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Comparing Coro/Coro/State.xs (file contents):
Revision 1.13 by root, Mon Jul 23 22:09:39 2001 UTC vs.
Revision 1.260 by root, Mon Nov 10 04:37:23 2008 UTC

1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
5
1#include "EXTERN.h" 6#include "EXTERN.h"
2#include "perl.h" 7#include "perl.h"
3#include "XSUB.h" 8#include "XSUB.h"
9#include "perliol.h"
4 10
5#include "libcoro/coro.c" 11#include "patchlevel.h"
12
13#include <stdio.h>
14#include <errno.h>
15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp // deep magic, don't ask
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
6 25
7#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
8# include <unistd.h> 27# include <unistd.h>
9# include <sys/mman.h> 28# include <sys/mman.h>
29# ifndef MAP_ANONYMOUS
30# ifdef MAP_ANON
31# define MAP_ANONYMOUS MAP_ANON
32# else
33# undef HAVE_MMAP
34# endif
10#endif 35# endif
36# include <limits.h>
37# ifndef PAGESIZE
38# define PAGESIZE pagesize
39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
40static long pagesize;
41# else
42# define BOOT_PAGESIZE (void)0
43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
11 48
12#define MAY_FLUSH /* increases codesize */ 49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
52#else
53# define REGISTER_STACK(cctx,start,end)
54#endif
13 55
14#define SUB_INIT "Coro::State::initialize" 56/* the maximum number of idle cctx that will be pooled */
57static int cctx_max_idle = 4;
15 58
16#define TRANSFER_SAVE_DEFAV 0x00000001 59#define PERL_VERSION_ATLEAST(a,b,c) \
17#define TRANSFER_SAVE_DEFSV 0x00000002 60 (PERL_REVISION > (a) \
18#define TRANSFER_SAVE_ERRSV 0x00000004 61 || (PERL_REVISION == (a) \
19#define TRANSFER_SAVE_CCTXT 0x00000008 62 && (PERL_VERSION > (b) \
63 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
20 64
21#define TRANSFER_SAVE_ALL -1 65#if !PERL_VERSION_ATLEAST (5,6,0)
66# ifndef PL_ppaddr
67# define PL_ppaddr ppaddr
68# endif
69# ifndef call_sv
70# define call_sv perl_call_sv
71# endif
72# ifndef get_sv
73# define get_sv perl_get_sv
74# endif
75# ifndef get_cv
76# define get_cv perl_get_cv
77# endif
78# ifndef IS_PADGV
79# define IS_PADGV(v) 0
80# endif
81# ifndef IS_PADCONST
82# define IS_PADCONST(v) 0
83# endif
84#endif
22 85
86/* 5.11 */
87#ifndef CxHASARGS
88# define CxHASARGS(cx) (cx)->blk_sub.hasargs
89#endif
90
91/* 5.10.0 */
92#ifndef SvREFCNT_inc_NN
93# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
94#endif
95
96/* 5.8.8 */
97#ifndef GV_NOTQUAL
98# define GV_NOTQUAL 0
99#endif
100#ifndef newSV
101# define newSV(l) NEWSV(0,l)
102#endif
103
104/* 5.8.7 */
105#ifndef SvRV_set
106# define SvRV_set(s,v) SvRV(s) = (v)
107#endif
108
109#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
110# undef CORO_STACKGUARD
111#endif
112
113#ifndef CORO_STACKGUARD
114# define CORO_STACKGUARD 0
115#endif
116
117/* prefer perl internal functions over our own? */
118#ifndef CORO_PREFER_PERL_FUNCTIONS
119# define CORO_PREFER_PERL_FUNCTIONS 0
120#endif
121
122/* The next macros try to return the current stack pointer, in an as
123 * portable way as possible. */
124#define dSTACKLEVEL volatile char stacklevel
125#define STACKLEVEL ((void *)&stacklevel)
126
127#define IN_DESTRUCT (PL_main_cv == Nullcv)
128
129#if __GNUC__ >= 3
130# define attribute(x) __attribute__(x)
131# define BARRIER __asm__ __volatile__ ("" : : : "memory")
132# define expect(expr,value) __builtin_expect ((expr),(value))
133#else
134# define attribute(x)
135# define BARRIER
136# define expect(expr,value) (expr)
137#endif
138
139#define expect_false(expr) expect ((expr) != 0, 0)
140#define expect_true(expr) expect ((expr) != 0, 1)
141
142#define NOINLINE attribute ((noinline))
143
144#include "CoroAPI.h"
145
146#ifdef USE_ITHREADS
147
148static perl_mutex coro_lock;
149# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
150# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
151# if CORO_PTHREAD
152static void *coro_thx;
153# endif
154
155#else
156
157# define LOCK (void)0
158# define UNLOCK (void)0
159
160#endif
161
162# undef LOCK
163# define LOCK (void)0
164# undef UNLOCK
165# define UNLOCK (void)0
166
167/* helper storage struct for Coro::AIO */
168struct io_state
169{
170 AV *res;
171 int errorno;
172 I32 laststype; /* U16 in 5.10.0 */
173 int laststatval;
174 Stat_t statcache;
175};
176
177static double (*nvtime)(); /* so why doesn't it take void? */
178
179static U32 cctx_gen;
180static size_t cctx_stacksize = CORO_STACKSIZE;
181static struct CoroAPI coroapi;
182static AV *main_mainstack; /* used to differentiate between $main and others */
183static JMPENV *main_top_env;
184static HV *coro_state_stash, *coro_stash;
185static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
186static volatile struct coro *transfer_next;
187
188struct transfer_args
189{
190 struct coro *prev, *next;
191};
192
193static GV *irsgv; /* $/ */
194static GV *stdoutgv; /* *STDOUT */
195static SV *rv_diehook;
196static SV *rv_warnhook;
197static HV *hv_sig; /* %SIG */
198
199/* async_pool helper stuff */
200static SV *sv_pool_rss;
201static SV *sv_pool_size;
202static AV *av_async_pool;
203
204/* Coro::AnyEvent */
205static SV *sv_activity;
206
207static struct coro_cctx *cctx_first;
208static int cctx_count, cctx_idle;
209
210enum {
211 CC_MAPPED = 0x01,
212 CC_NOREUSE = 0x02, /* throw this away after tracing */
213 CC_TRACE = 0x04,
214 CC_TRACE_SUB = 0x08, /* trace sub calls */
215 CC_TRACE_LINE = 0x10, /* trace each statement */
216 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
217};
218
219/* this is a structure representing a c-level coroutine */
220typedef struct coro_cctx {
221 struct coro_cctx *next;
222
223 /* the stack */
224 void *sptr;
225 size_t ssize;
226
227 /* cpu state */
228 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
229 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
230 JMPENV *top_env;
231 coro_context cctx;
232
233 U32 gen;
234#if CORO_USE_VALGRIND
235 int valgrind_id;
236#endif
237 unsigned char flags;
238} coro_cctx;
239
240enum {
241 CF_RUNNING = 0x0001, /* coroutine is running */
242 CF_READY = 0x0002, /* coroutine is ready */
243 CF_NEW = 0x0004, /* has never been switched to */
244 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
245};
246
247/* the structure where most of the perl state is stored, overlaid on the cxstack */
248typedef struct {
249 SV *defsv;
250 AV *defav;
251 SV *errsv;
252 SV *irsgv;
253#define VAR(name,type) type name;
254# include "state.h"
255#undef VAR
256} perl_slots;
257
258#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
259
260/* this is a structure representing a perl-level coroutine */
23struct coro { 261struct coro {
24 /* the optional C context */ 262 /* the c coroutine allocated to this perl coroutine, if any */
25 coro_context cctx; 263 coro_cctx *cctx;
26 void *sptr;
27 long ssize;
28 264
29 /* optionally saved, might be zero */ 265 /* process data */
30 AV *defav;
31 SV *defsv;
32 SV *errsv;
33
34 /* saved global state not related to stacks */
35 U8 dowarn;
36
37 /* the stacks and related info (callchain etc..) */
38 PERL_SI *curstackinfo;
39 AV *curstack;
40 AV *mainstack; 266 AV *mainstack;
41 SV **stack_sp; 267 perl_slots *slot; /* basically the saved sp */
42 OP *op;
43 SV **curpad;
44 SV **stack_base;
45 SV **stack_max;
46 SV **tmps_stack;
47 I32 tmps_floor;
48 I32 tmps_ix;
49 I32 tmps_max;
50 I32 *markstack;
51 I32 *markstack_ptr;
52 I32 *markstack_max;
53 I32 *scopestack;
54 I32 scopestack_ix;
55 I32 scopestack_max;
56 ANY *savestack;
57 I32 savestack_ix;
58 I32 savestack_max;
59 OP **retstack;
60 I32 retstack_ix;
61 I32 retstack_max;
62 COP *curcop;
63 JMPENV start_env;
64 JMPENV *top_env;
65 268
66 /* data associated with this coroutine (initial args) */ 269 AV *args; /* data associated with this coroutine (initial args) */
67 AV *args; 270 int refcnt; /* coroutines are refcounted, yes */
271 int flags; /* CF_ flags */
272 HV *hv; /* the perl hash associated with this coro, if any */
273
274 /* statistics */
275 int usecount; /* number of transfers to this coro */
276
277 /* coro process data */
278 int prio;
279 SV *throw; /* exception to be thrown */
280
281 /* async_pool */
282 SV *saved_deffh;
283
284 /* linked list */
285 struct coro *next, *prev;
68}; 286};
69 287
70typedef struct coro *Coro__State; 288typedef struct coro *Coro__State;
71typedef struct coro *Coro__State_or_hashref; 289typedef struct coro *Coro__State_or_hashref;
72 290
73static AV *main_mainstack; /* used to differentiate between $main and others */ 291/** Coro ********************************************************************/
74static HV *coro_state_stash;
75static HV *padlist_cache;
76 292
77/* mostly copied from op.c:cv_clone2 */ 293#define PRIO_MAX 3
78STATIC AV * 294#define PRIO_HIGH 1
79clone_padlist (AV *protopadlist) 295#define PRIO_NORMAL 0
296#define PRIO_LOW -1
297#define PRIO_IDLE -3
298#define PRIO_MIN -4
299
300/* for Coro.pm */
301static SV *coro_current;
302static SV *coro_readyhook;
303static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
304static int coro_nready;
305static struct coro *coro_first;
306
307/** lowlevel stuff **********************************************************/
308
309static SV *
310coro_get_sv (pTHX_ const char *name, int create)
80{ 311{
81 AV *av; 312#if PERL_VERSION_ATLEAST (5,10,0)
82 I32 ix; 313 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
83 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 314 get_sv (name, create);
84 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 315#endif
85 SV **pname = AvARRAY (protopad_name); 316 return get_sv (name, create);
86 SV **ppad = AvARRAY (protopad); 317}
87 I32 fname = AvFILLp (protopad_name); 318
88 I32 fpad = AvFILLp (protopad); 319static AV *
320coro_get_av (pTHX_ const char *name, int create)
321{
322#if PERL_VERSION_ATLEAST (5,10,0)
323 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
324 get_av (name, create);
325#endif
326 return get_av (name, create);
327}
328
329static HV *
330coro_get_hv (pTHX_ const char *name, int create)
331{
332#if PERL_VERSION_ATLEAST (5,10,0)
333 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
334 get_hv (name, create);
335#endif
336 return get_hv (name, create);
337}
338
339static AV *
340coro_clone_padlist (pTHX_ CV *cv)
341{
342 AV *padlist = CvPADLIST (cv);
89 AV *newpadlist, *newpad_name, *newpad; 343 AV *newpadlist, *newpad;
90 SV **npad;
91
92 newpad_name = newAV ();
93 for (ix = fname; ix >= 0; ix--)
94 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
95
96 newpad = newAV ();
97 av_fill (newpad, AvFILLp (protopad));
98 npad = AvARRAY (newpad);
99 344
100 newpadlist = newAV (); 345 newpadlist = newAV ();
101 AvREAL_off (newpadlist); 346 AvREAL_off (newpadlist);
102 av_store (newpadlist, 0, (SV *) newpad_name); 347#if PERL_VERSION_ATLEAST (5,10,0)
348 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
349#else
350 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
351#endif
352 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
353 --AvFILLp (padlist);
354
355 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
103 av_store (newpadlist, 1, (SV *) newpad); 356 av_store (newpadlist, 1, (SV *)newpad);
104 357
105 av = newAV (); /* will be @_ */ 358 return newpadlist;
106 av_extend (av, 0); 359}
107 av_store (newpad, 0, (SV *) av);
108 AvFLAGS (av) = AVf_REIFY;
109 360
110 for (ix = fpad; ix > 0; ix--) 361static void
362free_padlist (pTHX_ AV *padlist)
363{
364 /* may be during global destruction */
365 if (SvREFCNT (padlist))
111 { 366 {
112 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 367 I32 i = AvFILLp (padlist);
113 if (namesv && namesv != &PL_sv_undef) 368 while (i >= 0)
114 { 369 {
115 char *name = SvPVX (namesv); /* XXX */ 370 SV **svp = av_fetch (padlist, i--, FALSE);
116 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 371 if (svp)
117 { /* lexical from outside? */
118 npad[ix] = SvREFCNT_inc (ppad[ix]);
119 } 372 {
120 else
121 { /* our own lexical */
122 SV *sv; 373 SV *sv;
123 if (*name == '&') 374 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
124 sv = SvREFCNT_inc (ppad[ix]); 375 SvREFCNT_dec (sv);
125 else if (*name == '@') 376
126 sv = (SV *) newAV (); 377 SvREFCNT_dec (*svp);
127 else if (*name == '%')
128 sv = (SV *) newHV ();
129 else
130 sv = NEWSV (0, 0);
131 if (!SvPADBUSY (sv))
132 SvPADMY_on (sv);
133 npad[ix] = sv;
134 } 378 }
135 } 379 }
136 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
137 {
138 npad[ix] = SvREFCNT_inc (ppad[ix]);
139 }
140 else
141 {
142 SV *sv = NEWSV (0, 0);
143 SvPADTMP_on (sv);
144 npad[ix] = sv;
145 }
146 }
147 380
148#if 0 /* return -ENOTUNDERSTOOD */
149 /* Now that vars are all in place, clone nested closures. */
150
151 for (ix = fpad; ix > 0; ix--) {
152 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
153 if (namesv
154 && namesv != &PL_sv_undef
155 && !(SvFLAGS(namesv) & SVf_FAKE)
156 && *SvPVX(namesv) == '&'
157 && CvCLONE(ppad[ix]))
158 {
159 CV *kid = cv_clone((CV*)ppad[ix]);
160 SvREFCNT_dec(ppad[ix]);
161 CvCLONE_on(kid);
162 SvPADMY_on(kid);
163 npad[ix] = (SV*)kid;
164 }
165 }
166#endif
167
168 return newpadlist;
169}
170
171#ifdef MAY_FLUSH
172STATIC AV *
173free_padlist (AV *padlist)
174{
175 /* may be during global destruction */
176 if (SvREFCNT(padlist))
177 {
178 I32 i = AvFILLp(padlist);
179 while (i >= 0)
180 {
181 SV **svp = av_fetch(padlist, i--, FALSE);
182 SV *sv = svp ? *svp : Nullsv;
183 if (sv)
184 SvREFCNT_dec(sv);
185 }
186
187 SvREFCNT_dec((SV*)padlist); 381 SvREFCNT_dec ((SV*)padlist);
188 } 382 }
189} 383}
190#endif 384
385static int
386coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
387{
388 AV *padlist;
389 AV *av = (AV *)mg->mg_obj;
390
391 /* casting is fun. */
392 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
393 free_padlist (aTHX_ padlist);
394
395 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
396
397 return 0;
398}
399
400#define CORO_MAGIC_type_cv PERL_MAGIC_ext
401#define CORO_MAGIC_type_state PERL_MAGIC_ext
402
403static MGVTBL coro_cv_vtbl = {
404 0, 0, 0, 0,
405 coro_cv_free
406};
407
408#define CORO_MAGIC(sv, type) \
409 SvMAGIC (sv) \
410 ? SvMAGIC (sv)->mg_type == type \
411 ? SvMAGIC (sv) \
412 : mg_find (sv, type) \
413 : 0
414
415#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
416#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
417
418static struct coro *
419SvSTATE_ (pTHX_ SV *coro)
420{
421 HV *stash;
422 MAGIC *mg;
423
424 if (SvROK (coro))
425 coro = SvRV (coro);
426
427 if (expect_false (SvTYPE (coro) != SVt_PVHV))
428 croak ("Coro::State object required");
429
430 stash = SvSTASH (coro);
431 if (expect_false (stash != coro_stash && stash != coro_state_stash))
432 {
433 /* very slow, but rare, check */
434 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
435 croak ("Coro::State object required");
436 }
437
438 mg = CORO_MAGIC_state (coro);
439 return (struct coro *)mg->mg_ptr;
440}
441
442#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
191 443
192/* the next two functions merely cache the padlists */ 444/* the next two functions merely cache the padlists */
193STATIC void 445static void
194get_padlist (CV *cv) 446get_padlist (pTHX_ CV *cv)
195{ 447{
196 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0); 448 MAGIC *mg = CORO_MAGIC_cv (cv);
449 AV *av;
197 450
198 if (he && AvFILLp ((AV *)*he) >= 0) 451 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
199 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he); 452 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
200 else 453 else
201 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
202}
203
204STATIC void
205put_padlist (CV *cv)
206{
207 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
208
209 if (SvTYPE (*he) != SVt_PVAV)
210 { 454 {
455#if CORO_PREFER_PERL_FUNCTIONS
456 /* this is probably cleaner? but also slower! */
457 /* in practise, it seems to be less stable */
458 CV *cp = Perl_cv_clone (cv);
459 CvPADLIST (cv) = CvPADLIST (cp);
460 CvPADLIST (cp) = 0;
211 SvREFCNT_dec (*he); 461 SvREFCNT_dec (cp);
212 *he = (SV *)newAV (); 462#else
463 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
464#endif
213 } 465 }
214
215 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
216} 466}
217
218#ifdef MAY_FLUSH
219STATIC void
220flush_padlist_cache ()
221{
222 HV *hv = padlist_cache;
223 padlist_cache = newHV ();
224
225 if (hv_iterinit (hv))
226 {
227 HE *he;
228 AV *padlist;
229
230 while (!!(he = hv_iternext (hv)))
231 {
232 AV *av = (AV *)HeVAL(he);
233
234 /* casting is fun. */
235 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
236 free_padlist (padlist);
237 }
238 }
239
240 SvREFCNT_dec (hv);
241}
242#endif
243
244#define SB do {
245#define SE } while (0)
246
247#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE
248#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE
249
250#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
251 467
252static void 468static void
469put_padlist (pTHX_ CV *cv)
470{
471 MAGIC *mg = CORO_MAGIC_cv (cv);
472 AV *av;
473
474 if (expect_false (!mg))
475 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
476
477 av = (AV *)mg->mg_obj;
478
479 if (expect_false (AvFILLp (av) >= AvMAX (av)))
480 av_extend (av, AvMAX (av) + 1);
481
482 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
483}
484
485/** load & save, init *******************************************************/
486
487static void
253load_state(pTHX_ Coro__State c) 488load_perl (pTHX_ Coro__State c)
254{ 489{
255 PL_dowarn = c->dowarn; 490 perl_slots *slot = c->slot;
491 c->slot = 0;
256 492
257 PL_curstackinfo = c->curstackinfo;
258 PL_curstack = c->curstack;
259 PL_mainstack = c->mainstack; 493 PL_mainstack = c->mainstack;
260 PL_stack_sp = c->stack_sp;
261 PL_op = c->op;
262 PL_curpad = c->curpad;
263 PL_stack_base = c->stack_base;
264 PL_stack_max = c->stack_max;
265 PL_tmps_stack = c->tmps_stack;
266 PL_tmps_floor = c->tmps_floor;
267 PL_tmps_ix = c->tmps_ix;
268 PL_tmps_max = c->tmps_max;
269 PL_markstack = c->markstack;
270 PL_markstack_ptr = c->markstack_ptr;
271 PL_markstack_max = c->markstack_max;
272 PL_scopestack = c->scopestack;
273 PL_scopestack_ix = c->scopestack_ix;
274 PL_scopestack_max = c->scopestack_max;
275 PL_savestack = c->savestack;
276 PL_savestack_ix = c->savestack_ix;
277 PL_savestack_max = c->savestack_max;
278 PL_retstack = c->retstack;
279 PL_retstack_ix = c->retstack_ix;
280 PL_retstack_max = c->retstack_max;
281 PL_curcop = c->curcop;
282 PL_start_env = c->start_env;
283 PL_top_env = c->top_env;
284 494
285 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 495 GvSV (PL_defgv) = slot->defsv;
286 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 496 GvAV (PL_defgv) = slot->defav;
287 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 497 GvSV (PL_errgv) = slot->errsv;
498 GvSV (irsgv) = slot->irsgv;
499
500 #define VAR(name,type) PL_ ## name = slot->name;
501 # include "state.h"
502 #undef VAR
288 503
289 { 504 {
290 dSP; 505 dSP;
506
291 CV *cv; 507 CV *cv;
292 508
293 /* now do the ugly restore mess */ 509 /* now do the ugly restore mess */
294 while ((cv = (CV *)POPs)) 510 while (expect_true (cv = (CV *)POPs))
295 { 511 {
296 AV *padlist = (AV *)POPs;
297
298 if (padlist)
299 {
300 put_padlist (cv); /* mark this padlist as available */ 512 put_padlist (aTHX_ cv); /* mark this padlist as available */
301 CvPADLIST(cv) = padlist; 513 CvDEPTH (cv) = PTR2IV (POPs);
302#ifdef USE_THREADS 514 CvPADLIST (cv) = (AV *)POPs;
303 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
304#endif
305 }
306
307 ++CvDEPTH(cv);
308 } 515 }
309 516
310 PUTBACK; 517 PUTBACK;
311 } 518 }
312} 519}
313 520
314static void 521static void
315save_state(pTHX_ Coro__State c, int flags) 522save_perl (pTHX_ Coro__State c)
316{ 523{
317 { 524 {
318 dSP; 525 dSP;
319 I32 cxix = cxstack_ix; 526 I32 cxix = cxstack_ix;
320 PERL_CONTEXT *ccstk = cxstack; 527 PERL_CONTEXT *ccstk = cxstack;
… …
323 /* 530 /*
324 * the worst thing you can imagine happens first - we have to save 531 * the worst thing you can imagine happens first - we have to save
325 * (and reinitialize) all cv's in the whole callchain :( 532 * (and reinitialize) all cv's in the whole callchain :(
326 */ 533 */
327 534
328 PUSHs (Nullsv); 535 XPUSHs (Nullsv);
329 /* this loop was inspired by pp_caller */ 536 /* this loop was inspired by pp_caller */
330 for (;;) 537 for (;;)
331 { 538 {
332 do 539 while (expect_true (cxix >= 0))
333 { 540 {
334 PERL_CONTEXT *cx = &ccstk[cxix--]; 541 PERL_CONTEXT *cx = &ccstk[cxix--];
335 542
336 if (CxTYPE(cx) == CXt_SUB) 543 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
337 { 544 {
338 CV *cv = cx->blk_sub.cv; 545 CV *cv = cx->blk_sub.cv;
546
339 if (CvDEPTH(cv)) 547 if (expect_true (CvDEPTH (cv)))
340 { 548 {
341#ifdef USE_THREADS
342 /*XPUSHs ((SV *)CvOWNER(cv));*/
343 /*CvOWNER(cv) = 0;*/
344 /*error must unlock this cv etc.. etc...*/
345#endif
346 EXTEND (SP, CvDEPTH(cv)*2); 549 EXTEND (SP, 3);
347
348 while (--CvDEPTH(cv))
349 {
350 /* this tells the restore code to increment CvDEPTH */
351 PUSHs (Nullsv);
352 PUSHs ((SV *)cv);
353 }
354
355 PUSHs ((SV *)CvPADLIST(cv)); 550 PUSHs ((SV *)CvPADLIST (cv));
551 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
356 PUSHs ((SV *)cv); 552 PUSHs ((SV *)cv);
357 553
358 get_padlist (cv); /* this is a monster */ 554 CvDEPTH (cv) = 0;
555 get_padlist (aTHX_ cv);
359 } 556 }
360 } 557 }
361 else if (CxTYPE(cx) == CXt_FORMAT)
362 {
363 /* I never used formats, so how should I know how these are implemented? */
364 /* my bold guess is as a simple, plain sub... */
365 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
366 }
367 } 558 }
368 while (cxix >= 0);
369 559
370 if (top_si->si_type == PERLSI_MAIN) 560 if (expect_true (top_si->si_type == PERLSI_MAIN))
371 break; 561 break;
372 562
373 top_si = top_si->si_prev; 563 top_si = top_si->si_prev;
374 ccstk = top_si->si_cxstack; 564 ccstk = top_si->si_cxstack;
375 cxix = top_si->si_cxix; 565 cxix = top_si->si_cxix;
376 } 566 }
377 567
378 PUTBACK; 568 PUTBACK;
379 } 569 }
380 570
381 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 571 /* allocate some space on the context stack for our purposes */
382 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 572 /* we manually unroll here, as usually 2 slots is enough */
383 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 573 if (SLOT_COUNT >= 1) CXINC;
574 if (SLOT_COUNT >= 2) CXINC;
575 if (SLOT_COUNT >= 3) CXINC;
576 {
577 int i;
578 for (i = 3; i < SLOT_COUNT; ++i)
579 CXINC;
580 }
581 cxstack_ix -= SLOT_COUNT; /* undo allocation */
384 582
385 /* I have not the slightest idea of why av_reify is necessary */
386 /* but if it's missing the defav contents magically get replaced sometimes */
387 if (c->defav)
388 av_reify (c->defav);
389
390 c->dowarn = PL_dowarn;
391
392 c->curstackinfo = PL_curstackinfo;
393 c->curstack = PL_curstack;
394 c->mainstack = PL_mainstack; 583 c->mainstack = PL_mainstack;
395 c->stack_sp = PL_stack_sp; 584
396 c->op = PL_op; 585 {
397 c->curpad = PL_curpad; 586 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
398 c->stack_base = PL_stack_base; 587
399 c->stack_max = PL_stack_max; 588 slot->defav = GvAV (PL_defgv);
400 c->tmps_stack = PL_tmps_stack; 589 slot->defsv = DEFSV;
401 c->tmps_floor = PL_tmps_floor; 590 slot->errsv = ERRSV;
402 c->tmps_ix = PL_tmps_ix; 591 slot->irsgv = GvSV (irsgv);
403 c->tmps_max = PL_tmps_max; 592
404 c->markstack = PL_markstack; 593 #define VAR(name,type) slot->name = PL_ ## name;
405 c->markstack_ptr = PL_markstack_ptr; 594 # include "state.h"
406 c->markstack_max = PL_markstack_max; 595 #undef VAR
407 c->scopestack = PL_scopestack; 596 }
408 c->scopestack_ix = PL_scopestack_ix;
409 c->scopestack_max = PL_scopestack_max;
410 c->savestack = PL_savestack;
411 c->savestack_ix = PL_savestack_ix;
412 c->savestack_max = PL_savestack_max;
413 c->retstack = PL_retstack;
414 c->retstack_ix = PL_retstack_ix;
415 c->retstack_max = PL_retstack_max;
416 c->curcop = PL_curcop;
417 c->start_env = PL_start_env;
418 c->top_env = PL_top_env;
419} 597}
420 598
421/* 599/*
422 * allocate various perl stacks. This is an exact copy 600 * allocate various perl stacks. This is an exact copy
423 * of perl.c:init_stacks, except that it uses less memory 601 * of perl.c:init_stacks, except that it uses less memory
424 * on the assumption that coroutines do not usually need 602 * on the (sometimes correct) assumption that coroutines do
425 * a lot of stackspace. 603 * not usually need a lot of stackspace.
426 */ 604 */
427STATIC void 605#if CORO_PREFER_PERL_FUNCTIONS
606# define coro_init_stacks init_stacks
607#else
608static void
428coro_init_stacks (pTHX) 609coro_init_stacks (pTHX)
429{ 610{
430 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 611 PL_curstackinfo = new_stackinfo(32, 8);
431 PL_curstackinfo->si_type = PERLSI_MAIN; 612 PL_curstackinfo->si_type = PERLSI_MAIN;
432 PL_curstack = PL_curstackinfo->si_stack; 613 PL_curstack = PL_curstackinfo->si_stack;
433 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 614 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
434 615
435 PL_stack_base = AvARRAY(PL_curstack); 616 PL_stack_base = AvARRAY(PL_curstack);
436 PL_stack_sp = PL_stack_base; 617 PL_stack_sp = PL_stack_base;
437 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 618 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
438 619
439 New(50,PL_tmps_stack,64,SV*); 620 New(50,PL_tmps_stack,32,SV*);
440 PL_tmps_floor = -1; 621 PL_tmps_floor = -1;
441 PL_tmps_ix = -1; 622 PL_tmps_ix = -1;
442 PL_tmps_max = 64; 623 PL_tmps_max = 32;
443 624
444 New(54,PL_markstack,12,I32); 625 New(54,PL_markstack,16,I32);
445 PL_markstack_ptr = PL_markstack; 626 PL_markstack_ptr = PL_markstack;
446 PL_markstack_max = PL_markstack + 12; 627 PL_markstack_max = PL_markstack + 16;
447 628
629#ifdef SET_MARK_OFFSET
448 SET_MARK_OFFSET; 630 SET_MARK_OFFSET;
631#endif
449 632
450 New(54,PL_scopestack,12,I32); 633 New(54,PL_scopestack,8,I32);
451 PL_scopestack_ix = 0; 634 PL_scopestack_ix = 0;
452 PL_scopestack_max = 12; 635 PL_scopestack_max = 8;
453 636
454 New(54,PL_savestack,64,ANY); 637 New(54,PL_savestack,24,ANY);
455 PL_savestack_ix = 0; 638 PL_savestack_ix = 0;
456 PL_savestack_max = 64; 639 PL_savestack_max = 24;
457 640
641#if !PERL_VERSION_ATLEAST (5,10,0)
458 New(54,PL_retstack,8,OP*); 642 New(54,PL_retstack,4,OP*);
459 PL_retstack_ix = 0; 643 PL_retstack_ix = 0;
460 PL_retstack_max = 8; 644 PL_retstack_max = 4;
645#endif
461} 646}
647#endif
462 648
463/* 649/*
464 * destroy the stacks, the callchain etc... 650 * destroy the stacks, the callchain etc...
465 * still there is a memleak of 128 bytes...
466 */ 651 */
467STATIC void 652static void
468destroy_stacks(pTHX) 653coro_destruct_stacks (pTHX)
469{ 654{
470 /* is this ugly, I ask? */
471 while (PL_scopestack_ix)
472 LEAVE;
473
474 /* sure it is, but more important: is it correct?? :/ */
475 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
476 FREETMPS;
477
478 while (PL_curstackinfo->si_next) 655 while (PL_curstackinfo->si_next)
479 PL_curstackinfo = PL_curstackinfo->si_next; 656 PL_curstackinfo = PL_curstackinfo->si_next;
480 657
481 while (PL_curstackinfo) 658 while (PL_curstackinfo)
482 { 659 {
483 PERL_SI *p = PL_curstackinfo->si_prev; 660 PERL_SI *p = PL_curstackinfo->si_prev;
484 661
485 { 662 if (!IN_DESTRUCT)
486 dSP;
487 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
488 PUTBACK; /* possibly superfluous */
489 }
490
491 dounwind(-1);
492
493 SvREFCNT_dec(PL_curstackinfo->si_stack); 663 SvREFCNT_dec (PL_curstackinfo->si_stack);
664
494 Safefree(PL_curstackinfo->si_cxstack); 665 Safefree (PL_curstackinfo->si_cxstack);
495 Safefree(PL_curstackinfo); 666 Safefree (PL_curstackinfo);
496 PL_curstackinfo = p; 667 PL_curstackinfo = p;
497 } 668 }
498 669
499 Safefree(PL_tmps_stack); 670 Safefree (PL_tmps_stack);
500 Safefree(PL_markstack); 671 Safefree (PL_markstack);
501 Safefree(PL_scopestack); 672 Safefree (PL_scopestack);
502 Safefree(PL_savestack); 673 Safefree (PL_savestack);
674#if !PERL_VERSION_ATLEAST (5,10,0)
503 Safefree(PL_retstack); 675 Safefree (PL_retstack);
676#endif
677}
678
679static size_t
680coro_rss (pTHX_ struct coro *coro)
681{
682 size_t rss = sizeof (*coro);
683
684 if (coro->mainstack)
685 {
686 perl_slots tmp_slot;
687 perl_slots *slot;
688
689 if (coro->flags & CF_RUNNING)
690 {
691 slot = &tmp_slot;
692
693 #define VAR(name,type) slot->name = PL_ ## name;
694 # include "state.h"
695 #undef VAR
696 }
697 else
698 slot = coro->slot;
699
700 if (slot)
701 {
702 rss += sizeof (slot->curstackinfo);
703 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
704 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
705 rss += slot->tmps_max * sizeof (SV *);
706 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
707 rss += slot->scopestack_max * sizeof (I32);
708 rss += slot->savestack_max * sizeof (ANY);
709
710#if !PERL_VERSION_ATLEAST (5,10,0)
711 rss += slot->retstack_max * sizeof (OP *);
712#endif
713 }
714 }
715
716 return rss;
717}
718
719/** coroutine stack handling ************************************************/
720
721static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
722static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
723static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
724
725/* apparently < 5.8.8 */
726#ifndef MgPV_nolen_const
727#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
728 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
729 (const char*)(mg)->mg_ptr)
730#endif
731
732/*
733 * This overrides the default magic get method of %SIG elements.
734 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
735 * and instead of tryign to save and restore the hash elements, we just provide
736 * readback here.
737 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
738 * not expecting this to actually change the hook. This is a potential problem
739 * when a schedule happens then, but we ignore this.
740 */
741static int
742coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
743{
744 const char *s = MgPV_nolen_const (mg);
745
746 if (*s == '_')
747 {
748 SV **svp = 0;
749
750 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
751 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
752
753 if (svp)
754 {
755 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
756 return 0;
757 }
758 }
759
760 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
761}
762
763static int
764coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
765{
766 const char *s = MgPV_nolen_const (mg);
767
768 if (*s == '_')
769 {
770 SV **svp = 0;
771
772 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
773 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
774
775 if (svp)
776 {
777 SV *old = *svp;
778 *svp = 0;
779 SvREFCNT_dec (old);
780 return 0;
781 }
782 }
783
784 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
785}
786
787static int
788coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
789{
790 const char *s = MgPV_nolen_const (mg);
791
792 if (*s == '_')
793 {
794 SV **svp = 0;
795
796 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
797 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
798
799 if (svp)
800 {
801 SV *old = *svp;
802 *svp = newSVsv (sv);
803 SvREFCNT_dec (old);
804 return 0;
805 }
806 }
807
808 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
504} 809}
505 810
506static void 811static void
507allocate_stack (Coro__State ctx) 812coro_setup (pTHX_ struct coro *coro)
508{
509#ifdef HAVE_MMAP
510 ctx->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-use */
511 ctx->sptr = mmap (0, ctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
512 if (ctx->sptr == (void *)-1)
513#endif
514 {
515 /*FIXME*//*D*//* reasonable stack size! */
516 ctx->ssize = 4096 * sizeof (long);
517 New (0, ctx->sptr, 4096, long);
518 }
519}
520
521static void
522deallocate_stack (Coro__State ctx)
523{
524#ifdef HAVE_MMAP
525 munmap (ctx->sptr, ctx->ssize);
526#else
527 Safefree (ctx->sptr);
528#endif
529}
530
531/* might go away together with optional SAVE_CCTXT */
532static void
533setup_coro (void *arg)
534{ 813{
535 /* 814 /*
536 * emulate part of the perl startup here. 815 * emulate part of the perl startup here.
537 */ 816 */
817 coro_init_stacks (aTHX);
818
819 PL_runops = RUNOPS_DEFAULT;
820 PL_curcop = &PL_compiling;
821 PL_in_eval = EVAL_NULL;
822 PL_comppad = 0;
823 PL_curpm = 0;
824 PL_curpad = 0;
825 PL_localizing = 0;
826 PL_dirty = 0;
827 PL_restartop = 0;
828#if PERL_VERSION_ATLEAST (5,10,0)
829 PL_parser = 0;
830#endif
831
832 /* recreate the die/warn hooks */
833 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
834 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
835
836 GvSV (PL_defgv) = newSV (0);
837 GvAV (PL_defgv) = coro->args; coro->args = 0;
838 GvSV (PL_errgv) = newSV (0);
839 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
840 PL_rs = newSVsv (GvSV (irsgv));
841 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
842
843 {
844 dSP;
845 UNOP myop;
846
847 Zero (&myop, 1, UNOP);
848 myop.op_next = Nullop;
849 myop.op_flags = OPf_WANT_VOID;
850
851 PUSHMARK (SP);
852 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
853 PUTBACK;
854 PL_op = (OP *)&myop;
855 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
856 SPAGAIN;
857 }
858
859 /* this newly created coroutine might be run on an existing cctx which most
860 * likely was suspended in set_stacklevel, called from entersub.
861 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
862 * so we ENTER here for symmetry.
863 */
864 ENTER;
865}
866
867static void
868coro_destruct (pTHX_ struct coro *coro)
869{
870 if (!IN_DESTRUCT)
871 {
872 /* restore all saved variables and stuff */
873 LEAVE_SCOPE (0);
874 assert (PL_tmps_floor == -1);
875
876 /* free all temporaries */
877 FREETMPS;
878 assert (PL_tmps_ix == -1);
879
880 /* unwind all extra stacks */
881 POPSTACK_TO (PL_mainstack);
882
883 /* unwind main stack */
884 dounwind (-1);
885 }
886
887 SvREFCNT_dec (GvSV (PL_defgv));
888 SvREFCNT_dec (GvAV (PL_defgv));
889 SvREFCNT_dec (GvSV (PL_errgv));
890 SvREFCNT_dec (PL_defoutgv);
891 SvREFCNT_dec (PL_rs);
892 SvREFCNT_dec (GvSV (irsgv));
893
894 SvREFCNT_dec (PL_diehook);
895 SvREFCNT_dec (PL_warnhook);
896
897 SvREFCNT_dec (coro->saved_deffh);
898 SvREFCNT_dec (coro->throw);
899
900 coro_destruct_stacks (aTHX);
901}
902
903static void
904free_coro_mortal (pTHX)
905{
906 if (expect_true (coro_mortal))
907 {
908 SvREFCNT_dec (coro_mortal);
909 coro_mortal = 0;
910 }
911}
912
913static int
914runops_trace (pTHX)
915{
916 COP *oldcop = 0;
917 int oldcxix = -2;
918 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
919 coro_cctx *cctx = coro->cctx;
920
921 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
922 {
923 PERL_ASYNC_CHECK ();
924
925 if (cctx->flags & CC_TRACE_ALL)
926 {
927 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
928 {
929 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
930 SV **bot, **top;
931 AV *av = newAV (); /* return values */
932 SV **cb;
933 dSP;
934
935 GV *gv = CvGV (cx->blk_sub.cv);
936 SV *fullname = sv_2mortal (newSV (0));
937 if (isGV (gv))
938 gv_efullname3 (fullname, gv, 0);
939
940 bot = PL_stack_base + cx->blk_oldsp + 1;
941 top = cx->blk_gimme == G_ARRAY ? SP + 1
942 : cx->blk_gimme == G_SCALAR ? bot + 1
943 : bot;
944
945 av_extend (av, top - bot);
946 while (bot < top)
947 av_push (av, SvREFCNT_inc_NN (*bot++));
948
949 PL_runops = RUNOPS_DEFAULT;
950 ENTER;
951 SAVETMPS;
952 EXTEND (SP, 3);
953 PUSHMARK (SP);
954 PUSHs (&PL_sv_no);
955 PUSHs (fullname);
956 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
957 PUTBACK;
958 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
959 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
960 SPAGAIN;
961 FREETMPS;
962 LEAVE;
963 PL_runops = runops_trace;
964 }
965
966 if (oldcop != PL_curcop)
967 {
968 oldcop = PL_curcop;
969
970 if (PL_curcop != &PL_compiling)
971 {
972 SV **cb;
973
974 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
975 {
976 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
977
978 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
979 {
980 runops_proc_t old_runops = PL_runops;
981 dSP;
982 GV *gv = CvGV (cx->blk_sub.cv);
983 SV *fullname = sv_2mortal (newSV (0));
984
985 if (isGV (gv))
986 gv_efullname3 (fullname, gv, 0);
987
988 PL_runops = RUNOPS_DEFAULT;
989 ENTER;
990 SAVETMPS;
991 EXTEND (SP, 3);
992 PUSHMARK (SP);
993 PUSHs (&PL_sv_yes);
994 PUSHs (fullname);
995 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
996 PUTBACK;
997 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
998 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
999 SPAGAIN;
1000 FREETMPS;
1001 LEAVE;
1002 PL_runops = runops_trace;
1003 }
1004
1005 oldcxix = cxstack_ix;
1006 }
1007
1008 if (cctx->flags & CC_TRACE_LINE)
1009 {
1010 dSP;
1011
1012 PL_runops = RUNOPS_DEFAULT;
1013 ENTER;
1014 SAVETMPS;
1015 EXTEND (SP, 3);
1016 PL_runops = RUNOPS_DEFAULT;
1017 PUSHMARK (SP);
1018 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1019 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1020 PUTBACK;
1021 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1022 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1023 SPAGAIN;
1024 FREETMPS;
1025 LEAVE;
1026 PL_runops = runops_trace;
1027 }
1028 }
1029 }
1030 }
1031 }
1032
1033 TAINT_NOT;
1034 return 0;
1035}
1036
1037static void
1038prepare_set_stacklevel (struct transfer_args *ta, struct coro_cctx *cctx)
1039{
1040 ta->prev = (struct coro *)cctx;
1041 ta->next = 0;
1042}
1043
1044/* inject a fake call to Coro::State::_cctx_init into the execution */
1045/* _cctx_init should be careful, as it could be called at almost any time */
1046/* during execution of a perl program */
1047/* also initialises PL_top_env */
1048static void NOINLINE
1049cctx_prepare (pTHX_ coro_cctx *cctx)
1050{
538 dSP; 1051 dSP;
539 Coro__State ctx = (Coro__State)arg; 1052 UNOP myop;
540 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
541 1053
542 coro_init_stacks (aTHX); 1054 PL_top_env = &PL_start_env;
543 JMPENV_BOOTSTRAP; 1055
1056 if (cctx->flags & CC_TRACE)
1057 PL_runops = runops_trace;
1058
1059 Zero (&myop, 1, UNOP);
1060 myop.op_next = PL_op;
1061 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1062
1063 PUSHMARK (SP);
1064 EXTEND (SP, 2);
1065 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1066 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1067 PUTBACK;
1068 PL_op = (OP *)&myop;
1069 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
544 SPAGAIN; 1070 SPAGAIN;
1071}
545 1072
546 /*PL_curcop = 0;*/ 1073/* the tail of transfer: execute stuff we can onyl do afetr a transfer */
547 SvREFCNT_dec (GvAV (PL_defgv)); 1074static void
548 GvAV (PL_defgv) = ctx->args; 1075transfer_tail (void)
1076{
1077 struct coro *next = (struct coro *)transfer_next;
1078 transfer_next = 0; //D for temporary assertion in transfer
1079 assert (("FATAL ERROR: internal error 1067 in Coro module, please report", next));//D
549 1080
1081 free_coro_mortal (aTHX);
1082 UNLOCK;
1083
1084 if (expect_false (next->throw))
1085 {
1086 SV *exception = sv_2mortal (next->throw);
1087
1088 next->throw = 0;
1089 sv_setsv (ERRSV, exception);
1090 croak (0);
1091 }
1092}
1093
1094/*
1095 * this is a _very_ stripped down perl interpreter ;)
1096 */
1097static void
1098cctx_run (void *arg)
1099{
1100#ifdef USE_ITHREADS
1101# if CORO_PTHREAD
1102 PERL_SET_CONTEXT (coro_thx);
1103# endif
1104#endif
1105 {
1106 dTHX;
1107
1108 /* entersub called ENTER, but we never 'returned', undo that here */
1109 LEAVE;
1110
1111 /* we now skip the entersub that did lead to transfer() */
1112 PL_op = PL_op->op_next;
1113
1114 /* inject a fake subroutine call to cctx_init */
1115 cctx_prepare (aTHX_ (coro_cctx *)arg);
1116
1117 /* cctx_run is the alternative tail of transfer() */
1118 transfer_tail ();
1119
1120 /* somebody or something will hit me for both perl_run and PL_restartop */
1121 PL_restartop = PL_op;
1122 perl_run (PL_curinterp);
1123
1124 /*
1125 * If perl-run returns we assume exit() was being called or the coro
1126 * fell off the end, which seems to be the only valid (non-bug)
1127 * reason for perl_run to return. We try to exit by jumping to the
1128 * bootstrap-time "top" top_env, as we cannot restore the "main"
1129 * coroutine as Coro has no such concept
1130 */
1131 PL_top_env = main_top_env;
1132 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1133 }
1134}
1135
1136static coro_cctx *
1137cctx_new ()
1138{
1139 coro_cctx *cctx;
1140
1141 ++cctx_count;
1142 New (0, cctx, 1, coro_cctx);
1143
1144 cctx->gen = cctx_gen;
1145 cctx->flags = 0;
1146 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1147
1148 return cctx;
1149}
1150
1151/* create a new cctx only suitable as source */
1152static coro_cctx *
1153cctx_new_empty ()
1154{
1155 coro_cctx *cctx = cctx_new ();
1156
1157 cctx->sptr = 0;
1158 coro_create (&cctx->cctx, 0, 0, 0, 0);
1159
1160 return cctx;
1161}
1162
1163/* create a new cctx suitable as destination/running a perl interpreter */
1164static coro_cctx *
1165cctx_new_run ()
1166{
1167 coro_cctx *cctx = cctx_new ();
1168 void *stack_start;
1169 size_t stack_size;
1170
1171#if HAVE_MMAP
1172 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1173 /* mmap supposedly does allocate-on-write for us */
1174 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1175
1176 if (cctx->sptr != (void *)-1)
1177 {
1178# if CORO_STACKGUARD
1179 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1180# endif
1181 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
1182 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1183 cctx->flags |= CC_MAPPED;
1184 }
1185 else
1186#endif
1187 {
1188 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1189 New (0, cctx->sptr, cctx_stacksize, long);
1190
1191 if (!cctx->sptr)
1192 {
1193 perror ("FATAL: unable to allocate stack for coroutine");
1194 _exit (EXIT_FAILURE);
1195 }
1196
1197 stack_start = cctx->sptr;
1198 stack_size = cctx->ssize;
1199 }
1200
1201 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1202 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1203
1204 return cctx;
1205}
1206
1207static void
1208cctx_destroy (coro_cctx *cctx)
1209{
1210 if (!cctx)
1211 return;
1212
1213 --cctx_count;
1214 coro_destroy (&cctx->cctx);
1215
1216 /* coro_transfer creates new, empty cctx's */
550 if (ctx->sptr) 1217 if (cctx->sptr)
1218 {
1219#if CORO_USE_VALGRIND
1220 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1221#endif
1222
1223#if HAVE_MMAP
1224 if (cctx->flags & CC_MAPPED)
1225 munmap (cctx->sptr, cctx->ssize);
1226 else
1227#endif
1228 Safefree (cctx->sptr);
551 { 1229 }
1230
1231 Safefree (cctx);
1232}
1233
1234/* wether this cctx should be destructed */
1235#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1236
1237static coro_cctx *
1238cctx_get (pTHX)
1239{
1240 while (expect_true (cctx_first))
1241 {
1242 coro_cctx *cctx = cctx_first;
1243 cctx_first = cctx->next;
1244 --cctx_idle;
1245
1246 if (expect_true (!CCTX_EXPIRED (cctx)))
1247 return cctx;
1248
1249 cctx_destroy (cctx);
1250 }
1251
1252 return cctx_new_run ();
1253}
1254
1255static void
1256cctx_put (coro_cctx *cctx)
1257{
1258 assert (("cctx_put called on non-initialised cctx", cctx->sptr));
1259
1260 /* free another cctx if overlimit */
1261 if (expect_false (cctx_idle >= cctx_max_idle))
1262 {
1263 coro_cctx *first = cctx_first;
1264 cctx_first = first->next;
1265 --cctx_idle;
1266
1267 cctx_destroy (first);
1268 }
1269
1270 ++cctx_idle;
1271 cctx->next = cctx_first;
1272 cctx_first = cctx;
1273}
1274
1275/** coroutine switching *****************************************************/
1276
1277static void
1278transfer_check (pTHX_ struct coro *prev, struct coro *next)
1279{
1280 if (expect_true (prev != next))
1281 {
1282 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1283 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1284
1285 if (expect_false (next->flags & CF_RUNNING))
1286 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1287
1288 if (expect_false (next->flags & CF_DESTROYED))
1289 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1290
1291#if !PERL_VERSION_ATLEAST (5,10,0)
1292 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1293 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1294#endif
1295 }
1296}
1297
1298/* always use the TRANSFER macro */
1299static void NOINLINE
1300transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1301{
1302 dSTACKLEVEL;
1303
1304 /* sometimes transfer is only called to set idle_sp */
1305 if (expect_false (!next))
1306 {
1307 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1308 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1309 }
1310 else if (expect_true (prev != next))
1311 {
1312 coro_cctx *prev__cctx;
1313
1314 if (expect_false (prev->flags & CF_NEW))
1315 {
1316 /* create a new empty/source context */
1317 prev->cctx = cctx_new_empty ();
1318 prev->flags &= ~CF_NEW;
1319 prev->flags |= CF_RUNNING;
1320 }
1321
1322 prev->flags &= ~CF_RUNNING;
1323 next->flags |= CF_RUNNING;
1324
1325 LOCK;
1326
1327 /* first get rid of the old state */
1328 save_perl (aTHX_ prev);
1329
1330 if (expect_false (next->flags & CF_NEW))
1331 {
1332 /* need to start coroutine */
1333 next->flags &= ~CF_NEW;
1334 /* setup coroutine call */
1335 coro_setup (aTHX_ next);
1336 }
1337 else
1338 load_perl (aTHX_ next);
1339
1340 prev__cctx = prev->cctx;
1341
1342 /* possibly "free" the cctx */
1343 if (expect_true (
1344 prev__cctx->idle_sp == STACKLEVEL
1345 && !(prev__cctx->flags & CC_TRACE)
1346 && !force_cctx
1347 ))
1348 {
1349 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1350 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
1351
1352 prev->cctx = 0;
1353
1354 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1355 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1356 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1357 if (!next->cctx)
1358 next->cctx = cctx_get (aTHX);
1359
1360 cctx_put (prev__cctx);
1361 }
1362
1363 ++next->usecount;
1364
1365 if (expect_true (!next->cctx))
1366 next->cctx = cctx_get (aTHX);
1367
1368 assert (("FATAL ERROR: internal error 1352 in Coro, please report", !transfer_next));//D
1369 transfer_next = next;
1370
1371 if (expect_false (prev__cctx != next->cctx))
1372 {
1373 prev__cctx->top_env = PL_top_env;
1374 PL_top_env = next->cctx->top_env;
1375 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1376 }
1377
1378 transfer_tail ();
1379 }
1380}
1381
1382#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1383#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1384
1385/** high level stuff ********************************************************/
1386
1387static int
1388coro_state_destroy (pTHX_ struct coro *coro)
1389{
1390 if (coro->flags & CF_DESTROYED)
1391 return 0;
1392
1393 coro->flags |= CF_DESTROYED;
1394
1395 if (coro->flags & CF_READY)
1396 {
1397 /* reduce nready, as destroying a ready coro effectively unreadies it */
1398 /* alternative: look through all ready queues and remove the coro */
1399 LOCK;
1400 --coro_nready;
1401 UNLOCK;
1402 }
1403 else
1404 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1405
1406 if (coro->mainstack && coro->mainstack != main_mainstack)
1407 {
1408 struct coro temp;
1409
1410 if (coro->flags & CF_RUNNING)
1411 croak ("FATAL: tried to destroy currently running coroutine");
1412
1413 save_perl (aTHX_ &temp);
1414 load_perl (aTHX_ coro);
1415
1416 coro_destruct (aTHX_ coro);
1417
1418 load_perl (aTHX_ &temp);
1419
1420 coro->slot = 0;
1421 }
1422
1423 cctx_destroy (coro->cctx);
1424 SvREFCNT_dec (coro->args);
1425
1426 if (coro->next) coro->next->prev = coro->prev;
1427 if (coro->prev) coro->prev->next = coro->next;
1428 if (coro == coro_first) coro_first = coro->next;
1429
1430 return 1;
1431}
1432
1433static int
1434coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1435{
1436 struct coro *coro = (struct coro *)mg->mg_ptr;
1437 mg->mg_ptr = 0;
1438
1439 coro->hv = 0;
1440
1441 if (--coro->refcnt < 0)
1442 {
1443 coro_state_destroy (aTHX_ coro);
1444 Safefree (coro);
1445 }
1446
1447 return 0;
1448}
1449
1450static int
1451coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1452{
1453 struct coro *coro = (struct coro *)mg->mg_ptr;
1454
1455 ++coro->refcnt;
1456
1457 return 0;
1458}
1459
1460static MGVTBL coro_state_vtbl = {
1461 0, 0, 0, 0,
1462 coro_state_free,
1463 0,
1464#ifdef MGf_DUP
1465 coro_state_dup,
1466#else
1467# define MGf_DUP 0
1468#endif
1469};
1470
1471static void
1472prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1473{
1474 ta->prev = SvSTATE (prev_sv);
1475 ta->next = SvSTATE (next_sv);
1476 TRANSFER_CHECK (*ta);
1477}
1478
1479static void
1480api_transfer (SV *prev_sv, SV *next_sv)
1481{
1482 dTHX;
1483 struct transfer_args ta;
1484
1485 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1486 TRANSFER (ta, 1);
1487}
1488
1489/** Coro ********************************************************************/
1490
1491static void
1492coro_enq (pTHX_ SV *coro_sv)
1493{
1494 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1495}
1496
1497static SV *
1498coro_deq (pTHX)
1499{
1500 int prio;
1501
1502 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1503 if (AvFILLp (coro_ready [prio]) >= 0)
1504 return av_shift (coro_ready [prio]);
1505
1506 return 0;
1507}
1508
1509static int
1510api_ready (SV *coro_sv)
1511{
1512 dTHX;
1513 struct coro *coro;
1514 SV *sv_hook;
1515 void (*xs_hook)(void);
1516
1517 if (SvROK (coro_sv))
1518 coro_sv = SvRV (coro_sv);
1519
1520 coro = SvSTATE (coro_sv);
1521
1522 if (coro->flags & CF_READY)
1523 return 0;
1524
1525 coro->flags |= CF_READY;
1526
1527 LOCK;
1528
1529 sv_hook = coro_nready ? 0 : coro_readyhook;
1530 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1531
1532 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1533 ++coro_nready;
1534
1535 UNLOCK;
1536
1537 if (sv_hook)
1538 {
1539 dSP;
1540
1541 ENTER;
1542 SAVETMPS;
1543
552 PUSHMARK(SP); 1544 PUSHMARK (SP);
553 PUTBACK; 1545 PUTBACK;
554 (void) call_sv (sub_init, G_VOID|G_NOARGS); 1546 call_sv (sv_hook, G_DISCARD);
555 croak ("FATAL: CCTXT coroutine returned!"); 1547 SPAGAIN;
1548
1549 FREETMPS;
1550 LEAVE;
1551 }
1552
1553 if (xs_hook)
1554 xs_hook ();
1555
1556 return 1;
1557}
1558
1559static int
1560api_is_ready (SV *coro_sv)
1561{
1562 dTHX;
1563 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1564}
1565
1566static void
1567prepare_schedule (pTHX_ struct transfer_args *ta)
1568{
1569 SV *prev_sv, *next_sv;
1570
1571 for (;;)
1572 {
1573 LOCK;
1574 next_sv = coro_deq (aTHX);
1575
1576 /* nothing to schedule: call the idle handler */
1577 if (expect_false (!next_sv))
1578 {
1579 dSP;
1580 UNLOCK;
1581
1582 ENTER;
1583 SAVETMPS;
1584
1585 PUSHMARK (SP);
1586 PUTBACK;
1587 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1588 SPAGAIN;
1589
1590 FREETMPS;
1591 LEAVE;
1592 continue;
1593 }
1594
1595 ta->next = SvSTATE (next_sv);
1596
1597 /* cannot transfer to destroyed coros, skip and look for next */
1598 if (expect_false (ta->next->flags & CF_DESTROYED))
1599 {
1600 UNLOCK;
1601 SvREFCNT_dec (next_sv);
1602 /* coro_nready has already been taken care of by destroy */
1603 continue;
1604 }
1605
1606 --coro_nready;
1607 UNLOCK;
1608 break;
1609 }
1610
1611 /* free this only after the transfer */
1612 prev_sv = SvRV (coro_current);
1613 ta->prev = SvSTATE (prev_sv);
1614 TRANSFER_CHECK (*ta);
1615 assert (ta->next->flags & CF_READY);
1616 ta->next->flags &= ~CF_READY;
1617 SvRV_set (coro_current, next_sv);
1618
1619 LOCK;
1620 free_coro_mortal (aTHX);
1621 coro_mortal = prev_sv;
1622 UNLOCK;
1623}
1624
1625static void
1626prepare_cede (pTHX_ struct transfer_args *ta)
1627{
1628 api_ready (coro_current);
1629 prepare_schedule (aTHX_ ta);
1630}
1631
1632static int
1633prepare_cede_notself (pTHX_ struct transfer_args *ta)
1634{
1635 if (coro_nready)
1636 {
1637 SV *prev = SvRV (coro_current);
1638 prepare_schedule (aTHX_ ta);
1639 api_ready (prev);
1640 return 1;
556 } 1641 }
557 else 1642 else
558 { 1643 return 0;
559 UNOP myop; 1644}
560 1645
561 PL_op = (OP *)&myop; 1646static void
1647api_schedule (void)
1648{
1649 dTHX;
1650 struct transfer_args ta;
562 1651
563 Zero(&myop, 1, UNOP); 1652 prepare_schedule (aTHX_ &ta);
564 myop.op_next = Nullop; 1653 TRANSFER (ta, 1);
565 myop.op_flags = OPf_WANT_VOID; 1654}
566 1655
567 PUSHMARK(SP); 1656static int
568 XPUSHs (sub_init); 1657api_cede (void)
569 /* 1658{
570 * the next line is slightly wrong, as PL_op->op_next 1659 dTHX;
571 * is actually being executed so we skip the first op. 1660 struct transfer_args ta;
572 * that doesn't matter, though, since it is only
573 * pp_nextstate and we never return...
574 * ah yes, and I don't care anyways ;)
575 */
576 PUTBACK;
577 PL_op = pp_entersub();
578 SPAGAIN;
579 1661
580 ENTER; /* necessary e.g. for dounwind */ 1662 prepare_cede (aTHX_ &ta);
1663
1664 if (expect_true (ta.prev != ta.next))
581 } 1665 {
582} 1666 TRANSFER (ta, 1);
583 1667 return 1;
584STATIC void
585transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
586{
587 dSP;
588
589 if (prev != next)
590 { 1668 }
591 /* 1669 else
592 * this could be done in newprocess which would lead to 1670 return 0;
593 * extremely elegant and fast (basically just SAVE/LOAD) 1671}
594 * code here, but lazy allocation of stacks has also 1672
595 * some virtues and the overhead of the if() is nil. 1673static int
596 */ 1674api_cede_notself (void)
597 if (next->mainstack) 1675{
1676 dTHX;
1677 struct transfer_args ta;
1678
1679 if (prepare_cede_notself (aTHX_ &ta))
1680 {
1681 TRANSFER (ta, 1);
1682 return 1;
1683 }
1684 else
1685 return 0;
1686}
1687
1688static void
1689api_trace (SV *coro_sv, int flags)
1690{
1691 dTHX;
1692 struct coro *coro = SvSTATE (coro_sv);
1693
1694 if (flags & CC_TRACE)
1695 {
1696 if (!coro->cctx)
1697 coro->cctx = cctx_new_run ();
1698 else if (!(coro->cctx->flags & CC_TRACE))
1699 croak ("cannot enable tracing on coroutine with custom stack");
1700
1701 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1702 }
1703 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1704 {
1705 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1706
1707 if (coro->flags & CF_RUNNING)
1708 PL_runops = RUNOPS_DEFAULT;
1709 else
1710 coro->slot->runops = RUNOPS_DEFAULT;
1711 }
1712}
1713
1714#if 0
1715static int
1716coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1717{
1718 AV *padlist;
1719 AV *av = (AV *)mg->mg_obj;
1720
1721 abort ();
1722
1723 return 0;
1724}
1725
1726static MGVTBL coro_gensub_vtbl = {
1727 0, 0, 0, 0,
1728 coro_gensub_free
1729};
1730#endif
1731
1732/*****************************************************************************/
1733/* PerlIO::cede */
1734
1735typedef struct
1736{
1737 PerlIOBuf base;
1738 NV next, every;
1739} PerlIOCede;
1740
1741static IV
1742PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1743{
1744 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1745
1746 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1747 self->next = nvtime () + self->every;
1748
1749 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1750}
1751
1752static SV *
1753PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1754{
1755 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1756
1757 return newSVnv (self->every);
1758}
1759
1760static IV
1761PerlIOCede_flush (pTHX_ PerlIO *f)
1762{
1763 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1764 double now = nvtime ();
1765
1766 if (now >= self->next)
1767 {
1768 api_cede ();
1769 self->next = now + self->every;
1770 }
1771
1772 return PerlIOBuf_flush (aTHX_ f);
1773}
1774
1775static PerlIO_funcs PerlIO_cede =
1776{
1777 sizeof(PerlIO_funcs),
1778 "cede",
1779 sizeof(PerlIOCede),
1780 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1781 PerlIOCede_pushed,
1782 PerlIOBuf_popped,
1783 PerlIOBuf_open,
1784 PerlIOBase_binmode,
1785 PerlIOCede_getarg,
1786 PerlIOBase_fileno,
1787 PerlIOBuf_dup,
1788 PerlIOBuf_read,
1789 PerlIOBuf_unread,
1790 PerlIOBuf_write,
1791 PerlIOBuf_seek,
1792 PerlIOBuf_tell,
1793 PerlIOBuf_close,
1794 PerlIOCede_flush,
1795 PerlIOBuf_fill,
1796 PerlIOBase_eof,
1797 PerlIOBase_error,
1798 PerlIOBase_clearerr,
1799 PerlIOBase_setlinebuf,
1800 PerlIOBuf_get_base,
1801 PerlIOBuf_bufsiz,
1802 PerlIOBuf_get_ptr,
1803 PerlIOBuf_get_cnt,
1804 PerlIOBuf_set_ptrcnt,
1805};
1806
1807
1808MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1809
1810PROTOTYPES: DISABLE
1811
1812BOOT:
1813{
1814#ifdef USE_ITHREADS
1815 MUTEX_INIT (&coro_lock);
1816# if CORO_PTHREAD
1817 coro_thx = PERL_GET_CONTEXT;
1818# endif
1819#endif
1820 BOOT_PAGESIZE;
1821
1822 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1823 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1824
1825 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1826 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1827 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1828
1829 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1830 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1831 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1832
1833 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1834
1835 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1836 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1837 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1838 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1839
1840 main_mainstack = PL_mainstack;
1841 main_top_env = PL_top_env;
1842
1843 while (main_top_env->je_prev)
1844 main_top_env = main_top_env->je_prev;
1845
1846 coroapi.ver = CORO_API_VERSION;
1847 coroapi.rev = CORO_API_REVISION;
1848 coroapi.transfer = api_transfer;
1849
598 { 1850 {
599 SAVE (prev, flags); 1851 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
600 LOAD (next);
601 1852
602 /* mark this state as in-use */ 1853 if (!svp) croak ("Time::HiRes is required");
603 next->mainstack = 0; 1854 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
604 next->tmps_ix = -2;
605 1855
606 if (flags & TRANSFER_SAVE_CCTXT) 1856 nvtime = INT2PTR (double (*)(), SvIV (*svp));
607 {
608 if (!next->ssize)
609 croak ("destination coroutine has no CCTXT (%p, %d)", next->sptr, next->ssize);
610
611 if (!prev->ssize)
612 prev->ssize = 1; /* mark cctx as valid ;) */
613
614 coro_transfer (&(prev->cctx), &(next->cctx));
615 }
616
617 } 1857 }
618 else if (next->tmps_ix == -2)
619 croak ("tried to transfer to running coroutine");
620 else
621 {
622 SAVE (prev, -1); /* first get rid of the old state */
623 1858
624 if (flags & TRANSFER_SAVE_CCTXT) 1859 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
625 {
626 if (!next->ssize)
627 {
628 allocate_stack (next);
629 coro_create (&(next->cctx),
630 setup_coro, (void *)next,
631 next->sptr, next->ssize);
632 }
633
634 if (!prev->ssize)
635 prev->ssize = 1; /* mark cctx as valid ;) */
636
637 coro_transfer (&(prev->cctx), &(next->cctx));
638 }
639 else
640 setup_coro (next);
641 }
642 }
643} 1860}
644 1861
645MODULE = Coro::State PACKAGE = Coro::State 1862SV *
646 1863new (char *klass, ...)
647PROTOTYPES: ENABLE
648
649BOOT:
650{ /* {} necessary for stoopid perl-5.6.x */
651 coro_state_stash = gv_stashpvn ("Coro::State", 10, TRUE);
652
653 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
654 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
655 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
656 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
657
658 if (!padlist_cache)
659 padlist_cache = newHV ();
660
661 main_mainstack = PL_mainstack;
662}
663
664Coro::State
665_newprocess(args)
666 SV * args
667 PROTOTYPE: $
668 CODE: 1864 CODE:
669 Coro__State coro; 1865{
1866 struct coro *coro;
1867 MAGIC *mg;
1868 HV *hv;
1869 int i;
670 1870
671 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
672 croak ("Coro::State::_newprocess expects an arrayref");
673
674 New (0, coro, 1, struct coro); 1871 Newz (0, coro, 1, struct coro);
1872 coro->args = newAV ();
1873 coro->flags = CF_NEW;
675 1874
676 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1875 if (coro_first) coro_first->prev = coro;
677 coro->mainstack = 0; /* actual work is done inside transfer */ 1876 coro->next = coro_first;
678 coro->sptr = 0; 1877 coro_first = coro;
679 coro->ssize = 0;
680 1878
681 RETVAL = coro; 1879 coro->hv = hv = newHV ();
1880 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1881 mg->mg_flags |= MGf_DUP;
1882 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1883
1884 av_extend (coro->args, items - 1);
1885 for (i = 1; i < items; i++)
1886 av_push (coro->args, newSVsv (ST (i)));
1887}
682 OUTPUT: 1888 OUTPUT:
683 RETVAL 1889 RETVAL
684 1890
1891# these not obviously related functions are all rolled into the same xs
1892# function to increase chances that they all will call transfer with the same
1893# stack offset
685void 1894void
686transfer(prev, next, flags = TRANSFER_SAVE_ALL) 1895_set_stacklevel (...)
687 Coro::State_or_hashref prev 1896 ALIAS:
688 Coro::State_or_hashref next 1897 Coro::State::transfer = 1
689 int flags 1898 Coro::schedule = 2
690 PROTOTYPE: @ 1899 Coro::cede = 3
1900 Coro::cede_notself = 4
691 CODE: 1901 CODE:
692 transfer (aTHX_ prev, next, flags); 1902{
1903 struct transfer_args ta;
1904
1905 PUTBACK;
1906 switch (ix)
1907 {
1908 case 0:
1909 prepare_set_stacklevel (&ta, (struct coro_cctx *)SvIV (ST (0)));
1910 break;
1911
1912 case 1:
1913 if (items != 2)
1914 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d", items);
1915
1916 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1917 break;
1918
1919 case 2:
1920 prepare_schedule (aTHX_ &ta);
1921 break;
1922
1923 case 3:
1924 prepare_cede (aTHX_ &ta);
1925 break;
1926
1927 case 4:
1928 if (!prepare_cede_notself (aTHX_ &ta))
1929 XSRETURN_EMPTY;
1930
1931 break;
1932 }
1933 SPAGAIN;
1934
1935 BARRIER;
1936 PUTBACK;
1937 TRANSFER (ta, 0);
1938 SPAGAIN; /* might be the sp of a different coroutine now */
1939 /* be extra careful not to ever do anything after TRANSFER */
1940}
1941
1942bool
1943_destroy (SV *coro_sv)
1944 CODE:
1945 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1946 OUTPUT:
1947 RETVAL
693 1948
694void 1949void
695DESTROY(coro) 1950_exit (int code)
696 Coro::State coro 1951 PROTOTYPE: $
697 CODE: 1952 CODE:
1953 _exit (code);
698 1954
699 if (coro->mainstack && coro->mainstack != main_mainstack) 1955int
1956cctx_stacksize (int new_stacksize = 0)
1957 CODE:
1958 RETVAL = cctx_stacksize;
1959 if (new_stacksize)
1960 {
1961 cctx_stacksize = new_stacksize;
1962 ++cctx_gen;
1963 }
1964 OUTPUT:
1965 RETVAL
1966
1967int
1968cctx_max_idle (int max_idle = 0)
1969 CODE:
1970 RETVAL = cctx_max_idle;
1971 if (max_idle > 1)
1972 cctx_max_idle = max_idle;
1973 OUTPUT:
1974 RETVAL
1975
1976int
1977cctx_count ()
1978 CODE:
1979 RETVAL = cctx_count;
1980 OUTPUT:
1981 RETVAL
1982
1983int
1984cctx_idle ()
1985 CODE:
1986 RETVAL = cctx_idle;
1987 OUTPUT:
1988 RETVAL
1989
1990void
1991list ()
1992 PPCODE:
1993{
1994 struct coro *coro;
1995 for (coro = coro_first; coro; coro = coro->next)
1996 if (coro->hv)
1997 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1998}
1999
2000void
2001call (Coro::State coro, SV *coderef)
2002 ALIAS:
2003 eval = 1
2004 CODE:
2005{
2006 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
700 { 2007 {
701 struct coro temp; 2008 struct coro temp;
702 2009
703 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 2010 if (!(coro->flags & CF_RUNNING))
704 LOAD(aTHX_ coro); 2011 {
2012 PUTBACK;
2013 save_perl (aTHX_ &temp);
2014 load_perl (aTHX_ coro);
2015 }
705 2016
706 destroy_stacks (aTHX); 2017 {
2018 dSP;
2019 ENTER;
2020 SAVETMPS;
2021 PUTBACK;
2022 PUSHSTACK;
2023 PUSHMARK (SP);
707 2024
708 LOAD((&temp)); /* this will get rid of defsv etc.. */ 2025 if (ix)
2026 eval_sv (coderef, 0);
2027 else
2028 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
709 2029
710 coro->mainstack = 0; 2030 POPSTACK;
2031 SPAGAIN;
2032 FREETMPS;
2033 LEAVE;
2034 PUTBACK;
2035 }
2036
2037 if (!(coro->flags & CF_RUNNING))
2038 {
2039 save_perl (aTHX_ coro);
2040 load_perl (aTHX_ &temp);
2041 SPAGAIN;
2042 }
711 } 2043 }
2044}
712 2045
713 if (coro->sptr) 2046SV *
2047is_ready (Coro::State coro)
2048 PROTOTYPE: $
2049 ALIAS:
2050 is_ready = CF_READY
2051 is_running = CF_RUNNING
2052 is_new = CF_NEW
2053 is_destroyed = CF_DESTROYED
2054 CODE:
2055 RETVAL = boolSV (coro->flags & ix);
2056 OUTPUT:
2057 RETVAL
2058
2059void
2060throw (Coro::State self, SV *throw = &PL_sv_undef)
2061 PROTOTYPE: $;$
2062 CODE:
2063 SvREFCNT_dec (self->throw);
2064 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2065
2066void
2067api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
2068
2069SV *
2070has_cctx (Coro::State coro)
2071 PROTOTYPE: $
2072 CODE:
2073 RETVAL = boolSV (!!coro->cctx);
2074 OUTPUT:
2075 RETVAL
2076
2077int
2078is_traced (Coro::State coro)
2079 PROTOTYPE: $
2080 CODE:
2081 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2082 OUTPUT:
2083 RETVAL
2084
2085UV
2086rss (Coro::State coro)
2087 PROTOTYPE: $
2088 ALIAS:
2089 usecount = 1
2090 CODE:
2091 switch (ix)
2092 {
2093 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2094 case 1: RETVAL = coro->usecount; break;
2095 }
2096 OUTPUT:
2097 RETVAL
2098
2099void
2100force_cctx ()
2101 CODE:
2102 struct coro *coro = SvSTATE (coro_current);
2103 coro->cctx->idle_sp = 0;
2104
2105void
2106swap_defsv (Coro::State self)
2107 PROTOTYPE: $
2108 ALIAS:
2109 swap_defav = 1
2110 CODE:
2111 if (!self->slot)
2112 croak ("cannot swap state with coroutine that has no saved state");
2113 else
714 { 2114 {
715 deallocate_stack (coro); 2115 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
716 coro->sptr = 0; 2116 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2117
2118 SV *tmp = *src; *src = *dst; *dst = tmp;
717 } 2119 }
718 2120
719 Safefree (coro); 2121MODULE = Coro::State PACKAGE = Coro
2122
2123BOOT:
2124{
2125 int i;
2126
2127 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2128 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2129 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2130
2131 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2132 SvREADONLY_on (coro_current);
2133
2134 coro_stash = gv_stashpv ("Coro", TRUE);
2135
2136 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
2137 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
2138 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
2139 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
2140 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
2141 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
2142
2143 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2144 coro_ready[i] = newAV ();
2145
2146 {
2147 SV *sv = perl_get_sv ("Coro::API", TRUE);
2148 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
2149
2150 coroapi.schedule = api_schedule;
2151 coroapi.cede = api_cede;
2152 coroapi.cede_notself = api_cede_notself;
2153 coroapi.ready = api_ready;
2154 coroapi.is_ready = api_is_ready;
2155 coroapi.nready = &coro_nready;
2156 coroapi.current = coro_current;
2157
2158 GCoroAPI = &coroapi;
2159 sv_setiv (sv, (IV)&coroapi);
2160 SvREADONLY_on (sv);
2161 }
2162}
720 2163
721void 2164void
722flush() 2165_set_current (SV *current)
2166 PROTOTYPE: $
723 CODE: 2167 CODE:
724#ifdef MAY_FLUSH 2168 SvREFCNT_dec (SvRV (coro_current));
725 flush_padlist_cache (); 2169 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
726#endif
727
728MODULE = Coro::State PACKAGE = Coro::Cont
729
730# this is slightly dirty
731 2170
732void 2171void
733yield(...) 2172_set_readyhook (SV *hook)
2173 PROTOTYPE: $
2174 CODE:
2175 LOCK;
2176 SvREFCNT_dec (coro_readyhook);
2177 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2178 UNLOCK;
2179
2180int
2181prio (Coro::State coro, int newprio = 0)
2182 ALIAS:
2183 nice = 1
2184 CODE:
2185{
2186 RETVAL = coro->prio;
2187
2188 if (items > 1)
2189 {
2190 if (ix)
2191 newprio = coro->prio - newprio;
2192
2193 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2194 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2195
2196 coro->prio = newprio;
2197 }
2198}
2199 OUTPUT:
2200 RETVAL
2201
2202SV *
2203ready (SV *self)
2204 PROTOTYPE: $
2205 CODE:
2206 RETVAL = boolSV (api_ready (self));
2207 OUTPUT:
2208 RETVAL
2209
2210int
2211nready (...)
2212 PROTOTYPE:
2213 CODE:
2214 RETVAL = coro_nready;
2215 OUTPUT:
2216 RETVAL
2217
2218# for async_pool speedup
2219void
2220_pool_1 (SV *cb)
2221 CODE:
2222{
2223 struct coro *coro = SvSTATE (coro_current);
2224 HV *hv = (HV *)SvRV (coro_current);
2225 AV *defav = GvAV (PL_defgv);
2226 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2227 AV *invoke_av;
2228 int i, len;
2229
2230 if (!invoke)
2231 {
2232 SV *old = PL_diehook;
2233 PL_diehook = 0;
2234 SvREFCNT_dec (old);
2235 croak ("\3async_pool terminate\2\n");
2236 }
2237
2238 SvREFCNT_dec (coro->saved_deffh);
2239 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2240
2241 hv_store (hv, "desc", sizeof ("desc") - 1,
2242 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2243
2244 invoke_av = (AV *)SvRV (invoke);
2245 len = av_len (invoke_av);
2246
2247 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2248
2249 if (len > 0)
2250 {
2251 av_fill (defav, len - 1);
2252 for (i = 0; i < len; ++i)
2253 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2254 }
2255
2256 SvREFCNT_dec (invoke);
2257}
2258
2259void
2260_pool_2 (SV *cb)
2261 CODE:
2262{
2263 struct coro *coro = SvSTATE (coro_current);
2264
2265 sv_setsv (cb, &PL_sv_undef);
2266
2267 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2268 coro->saved_deffh = 0;
2269
2270 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2271 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2272 {
2273 SV *old = PL_diehook;
2274 PL_diehook = 0;
2275 SvREFCNT_dec (old);
2276 croak ("\3async_pool terminate\2\n");
2277 }
2278
2279 av_clear (GvAV (PL_defgv));
2280 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2281 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2282
2283 coro->prio = 0;
2284
2285 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2286 api_trace (coro_current, 0);
2287
2288 av_push (av_async_pool, newSVsv (coro_current));
2289}
2290
2291#if 0
2292
2293void
2294_generator_call (...)
734 PROTOTYPE: @ 2295 PROTOTYPE: @
2296 PPCODE:
2297 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2298 xxxx
2299 abort ();
2300
2301SV *
2302gensub (SV *sub, ...)
2303 PROTOTYPE: &;@
735 CODE: 2304 CODE:
736 static SV *returnstk; 2305{
2306 struct coro *coro;
2307 MAGIC *mg;
737 SV *sv; 2308 CV *xcv;
2309 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2310 int i;
2311
2312 CvGV (ncv) = CvGV (cv);
2313 CvFILE (ncv) = CvFILE (cv);
2314
2315 Newz (0, coro, 1, struct coro);
2316 coro->args = newAV ();
2317 coro->flags = CF_NEW;
2318
2319 av_extend (coro->args, items - 1);
2320 for (i = 1; i < items; i++)
2321 av_push (coro->args, newSVsv (ST (i)));
2322
2323 CvISXSUB_on (ncv);
2324 CvXSUBANY (ncv).any_ptr = (void *)coro;
2325
2326 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2327
2328 CvXSUB (ncv) = CvXSUB (xcv);
2329 CvANON_on (ncv);
2330
2331 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2332 RETVAL = newRV_noinc ((SV *)ncv);
2333}
2334 OUTPUT:
2335 RETVAL
2336
2337#endif
2338
2339
2340MODULE = Coro::State PACKAGE = Coro::AIO
2341
2342void
2343_get_state (SV *self)
2344 PPCODE:
2345{
738 AV *defav = GvAV (PL_defgv); 2346 AV *defav = GvAV (PL_defgv);
739 struct coro *prev, *next; 2347 AV *av = newAV ();
2348 int i;
2349 SV *data_sv = newSV (sizeof (struct io_state));
2350 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2351 SvCUR_set (data_sv, sizeof (struct io_state));
2352 SvPOK_only (data_sv);
740 2353
741 if (!returnstk) 2354 data->errorno = errno;
742 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 2355 data->laststype = PL_laststype;
2356 data->laststatval = PL_laststatval;
2357 data->statcache = PL_statcache;
743 2358
744 /* set up @_ -- ugly */ 2359 av_extend (av, AvFILLp (defav) + 1 + 1);
745 av_clear (defav);
746 av_fill (defav, items - 1);
747 while (items--)
748 av_store (defav, items, SvREFCNT_inc (ST(items)));
749 2360
750 mg_get (returnstk); /* isn't documentation wrong for mg_get? */ 2361 for (i = 0; i <= AvFILLp (defav); ++i)
751 sv = av_pop ((AV *)SvRV (returnstk)); 2362 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
752 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
753 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
754 SvREFCNT_dec (sv);
755 2363
756 transfer(aTHX_ prev, next, 0); 2364 av_push (av, data_sv);
757 2365
2366 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2367
2368 api_ready (self);
2369}
2370
2371void
2372_set_state (SV *state)
2373 PROTOTYPE: $
2374 PPCODE:
2375{
2376 AV *av = (AV *)SvRV (state);
2377 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2378 int i;
2379
2380 errno = data->errorno;
2381 PL_laststype = data->laststype;
2382 PL_laststatval = data->laststatval;
2383 PL_statcache = data->statcache;
2384
2385 EXTEND (SP, AvFILLp (av));
2386 for (i = 0; i < AvFILLp (av); ++i)
2387 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2388}
2389
2390
2391MODULE = Coro::State PACKAGE = Coro::AnyEvent
2392
2393BOOT:
2394 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2395
2396SV *
2397_schedule (...)
2398 PROTOTYPE: @
2399 CODE:
2400{
2401 static int incede;
2402
2403 api_cede_notself ();
2404
2405 ++incede;
2406 while (coro_nready >= incede && api_cede ())
2407 ;
2408
2409 sv_setsv (sv_activity, &PL_sv_undef);
2410 if (coro_nready >= incede)
2411 {
2412 PUSHMARK (SP);
2413 PUTBACK;
2414 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2415 SPAGAIN;
2416 }
2417
2418 --incede;
2419}
2420
2421
2422MODULE = Coro::State PACKAGE = PerlIO::cede
2423
2424BOOT:
2425 PerlIO_define_layer (aTHX_ &PerlIO_cede);

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