static struct coro *
313SvSTATE_ (pTHX_ SV *coro)
314{
315 HV *stash;
316 MAGIC *mg;
317
318 if (SvROK (coro))
319 coro = SvRV (coro);
320
321 if (SvTYPE (coro) != SVt_PVHV)
322 croak ("Coro::State object required");
323
324 stash = SvSTASH (coro);
325 if (stash != coro_stash && stash != coro_state_stash)
326 {
327 /* very slow, but rare, check */
328 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
329 croak ("Coro::State object required");
330 }
331
332 mg = CORO_MAGIC (coro);
333 return (struct coro *)mg->mg_ptr;
334}
335
336#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
180 337
181/* the next two functions merely cache the padlists */ 338/* the next two functions merely cache the padlists */
182STATIC void 339static void
183get_padlist (CV *cv) 340get_padlist (pTHX_ CV *cv)
184{ 341{
185 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0); 342 MAGIC *mg = CORO_MAGIC (cv);
343 AV *av;
186 344
187 if (he && AvFILLp ((AV *)*he) >= 0) 345 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
188 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he); 346 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
189 else 347 else
190 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
191}
192
193STATIC void
194put_padlist (CV *cv)
195{
196 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
197
198 if (SvTYPE (*he) != SVt_PVAV)
199 { 348 {
349#if CORO_PREFER_PERL_FUNCTIONS
350 /* this is probably cleaner, but also slower? */
351 CV *cp = Perl_cv_clone (cv);
352 CvPADLIST (cv) = CvPADLIST (cp);
353 CvPADLIST (cp) = 0;
200 SvREFCNT_dec (*he); 354 SvREFCNT_dec (cp);
201 *he = (SV *)newAV (); 355#else
356 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
357#endif
202 } 358 }
203
204 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
205} 359}
206 360
207#ifdef MAY_FLUSH 361static void
208STATIC void 362put_padlist (pTHX_ CV *cv)
209flush_padlist_cache ()
210{ 363{
211 HV *hv = padlist_cache; 364 MAGIC *mg = CORO_MAGIC (cv);
212 padlist_cache = newHV (); 365 AV *av;
213 366
214 if (hv_iterinit (hv)) 367 if (!mg)
215 {
216 HE *he;
217 AV *padlist;
218
219 while (!!(he = hv_iternext (hv)))
220 {
221 AV *av = (AV *)HeVAL(he);
222
223 /* casting is fun. */
224 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
225 free_padlist (padlist);
226 }
227 } 368 {
369 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
370 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
371 mg->mg_virtual = &vtbl_coro;
372 mg->mg_obj = (SV *)newAV ();
373 }
228 374
229 SvREFCNT_dec (hv); 375 av = (AV *)mg->mg_obj;
230}
231#endif
232 376
233#define SB do { 377 if (AvFILLp (av) >= AvMAX (av))
234#define SE } while (0) 378 av_extend (av, AvMAX (av) + 1);
235 379
236#define LOAD(state) SB load_state(aTHX_ state); SPAGAIN; SE 380 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
237#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ state,flags); SE 381}
238 382
239#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE 383/** load & save, init *******************************************************/
240 384
241static void 385static void
242load_state(pTHX_ Coro__State c) 386load_perl (pTHX_ Coro__State c)
243{ 387{
244 PL_dowarn = c->dowarn; 388#define VAR(name,type) PL_ ## name = c->name;
389# include "state.h"
390#undef VAR
245 391
246 PL_curstackinfo = c->curstackinfo; 392 GvSV (PL_defgv) = c->defsv;
247 PL_curstack = c->curstack; 393 GvAV (PL_defgv) = c->defav;
248 PL_mainstack = c->mainstack; 394 GvSV (PL_errgv) = c->errsv;
249 PL_stack_sp = c->stack_sp; 395 PL_defoutgv = c->deffh;
250 PL_op = c->op; 396 PL_rs = c->irssv;
251 PL_curpad = c->curpad; 397 GvSV (irsgv) = c->irssv_sv;
252 PL_stack_base = c->stack_base;
253 PL_stack_max = c->stack_max;
254 PL_tmps_stack = c->tmps_stack;
255 PL_tmps_floor = c->tmps_floor;
256 PL_tmps_ix = c->tmps_ix;
257 PL_tmps_max = c->tmps_max;
258 PL_markstack = c->markstack;
259 PL_markstack_ptr = c->markstack_ptr;
260 PL_markstack_max = c->markstack_max;
261 PL_scopestack = c->scopestack;
262 PL_scopestack_ix = c->scopestack_ix;
263 PL_scopestack_max = c->scopestack_max;
264 PL_savestack = c->savestack;
265 PL_savestack_ix = c->savestack_ix;
266 PL_savestack_max = c->savestack_max;
267 PL_retstack = c->retstack;
268 PL_retstack_ix = c->retstack_ix;
269 PL_retstack_max = c->retstack_max;
270 PL_curcop = c->curcop;
271
272 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
273 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
274 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
275 398
276 { 399 {
277 dSP; 400 dSP;
278 CV *cv; 401 CV *cv;
279 402
280 /* now do the ugly restore mess */ 403 /* now do the ugly restore mess */
281 while ((cv = (CV *)POPs)) 404 while ((cv = (CV *)POPs))
282 { 405 {
283 AV *padlist = (AV *)POPs;
284
285 if (padlist)
286 {
287 put_padlist (cv); /* mark this padlist as available */ 406 put_padlist (aTHX_ cv); /* mark this padlist as available */
288 CvPADLIST(cv) = padlist; 407 CvDEPTH (cv) = PTR2IV (POPs);
289#ifdef USE_THREADS 408 CvPADLIST (cv) = (AV *)POPs;
290 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
291#endif
292 }
293
294 ++CvDEPTH(cv);
295 } 409 }
296 410
297 PUTBACK; 411 PUTBACK;
298 } 412 }
299} 413}
300 414
301static void 415static void
302save_state(pTHX_ Coro__State c, int flags) 416save_perl (pTHX_ Coro__State c)
303{ 417{
304 { 418 {
305 dSP; 419 dSP;
306 I32 cxix = cxstack_ix; 420 I32 cxix = cxstack_ix;
421 PERL_CONTEXT *ccstk = cxstack;
307 PERL_SI *top_si = PL_curstackinfo; 422 PERL_SI *top_si = PL_curstackinfo;
308 PERL_CONTEXT *ccstk = cxstack;
309 423
310 /* 424 /*
311 * the worst thing you can imagine happens first - we have to save 425 * the worst thing you can imagine happens first - we have to save
312 * (and reinitialize) all cv's in the whole callchain :( 426 * (and reinitialize) all cv's in the whole callchain :(
313 */ 427 */
314 428
315 PUSHs (Nullsv); 429 XPUSHs (Nullsv);
316 /* this loop was inspired by pp_caller */ 430 /* this loop was inspired by pp_caller */
317 for (;;) 431 for (;;)
318 { 432 {
319 do 433 while (cxix >= 0)
320 { 434 {
321 PERL_CONTEXT *cx = &ccstk[cxix--]; 435 PERL_CONTEXT *cx = &ccstk[cxix--];
322 436
323 if (CxTYPE(cx) == CXt_SUB) 437 if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
324 { 438 {
325 CV *cv = cx->blk_sub.cv; 439 CV *cv = cx->blk_sub.cv;
440
326 if (CvDEPTH(cv)) 441 if (CvDEPTH (cv))
327 { 442 {
328#ifdef USE_THREADS
329 /*XPUSHs ((SV *)CvOWNER(cv));*/
330 /*CvOWNER(cv) = 0;*/
331 /*error must unlock this cv etc.. etc...*/
332#endif
333 EXTEND (SP, CvDEPTH(cv)*2); 443 EXTEND (SP, 3);
334
335 while (--CvDEPTH(cv))
336 {
337 /* this tells the restore code to increment CvDEPTH */
338 PUSHs (Nullsv);
339 PUSHs ((SV *)cv);
340 }
341
342 PUSHs ((SV *)CvPADLIST(cv)); 444 PUSHs ((SV *)CvPADLIST (cv));
445 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
343 PUSHs ((SV *)cv); 446 PUSHs ((SV *)cv);
344 447
345 get_padlist (cv); /* this is a monster */ 448 CvDEPTH (cv) = 0;
449 get_padlist (aTHX_ cv);
346 } 450 }
347 } 451 }
348 else if (CxTYPE(cx) == CXt_FORMAT)
349 {
350 /* I never used formats, so how should I know how these are implemented? */
351 /* my bold guess is as a simple, plain sub... */
352 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
353 }
354 } 452 }
355 while (cxix >= 0);
356 453
357 if (top_si->si_type == PERLSI_MAIN) 454 if (top_si->si_type == PERLSI_MAIN)
358 break; 455 break;
359 456
360 top_si = top_si->si_prev; 457 top_si = top_si->si_prev;
361 ccstk = top_si->si_cxstack; 458 ccstk = top_si->si_cxstack;
362 cxix = top_si->si_cxix; 459 cxix = top_si->si_cxix;
363 } 460 }
364 461
365 PUTBACK; 462 PUTBACK;
366 } 463 }
367 464
368 c->defav = flags & SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 465 c->defav = GvAV (PL_defgv);
369 c->defsv = flags & SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 466 c->defsv = DEFSV;
370 c->errsv = flags & SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 467 c->errsv = ERRSV;
468 c->deffh = PL_defoutgv;
469 c->irssv = PL_rs;
470 c->irssv_sv = GvSV (irsgv);
371 471
372 c->dowarn = PL_dowarn; 472#define VAR(name,type)c->name = PL_ ## name;
473# include "state.h"
474#undef VAR
475}
373 476
374 c->curstackinfo = PL_curstackinfo; 477/*
375 c->curstack = PL_curstack; 478 * allocate various perl stacks. This is an exact copy
376 c->mainstack = PL_mainstack; 479 * of perl.c:init_stacks, except that it uses less memory
377 c->stack_sp = PL_stack_sp; 480 * on the (sometimes correct) assumption that coroutines do
378 c->op = PL_op; 481 * not usually need a lot of stackspace.
379 c->curpad = PL_curpad; 482 */
483#if CORO_PREFER_PERL_FUNCTIONS
484# define coro_init_stacks init_stacks
485#else
486static void
487coro_init_stacks (pTHX)
488{
489 PL_curstackinfo = new_stackinfo(64, 6);
490 PL_curstackinfo->si_type = PERLSI_MAIN;
491 PL_curstack = PL_curstackinfo->si_stack;
492 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
493
494 PL_stack_base = AvARRAY(PL_curstack);
380 c->stack_base = PL_stack_base; 495 PL_stack_sp = PL_stack_base;
381 c->stack_max = PL_stack_max; 496 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
382 c->tmps_stack = PL_tmps_stack; 497
383 c->tmps_floor = PL_tmps_floor; 498 New(50,PL_tmps_stack,64,SV*);
384 c->tmps_ix = PL_tmps_ix; 499 PL_tmps_floor = -1;
385 c->tmps_max = PL_tmps_max; 500 PL_tmps_ix = -1;
501 PL_tmps_max = 64;
502
503 New(54,PL_markstack,16,I32);
386 c->markstack = PL_markstack; 504 PL_markstack_ptr = PL_markstack;
387 c->markstack_ptr = PL_markstack_ptr; 505 PL_markstack_max = PL_markstack + 16;
388 c->markstack_max = PL_markstack_max; 506
389 c->scopestack = PL_scopestack; 507#ifdef SET_MARK_OFFSET
390 c->scopestack_ix = PL_scopestack_ix; 508 SET_MARK_OFFSET;
391 c->scopestack_max = PL_scopestack_max; 509#endif
392 c->savestack = PL_savestack; 510
393 c->savestack_ix = PL_savestack_ix; 511 New(54,PL_scopestack,16,I32);
394 c->savestack_max = PL_savestack_max; 512 PL_scopestack_ix = 0;
395 c->retstack = PL_retstack; 513 PL_scopestack_max = 16;
396 c->retstack_ix = PL_retstack_ix; 514
397 c->retstack_max = PL_retstack_max; 515 New(54,PL_savestack,64,ANY);
398 c->curcop = PL_curcop; 516 PL_savestack_ix = 0;
517 PL_savestack_max = 64;
518
519#if !PERL_VERSION_ATLEAST (5,9,0)
520 New(54,PL_retstack,4,OP*);
521 PL_retstack_ix = 0;
522 PL_retstack_max = 4;
523#endif
399} 524}
525#endif
400 526
401/* 527/*
402 * destroy the stacks, the callchain etc... 528 * destroy the stacks, the callchain etc...
403 * still there is a memleak of 128 bytes...
404 */ 529 */
405STATIC void 530static void
406destroy_stacks(pTHX) 531coro_destroy_stacks (pTHX)
407{ 532{
408 /* is this ugly, I ask? */
409 while (PL_scopestack_ix)
410 LEAVE;
411
412 /* sure it is, but more important: is it correct?? :/ */
413 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
414 FREETMPS;
415
416 while (PL_curstackinfo->si_next) 533 while (PL_curstackinfo->si_next)
417 PL_curstackinfo = PL_curstackinfo->si_next; 534 PL_curstackinfo = PL_curstackinfo->si_next;
418 535
419 while (PL_curstackinfo) 536 while (PL_curstackinfo)
420 { 537 {
421 PERL_SI *p = PL_curstackinfo->si_prev; 538 PERL_SI *p = PL_curstackinfo->si_prev;
422 539
423 { 540 if (!IN_DESTRUCT)
424 dSP;
425 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
426 PUTBACK; /* possibly superfluous */
427 }
428
429 dounwind(-1);
430
431 SvREFCNT_dec(PL_curstackinfo->si_stack); 541 SvREFCNT_dec (PL_curstackinfo->si_stack);
542
432 Safefree(PL_curstackinfo->si_cxstack); 543 Safefree (PL_curstackinfo->si_cxstack);
433 Safefree(PL_curstackinfo); 544 Safefree (PL_curstackinfo);
434 PL_curstackinfo = p; 545 PL_curstackinfo = p;
435 } 546 }
436 547
437 Safefree(PL_tmps_stack); 548 Safefree (PL_tmps_stack);
438 Safefree(PL_markstack); 549 Safefree (PL_markstack);
439 Safefree(PL_scopestack); 550 Safefree (PL_scopestack);
440 Safefree(PL_savestack); 551 Safefree (PL_savestack);
552#if !PERL_VERSION_ATLEAST (5,9,0)
441 Safefree(PL_retstack); 553 Safefree (PL_retstack);
554#endif
442} 555}
443 556
444STATIC void 557static size_t
445transfer(pTHX_ struct coro *prev, struct coro *next, int flags) 558coro_rss (pTHX_ struct coro *coro)
559{
560 size_t rss = sizeof (coro);
561
562 if (coro->mainstack)
563 {
564 if (coro->flags & CF_RUNNING)
565 {
566 #define VAR(name,type)coro->name = PL_ ## name;
567 # include "state.h"
568 #undef VAR
569 }
570
571 rss += sizeof (coro->curstackinfo);
572 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
573 rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
574 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
575 rss += coro->tmps_max * sizeof (SV *);
576 rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
577 rss += coro->scopestack_max * sizeof (I32);
578 rss += coro->savestack_max * sizeof (ANY);
579
580#if !PERL_VERSION_ATLEAST (5,9,0)
581 rss += coro->retstack_max * sizeof (OP *);
582#endif
583 }
584
585 return rss;
586}
587
588/** coroutine stack handling ************************************************/
589
590static void
591coro_setup (pTHX_ struct coro *coro)
592{
593 /*
594 * emulate part of the perl startup here.
595 */
596 coro_init_stacks (aTHX);
597
598 PL_runops = RUNOPS_DEFAULT;
599 PL_curcop = &PL_compiling;
600 PL_in_eval = EVAL_NULL;
601 PL_comppad = 0;
602 PL_curpm = 0;
603 PL_localizing = 0;
604 PL_dirty = 0;
605 PL_restartop = 0;
606
607 GvSV (PL_defgv) = NEWSV (0, 0);
608 GvAV (PL_defgv) = coro->args; coro->args = 0;
609 GvSV (PL_errgv) = NEWSV (0, 0);
610 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
611 PL_rs = newSVsv (GvSV (irsgv));
612
613 {
614 IO *io = newIO ();
615 PL_defoutgv = newGVgen ("Coro");
616 GvIOp(PL_defoutgv) = io;
617 IoTYPE (io) = IoTYPE_WRONLY;
618 IoOFP (io) = IoIFP (io) = PerlIO_stdout ();
619 IoFLAGS (io) |= IOf_FLUSH;
620 }
621
622 {
623 dSP;
624 LOGOP myop;
625
626 Zero (&myop, 1, LOGOP);
627 myop.op_next = Nullop;
628 myop.op_flags = OPf_WANT_VOID;
629
630 PUSHMARK (SP);
631 XPUSHs (av_shift (GvAV (PL_defgv)));
632 PUTBACK;
633 PL_op = (OP *)&myop;
634 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
635 SPAGAIN;
636 }
637
638 ENTER; /* necessary e.g. for dounwind */
639}
640
641static void
642coro_destroy (pTHX_ struct coro *coro)
643{
644 if (!IN_DESTRUCT)
645 {
646 /* restore all saved variables and stuff */
647 LEAVE_SCOPE (0);
648 assert (PL_tmps_floor == -1);
649
650 /* free all temporaries */
651 FREETMPS;
652 assert (PL_tmps_ix == -1);
653
654 /* unwind all extra stacks */
655 POPSTACK_TO (PL_mainstack);
656
657 /* unwind main stack */
658 dounwind (-1);
659 }
660
661 SvREFCNT_dec (GvSV (PL_defgv));
662 SvREFCNT_dec (GvAV (PL_defgv));
663 SvREFCNT_dec (GvSV (PL_errgv));
664 SvREFCNT_dec (PL_defoutgv);
665 SvREFCNT_dec (PL_rs);
666 SvREFCNT_dec (GvSV (irsgv));
667
668 SvREFCNT_dec (coro->asp_deffh);
669 //SvREFCNT_dec (coro->throw);
670
671 coro_destroy_stacks (aTHX);
672}
673
674static void
675free_coro_mortal (pTHX)
676{
677 if (coro_mortal)
678 {
679 SvREFCNT_dec (coro_mortal);
680 coro_mortal = 0;
681 }
682}
683
684static int
685runops_trace (pTHX)
686{
687 COP *oldcop = 0;
688 int oldcxix = -2;
689 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
690 coro_cctx *cctx = coro->cctx;
691
692 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
693 {
694 PERL_ASYNC_CHECK ();
695
696 if (cctx->flags & CC_TRACE_ALL)
697 {
698 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
699 {
700 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
701 SV **bot, **top;
702 AV *av = newAV (); /* return values */
703 SV **cb;
704 dSP;
705
706 GV *gv = CvGV (cx->blk_sub.cv);
707 SV *fullname = sv_2mortal (newSV (0));
708 if (isGV (gv))
709 gv_efullname3 (fullname, gv, 0);
710
711 bot = PL_stack_base + cx->blk_oldsp + 1;
712 top = cx->blk_gimme == G_ARRAY ? SP + 1
713 : cx->blk_gimme == G_SCALAR ? bot + 1
714 : bot;
715
716 while (bot < top)
717 av_push (av, SvREFCNT_inc (*bot++));
718
719 PL_runops = RUNOPS_DEFAULT;
720 ENTER;
721 SAVETMPS;
722 EXTEND (SP, 3);
723 PUSHMARK (SP);
724 PUSHs (&PL_sv_no);
725 PUSHs (fullname);
726 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
727 PUTBACK;
728 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
729 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
730 SPAGAIN;
731 FREETMPS;
732 LEAVE;
733 PL_runops = runops_trace;
734 }
735
736 if (oldcop != PL_curcop)
737 {
738 oldcop = PL_curcop;
739
740 if (PL_curcop != &PL_compiling)
741 {
742 SV **cb;
743
744 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
745 {
746 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
747
748 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
749 {
750 runops_proc_t old_runops = PL_runops;
751 dSP;
752 GV *gv = CvGV (cx->blk_sub.cv);
753 SV *fullname = sv_2mortal (newSV (0));
754
755 if (isGV (gv))
756 gv_efullname3 (fullname, gv, 0);
757
758 PL_runops = RUNOPS_DEFAULT;
759 ENTER;
760 SAVETMPS;
761 EXTEND (SP, 3);
762 PUSHMARK (SP);
763 PUSHs (&PL_sv_yes);
764 PUSHs (fullname);
765 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
766 PUTBACK;
767 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
768 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
769 SPAGAIN;
770 FREETMPS;
771 LEAVE;
772 PL_runops = runops_trace;
773 }
774
775 oldcxix = cxstack_ix;
776 }
777
778 if (cctx->flags & CC_TRACE_LINE)
779 {
780 dSP;
781
782 PL_runops = RUNOPS_DEFAULT;
783 ENTER;
784 SAVETMPS;
785 EXTEND (SP, 3);
786 PL_runops = RUNOPS_DEFAULT;
787 PUSHMARK (SP);
788 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
789 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
790 PUTBACK;
791 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
792 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
793 SPAGAIN;
794 FREETMPS;
795 LEAVE;
796 PL_runops = runops_trace;
797 }
798 }
799 }
800 }
801 }
802
803 TAINT_NOT;
804 return 0;
805}
806
807/* inject a fake call to Coro::State::_cctx_init into the execution */
808/* _cctx_init should be careful, as it could be called at almost any time */
809/* during execution of a perl program */
810static void NOINLINE
811prepare_cctx (pTHX_ coro_cctx *cctx)
446{ 812{
447 dSP; 813 dSP;
814 LOGOP myop;
448 815
816 PL_top_env = &PL_start_env;
817
818 if (cctx->flags & CC_TRACE)
819 PL_runops = runops_trace;
820
821 Zero (&myop, 1, LOGOP);
822 myop.op_next = PL_op;
823 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
824
825 PUSHMARK (SP);
826 EXTEND (SP, 2);
827 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
828 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
829 PUTBACK;
830 PL_op = (OP *)&myop;
831 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
832 SPAGAIN;
833}
834
835/*
836 * this is a _very_ stripped down perl interpreter ;)
837 */
838static void
839coro_run (void *arg)
840{
841 dTHX;
842
843 /* coro_run is the alternative tail of transfer(), so unlock here. */
844 UNLOCK;
845
846 /* we now skip the entersub that lead to transfer() */
847 PL_op = PL_op->op_next;
848
849 /* inject a fake subroutine call to cctx_init */
850 prepare_cctx (aTHX_ (coro_cctx *)arg);
851
852 /* somebody or something will hit me for both perl_run and PL_restartop */
853 PL_restartop = PL_op;
854 perl_run (PL_curinterp);
855
856 /*
857 * If perl-run returns we assume exit() was being called or the coro
858 * fell off the end, which seems to be the only valid (non-bug)
859 * reason for perl_run to return. We try to exit by jumping to the
860 * bootstrap-time "top" top_env, as we cannot restore the "main"
861 * coroutine as Coro has no such concept
862 */
863 PL_top_env = main_top_env;
864 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
865}
866
867static coro_cctx *
868cctx_new ()
869{
870 coro_cctx *cctx;
871 void *stack_start;
872 size_t stack_size;
873
874 ++cctx_count;
875
876 Newz (0, cctx, 1, coro_cctx);
877
878#if HAVE_MMAP
879
880 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
881 /* mmap supposedly does allocate-on-write for us */
882 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
883
884 if (cctx->sptr != (void *)-1)
885 {
886# if CORO_STACKGUARD
887 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
888# endif
889 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
890 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
891 cctx->flags |= CC_MAPPED;
892 }
893 else
894#endif
895 {
896 cctx->ssize = coro_stacksize * (long)sizeof (long);
897 New (0, cctx->sptr, coro_stacksize, long);
898
899 if (!cctx->sptr)
900 {
901 perror ("FATAL: unable to allocate stack for coroutine");
902 _exit (EXIT_FAILURE);
903 }
904
905 stack_start = cctx->sptr;
906 stack_size = cctx->ssize;
907 }
908
909 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
910 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
911
912 return cctx;
913}
914
915static void
916cctx_destroy (coro_cctx *cctx)
917{
918 if (!cctx)
919 return;
920
921 --cctx_count;
922
923#if CORO_USE_VALGRIND
924 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
925#endif
926
927#if HAVE_MMAP
928 if (cctx->flags & CC_MAPPED)
929 munmap (cctx->sptr, cctx->ssize);
930 else
931#endif
932 Safefree (cctx->sptr);
933
934 Safefree (cctx);
935}
936
937static coro_cctx *
938cctx_get (pTHX)
939{
940 while (cctx_first)
941 {
942 coro_cctx *cctx = cctx_first;
943 cctx_first = cctx->next;
944 --cctx_idle;
945
946 if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
947 return cctx;
948
949 cctx_destroy (cctx);
950 }
951
952 return cctx_new ();
953}
954
955static void
956cctx_put (coro_cctx *cctx)
957{
958 /* free another cctx if overlimit */
959 if (cctx_idle >= MAX_IDLE_CCTX)
960 {
961 coro_cctx *first = cctx_first;
962 cctx_first = first->next;
963 --cctx_idle;
964
965 cctx_destroy (first);
966 }
967
968 ++cctx_idle;
969 cctx->next = cctx_first;
970 cctx_first = cctx;
971}
972
973/** coroutine switching *****************************************************/
974
975static void NOINLINE
976transfer_check (pTHX_ struct coro *prev, struct coro *next)
977{
449 if (prev != next) 978 if (prev != next)
450 { 979 {
451 /* 980 if (!(prev->flags & (CF_RUNNING | CF_NEW)))
452 * this could be done in newprocess which would lead to 981 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
453 * extremely elegant and fast (just SAVE/LOAD) 982
454 * code here, but lazy allocation of stacks has also 983 if (next->flags & CF_RUNNING)
455 * some virtues and the overhead of the if() is nil. 984 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
456 */ 985
457 if (next->mainstack) 986 if (next->flags & CF_DESTROYED)
987 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
988
989 if (PL_lex_state != LEX_NOTPARSING)
990 croak ("Coro::State::transfer called while parsing, but this is not supported");
991 }
992}
993
994/* always use the TRANSFER macro */
995static void NOINLINE
996transfer (pTHX_ struct coro *prev, struct coro *next)
997{
998 dSTACKLEVEL;
999
1000 /* sometimes transfer is only called to set idle_sp */
1001 if (!next)
1002 {
1003 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1004 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1005 }
1006 else if (prev != next)
1007 {
1008 coro_cctx *prev__cctx;
1009
1010 if (prev->flags & CF_NEW)
458 { 1011 {
459 SAVE (prev, flags); 1012 /* create a new empty context */
460 LOAD (next); 1013 Newz (0, prev->cctx, 1, coro_cctx);
461 /* mark this state as in-use */ 1014 prev->flags &= ~CF_NEW;
462 next->mainstack = 0; 1015 prev->flags |= CF_RUNNING;
463 next->tmps_ix = -2;
464 } 1016 }
465 else if (next->tmps_ix == -2) 1017
1018 prev->flags &= ~CF_RUNNING;
1019 next->flags |= CF_RUNNING;
1020
1021 LOCK;
1022
1023 if (next->flags & CF_NEW)
466 { 1024 {
467 croak ("tried to transfer to running coroutine"); 1025 /* need to start coroutine */
1026 next->flags &= ~CF_NEW;
1027 /* first get rid of the old state */
1028 save_perl (aTHX_ prev);
1029 /* setup coroutine call */
1030 coro_setup (aTHX_ next);
468 } 1031 }
469 else 1032 else
470 { 1033 {
1034 /* coroutine already started */
1035 save_perl (aTHX_ prev);
1036 load_perl (aTHX_ next);
471 /* 1037 }
472 * emulate part of the perl startup here.
473 */
474 UNOP myop;
475 1038
476 SAVE (prev, -1); /* first get rid of the old state */ 1039 prev__cctx = prev->cctx;
477 1040
478 init_stacks (); /* from perl.c */ 1041 /* possibly "free" the cctx */
1042 if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
1043 {
1044 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1045 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
1046
1047 prev->cctx = 0;
1048
1049 cctx_put (prev__cctx);
1050 }
1051
1052 ++next->usecount;
1053
1054 if (!next->cctx)
1055 next->cctx = cctx_get (aTHX);
1056
1057 if (prev__cctx != next->cctx)
1058 {
1059 prev__cctx->top_env = PL_top_env;
1060 PL_top_env = next->cctx->top_env;
1061 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1062 }
1063
1064 free_coro_mortal (aTHX);
1065 UNLOCK;
1066 }
1067}
1068
1069struct transfer_args
1070{
1071 struct coro *prev, *next;
1072};
1073
1074#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
1075#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1076
1077/** high level stuff ********************************************************/
1078
1079static int
1080coro_state_destroy (pTHX_ struct coro *coro)
1081{
1082 if (coro->flags & CF_DESTROYED)
1083 return 0;
1084
1085 coro->flags |= CF_DESTROYED;
1086
1087 if (coro->flags & CF_READY)
1088 {
1089 /* reduce nready, as destroying a ready coro effectively unreadies it */
1090 /* alternative: look through all ready queues and remove the coro */
1091 LOCK;
1092 --coro_nready;
1093 UNLOCK;
1094 }
1095 else
1096 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1097
1098 if (coro->mainstack && coro->mainstack != main_mainstack)
1099 {
1100 struct coro temp;
1101
1102 if (coro->flags & CF_RUNNING)
1103 croak ("FATAL: tried to destroy currently running coroutine");
1104
1105 save_perl (aTHX_ &temp);
1106 load_perl (aTHX_ coro);
1107
1108 coro_destroy (aTHX_ coro);
1109
1110 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
1111
1112 coro->mainstack = 0;
1113 }
1114
1115 cctx_destroy (coro->cctx);
1116 SvREFCNT_dec (coro->args);
1117
1118 if (coro->next) coro->next->prev = coro->prev;
1119 if (coro->prev) coro->prev->next = coro->next;
1120 if (coro == coro_first) coro_first = coro->next;
1121
1122 return 1;
1123}
1124
1125static int
1126coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1127{
1128 struct coro *coro = (struct coro *)mg->mg_ptr;
1129 mg->mg_ptr = 0;
1130
1131 coro->hv = 0;
1132
1133 if (--coro->refcnt < 0)
1134 {
1135 coro_state_destroy (aTHX_ coro);
1136 Safefree (coro);
1137 }
1138
1139 return 0;
1140}
1141
1142static int
1143coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1144{
1145 struct coro *coro = (struct coro *)mg->mg_ptr;
1146
1147 ++coro->refcnt;
1148
1149 return 0;
1150}
1151
1152static MGVTBL coro_state_vtbl = {
1153 0, 0, 0, 0,
1154 coro_state_free,
1155 0,
1156#ifdef MGf_DUP
1157 coro_state_dup,
1158#else
1159# define MGf_DUP 0
1160#endif
1161};
1162
1163static void
1164prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1165{
1166 ta->prev = SvSTATE (prev_sv);
1167 ta->next = SvSTATE (next_sv);
1168 TRANSFER_CHECK (*ta);
1169}
1170
1171static void
1172api_transfer (SV *prev_sv, SV *next_sv)
1173{
1174 dTHX;
1175 struct transfer_args ta;
1176
1177 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1178 TRANSFER (ta);
1179}
1180
1181/** Coro ********************************************************************/
1182
1183static void
1184coro_enq (pTHX_ SV *coro_sv)
1185{
1186 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1187}
1188
1189static SV *
1190coro_deq (pTHX_ int min_prio)
1191{
1192 int prio = PRIO_MAX - PRIO_MIN;
1193
1194 min_prio -= PRIO_MIN;
1195 if (min_prio < 0)
1196 min_prio = 0;
1197
1198 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
1199 if (AvFILLp (coro_ready [prio]) >= 0)
1200 return av_shift (coro_ready [prio]);
1201
1202 return 0;
1203}
1204
1205static int
1206api_ready (SV *coro_sv)
1207{
1208 dTHX;
1209 struct coro *coro;
1210
1211 if (SvROK (coro_sv))
1212 coro_sv = SvRV (coro_sv);
1213
1214 coro = SvSTATE (coro_sv);
1215
1216 if (coro->flags & CF_READY)
1217 return 0;
1218
1219 coro->flags |= CF_READY;
1220
1221 LOCK;
1222 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1223 ++coro_nready;
1224 UNLOCK;
1225
1226 return 1;
1227}
1228
1229static int
1230api_is_ready (SV *coro_sv)
1231{
1232 dTHX;
1233 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1234}
1235
1236static void
1237prepare_schedule (pTHX_ struct transfer_args *ta)
1238{
1239 SV *prev_sv, *next_sv;
1240
1241 for (;;)
1242 {
1243 LOCK;
1244 next_sv = coro_deq (aTHX_ PRIO_MIN);
1245
1246 /* nothing to schedule: call the idle handler */
1247 if (!next_sv)
1248 {
479 SPAGAIN; 1249 dSP;
1250 UNLOCK;
480 1251
481 PL_op = (OP *)&myop; 1252 ENTER;
482 /*PL_curcop = 0;*/ 1253 SAVETMPS;
483 SvREFCNT_dec (GvAV (PL_defgv));
484 GvAV (PL_defgv) = next->args;
485 1254
486 Zero(&myop, 1, UNOP);
487 myop.op_next = Nullop;
488 myop.op_flags = OPf_WANT_VOID;
489
490 PUSHMARK(SP); 1255 PUSHMARK (SP);
491 XPUSHs ((SV*)get_cv(SUB_INIT, TRUE));
492 /*
493 * the next line is slightly wrong, as PL_op->op_next
494 * is actually being executed so we skip the first op.
495 * that doesn't matter, though, since it is only
496 * pp_nextstate and we never return...
497 * ah yes, and I don't care anyways ;)
498 */
499 PUTBACK; 1256 PUTBACK;
500 PL_op = pp_entersub(aTHX); 1257 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
501 SPAGAIN;
502 1258
503 ENTER; /* necessary e.g. for dounwind */ 1259 FREETMPS;
1260 LEAVE;
1261 continue;
504 } 1262 }
1263
1264 ta->next = SvSTATE (next_sv);
1265
1266 /* cannot transfer to destroyed coros, skip and look for next */
1267 if (ta->next->flags & CF_DESTROYED)
1268 {
1269 UNLOCK;
1270 SvREFCNT_dec (next_sv);
1271 /* coro_nready is already taken care of by destroy */
1272 continue;
1273 }
1274
1275 --coro_nready;
1276 UNLOCK;
1277 break;
1278 }
1279
1280 /* free this only after the transfer */
1281 prev_sv = SvRV (coro_current);
1282 ta->prev = SvSTATE (prev_sv);
1283 TRANSFER_CHECK (*ta);
1284 assert (ta->next->flags & CF_READY);
1285 ta->next->flags &= ~CF_READY;
1286 SvRV_set (coro_current, next_sv);
1287
1288 LOCK;
1289 free_coro_mortal (aTHX);
1290 coro_mortal = prev_sv;
1291 UNLOCK;
1292}
1293
1294static void
1295prepare_cede (pTHX_ struct transfer_args *ta)
1296{
1297 api_ready (coro_current);
1298 prepare_schedule (aTHX_ ta);
1299}
1300
1301static int
1302prepare_cede_notself (pTHX_ struct transfer_args *ta)
1303{
1304 if (coro_nready)
505 } 1305 {
1306 SV *prev = SvRV (coro_current);
1307 prepare_schedule (aTHX_ ta);
1308 api_ready (prev);
1309 return 1;
1310 }
1311 else
1312 return 0;
506} 1313}
507 1314
1315static void
1316api_schedule (void)
1317{
1318 dTHX;
1319 struct transfer_args ta;
1320
1321 prepare_schedule (aTHX_ &ta);
1322 TRANSFER (ta);
1323}
1324
1325static int
1326api_cede (void)
1327{
1328 dTHX;
1329 struct transfer_args ta;
1330
1331 prepare_cede (aTHX_ &ta);
1332
1333 if (ta.prev != ta.next)
1334 {
1335 TRANSFER (ta);
1336 return 1;
1337 }
1338 else
1339 return 0;
1340}
1341
1342static int
1343api_cede_notself (void)
1344{
1345 dTHX;
1346 struct transfer_args ta;
1347
1348 if (prepare_cede_notself (aTHX_ &ta))
1349 {
1350 TRANSFER (ta);
1351 return 1;
1352 }
1353 else
1354 return 0;
1355}
1356
1357static void
1358api_trace (SV *coro_sv, int flags)
1359{
1360 dTHX;
1361 struct coro *coro = SvSTATE (coro_sv);
1362
1363 if (flags & CC_TRACE)
1364 {
1365 if (!coro->cctx)
1366 coro->cctx = cctx_new ();
1367 else if (!(coro->cctx->flags & CC_TRACE))
1368 croak ("cannot enable tracing on coroutine with custom stack");
1369
1370 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1371 }
1372 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1373 {
1374 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1375
1376 if (coro->flags & CF_RUNNING)
1377 PL_runops = RUNOPS_DEFAULT;
1378 else
1379 coro->runops = RUNOPS_DEFAULT;
1380 }
1381}
1382
508MODULE = Coro::State PACKAGE = Coro::State 1383MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
509 1384
510PROTOTYPES: ENABLE 1385PROTOTYPES: DISABLE
511 1386
512BOOT: 1387BOOT:
1388{
1389#ifdef USE_ITHREADS
1390 MUTEX_INIT (&coro_mutex);
1391#endif
1392 BOOT_PAGESIZE;
1393
1394 irsgv = gv_fetchpv ("/", 1, SVt_PV);
1395
513 HV * stash = gv_stashpvn("Coro::State", 10, TRUE); 1396 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
514 1397
515 newCONSTSUB (stash, "SAVE_DEFAV", newSViv (SAVE_DEFAV)); 1398 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
516 newCONSTSUB (stash, "SAVE_DEFSV", newSViv (SAVE_DEFSV)); 1399 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
517 newCONSTSUB (stash, "SAVE_ERRSV", newSViv (SAVE_ERRSV)); 1400 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1401 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
518 1402
519 if (!padlist_cache) 1403 main_mainstack = PL_mainstack;
520 padlist_cache = newHV (); 1404 main_top_env = PL_top_env;
521 1405
522Coro::State 1406 while (main_top_env->je_prev)
523_newprocess(args) 1407 main_top_env = main_top_env->je_prev;
524 SV * args 1408
525 PROTOTYPE: $ 1409 coroapi.ver = CORO_API_VERSION;
1410 coroapi.transfer = api_transfer;
1411
1412 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1413}
1414
1415SV *
1416new (char *klass, ...)
526 CODE: 1417 CODE:
527 Coro__State coro; 1418{
1419 struct coro *coro;
1420 HV *hv;
1421 int i;
528 1422
529 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
530 croak ("Coro::State::_newprocess expects an arrayref");
531
532 New (0, coro, 1, struct coro); 1423 Newz (0, coro, 1, struct coro);
1424 coro->args = newAV ();
1425 coro->flags = CF_NEW;
533 1426
534 coro->mainstack = 0; /* actual work is done inside transfer */ 1427 if (coro_first) coro_first->prev = coro;
535 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1428 coro->next = coro_first;
1429 coro_first = coro;
536 1430
537 RETVAL = coro; 1431 coro->hv = hv = newHV ();
1432 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1433 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1434
1435 for (i = 1; i < items; i++)
1436 av_push (coro->args, newSVsv (ST (i)));
1437}
538 OUTPUT: 1438 OUTPUT:
539 RETVAL 1439 RETVAL
540 1440
1441# these not obviously related functions are all rolled into the same xs
1442# function to increase chances that they all will call transfer with the same
1443# stack offset
541void 1444void
542transfer(prev, next, flags = SAVE_DEFAV) 1445_set_stacklevel (...)
543 Coro::State_or_hashref prev 1446 ALIAS:
544 Coro::State_or_hashref next 1447 Coro::State::transfer = 1
545 int flags 1448 Coro::schedule = 2
546 PROTOTYPE: @ 1449 Coro::cede = 3
1450 Coro::cede_notself = 4
547 CODE: 1451 CODE:
1452{
1453 struct transfer_args ta;
548 1454
549 transfer (aTHX_ prev, next, flags); 1455 switch (ix)
1456 {
1457 case 0:
1458 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1459 ta.next = 0;
1460 break;
1461
1462 case 1:
1463 if (items != 2)
1464 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1465
1466 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1467 break;
1468
1469 case 2:
1470 prepare_schedule (aTHX_ &ta);
1471 break;
1472
1473 case 3:
1474 prepare_cede (aTHX_ &ta);
1475 break;
1476
1477 case 4:
1478 if (!prepare_cede_notself (aTHX_ &ta))
1479 XSRETURN_EMPTY;
1480
1481 break;
1482 }
1483
1484 BARRIER;
1485 TRANSFER (ta);
1486
1487 if (GIMME_V != G_VOID && ta.next != ta.prev)
1488 XSRETURN_YES;
1489}
1490
1491bool
1492_destroy (SV *coro_sv)
1493 CODE:
1494 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1495 OUTPUT:
1496 RETVAL
550 1497
551void 1498void
552DESTROY(coro) 1499_exit (code)
553 Coro::State coro 1500 int code
554 CODE: 1501 PROTOTYPE: $
1502 CODE:
1503 _exit (code);
555 1504
1505int
1506cctx_stacksize (int new_stacksize = 0)
1507 CODE:
1508 RETVAL = coro_stacksize;
1509 if (new_stacksize)
1510 coro_stacksize = new_stacksize;
1511 OUTPUT:
1512 RETVAL
1513
1514int
1515cctx_count ()
1516 CODE:
1517 RETVAL = cctx_count;
1518 OUTPUT:
1519 RETVAL
1520
1521int
1522cctx_idle ()
1523 CODE:
1524 RETVAL = cctx_idle;
1525 OUTPUT:
1526 RETVAL
1527
1528void
1529list ()
1530 PPCODE:
1531{
1532 struct coro *coro;
1533 for (coro = coro_first; coro; coro = coro->next)
1534 if (coro->hv)
1535 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1536}
1537
1538void
1539call (Coro::State coro, SV *coderef)
1540 ALIAS:
1541 eval = 1
1542 CODE:
1543{
556 if (coro->mainstack) 1544 if (coro->mainstack)
557 { 1545 {
558 struct coro temp; 1546 struct coro temp;
1547 Zero (&temp, 1, struct coro);
559 1548
560 SAVE(aTHX_ (&temp), SAVE_ALL); 1549 if (!(coro->flags & CF_RUNNING))
561 LOAD(aTHX_ coro); 1550 {
1551 save_perl (aTHX_ &temp);
1552 load_perl (aTHX_ coro);
1553 }
562 1554
563 destroy_stacks (); 1555 {
1556 dSP;
1557 ENTER;
1558 SAVETMPS;
1559 PUSHMARK (SP);
1560 PUTBACK;
1561 if (ix)
1562 eval_sv (coderef, 0);
1563 else
1564 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1565 SPAGAIN;
1566 FREETMPS;
1567 LEAVE;
1568 PUTBACK;
1569 }
564 1570
565 LOAD((&temp)); /* this will get rid of defsv etc.. */ 1571 if (!(coro->flags & CF_RUNNING))
1572 {
1573 save_perl (aTHX_ coro);
1574 load_perl (aTHX_ &temp);
1575 }
566 } 1576 }
1577}
567 1578
568 Safefree (coro); 1579SV *
1580is_ready (Coro::State coro)
1581 PROTOTYPE: $
1582 ALIAS:
1583 is_ready = CF_READY
1584 is_running = CF_RUNNING
1585 is_new = CF_NEW
1586 is_destroyed = CF_DESTROYED
1587 CODE:
1588 RETVAL = boolSV (coro->flags & ix);
1589 OUTPUT:
1590 RETVAL
569 1591
570void 1592void
571flush() 1593api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1594
1595SV *
1596has_stack (Coro::State coro)
1597 PROTOTYPE: $
572 CODE: 1598 CODE:
573#ifdef MAY_FLUSH 1599 RETVAL = boolSV (!!coro->cctx);
574 flush_padlist_cache (); 1600 OUTPUT:
575#endif 1601 RETVAL
576 1602
1603int
1604is_traced (Coro::State coro)
1605 PROTOTYPE: $
1606 CODE:
1607 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1608 OUTPUT:
1609 RETVAL
1610
1611IV
1612rss (Coro::State coro)
1613 PROTOTYPE: $
1614 ALIAS:
1615 usecount = 1
1616 CODE:
1617 switch (ix)
1618 {
1619 case 0: RETVAL = coro_rss (aTHX_ coro); break;
1620 case 1: RETVAL = coro->usecount; break;
1621 }
1622 OUTPUT:
1623 RETVAL
1624
1625
577MODULE = Coro::State PACKAGE = Coro::Cont 1626MODULE = Coro::State PACKAGE = Coro
578 1627
579# this is dirty and should be in it's own .xs 1628BOOT:
1629{
1630 int i;
1631
1632 sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
1633 sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
1634 av_async_pool = get_av ("Coro::async_pool", TRUE);
1635
1636 coro_current = get_sv ("Coro::current", FALSE);
1637 SvREADONLY_on (coro_current);
1638
1639 coro_stash = gv_stashpv ("Coro", TRUE);
1640
1641 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1642 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1643 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1644 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1645 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1646 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1647
1648 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1649 coro_ready[i] = newAV ();
1650
1651 {
1652 SV *sv = perl_get_sv("Coro::API", 1);
1653
1654 coroapi.schedule = api_schedule;
1655 coroapi.cede = api_cede;
1656 coroapi.cede_notself = api_cede_notself;
1657 coroapi.ready = api_ready;
1658 coroapi.is_ready = api_is_ready;
1659 coroapi.nready = &coro_nready;
1660 coroapi.current = coro_current;
1661
1662 GCoroAPI = &coroapi;
1663 sv_setiv (sv, (IV)&coroapi);
1664 SvREADONLY_on (sv);
1665 }
1666}
580 1667
581void 1668void
582result(...) 1669_set_current (SV *current)
583 PROTOTYPE: @ 1670 PROTOTYPE: $
1671 CODE:
1672 SvREFCNT_dec (SvRV (coro_current));
1673 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1674
1675int
1676prio (Coro::State coro, int newprio = 0)
1677 ALIAS:
1678 nice = 1
584 CODE: 1679 CODE:
585 static SV *returnstk; 1680{
586 SV *sv; 1681 RETVAL = coro->prio;
1682
1683 if (items > 1)
1684 {
1685 if (ix)
1686 newprio = coro->prio - newprio;
1687
1688 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1689 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1690
1691 coro->prio = newprio;
1692 }
1693}
1694 OUTPUT:
1695 RETVAL
1696
1697SV *
1698ready (SV *self)
1699 PROTOTYPE: $
1700 CODE:
1701 RETVAL = boolSV (api_ready (self));
1702 OUTPUT:
1703 RETVAL
1704
1705int
1706nready (...)
1707 PROTOTYPE:
1708 CODE:
1709 RETVAL = coro_nready;
1710 OUTPUT:
1711 RETVAL
1712
1713# for async_pool speedup
1714void
1715_pool_1 (SV *cb)
1716 CODE:
1717{
1718 struct coro *coro = SvSTATE (coro_current);
1719 HV *hv = (HV *)SvRV (coro_current);
587 AV *defav = GvAV (PL_defgv); 1720 AV *defav = GvAV (PL_defgv);
588 struct coro *prev, *next; 1721 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1722 AV *invoke_av;
1723 int i, len;
589 1724
590 if (!returnstk) 1725 if (!invoke)
591 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 1726 croak ("\3terminate\2\n");
592 1727
593 /* set up @_ */ 1728 SvREFCNT_dec (coro->asp_deffh);
594 av_clear (defav); 1729 coro->asp_deffh = SvREFCNT_inc (PL_defoutgv);
1730
1731 hv_store (hv, "desc", sizeof ("desc") - 1,
1732 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1733
1734 invoke_av = (AV *)SvRV (invoke);
1735 len = av_len (invoke_av);
1736
1737 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1738
1739 if (len > 0)
1740 {
595 av_fill (defav, items - 1); 1741 av_fill (defav, len - 1);
596 while (items--) 1742 for (i = 0; i < len; ++i)
597 av_store (defav, items, SvREFCNT_inc (ST(items))); 1743 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
1744 }
598 1745
599 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
600 sv = av_pop ((AV *)SvRV (returnstk));
601 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
602 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
603 SvREFCNT_dec (sv); 1746 SvREFCNT_dec (invoke);
604 transfer(prev, next, 0); 1747}
605 1748
1749void
1750_pool_2 (SV *cb)
1751 CODE:
1752{
1753 struct coro *coro = SvSTATE (coro_current);
1754
1755 sv_setsv (cb, &PL_sv_undef);
1756
1757 SvREFCNT_dec (PL_defoutgv); PL_defoutgv = coro->asp_deffh;
1758 coro->asp_deffh = 0;
1759
1760 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1761 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1762 croak ("\3terminate\2\n");
1763
1764 av_clear (GvAV (PL_defgv));
1765 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1766 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1767
1768 coro->prio = 0;
1769
1770 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
1771 api_trace (coro_current, 0);
1772
1773 av_push (av_async_pool, newSVsv (coro_current));
1774}
1775
1776
1777MODULE = Coro::State PACKAGE = Coro::AIO
1778
1779SV *
1780_get_state ()
1781 CODE:
1782{
1783 struct io_state *data;
1784
1785 RETVAL = newSV (sizeof (struct io_state));
1786 data = (struct io_state *)SvPVX (RETVAL);
1787 SvCUR_set (RETVAL, sizeof (struct io_state));
1788 SvPOK_only (RETVAL);
1789
1790 data->errorno = errno;
1791 data->laststype = PL_laststype;
1792 data->laststatval = PL_laststatval;
1793 data->statcache = PL_statcache;
1794}
1795 OUTPUT:
1796 RETVAL
1797
1798void
1799_set_state (char *data_)
1800 PROTOTYPE: $
1801 CODE:
1802{
1803 struct io_state *data = (void *)data_;
1804
1805 errno = data->errorno;
1806 PL_laststype = data->laststype;
1807 PL_laststatval = data->laststatval;
1808 PL_statcache = data->statcache;
1809}
1810

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