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

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