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Comparing Coro/Coro/State.xs (file contents):
Revision 1.7 by root, Thu Jul 19 02:45:09 2001 UTC vs.
Revision 1.170 by root, Thu Sep 27 20:14:49 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 SAVE_DEFAV 0x00000001 80#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
14#define SAVE_DEFSV 0x00000002 81# undef CORO_STACKGUARD
15#define SAVE_ERRSV 0x00000004 82#endif
16 83
17#define SAVE_ALL -1 84#ifndef CORO_STACKGUARD
85# define CORO_STACKGUARD 0
86#endif
18 87
88/* prefer perl internal functions over our own? */
89#ifndef CORO_PREFER_PERL_FUNCTIONS
90# define CORO_PREFER_PERL_FUNCTIONS 0
91#endif
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
137/* async_pool helper stuff */
138static SV *sv_pool_rss;
139static SV *sv_pool_size;
140static AV *av_async_pool;
141
142static struct coro_cctx *cctx_first;
143static int cctx_count, cctx_idle;
144
145enum {
146 CC_MAPPED = 0x01,
147 CC_NOREUSE = 0x02, /* throw this away after tracing */
148 CC_TRACE = 0x04,
149 CC_TRACE_SUB = 0x08, /* trace sub calls */
150 CC_TRACE_LINE = 0x10, /* trace each statement */
151 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
152};
153
154/* this is a structure representing a c-level coroutine */
155typedef struct coro_cctx {
156 struct coro_cctx *next;
157
158 /* the stack */
159 void *sptr;
160 size_t ssize;
161
162 /* cpu state */
163 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
164 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
165 JMPENV *top_env;
166 coro_context cctx;
167
168#if CORO_USE_VALGRIND
169 int valgrind_id;
170#endif
171 unsigned char flags;
172} coro_cctx;
173
174enum {
175 CF_RUNNING = 0x0001, /* coroutine is running */
176 CF_READY = 0x0002, /* coroutine is ready */
177 CF_NEW = 0x0004, /* has never been switched to */
178 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
179};
180
181/* this is a structure representing a perl-level coroutine */
19struct coro { 182struct coro {
20 /* optionally saved, might be zero */ 183 /* the c coroutine allocated to this perl coroutine, if any */
21 AV *defav; 184 coro_cctx *cctx;
22 SV *defsv;
23 SV *errsv;
24
25 /* saved global state not related to stacks */
26 U8 dowarn;
27
28 /* the stacks and related info (callchain etc..) */
29 PERL_SI *curstackinfo;
30 AV *curstack;
31 AV *mainstack;
32 SV **stack_sp;
33 OP *op;
34 SV **curpad;
35 SV **stack_base;
36 SV **stack_max;
37 SV **tmps_stack;
38 I32 tmps_floor;
39 I32 tmps_ix;
40 I32 tmps_max;
41 I32 *markstack;
42 I32 *markstack_ptr;
43 I32 *markstack_max;
44 I32 *scopestack;
45 I32 scopestack_ix;
46 I32 scopestack_max;
47 ANY *savestack;
48 I32 savestack_ix;
49 I32 savestack_max;
50 OP **retstack;
51 I32 retstack_ix;
52 I32 retstack_max;
53 COP *curcop;
54 185
55 /* data associated with this coroutine (initial args) */ 186 /* data associated with this coroutine (initial args) */
56 AV *args; 187 AV *args;
188 int refcnt;
189 int save; /* CORO_SAVE flags */
190 int flags; /* CF_ flags */
191
192 /* optionally saved, might be zero */
193 AV *defav; /* @_ */
194 SV *defsv; /* $_ */
195 SV *errsv; /* $@ */
196 GV *deffh; /* default filehandle */
197 SV *irssv; /* $/ */
198 SV *irssv_sv; /* real $/ cache */
199
200#define VAR(name,type) type name;
201# include "state.h"
202#undef VAR
203
204 /* coro process data */
205 int prio;
206
207 /* linked list */
208 struct coro *next, *prev;
209 HV *hv; /* the perl hash associated with this coro, if any */
57}; 210};
58 211
59typedef struct coro *Coro__State; 212typedef struct coro *Coro__State;
60typedef struct coro *Coro__State_or_hashref; 213typedef struct coro *Coro__State_or_hashref;
61 214
62static HV *padlist_cache; 215/** Coro ********************************************************************/
63 216
64/* mostly copied from op.c:cv_clone2 */ 217#define PRIO_MAX 3
65STATIC AV * 218#define PRIO_HIGH 1
66clone_padlist (AV *protopadlist) 219#define PRIO_NORMAL 0
220#define PRIO_LOW -1
221#define PRIO_IDLE -3
222#define PRIO_MIN -4
223
224/* for Coro.pm */
225static SV *coro_current;
226static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
227static int coro_nready;
228static struct coro *coro_first;
229
230/** lowlevel stuff **********************************************************/
231
232static AV *
233coro_clone_padlist (pTHX_ CV *cv)
67{ 234{
68 AV *av; 235 AV *padlist = CvPADLIST (cv);
69 I32 ix;
70 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
71 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
72 SV **pname = AvARRAY (protopad_name);
73 SV **ppad = AvARRAY (protopad);
74 I32 fname = AvFILLp (protopad_name);
75 I32 fpad = AvFILLp (protopad);
76 AV *newpadlist, *newpad_name, *newpad; 236 AV *newpadlist, *newpad;
77 SV **npad;
78
79 newpad_name = newAV ();
80 for (ix = fname; ix >= 0; ix--)
81 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
82
83 newpad = newAV ();
84 av_fill (newpad, AvFILLp (protopad));
85 npad = AvARRAY (newpad);
86 237
87 newpadlist = newAV (); 238 newpadlist = newAV ();
88 AvREAL_off (newpadlist); 239 AvREAL_off (newpadlist);
89 av_store (newpadlist, 0, (SV *) newpad_name); 240#if PERL_VERSION_ATLEAST (5,9,0)
241 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
242#else
243 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
244#endif
245 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
246 --AvFILLp (padlist);
247
248 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
90 av_store (newpadlist, 1, (SV *) newpad); 249 av_store (newpadlist, 1, (SV *)newpad);
91 250
92 av = newAV (); /* will be @_ */ 251 return newpadlist;
93 av_extend (av, 0); 252}
94 av_store (newpad, 0, (SV *) av);
95 AvFLAGS (av) = AVf_REIFY;
96 253
97 for (ix = fpad; ix > 0; ix--) 254static void
255free_padlist (pTHX_ AV *padlist)
256{
257 /* may be during global destruction */
258 if (SvREFCNT (padlist))
98 { 259 {
99 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 260 I32 i = AvFILLp (padlist);
100 if (namesv && namesv != &PL_sv_undef) 261 while (i >= 0)
101 { 262 {
102 char *name = SvPVX (namesv); /* XXX */ 263 SV **svp = av_fetch (padlist, i--, FALSE);
103 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 264 if (svp)
104 { /* lexical from outside? */
105 npad[ix] = SvREFCNT_inc (ppad[ix]);
106 } 265 {
107 else
108 { /* our own lexical */
109 SV *sv; 266 SV *sv;
110 if (*name == '&') 267 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
111 sv = SvREFCNT_inc (ppad[ix]); 268 SvREFCNT_dec (sv);
112 else if (*name == '@') 269
113 sv = (SV *) newAV (); 270 SvREFCNT_dec (*svp);
114 else if (*name == '%')
115 sv = (SV *) newHV ();
116 else
117 sv = NEWSV (0, 0);
118 if (!SvPADBUSY (sv))
119 SvPADMY_on (sv);
120 npad[ix] = sv;
121 } 271 }
122 } 272 }
123 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix])) 273
274 SvREFCNT_dec ((SV*)padlist);
275 }
276}
277
278static int
279coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
280{
281 AV *padlist;
282 AV *av = (AV *)mg->mg_obj;
283
284 /* casting is fun. */
285 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
286 free_padlist (aTHX_ padlist);
287
288 SvREFCNT_dec (av);
289
290 return 0;
291}
292
293#define PERL_MAGIC_coro PERL_MAGIC_ext
294
295static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
296
297#define CORO_MAGIC(cv) \
298 SvMAGIC (cv) \
299 ? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
300 ? SvMAGIC (cv) \
301 : mg_find ((SV *)cv, PERL_MAGIC_coro) \
302 : 0
303
304static struct coro *
305SvSTATE_ (pTHX_ SV *coro)
306{
307 HV *stash;
308 MAGIC *mg;
309
310 if (SvROK (coro))
311 coro = SvRV (coro);
312
313 stash = SvSTASH (coro);
314 if (stash != coro_stash && stash != coro_state_stash)
315 {
316 /* very slow, but rare, check */
317 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
318 croak ("Coro::State object required");
319 }
320
321 mg = CORO_MAGIC (coro);
322 return (struct coro *)mg->mg_ptr;
323}
324
325#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
326
327/* the next two functions merely cache the padlists */
328static void
329get_padlist (pTHX_ CV *cv)
330{
331 MAGIC *mg = CORO_MAGIC (cv);
332 AV *av;
333
334 if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
335 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
336 else
337 {
338#if CORO_PREFER_PERL_FUNCTIONS
339 /* this is probably cleaner, but also slower? */
340 CV *cp = Perl_cv_clone (cv);
341 CvPADLIST (cv) = CvPADLIST (cp);
342 CvPADLIST (cp) = 0;
343 SvREFCNT_dec (cp);
344#else
345 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
346#endif
347 }
348}
349
350static void
351put_padlist (pTHX_ CV *cv)
352{
353 MAGIC *mg = CORO_MAGIC (cv);
354 AV *av;
355
356 if (!mg)
357 {
358 sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
359 mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
360 mg->mg_virtual = &vtbl_coro;
361 mg->mg_obj = (SV *)newAV ();
362 }
363
364 av = (AV *)mg->mg_obj;
365
366 if (AvFILLp (av) >= AvMAX (av))
367 av_extend (av, AvMAX (av) + 1);
368
369 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
370}
371
372/** load & save, init *******************************************************/
373
374#define SB do {
375#define SE } while (0)
376
377#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
378
379static void
380load_perl (pTHX_ Coro__State c)
381{
382#define VAR(name,type) PL_ ## name = c->name;
383# include "state.h"
384#undef VAR
385
386 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
387 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
388 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
389 if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
390
391 if (c->irssv)
392 {
393 if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
124 { 394 {
125 npad[ix] = SvREFCNT_inc (ppad[ix]); 395 SvREFCNT_dec (c->irssv);
396 c->irssv = 0;
126 } 397 }
127 else 398 else
128 { 399 {
129 SV *sv = NEWSV (0, 0); 400 REPLACE_SV (PL_rs, c->irssv);
130 SvPADTMP_on (sv); 401 if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
131 npad[ix] = sv; 402 sv_setsv (c->irssv_sv, PL_rs);
132 } 403 }
133 } 404 }
134
135#if 0 /* return -ENOTUNDERSTOOD */
136 /* Now that vars are all in place, clone nested closures. */
137
138 for (ix = fpad; ix > 0; ix--) {
139 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
140 if (namesv
141 && namesv != &PL_sv_undef
142 && !(SvFLAGS(namesv) & SVf_FAKE)
143 && *SvPVX(namesv) == '&'
144 && CvCLONE(ppad[ix]))
145 {
146 CV *kid = cv_clone((CV*)ppad[ix]);
147 SvREFCNT_dec(ppad[ix]);
148 CvCLONE_on(kid);
149 SvPADMY_on(kid);
150 npad[ix] = (SV*)kid;
151 }
152 }
153#endif
154
155 return newpadlist;
156}
157
158#ifdef MAY_FLUSH
159STATIC AV *
160free_padlist (AV *padlist)
161{
162 /* may be during global destruction */
163 if (SvREFCNT(padlist))
164 {
165 I32 i = AvFILLp(padlist);
166 while (i >= 0)
167 {
168 SV **svp = av_fetch(padlist, i--, FALSE);
169 SV *sv = svp ? *svp : Nullsv;
170 if (sv)
171 SvREFCNT_dec(sv);
172 }
173
174 SvREFCNT_dec((SV*)padlist);
175 }
176}
177#endif
178
179/* the next two functions merely cache the padlists */
180STATIC void
181get_padlist (CV *cv)
182{
183 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
184
185 if (he && AvFILLp ((AV *)*he) >= 0)
186 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
187 else
188 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
189}
190
191STATIC void
192put_padlist (CV *cv)
193{
194 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
195
196 if (SvTYPE (*he) != SVt_PVAV)
197 {
198 SvREFCNT_dec (*he);
199 *he = (SV *)newAV ();
200 }
201
202 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
203}
204
205#ifdef MAY_FLUSH
206STATIC void
207flush_padlist_cache ()
208{
209 HV *hv = padlist_cache;
210 padlist_cache = newHV ();
211
212 if (hv_iterinit (hv))
213 {
214 HE *he;
215 AV *padlist;
216
217 while (!!(he = hv_iternext (hv)))
218 {
219 AV *av = (AV *)HeVAL(he);
220
221 /* casting is fun. */
222 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
223 free_padlist (padlist);
224 }
225 }
226
227 SvREFCNT_dec (hv);
228}
229#endif
230
231#define SB do {
232#define SE } while (0)
233
234#define LOAD(state) SB load_state(aTHX_ state); SPAGAIN; SE
235#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ state,flags); SE
236
237#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
238
239static void
240load_state(pTHX_ Coro__State c)
241{
242 PL_dowarn = c->dowarn;
243
244 PL_curstackinfo = c->curstackinfo;
245 PL_curstack = c->curstack;
246 PL_mainstack = c->mainstack;
247 PL_stack_sp = c->stack_sp;
248 PL_op = c->op;
249 PL_curpad = c->curpad;
250 PL_stack_base = c->stack_base;
251 PL_stack_max = c->stack_max;
252 PL_tmps_stack = c->tmps_stack;
253 PL_tmps_floor = c->tmps_floor;
254 PL_tmps_ix = c->tmps_ix;
255 PL_tmps_max = c->tmps_max;
256 PL_markstack = c->markstack;
257 PL_markstack_ptr = c->markstack_ptr;
258 PL_markstack_max = c->markstack_max;
259 PL_scopestack = c->scopestack;
260 PL_scopestack_ix = c->scopestack_ix;
261 PL_scopestack_max = c->scopestack_max;
262 PL_savestack = c->savestack;
263 PL_savestack_ix = c->savestack_ix;
264 PL_savestack_max = c->savestack_max;
265 PL_retstack = c->retstack;
266 PL_retstack_ix = c->retstack_ix;
267 PL_retstack_max = c->retstack_max;
268 PL_curcop = c->curcop;
269
270 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
271 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
272 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
273 405
274 { 406 {
275 dSP; 407 dSP;
276 CV *cv; 408 CV *cv;
277 409
278 /* now do the ugly restore mess */ 410 /* now do the ugly restore mess */
279 while ((cv = (CV *)POPs)) 411 while ((cv = (CV *)POPs))
280 { 412 {
281 AV *padlist = (AV *)POPs;
282
283 if (padlist)
284 {
285 put_padlist (cv); /* mark this padlist as available */ 413 put_padlist (aTHX_ cv); /* mark this padlist as available */
286 CvPADLIST(cv) = padlist; 414 CvDEPTH (cv) = PTR2IV (POPs);
287#ifdef USE_THREADS 415 CvPADLIST (cv) = (AV *)POPs;
288 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
289#endif
290 }
291
292 ++CvDEPTH(cv);
293 } 416 }
294 417
295 PUTBACK; 418 PUTBACK;
296 } 419 }
297} 420}
298 421
299static void 422static void
300save_state(pTHX_ Coro__State c, int flags) 423save_perl (pTHX_ Coro__State c)
301{ 424{
302 { 425 {
303 dSP; 426 dSP;
304 I32 cxix = cxstack_ix; 427 I32 cxix = cxstack_ix;
428 PERL_CONTEXT *ccstk = cxstack;
305 PERL_SI *top_si = PL_curstackinfo; 429 PERL_SI *top_si = PL_curstackinfo;
306 PERL_CONTEXT *ccstk = cxstack;
307 430
308 /* 431 /*
309 * the worst thing you can imagine happens first - we have to save 432 * the worst thing you can imagine happens first - we have to save
310 * (and reinitialize) all cv's in the whole callchain :( 433 * (and reinitialize) all cv's in the whole callchain :(
311 */ 434 */
312 435
313 PUSHs (Nullsv); 436 XPUSHs (Nullsv);
314 /* this loop was inspired by pp_caller */ 437 /* this loop was inspired by pp_caller */
315 for (;;) 438 for (;;)
316 { 439 {
317 do 440 while (cxix >= 0)
318 { 441 {
319 PERL_CONTEXT *cx = &ccstk[cxix--]; 442 PERL_CONTEXT *cx = &ccstk[cxix--];
320 443
321 if (CxTYPE(cx) == CXt_SUB) 444 if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
322 { 445 {
323 CV *cv = cx->blk_sub.cv; 446 CV *cv = cx->blk_sub.cv;
447
324 if (CvDEPTH(cv)) 448 if (CvDEPTH (cv))
325 { 449 {
326#ifdef USE_THREADS
327 /*XPUSHs ((SV *)CvOWNER(cv));*/
328 /*CvOWNER(cv) = 0;*/
329 /*error must unlock this cv etc.. etc...*/
330#endif
331 EXTEND (SP, CvDEPTH(cv)*2); 450 EXTEND (SP, 3);
332
333 while (--CvDEPTH(cv))
334 {
335 /* this tells the restore code to increment CvDEPTH */
336 PUSHs (Nullsv);
337 PUSHs ((SV *)cv);
338 }
339
340 PUSHs ((SV *)CvPADLIST(cv)); 451 PUSHs ((SV *)CvPADLIST (cv));
452 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
341 PUSHs ((SV *)cv); 453 PUSHs ((SV *)cv);
342 454
343 get_padlist (cv); /* this is a monster */ 455 CvDEPTH (cv) = 0;
456 get_padlist (aTHX_ cv);
344 } 457 }
345 } 458 }
346 else if (CxTYPE(cx) == CXt_FORMAT)
347 {
348 /* I never used formats, so how should I know how these are implemented? */
349 /* my bold guess is as a simple, plain sub... */
350 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
351 }
352 } 459 }
353 while (cxix >= 0);
354 460
355 if (top_si->si_type == PERLSI_MAIN) 461 if (top_si->si_type == PERLSI_MAIN)
356 break; 462 break;
357 463
358 top_si = top_si->si_prev; 464 top_si = top_si->si_prev;
359 ccstk = top_si->si_cxstack; 465 ccstk = top_si->si_cxstack;
360 cxix = top_si->si_cxix; 466 cxix = top_si->si_cxix;
361 } 467 }
362 468
363 PUTBACK; 469 PUTBACK;
364 } 470 }
365 471
366 c->defav = flags & SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 472 c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
367 c->defsv = flags & SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 473 c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
368 c->errsv = flags & SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 474 c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
475 c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
476 c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
369 477
370 c->dowarn = PL_dowarn; 478#define VAR(name,type)c->name = PL_ ## name;
479# include "state.h"
480#undef VAR
481}
371 482
372 c->curstackinfo = PL_curstackinfo; 483/*
373 c->curstack = PL_curstack; 484 * allocate various perl stacks. This is an exact copy
374 c->mainstack = PL_mainstack; 485 * of perl.c:init_stacks, except that it uses less memory
375 c->stack_sp = PL_stack_sp; 486 * on the (sometimes correct) assumption that coroutines do
376 c->op = PL_op; 487 * not usually need a lot of stackspace.
377 c->curpad = PL_curpad; 488 */
489#if CORO_PREFER_PERL_FUNCTIONS
490# define coro_init_stacks init_stacks
491#else
492static void
493coro_init_stacks (pTHX)
494{
495 PL_curstackinfo = new_stackinfo(64, 6);
496 PL_curstackinfo->si_type = PERLSI_MAIN;
497 PL_curstack = PL_curstackinfo->si_stack;
498 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
499
500 PL_stack_base = AvARRAY(PL_curstack);
378 c->stack_base = PL_stack_base; 501 PL_stack_sp = PL_stack_base;
379 c->stack_max = PL_stack_max; 502 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
380 c->tmps_stack = PL_tmps_stack; 503
381 c->tmps_floor = PL_tmps_floor; 504 New(50,PL_tmps_stack,64,SV*);
382 c->tmps_ix = PL_tmps_ix; 505 PL_tmps_floor = -1;
383 c->tmps_max = PL_tmps_max; 506 PL_tmps_ix = -1;
507 PL_tmps_max = 64;
508
509 New(54,PL_markstack,16,I32);
384 c->markstack = PL_markstack; 510 PL_markstack_ptr = PL_markstack;
385 c->markstack_ptr = PL_markstack_ptr; 511 PL_markstack_max = PL_markstack + 16;
386 c->markstack_max = PL_markstack_max; 512
387 c->scopestack = PL_scopestack; 513#ifdef SET_MARK_OFFSET
388 c->scopestack_ix = PL_scopestack_ix; 514 SET_MARK_OFFSET;
389 c->scopestack_max = PL_scopestack_max; 515#endif
390 c->savestack = PL_savestack; 516
391 c->savestack_ix = PL_savestack_ix; 517 New(54,PL_scopestack,16,I32);
392 c->savestack_max = PL_savestack_max; 518 PL_scopestack_ix = 0;
393 c->retstack = PL_retstack; 519 PL_scopestack_max = 16;
394 c->retstack_ix = PL_retstack_ix; 520
395 c->retstack_max = PL_retstack_max; 521 New(54,PL_savestack,64,ANY);
396 c->curcop = PL_curcop; 522 PL_savestack_ix = 0;
523 PL_savestack_max = 64;
524
525#if !PERL_VERSION_ATLEAST (5,9,0)
526 New(54,PL_retstack,4,OP*);
527 PL_retstack_ix = 0;
528 PL_retstack_max = 4;
529#endif
397} 530}
531#endif
398 532
399/* 533/*
400 * destroy the stacks, the callchain etc... 534 * destroy the stacks, the callchain etc...
401 * still there is a memleak of 128 bytes...
402 */ 535 */
403STATIC void 536static void
404destroy_stacks(pTHX) 537coro_destroy_stacks (pTHX)
405{ 538{
406 /* is this ugly, I ask? */ 539 if (!IN_DESTRUCT)
407 while (PL_scopestack_ix) 540 {
408 LEAVE; 541 /* restore all saved variables and stuff */
542 LEAVE_SCOPE (0);
543 assert (PL_tmps_floor == -1);
409 544
410 /* sure it is, but more important: is it correct?? :/ */ 545 /* free all temporaries */
411 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
412 FREETMPS; 546 FREETMPS;
547 assert (PL_tmps_ix == -1);
548
549 /* unwind all extra stacks */
550 POPSTACK_TO (PL_mainstack);
551
552 /* unwind main stack */
553 dounwind (-1);
554 }
413 555
414 while (PL_curstackinfo->si_next) 556 while (PL_curstackinfo->si_next)
415 PL_curstackinfo = PL_curstackinfo->si_next; 557 PL_curstackinfo = PL_curstackinfo->si_next;
416 558
417 while (PL_curstackinfo) 559 while (PL_curstackinfo)
418 { 560 {
419 PERL_SI *p = PL_curstackinfo->si_prev; 561 PERL_SI *p = PL_curstackinfo->si_prev;
420 562
421 { 563 if (!IN_DESTRUCT)
422 dSP;
423 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
424 PUTBACK; /* possibly superfluous */
425 }
426
427 dounwind(-1);
428
429 SvREFCNT_dec(PL_curstackinfo->si_stack); 564 SvREFCNT_dec (PL_curstackinfo->si_stack);
565
430 Safefree(PL_curstackinfo->si_cxstack); 566 Safefree (PL_curstackinfo->si_cxstack);
431 Safefree(PL_curstackinfo); 567 Safefree (PL_curstackinfo);
432 PL_curstackinfo = p; 568 PL_curstackinfo = p;
433 } 569 }
434 570
435 Safefree(PL_tmps_stack); 571 Safefree (PL_tmps_stack);
436 Safefree(PL_markstack); 572 Safefree (PL_markstack);
437 Safefree(PL_scopestack); 573 Safefree (PL_scopestack);
438 Safefree(PL_savestack); 574 Safefree (PL_savestack);
575#if !PERL_VERSION_ATLEAST (5,9,0)
439 Safefree(PL_retstack); 576 Safefree (PL_retstack);
577#endif
440} 578}
441 579
442#define SUB_INIT "Coro::State::_newcoro" 580static size_t
581coro_rss (struct coro *coro)
582{
583 size_t rss = sizeof (coro);
584
585 if (coro->mainstack)
586 {
587 if (coro->flags & CF_RUNNING)
588 {
589 #define VAR(name,type)coro->name = PL_ ## name;
590 # include "state.h"
591 #undef VAR
592 }
593
594 rss += sizeof (coro->curstackinfo);
595 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
596 rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
597 rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
598 rss += coro->tmps_max * sizeof (SV *);
599 rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
600 rss += coro->scopestack_max * sizeof (I32);
601 rss += coro->savestack_max * sizeof (ANY);
602
603#if !PERL_VERSION_ATLEAST (5,9,0)
604 rss += coro->retstack_max * sizeof (OP *);
605#endif
606 }
607
608 return rss;
609}
610
611/** coroutine stack handling ************************************************/
612
613static void
614setup_coro (pTHX_ struct coro *coro)
615{
616 /*
617 * emulate part of the perl startup here.
618 */
619 coro_init_stacks (aTHX);
620
621 PL_runops = RUNOPS_DEFAULT;
622 PL_curcop = &PL_compiling;
623 PL_in_eval = EVAL_NULL;
624 PL_comppad = 0;
625 PL_curpm = 0;
626 PL_localizing = 0;
627 PL_dirty = 0;
628 PL_restartop = 0;
629
630 {
631 dSP;
632 LOGOP myop;
633
634 SvREFCNT_dec (GvAV (PL_defgv));
635 GvAV (PL_defgv) = coro->args; coro->args = 0;
636
637 Zero (&myop, 1, LOGOP);
638 myop.op_next = Nullop;
639 myop.op_flags = OPf_WANT_VOID;
640
641 PUSHMARK (SP);
642 XPUSHs (av_shift (GvAV (PL_defgv)));
643 PUTBACK;
644 PL_op = (OP *)&myop;
645 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
646 SPAGAIN;
647 }
648
649 ENTER; /* necessary e.g. for dounwind */
650}
651
652static void
653free_coro_mortal (pTHX)
654{
655 if (coro_mortal)
656 {
657 SvREFCNT_dec (coro_mortal);
658 coro_mortal = 0;
659 }
660}
661
662static int
663runops_trace (pTHX)
664{
665 COP *oldcop = 0;
666 int oldcxix = -2;
667 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
668 coro_cctx *cctx = coro->cctx;
669
670 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
671 {
672 PERL_ASYNC_CHECK ();
673
674 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
675 {
676 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
677 SV **bot, **top;
678 AV *av = newAV (); /* return values */
679 SV **cb;
680 runops_proc_t old_runops = PL_runops;
681 dSP;
682 ENTER;
683 SAVETMPS;
684 EXTEND (SP, 3);
685 PL_runops = RUNOPS_DEFAULT;
686
687 GV *gv = CvGV (cx->blk_sub.cv);
688 SV *fullname = sv_2mortal (newSV (0));
689 if (isGV (gv))
690 gv_efullname3 (fullname, gv, 0);
691
692 bot = PL_stack_base + cx->blk_oldsp + 1;
693 top = cx->blk_gimme == G_ARRAY ? SP + 1
694 : cx->blk_gimme == G_SCALAR ? bot + 1
695 : bot;
696
697 while (bot < top)
698 av_push (av, SvREFCNT_inc (*bot++));
699
700 PUSHMARK (SP);
701 PUSHs (&PL_sv_no);
702 PUSHs (fullname);
703 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
704 PUTBACK;
705 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
706 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
707 SPAGAIN;
708
709 FREETMPS;
710 LEAVE;
711 PL_runops = old_runops;
712 }
713
714 if (oldcop != PL_curcop)
715 {
716 oldcop = PL_curcop;
717
718 if (PL_curcop != &PL_compiling)
719 {
720 SV **cb;
721 runops_proc_t old_runops = PL_runops;
722 dSP;
723 ENTER;
724 SAVETMPS;
725 EXTEND (SP, 3);
726 PL_runops = RUNOPS_DEFAULT;
727
728 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
729 {
730 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
731
732 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
733 {
734 GV *gv = CvGV (cx->blk_sub.cv);
735 SV *fullname = sv_2mortal (newSV (0));
736 if (isGV (gv))
737 gv_efullname3 (fullname, gv, 0);
738
739 PUSHMARK (SP);
740 PUSHs (&PL_sv_yes);
741 PUSHs (fullname);
742 PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
743 PUTBACK;
744 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
745 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
746 SPAGAIN;
747 }
748
749 oldcxix = cxstack_ix;
750 }
751
752 if (cctx->flags & CC_TRACE_LINE)
753 {
754 PUSHMARK (SP);
755 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
756 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
757 PUTBACK;
758 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
759 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
760 SPAGAIN;
761 }
762
763 FREETMPS;
764 LEAVE;
765 PL_runops = old_runops;
766 }
767 }
768 }
769
770 TAINT_NOT;
771 return 0;
772}
773
774/* inject a fake call to Coro::State::_cctx_init into the execution */
775/* _cctx_init should be careful, as it could be called at almost any time */
776/* during execution of a perl program */
777static void NOINLINE
778prepare_cctx (pTHX_ coro_cctx *cctx)
779{
780 dSP;
781 LOGOP myop;
782
783 PL_top_env = &PL_start_env;
784
785 if (cctx->flags & CC_TRACE)
786 PL_runops = runops_trace;
787
788 Zero (&myop, 1, LOGOP);
789 myop.op_next = PL_op;
790 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
791
792 PUSHMARK (SP);
793 EXTEND (SP, 2);
794 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
795 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
796 PUTBACK;
797 PL_op = (OP *)&myop;
798 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
799 SPAGAIN;
800}
801
802/*
803 * this is a _very_ stripped down perl interpreter ;)
804 */
805static void
806coro_run (void *arg)
807{
808 dTHX;
809
810 /* coro_run is the alternative tail of transfer(), so unlock here. */
811 UNLOCK;
812
813 /* we now skip the entersub that lead to transfer() */
814 PL_op = PL_op->op_next;
815
816 /* inject a fake subroutine call to cctx_init */
817 prepare_cctx (aTHX_ (coro_cctx *)arg);
818
819 /* somebody or something will hit me for both perl_run and PL_restartop */
820 PL_restartop = PL_op;
821 perl_run (PL_curinterp);
822
823 /*
824 * If perl-run returns we assume exit() was being called or the coro
825 * fell off the end, which seems to be the only valid (non-bug)
826 * reason for perl_run to return. We try to exit by jumping to the
827 * bootstrap-time "top" top_env, as we cannot restore the "main"
828 * coroutine as Coro has no such concept
829 */
830 PL_top_env = main_top_env;
831 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
832}
833
834static coro_cctx *
835cctx_new ()
836{
837 coro_cctx *cctx;
838 void *stack_start;
839 size_t stack_size;
840
841 ++cctx_count;
842
843 Newz (0, cctx, 1, coro_cctx);
844
845#if HAVE_MMAP
846
847 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
848 /* mmap supposedly does allocate-on-write for us */
849 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
850
851 if (cctx->sptr != (void *)-1)
852 {
853# if CORO_STACKGUARD
854 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
855# endif
856 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
857 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
858 cctx->flags |= CC_MAPPED;
859 }
860 else
861#endif
862 {
863 cctx->ssize = coro_stacksize * (long)sizeof (long);
864 New (0, cctx->sptr, coro_stacksize, long);
865
866 if (!cctx->sptr)
867 {
868 perror ("FATAL: unable to allocate stack for coroutine");
869 _exit (EXIT_FAILURE);
870 }
871
872 stack_start = cctx->sptr;
873 stack_size = cctx->ssize;
874 }
875
876 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
877 coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
878
879 return cctx;
880}
881
882static void
883cctx_destroy (coro_cctx *cctx)
884{
885 if (!cctx)
886 return;
887
888 --cctx_count;
889
890#if CORO_USE_VALGRIND
891 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
892#endif
893
894#if HAVE_MMAP
895 if (cctx->flags & CC_MAPPED)
896 munmap (cctx->sptr, cctx->ssize);
897 else
898#endif
899 Safefree (cctx->sptr);
900
901 Safefree (cctx);
902}
903
904static coro_cctx *
905cctx_get (pTHX)
906{
907 while (cctx_first)
908 {
909 coro_cctx *cctx = cctx_first;
910 cctx_first = cctx->next;
911 --cctx_idle;
912
913 if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
914 return cctx;
915
916 cctx_destroy (cctx);
917 }
918
919 return cctx_new ();
920}
921
922static void
923cctx_put (coro_cctx *cctx)
924{
925 /* free another cctx if overlimit */
926 if (cctx_idle >= MAX_IDLE_CCTX)
927 {
928 coro_cctx *first = cctx_first;
929 cctx_first = first->next;
930 --cctx_idle;
931
932 cctx_destroy (first);
933 }
934
935 ++cctx_idle;
936 cctx->next = cctx_first;
937 cctx_first = cctx;
938}
939
940/** coroutine switching *****************************************************/
941
942static void NOINLINE
943transfer_check (pTHX_ struct coro *prev, struct coro *next)
944{
945 if (prev != next)
946 {
947 if (!(prev->flags & (CF_RUNNING | CF_NEW)))
948 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
949
950 if (next->flags & CF_RUNNING)
951 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
952
953 if (next->flags & CF_DESTROYED)
954 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
955
956 if (PL_lex_state != LEX_NOTPARSING)
957 croak ("Coro::State::transfer called while parsing, but this is not supported");
958 }
959}
960
961/* always use the TRANSFER macro */
962static void NOINLINE
963transfer (pTHX_ struct coro *prev, struct coro *next)
964{
965 dSTACKLEVEL;
966
967 /* sometimes transfer is only called to set idle_sp */
968 if (!next)
969 {
970 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
971 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
972 }
973 else if (prev != next)
974 {
975 coro_cctx *prev__cctx;
976
977 if (prev->flags & CF_NEW)
978 {
979 /* create a new empty context */
980 Newz (0, prev->cctx, 1, coro_cctx);
981 prev->flags &= ~CF_NEW;
982 prev->flags |= CF_RUNNING;
983 }
984
985 prev->flags &= ~CF_RUNNING;
986 next->flags |= CF_RUNNING;
987
988 LOCK;
989
990 if (next->flags & CF_NEW)
991 {
992 /* need to start coroutine */
993 next->flags &= ~CF_NEW;
994 /* first get rid of the old state */
995 save_perl (aTHX_ prev);
996 /* setup coroutine call */
997 setup_coro (aTHX_ next);
998 }
999 else
1000 {
1001 /* coroutine already started */
1002 save_perl (aTHX_ prev);
1003 load_perl (aTHX_ next);
1004 }
1005
1006 prev__cctx = prev->cctx;
1007
1008 /* possibly "free" the cctx */
1009 if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
1010 {
1011 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1012 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
1013
1014 prev->cctx = 0;
1015
1016 cctx_put (prev__cctx);
1017 }
1018
1019 if (!next->cctx)
1020 next->cctx = cctx_get (aTHX);
1021
1022 if (prev__cctx != next->cctx)
1023 {
1024 prev__cctx->top_env = PL_top_env;
1025 PL_top_env = next->cctx->top_env;
1026 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1027 }
1028
1029 free_coro_mortal (aTHX);
1030 UNLOCK;
1031 }
1032}
1033
1034struct transfer_args
1035{
1036 struct coro *prev, *next;
1037};
1038
1039#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
1040#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1041
1042/** high level stuff ********************************************************/
1043
1044static int
1045coro_state_destroy (pTHX_ struct coro *coro)
1046{
1047 if (coro->flags & CF_DESTROYED)
1048 return 0;
1049
1050 coro->flags |= CF_DESTROYED;
1051
1052 if (coro->flags & CF_READY)
1053 {
1054 /* reduce nready, as destroying a ready coro effectively unreadies it */
1055 /* alternative: look through all ready queues and remove the coro */
1056 LOCK;
1057 --coro_nready;
1058 UNLOCK;
1059 }
1060 else
1061 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1062
1063 if (coro->mainstack && coro->mainstack != main_mainstack)
1064 {
1065 struct coro temp;
1066
1067 assert (!(coro->flags & CF_RUNNING));
1068
1069 Zero (&temp, 1, struct coro);
1070 temp.save = CORO_SAVE_ALL;
1071
1072 if (coro->flags & CF_RUNNING)
1073 croak ("FATAL: tried to destroy currently running coroutine");
1074
1075 save_perl (aTHX_ &temp);
1076 load_perl (aTHX_ coro);
1077
1078 coro_destroy_stacks (aTHX);
1079
1080 load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
1081
1082 coro->mainstack = 0;
1083 }
1084
1085 cctx_destroy (coro->cctx);
1086 SvREFCNT_dec (coro->args);
1087
1088 if (coro->next) coro->next->prev = coro->prev;
1089 if (coro->prev) coro->prev->next = coro->next;
1090 if (coro == coro_first) coro_first = coro->next;
1091
1092 return 1;
1093}
1094
1095static int
1096coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1097{
1098 struct coro *coro = (struct coro *)mg->mg_ptr;
1099 mg->mg_ptr = 0;
1100
1101 coro->hv = 0;
1102
1103 if (--coro->refcnt < 0)
1104 {
1105 coro_state_destroy (aTHX_ coro);
1106 Safefree (coro);
1107 }
1108
1109 return 0;
1110}
1111
1112static int
1113coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1114{
1115 struct coro *coro = (struct coro *)mg->mg_ptr;
1116
1117 ++coro->refcnt;
1118
1119 return 0;
1120}
1121
1122static MGVTBL coro_state_vtbl = {
1123 0, 0, 0, 0,
1124 coro_state_free,
1125 0,
1126#ifdef MGf_DUP
1127 coro_state_dup,
1128#else
1129# define MGf_DUP 0
1130#endif
1131};
1132
1133static void
1134prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1135{
1136 ta->prev = SvSTATE (prev_sv);
1137 ta->next = SvSTATE (next_sv);
1138 TRANSFER_CHECK (*ta);
1139}
1140
1141static void
1142api_transfer (SV *prev_sv, SV *next_sv)
1143{
1144 dTHX;
1145 struct transfer_args ta;
1146
1147 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1148 TRANSFER (ta);
1149}
1150
1151static int
1152api_save (SV *coro_sv, int new_save)
1153{
1154 dTHX;
1155 struct coro *coro = SvSTATE (coro_sv);
1156 int old_save = coro->save;
1157
1158 if (new_save >= 0)
1159 coro->save = new_save;
1160
1161 return old_save;
1162}
1163
1164/** Coro ********************************************************************/
1165
1166static void
1167coro_enq (pTHX_ SV *coro_sv)
1168{
1169 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1170}
1171
1172static SV *
1173coro_deq (pTHX_ int min_prio)
1174{
1175 int prio = PRIO_MAX - PRIO_MIN;
1176
1177 min_prio -= PRIO_MIN;
1178 if (min_prio < 0)
1179 min_prio = 0;
1180
1181 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
1182 if (AvFILLp (coro_ready [prio]) >= 0)
1183 return av_shift (coro_ready [prio]);
1184
1185 return 0;
1186}
1187
1188static int
1189api_ready (SV *coro_sv)
1190{
1191 dTHX;
1192 struct coro *coro;
1193
1194 if (SvROK (coro_sv))
1195 coro_sv = SvRV (coro_sv);
1196
1197 coro = SvSTATE (coro_sv);
1198
1199 if (coro->flags & CF_READY)
1200 return 0;
1201
1202 coro->flags |= CF_READY;
1203
1204 LOCK;
1205 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1206 ++coro_nready;
1207 UNLOCK;
1208
1209 return 1;
1210}
1211
1212static int
1213api_is_ready (SV *coro_sv)
1214{
1215 dTHX;
1216 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1217}
1218
1219static void
1220prepare_schedule (pTHX_ struct transfer_args *ta)
1221{
1222 SV *prev_sv, *next_sv;
1223
1224 for (;;)
1225 {
1226 LOCK;
1227 next_sv = coro_deq (aTHX_ PRIO_MIN);
1228
1229 /* nothing to schedule: call the idle handler */
1230 if (!next_sv)
1231 {
1232 dSP;
1233 UNLOCK;
1234
1235 ENTER;
1236 SAVETMPS;
1237
1238 PUSHMARK (SP);
1239 PUTBACK;
1240 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1241
1242 FREETMPS;
1243 LEAVE;
1244 continue;
1245 }
1246
1247 ta->next = SvSTATE (next_sv);
1248
1249 /* cannot transfer to destroyed coros, skip and look for next */
1250 if (ta->next->flags & CF_DESTROYED)
1251 {
1252 UNLOCK;
1253 SvREFCNT_dec (next_sv);
1254 /* coro_nready is already taken care of by destroy */
1255 continue;
1256 }
1257
1258 --coro_nready;
1259 UNLOCK;
1260 break;
1261 }
1262
1263 /* free this only after the transfer */
1264 prev_sv = SvRV (coro_current);
1265 ta->prev = SvSTATE (prev_sv);
1266 TRANSFER_CHECK (*ta);
1267 assert (ta->next->flags & CF_READY);
1268 ta->next->flags &= ~CF_READY;
1269 SvRV_set (coro_current, next_sv);
1270
1271 LOCK;
1272 free_coro_mortal (aTHX);
1273 coro_mortal = prev_sv;
1274 UNLOCK;
1275}
1276
1277static void
1278prepare_cede (pTHX_ struct transfer_args *ta)
1279{
1280 api_ready (coro_current);
1281 prepare_schedule (aTHX_ ta);
1282}
1283
1284static int
1285prepare_cede_notself (pTHX_ struct transfer_args *ta)
1286{
1287 if (coro_nready)
1288 {
1289 SV *prev = SvRV (coro_current);
1290 prepare_schedule (aTHX_ ta);
1291 api_ready (prev);
1292 return 1;
1293 }
1294 else
1295 return 0;
1296}
1297
1298static void
1299api_schedule (void)
1300{
1301 dTHX;
1302 struct transfer_args ta;
1303
1304 prepare_schedule (aTHX_ &ta);
1305 TRANSFER (ta);
1306}
1307
1308static int
1309api_cede (void)
1310{
1311 dTHX;
1312 struct transfer_args ta;
1313
1314 prepare_cede (aTHX_ &ta);
1315
1316 if (ta.prev != ta.next)
1317 {
1318 TRANSFER (ta);
1319 return 1;
1320 }
1321 else
1322 return 0;
1323}
1324
1325static int
1326api_cede_notself (void)
1327{
1328 dTHX;
1329 struct transfer_args ta;
1330
1331 if (prepare_cede_notself (aTHX_ &ta))
1332 {
1333 TRANSFER (ta);
1334 return 1;
1335 }
1336 else
1337 return 0;
1338}
443 1339
444MODULE = Coro::State PACKAGE = Coro::State 1340MODULE = Coro::State PACKAGE = Coro::State
445 1341
446PROTOTYPES: ENABLE 1342PROTOTYPES: DISABLE
447 1343
448BOOT: 1344BOOT:
1345{
1346#ifdef USE_ITHREADS
1347 MUTEX_INIT (&coro_mutex);
1348#endif
1349 BOOT_PAGESIZE;
1350
449 HV * stash = gv_stashpvn("Coro::State", 10, TRUE); 1351 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
450 1352
1353 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1354 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1355 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1356 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1357
451 newCONSTSUB (stash, "SAVE_DEFAV", newSViv (SAVE_DEFAV)); 1358 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
452 newCONSTSUB (stash, "SAVE_DEFSV", newSViv (SAVE_DEFSV)); 1359 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
453 newCONSTSUB (stash, "SAVE_ERRSV", newSViv (SAVE_ERRSV)); 1360 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1361 newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1362 newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
1363 newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
1364 newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
454 1365
455 if (!padlist_cache) 1366 main_mainstack = PL_mainstack;
456 padlist_cache = newHV (); 1367 main_top_env = PL_top_env;
457 1368
458Coro::State 1369 while (main_top_env->je_prev)
459_newprocess(args) 1370 main_top_env = main_top_env->je_prev;
460 SV * args 1371
461 PROTOTYPE: $ 1372 coroapi.ver = CORO_API_VERSION;
1373 coroapi.transfer = api_transfer;
1374
1375 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1376}
1377
1378SV *
1379new (char *klass, ...)
462 CODE: 1380 CODE:
463 Coro__State coro; 1381{
1382 struct coro *coro;
1383 HV *hv;
1384 int i;
464 1385
465 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
466 croak ("Coro::State::_newprocess expects an arrayref");
467
468 New (0, coro, 1, struct coro); 1386 Newz (0, coro, 1, struct coro);
1387 coro->args = newAV ();
1388 coro->save = CORO_SAVE_DEF;
1389 coro->flags = CF_NEW;
469 1390
470 coro->mainstack = 0; /* actual work is done inside transfer */ 1391 if (coro_first) coro_first->prev = coro;
471 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1392 coro->next = coro_first;
1393 coro_first = coro;
472 1394
473 RETVAL = coro; 1395 coro->hv = hv = newHV ();
1396 sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1397 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1398
1399 for (i = 1; i < items; i++)
1400 av_push (coro->args, newSVsv (ST (i)));
1401}
474 OUTPUT: 1402 OUTPUT:
475 RETVAL 1403 RETVAL
476 1404
1405int
1406save (SV *coro, int new_save = -1)
1407 CODE:
1408 RETVAL = api_save (coro, new_save);
1409 OUTPUT:
1410 RETVAL
1411
1412int
1413save_also (SV *coro_sv, int save_also)
1414 CODE:
1415{
1416 struct coro *coro = SvSTATE (coro_sv);
1417 RETVAL = coro->save;
1418 coro->save |= save_also;
1419}
1420 OUTPUT:
1421 RETVAL
1422
477void 1423void
478transfer(prev, next, flags = SAVE_DEFAV) 1424_set_stacklevel (...)
479 Coro::State_or_hashref prev 1425 ALIAS:
480 Coro::State_or_hashref next 1426 Coro::State::transfer = 1
481 int flags 1427 Coro::schedule = 2
1428 Coro::cede = 3
1429 Coro::cede_notself = 4
482 CODE: 1430 CODE:
1431{
1432 struct transfer_args ta;
483 1433
484 if (prev != next) 1434 switch (ix)
485 { 1435 {
486 /*
487 * this could be done in newprocess which would lead to
488 * extremely elegant and fast (just SAVE/LOAD)
489 * code here, but lazy allocation of stacks has also
490 * some virtues and the overhead of the if() is nil.
491 */
492 if (next->mainstack)
493 {
494 SAVE (prev, flags);
495 LOAD (next);
496 /* mark this state as in-use */
497 next->mainstack = 0;
498 next->tmps_ix = -2;
499 }
500 else if (next->tmps_ix == -2)
501 {
502 croak ("tried to transfer to running coroutine");
503 }
504 else 1436 case 0:
1437 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1438 ta.next = 0;
505 { 1439 break;
506 /*
507 * emulate part of the perl startup here.
508 */
509 UNOP myop;
510 1440
511 SAVE (prev, -1); /* first get rid of the old state */ 1441 case 1:
1442 if (items != 2)
1443 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
512 1444
513 init_stacks (); /* from perl.c */ 1445 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
514 SPAGAIN;
515
516 PL_op = (OP *)&myop;
517 /*PL_curcop = 0;*/
518 SvREFCNT_dec (GvAV (PL_defgv));
519 GvAV (PL_defgv) = next->args;
520
521 Zero(&myop, 1, UNOP);
522 myop.op_next = Nullop;
523 myop.op_flags = OPf_WANT_VOID;
524
525 PUSHMARK(SP);
526 XPUSHs ((SV*)get_cv(SUB_INIT, TRUE));
527 /*
528 * the next line is slightly wrong, as PL_op->op_next
529 * is actually being executed so we skip the first op.
530 * that doesn't matter, though, since it is only
531 * pp_nextstate and we never return...
532 * ah yes, and I don't care anyways ;)
533 */
534 PUTBACK;
535 PL_op = pp_entersub(aTHX);
536 SPAGAIN;
537
538 ENTER; /* necessary e.g. for dounwind */
539 } 1446 break;
1447
1448 case 2:
1449 prepare_schedule (aTHX_ &ta);
1450 break;
1451
1452 case 3:
1453 prepare_cede (aTHX_ &ta);
1454 break;
1455
1456 case 4:
1457 if (!prepare_cede_notself (aTHX_ &ta))
1458 XSRETURN_EMPTY;
1459
1460 break;
540 } 1461 }
541 1462
1463 BARRIER;
1464 TRANSFER (ta);
1465
1466 if (GIMME_V != G_VOID && ta.next != ta.prev)
1467 XSRETURN_YES;
1468}
1469
1470bool
1471_destroy (SV *coro_sv)
1472 CODE:
1473 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1474 OUTPUT:
1475 RETVAL
1476
542void 1477void
543DESTROY(coro) 1478_exit (code)
544 Coro::State coro 1479 int code
545 CODE: 1480 PROTOTYPE: $
1481 CODE:
1482 _exit (code);
546 1483
1484int
1485cctx_stacksize (int new_stacksize = 0)
1486 CODE:
1487 RETVAL = coro_stacksize;
1488 if (new_stacksize)
1489 coro_stacksize = new_stacksize;
1490 OUTPUT:
1491 RETVAL
1492
1493int
1494cctx_count ()
1495 CODE:
1496 RETVAL = cctx_count;
1497 OUTPUT:
1498 RETVAL
1499
1500int
1501cctx_idle ()
1502 CODE:
1503 RETVAL = cctx_idle;
1504 OUTPUT:
1505 RETVAL
1506
1507void
1508list ()
1509 PPCODE:
1510{
1511 struct coro *coro;
1512 for (coro = coro_first; coro; coro = coro->next)
1513 if (coro->hv)
1514 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1515}
1516
1517void
1518call (Coro::State coro, SV *coderef)
1519 ALIAS:
1520 eval = 1
1521 CODE:
1522{
547 if (coro->mainstack) 1523 if (coro->mainstack)
548 { 1524 {
549 struct coro temp; 1525 struct coro temp;
1526 Zero (&temp, 1, struct coro);
1527 temp.save = CORO_SAVE_ALL;
550 1528
551 SAVE(aTHX_ (&temp), SAVE_ALL); 1529 if (!(coro->flags & CF_RUNNING))
552 LOAD(aTHX_ coro); 1530 {
1531 save_perl (aTHX_ &temp);
1532 load_perl (aTHX_ coro);
1533 }
553 1534
554 destroy_stacks (); 1535 {
1536 dSP;
1537 ENTER;
1538 SAVETMPS;
1539 PUSHMARK (SP);
1540 PUTBACK;
1541 if (ix)
1542 eval_sv (coderef, 0);
1543 else
1544 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1545 SPAGAIN;
1546 FREETMPS;
1547 LEAVE;
1548 PUTBACK;
1549 }
555 1550
556 LOAD((&temp)); /* this will get rid of defsv etc.. */ 1551 if (!(coro->flags & CF_RUNNING))
1552 {
1553 save_perl (aTHX_ coro);
1554 load_perl (aTHX_ &temp);
1555 }
557 } 1556 }
558 1557}
559 Safefree (coro); 1558
1559SV *
1560is_ready (Coro::State coro)
1561 PROTOTYPE: $
1562 ALIAS:
1563 is_ready = CF_READY
1564 is_running = CF_RUNNING
1565 is_new = CF_NEW
1566 is_destroyed = CF_DESTROYED
1567 CODE:
1568 RETVAL = boolSV (coro->flags & ix);
1569 OUTPUT:
1570 RETVAL
560 1571
561void 1572void
562flush() 1573trace (Coro::State coro, int flags = CC_TRACE | CC_TRACE_SUB)
563 CODE: 1574 CODE:
564#ifdef MAY_FLUSH 1575 if (flags & CC_TRACE)
565 flush_padlist_cache (); 1576 {
566#endif 1577 if (!coro->cctx)
1578 coro->cctx = cctx_new ();
1579 else if (!(coro->cctx->flags & CC_TRACE))
1580 croak ("cannot enable tracing on coroutine with custom stack");
567 1581
1582 coro->cctx->flags |= flags & (CC_TRACE | CC_TRACE_ALL);
1583 }
1584 else
1585 if (coro->cctx && coro->cctx->flags & CC_TRACE)
1586 {
1587 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1588 coro->cctx->flags |= CC_NOREUSE;
568 1589
1590 if (coro->flags & CF_RUNNING)
1591 PL_runops = RUNOPS_DEFAULT;
1592 else
1593 coro->runops = RUNOPS_DEFAULT;
1594 }
1595
1596SV *
1597has_stack (Coro::State coro)
1598 PROTOTYPE: $
1599 CODE:
1600 RETVAL = boolSV (!!coro->cctx);
1601 OUTPUT:
1602 RETVAL
1603
1604int
1605is_traced (Coro::State coro)
1606 PROTOTYPE: $
1607 CODE:
1608 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1609 OUTPUT:
1610 RETVAL
1611
1612IV
1613rss (Coro::State coro)
1614 PROTOTYPE: $
1615 CODE:
1616 RETVAL = coro_rss (coro);
1617 OUTPUT:
1618 RETVAL
1619
1620
1621MODULE = Coro::State PACKAGE = Coro
1622
1623BOOT:
1624{
1625 int i;
1626
1627 sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
1628 sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
1629 av_async_pool = get_av ("Coro::async_pool", TRUE);
1630
1631 coro_current = get_sv ("Coro::current", FALSE);
1632 SvREADONLY_on (coro_current);
1633
1634 coro_stash = gv_stashpv ("Coro", TRUE);
1635
1636 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1637 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1638 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1639 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1640 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1641 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1642
1643 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1644 coro_ready[i] = newAV ();
1645
1646 {
1647 SV *sv = perl_get_sv("Coro::API", 1);
1648
1649 coroapi.schedule = api_schedule;
1650 coroapi.save = api_save;
1651 coroapi.cede = api_cede;
1652 coroapi.cede_notself = api_cede_notself;
1653 coroapi.ready = api_ready;
1654 coroapi.is_ready = api_is_ready;
1655 coroapi.nready = &coro_nready;
1656 coroapi.current = coro_current;
1657
1658 GCoroAPI = &coroapi;
1659 sv_setiv (sv, (IV)&coroapi);
1660 SvREADONLY_on (sv);
1661 }
1662}
1663
1664void
1665_set_current (SV *current)
1666 PROTOTYPE: $
1667 CODE:
1668 SvREFCNT_dec (SvRV (coro_current));
1669 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1670
1671int
1672prio (Coro::State coro, int newprio = 0)
1673 ALIAS:
1674 nice = 1
1675 CODE:
1676{
1677 RETVAL = coro->prio;
1678
1679 if (items > 1)
1680 {
1681 if (ix)
1682 newprio = coro->prio - newprio;
1683
1684 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1685 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1686
1687 coro->prio = newprio;
1688 }
1689}
1690 OUTPUT:
1691 RETVAL
1692
1693SV *
1694ready (SV *self)
1695 PROTOTYPE: $
1696 CODE:
1697 RETVAL = boolSV (api_ready (self));
1698 OUTPUT:
1699 RETVAL
1700
1701int
1702nready (...)
1703 PROTOTYPE:
1704 CODE:
1705 RETVAL = coro_nready;
1706 OUTPUT:
1707 RETVAL
1708
1709# for async_pool speedup
1710void
1711_pool_1 (SV *cb)
1712 CODE:
1713{
1714 int i, len;
1715 HV *hv = (HV *)SvRV (coro_current);
1716 AV *defav = GvAV (PL_defgv);
1717 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1718 AV *invoke_av;
1719
1720 if (!invoke)
1721 croak ("\3terminate\2\n");
1722
1723 hv_store (hv, "desc", sizeof ("desc") - 1,
1724 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1725
1726 invoke_av = (AV *)SvRV (invoke);
1727 len = av_len (invoke_av);
1728
1729 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1730
1731 if (len > 0)
1732 {
1733 av_fill (defav, len - 1);
1734 for (i = 0; i < len; ++i)
1735 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
1736 }
1737
1738 SvREFCNT_dec (invoke);
1739}
1740
1741void
1742_pool_2 (SV *cb)
1743 CODE:
1744{
1745 struct coro *coro = SvSTATE (coro_current);
1746
1747 sv_setsv (cb, &PL_sv_undef);
1748
1749 if (coro_rss (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 coro->save = CORO_SAVE_DEF;
1757 coro->prio = 0;
1758 av_push (av_async_pool, newSVsv (coro_current));
1759}
1760
1761
1762MODULE = Coro::State PACKAGE = Coro::AIO
1763
1764SV *
1765_get_state ()
1766 CODE:
1767{
1768 struct io_state *data;
1769
1770 RETVAL = newSV (sizeof (struct io_state));
1771 data = (struct io_state *)SvPVX (RETVAL);
1772 SvCUR_set (RETVAL, sizeof (struct io_state));
1773 SvPOK_only (RETVAL);
1774
1775 data->errorno = errno;
1776 data->laststype = PL_laststype;
1777 data->laststatval = PL_laststatval;
1778 data->statcache = PL_statcache;
1779}
1780 OUTPUT:
1781 RETVAL
1782
1783void
1784_set_state (char *data_)
1785 PROTOTYPE: $
1786 CODE:
1787{
1788 struct io_state *data = (void *)data_;
1789
1790 errno = data->errorno;
1791 PL_laststype = data->laststype;
1792 PL_laststatval = data->laststatval;
1793 PL_statcache = data->statcache;
1794}
1795

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