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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 1.250 by root, Wed Oct 22 16:34:07 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 */
57#define MAX_IDLE_CCTX 8
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/* 5.8.8 */
87#ifndef GV_NOTQUAL
88# define GV_NOTQUAL 0
89#endif
90#ifndef newSV
91# define newSV(l) NEWSV(0,l)
92#endif
93#ifndef SvREFCNT_inc_NN
94# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
95#endif
96
97/* 5.11 */
98#ifndef CxHASARGS
99# define CxHASARGS(cx) (cx)->blk_sub.hasargs
100#endif
101
102/* 5.8.7 */
103#ifndef SvRV_set
104# define SvRV_set(s,v) SvRV(s) = (v)
105#endif
106
107#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
108# undef CORO_STACKGUARD
109#endif
110
111#ifndef CORO_STACKGUARD
112# define CORO_STACKGUARD 0
113#endif
114
115/* prefer perl internal functions over our own? */
116#ifndef CORO_PREFER_PERL_FUNCTIONS
117# define CORO_PREFER_PERL_FUNCTIONS 0
118#endif
119
120/* The next macros try to return the current stack pointer, in an as
121 * portable way as possible. */
122#define dSTACKLEVEL volatile char stacklevel
123#define STACKLEVEL ((void *)&stacklevel)
124
125#define IN_DESTRUCT (PL_main_cv == Nullcv)
126
127#if __GNUC__ >= 3
128# define attribute(x) __attribute__(x)
129# define BARRIER __asm__ __volatile__ ("" : : : "memory")
130# define expect(expr,value) __builtin_expect ((expr),(value))
131#else
132# define attribute(x)
133# define BARRIER
134# define expect(expr,value) (expr)
135#endif
136
137#define expect_false(expr) expect ((expr) != 0, 0)
138#define expect_true(expr) expect ((expr) != 0, 1)
139
140#define NOINLINE attribute ((noinline))
141
142#include "CoroAPI.h"
143
144#ifdef USE_ITHREADS
145static perl_mutex coro_mutex;
146# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
147# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
148#else
149# define LOCK (void)0
150# define UNLOCK (void)0
151#endif
152
153/* helper storage struct for Coro::AIO */
154struct io_state
155{
156 AV *res;
157 int errorno;
158 I32 laststype;
159 int laststatval;
160 Stat_t statcache;
161};
162
163static double (*nvtime)(); /* so why doesn't it take void? */
164
165static size_t coro_stacksize = CORO_STACKSIZE;
166static struct CoroAPI coroapi;
167static AV *main_mainstack; /* used to differentiate between $main and others */
168static JMPENV *main_top_env;
169static HV *coro_state_stash, *coro_stash;
170static volatile SV *coro_mortal; /* will be freed after next transfer */
171
172static GV *irsgv; /* $/ */
173static GV *stdoutgv; /* *STDOUT */
174static SV *rv_diehook;
175static SV *rv_warnhook;
176static HV *hv_sig; /* %SIG */
177
178/* async_pool helper stuff */
179static SV *sv_pool_rss;
180static SV *sv_pool_size;
181static AV *av_async_pool;
182
183/* Coro::AnyEvent */
184static SV *sv_activity;
185
186static struct coro_cctx *cctx_first;
187static int cctx_count, cctx_idle;
188
189enum {
190 CC_MAPPED = 0x01,
191 CC_NOREUSE = 0x02, /* throw this away after tracing */
192 CC_TRACE = 0x04,
193 CC_TRACE_SUB = 0x08, /* trace sub calls */
194 CC_TRACE_LINE = 0x10, /* trace each statement */
195 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
196};
197
198/* this is a structure representing a c-level coroutine */
199typedef struct coro_cctx {
200 struct coro_cctx *next;
201
202 /* the stack */
203 void *sptr;
204 size_t ssize;
205
206 /* cpu state */
207 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
208 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
209 JMPENV *top_env;
210 coro_context cctx;
211
212#if CORO_USE_VALGRIND
213 int valgrind_id;
214#endif
215 unsigned char flags;
216} coro_cctx;
217
218enum {
219 CF_RUNNING = 0x0001, /* coroutine is running */
220 CF_READY = 0x0002, /* coroutine is ready */
221 CF_NEW = 0x0004, /* has never been switched to */
222 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
223};
224
225/* the structure where most of the perl state is stored, overlaid on the cxstack */
226typedef struct {
227 SV *defsv;
228 AV *defav;
229 SV *errsv;
230 SV *irsgv;
231#define VAR(name,type) type name;
232# include "state.h"
233#undef VAR
234} perl_slots;
235
236#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
237
238/* this is a structure representing a perl-level coroutine */
23struct coro { 239struct coro {
24 /* the optional C context */ 240 /* the c coroutine allocated to this perl coroutine, if any */
25 coro_context cctx; 241 coro_cctx *cctx;
26 void *sptr;
27 long ssize;
28 242
29 /* optionally saved, might be zero */ 243 /* 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; 244 AV *mainstack;
41 SV **stack_sp; 245 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;
65 246
66 /* data associated with this coroutine (initial args) */ 247 AV *args; /* data associated with this coroutine (initial args) */
67 AV *args; 248 int refcnt; /* coroutines are refcounted, yes */
249 int flags; /* CF_ flags */
250 HV *hv; /* the perl hash associated with this coro, if any */
251
252 /* statistics */
253 int usecount; /* number of transfers to this coro */
254
255 /* coro process data */
256 int prio;
257 SV *throw; /* exception to be thrown */
258
259 /* async_pool */
260 SV *saved_deffh;
261
262 /* linked list */
263 struct coro *next, *prev;
68}; 264};
69 265
70typedef struct coro *Coro__State; 266typedef struct coro *Coro__State;
71typedef struct coro *Coro__State_or_hashref; 267typedef struct coro *Coro__State_or_hashref;
72 268
73static AV *main_mainstack; /* used to differentiate between $main and others */ 269/** Coro ********************************************************************/
74static HV *coro_state_stash;
75static HV *padlist_cache;
76 270
77/* mostly copied from op.c:cv_clone2 */ 271#define PRIO_MAX 3
78STATIC AV * 272#define PRIO_HIGH 1
79clone_padlist (AV *protopadlist) 273#define PRIO_NORMAL 0
274#define PRIO_LOW -1
275#define PRIO_IDLE -3
276#define PRIO_MIN -4
277
278/* for Coro.pm */
279static SV *coro_current;
280static SV *coro_readyhook;
281static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
282static int coro_nready;
283static struct coro *coro_first;
284
285/** lowlevel stuff **********************************************************/
286
287static SV *
288coro_get_sv (pTHX_ const char *name, int create)
80{ 289{
81 AV *av; 290#if PERL_VERSION_ATLEAST (5,10,0)
82 I32 ix; 291 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
83 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE); 292 get_sv (name, create);
84 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE); 293#endif
85 SV **pname = AvARRAY (protopad_name); 294 return get_sv (name, create);
86 SV **ppad = AvARRAY (protopad); 295}
87 I32 fname = AvFILLp (protopad_name); 296
88 I32 fpad = AvFILLp (protopad); 297static AV *
298coro_get_av (pTHX_ const char *name, int create)
299{
300#if PERL_VERSION_ATLEAST (5,10,0)
301 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
302 get_av (name, create);
303#endif
304 return get_av (name, create);
305}
306
307static HV *
308coro_get_hv (pTHX_ const char *name, int create)
309{
310#if PERL_VERSION_ATLEAST (5,10,0)
311 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
312 get_hv (name, create);
313#endif
314 return get_hv (name, create);
315}
316
317static AV *
318coro_clone_padlist (pTHX_ CV *cv)
319{
320 AV *padlist = CvPADLIST (cv);
89 AV *newpadlist, *newpad_name, *newpad; 321 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);
99 322
100 newpadlist = newAV (); 323 newpadlist = newAV ();
101 AvREAL_off (newpadlist); 324 AvREAL_off (newpadlist);
102 av_store (newpadlist, 0, (SV *) newpad_name); 325#if PERL_VERSION_ATLEAST (5,10,0)
326 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
327#else
328 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
329#endif
330 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
331 --AvFILLp (padlist);
332
333 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
103 av_store (newpadlist, 1, (SV *) newpad); 334 av_store (newpadlist, 1, (SV *)newpad);
104 335
105 av = newAV (); /* will be @_ */ 336 return newpadlist;
106 av_extend (av, 0); 337}
107 av_store (newpad, 0, (SV *) av);
108 AvFLAGS (av) = AVf_REIFY;
109 338
110 for (ix = fpad; ix > 0; ix--) 339static void
340free_padlist (pTHX_ AV *padlist)
341{
342 /* may be during global destruction */
343 if (SvREFCNT (padlist))
111 { 344 {
112 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv; 345 I32 i = AvFILLp (padlist);
113 if (namesv && namesv != &PL_sv_undef) 346 while (i >= 0)
114 { 347 {
115 char *name = SvPVX (namesv); /* XXX */ 348 SV **svp = av_fetch (padlist, i--, FALSE);
116 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&') 349 if (svp)
117 { /* lexical from outside? */
118 npad[ix] = SvREFCNT_inc (ppad[ix]);
119 } 350 {
120 else
121 { /* our own lexical */
122 SV *sv; 351 SV *sv;
123 if (*name == '&') 352 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
124 sv = SvREFCNT_inc (ppad[ix]); 353 SvREFCNT_dec (sv);
125 else if (*name == '@') 354
126 sv = (SV *) newAV (); 355 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 } 356 }
135 } 357 }
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 }
147 358
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); 359 SvREFCNT_dec ((SV*)padlist);
188 } 360 }
189} 361}
190#endif 362
363static int
364coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
365{
366 AV *padlist;
367 AV *av = (AV *)mg->mg_obj;
368
369 /* casting is fun. */
370 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
371 free_padlist (aTHX_ padlist);
372
373 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
374
375 return 0;
376}
377
378#define CORO_MAGIC_type_cv PERL_MAGIC_ext
379#define CORO_MAGIC_type_state PERL_MAGIC_ext
380
381static MGVTBL coro_cv_vtbl = {
382 0, 0, 0, 0,
383 coro_cv_free
384};
385
386#define CORO_MAGIC(sv,type) \
387 SvMAGIC (sv) \
388 ? SvMAGIC (sv)->mg_type == type \
389 ? SvMAGIC (sv) \
390 : mg_find (sv, type) \
391 : 0
392
393#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
394#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
395
396static struct coro *
397SvSTATE_ (pTHX_ SV *coro)
398{
399 HV *stash;
400 MAGIC *mg;
401
402 if (SvROK (coro))
403 coro = SvRV (coro);
404
405 if (expect_false (SvTYPE (coro) != SVt_PVHV))
406 croak ("Coro::State object required");
407
408 stash = SvSTASH (coro);
409 if (expect_false (stash != coro_stash && stash != coro_state_stash))
410 {
411 /* very slow, but rare, check */
412 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
413 croak ("Coro::State object required");
414 }
415
416 mg = CORO_MAGIC_state (coro);
417 return (struct coro *)mg->mg_ptr;
418}
419
420#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
191 421
192/* the next two functions merely cache the padlists */ 422/* the next two functions merely cache the padlists */
193STATIC void 423static void
194get_padlist (CV *cv) 424get_padlist (pTHX_ CV *cv)
195{ 425{
196 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0); 426 MAGIC *mg = CORO_MAGIC_cv (cv);
427 AV *av;
197 428
198 if (he && AvFILLp ((AV *)*he) >= 0) 429 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
199 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he); 430 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
200 else 431 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 { 432 {
433#if CORO_PREFER_PERL_FUNCTIONS
434 /* this is probably cleaner? but also slower! */
435 /* in practise, it seems to be less stable */
436 CV *cp = Perl_cv_clone (cv);
437 CvPADLIST (cv) = CvPADLIST (cp);
438 CvPADLIST (cp) = 0;
211 SvREFCNT_dec (*he); 439 SvREFCNT_dec (cp);
212 *he = (SV *)newAV (); 440#else
441 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
442#endif
213 } 443 }
214
215 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
216} 444}
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
251 445
252static void 446static void
447put_padlist (pTHX_ CV *cv)
448{
449 MAGIC *mg = CORO_MAGIC_cv (cv);
450 AV *av;
451
452 if (expect_false (!mg))
453 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
454
455 av = (AV *)mg->mg_obj;
456
457 if (expect_false (AvFILLp (av) >= AvMAX (av)))
458 av_extend (av, AvMAX (av) + 1);
459
460 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
461}
462
463/** load & save, init *******************************************************/
464
465static void
253load_state(pTHX_ Coro__State c) 466load_perl (pTHX_ Coro__State c)
254{ 467{
255 PL_dowarn = c->dowarn; 468 perl_slots *slot = c->slot;
469 c->slot = 0;
256 470
257 PL_curstackinfo = c->curstackinfo;
258 PL_curstack = c->curstack;
259 PL_mainstack = c->mainstack; 471 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;
284 472
285 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav); 473 GvSV (PL_defgv) = slot->defsv;
286 if (c->defsv) REPLACE_SV (DEFSV , c->defsv); 474 GvAV (PL_defgv) = slot->defav;
287 if (c->errsv) REPLACE_SV (ERRSV , c->errsv); 475 GvSV (PL_errgv) = slot->errsv;
476 GvSV (irsgv) = slot->irsgv;
477
478 #define VAR(name,type) PL_ ## name = slot->name;
479 # include "state.h"
480 #undef VAR
288 481
289 { 482 {
290 dSP; 483 dSP;
484
291 CV *cv; 485 CV *cv;
292 486
293 /* now do the ugly restore mess */ 487 /* now do the ugly restore mess */
294 while ((cv = (CV *)POPs)) 488 while (expect_true (cv = (CV *)POPs))
295 { 489 {
296 AV *padlist = (AV *)POPs;
297
298 if (padlist)
299 {
300 put_padlist (cv); /* mark this padlist as available */ 490 put_padlist (aTHX_ cv); /* mark this padlist as available */
301 CvPADLIST(cv) = padlist; 491 CvDEPTH (cv) = PTR2IV (POPs);
302#ifdef USE_THREADS 492 CvPADLIST (cv) = (AV *)POPs;
303 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
304#endif
305 }
306
307 ++CvDEPTH(cv);
308 } 493 }
309 494
310 PUTBACK; 495 PUTBACK;
311 } 496 }
312} 497}
313 498
314static void 499static void
315save_state(pTHX_ Coro__State c, int flags) 500save_perl (pTHX_ Coro__State c)
316{ 501{
317 { 502 {
318 dSP; 503 dSP;
319 I32 cxix = cxstack_ix; 504 I32 cxix = cxstack_ix;
320 PERL_CONTEXT *ccstk = cxstack; 505 PERL_CONTEXT *ccstk = cxstack;
… …
323 /* 508 /*
324 * the worst thing you can imagine happens first - we have to save 509 * the worst thing you can imagine happens first - we have to save
325 * (and reinitialize) all cv's in the whole callchain :( 510 * (and reinitialize) all cv's in the whole callchain :(
326 */ 511 */
327 512
328 PUSHs (Nullsv); 513 XPUSHs (Nullsv);
329 /* this loop was inspired by pp_caller */ 514 /* this loop was inspired by pp_caller */
330 for (;;) 515 for (;;)
331 { 516 {
332 do 517 while (expect_true (cxix >= 0))
333 { 518 {
334 PERL_CONTEXT *cx = &ccstk[cxix--]; 519 PERL_CONTEXT *cx = &ccstk[cxix--];
335 520
336 if (CxTYPE(cx) == CXt_SUB) 521 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
337 { 522 {
338 CV *cv = cx->blk_sub.cv; 523 CV *cv = cx->blk_sub.cv;
524
339 if (CvDEPTH(cv)) 525 if (expect_true (CvDEPTH (cv)))
340 { 526 {
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); 527 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)); 528 PUSHs ((SV *)CvPADLIST (cv));
529 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
356 PUSHs ((SV *)cv); 530 PUSHs ((SV *)cv);
357 531
358 get_padlist (cv); /* this is a monster */ 532 CvDEPTH (cv) = 0;
533 get_padlist (aTHX_ cv);
359 } 534 }
360 } 535 }
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 } 536 }
368 while (cxix >= 0);
369 537
370 if (top_si->si_type == PERLSI_MAIN) 538 if (expect_true (top_si->si_type == PERLSI_MAIN))
371 break; 539 break;
372 540
373 top_si = top_si->si_prev; 541 top_si = top_si->si_prev;
374 ccstk = top_si->si_cxstack; 542 ccstk = top_si->si_cxstack;
375 cxix = top_si->si_cxix; 543 cxix = top_si->si_cxix;
376 } 544 }
377 545
378 PUTBACK; 546 PUTBACK;
379 } 547 }
380 548
381 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0; 549 /* allocate some space on the context stack for our purposes */
382 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0; 550 /* we manually unroll here, as usually 2 slots is enough */
383 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0; 551 if (SLOT_COUNT >= 1) CXINC;
552 if (SLOT_COUNT >= 2) CXINC;
553 if (SLOT_COUNT >= 3) CXINC;
554 {
555 int i;
556 for (i = 3; i < SLOT_COUNT; ++i)
557 CXINC;
558 }
559 cxstack_ix -= SLOT_COUNT; /* undo allocation */
384 560
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; 561 c->mainstack = PL_mainstack;
395 c->stack_sp = PL_stack_sp; 562
396 c->op = PL_op; 563 {
397 c->curpad = PL_curpad; 564 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
398 c->stack_base = PL_stack_base; 565
399 c->stack_max = PL_stack_max; 566 slot->defav = GvAV (PL_defgv);
400 c->tmps_stack = PL_tmps_stack; 567 slot->defsv = DEFSV;
401 c->tmps_floor = PL_tmps_floor; 568 slot->errsv = ERRSV;
402 c->tmps_ix = PL_tmps_ix; 569 slot->irsgv = GvSV (irsgv);
403 c->tmps_max = PL_tmps_max; 570
404 c->markstack = PL_markstack; 571 #define VAR(name,type) slot->name = PL_ ## name;
405 c->markstack_ptr = PL_markstack_ptr; 572 # include "state.h"
406 c->markstack_max = PL_markstack_max; 573 #undef VAR
407 c->scopestack = PL_scopestack; 574 }
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} 575}
420 576
421/* 577/*
422 * allocate various perl stacks. This is an exact copy 578 * allocate various perl stacks. This is an exact copy
423 * of perl.c:init_stacks, except that it uses less memory 579 * of perl.c:init_stacks, except that it uses less memory
424 * on the assumption that coroutines do not usually need 580 * on the (sometimes correct) assumption that coroutines do
425 * a lot of stackspace. 581 * not usually need a lot of stackspace.
426 */ 582 */
427STATIC void 583#if CORO_PREFER_PERL_FUNCTIONS
584# define coro_init_stacks init_stacks
585#else
586static void
428coro_init_stacks (pTHX) 587coro_init_stacks (pTHX)
429{ 588{
430 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1); 589 PL_curstackinfo = new_stackinfo(32, 8);
431 PL_curstackinfo->si_type = PERLSI_MAIN; 590 PL_curstackinfo->si_type = PERLSI_MAIN;
432 PL_curstack = PL_curstackinfo->si_stack; 591 PL_curstack = PL_curstackinfo->si_stack;
433 PL_mainstack = PL_curstack; /* remember in case we switch stacks */ 592 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
434 593
435 PL_stack_base = AvARRAY(PL_curstack); 594 PL_stack_base = AvARRAY(PL_curstack);
436 PL_stack_sp = PL_stack_base; 595 PL_stack_sp = PL_stack_base;
437 PL_stack_max = PL_stack_base + AvMAX(PL_curstack); 596 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
438 597
439 New(50,PL_tmps_stack,64,SV*); 598 New(50,PL_tmps_stack,32,SV*);
440 PL_tmps_floor = -1; 599 PL_tmps_floor = -1;
441 PL_tmps_ix = -1; 600 PL_tmps_ix = -1;
442 PL_tmps_max = 64; 601 PL_tmps_max = 32;
443 602
444 New(54,PL_markstack,12,I32); 603 New(54,PL_markstack,16,I32);
445 PL_markstack_ptr = PL_markstack; 604 PL_markstack_ptr = PL_markstack;
446 PL_markstack_max = PL_markstack + 12; 605 PL_markstack_max = PL_markstack + 16;
447 606
607#ifdef SET_MARK_OFFSET
448 SET_MARK_OFFSET; 608 SET_MARK_OFFSET;
609#endif
449 610
450 New(54,PL_scopestack,12,I32); 611 New(54,PL_scopestack,8,I32);
451 PL_scopestack_ix = 0; 612 PL_scopestack_ix = 0;
452 PL_scopestack_max = 12; 613 PL_scopestack_max = 8;
453 614
454 New(54,PL_savestack,64,ANY); 615 New(54,PL_savestack,24,ANY);
455 PL_savestack_ix = 0; 616 PL_savestack_ix = 0;
456 PL_savestack_max = 64; 617 PL_savestack_max = 24;
457 618
619#if !PERL_VERSION_ATLEAST (5,10,0)
458 New(54,PL_retstack,8,OP*); 620 New(54,PL_retstack,4,OP*);
459 PL_retstack_ix = 0; 621 PL_retstack_ix = 0;
460 PL_retstack_max = 8; 622 PL_retstack_max = 4;
623#endif
461} 624}
625#endif
462 626
463/* 627/*
464 * destroy the stacks, the callchain etc... 628 * destroy the stacks, the callchain etc...
465 * still there is a memleak of 128 bytes...
466 */ 629 */
467STATIC void 630static void
468destroy_stacks(pTHX) 631coro_destroy_stacks (pTHX)
469{ 632{
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) 633 while (PL_curstackinfo->si_next)
479 PL_curstackinfo = PL_curstackinfo->si_next; 634 PL_curstackinfo = PL_curstackinfo->si_next;
480 635
481 while (PL_curstackinfo) 636 while (PL_curstackinfo)
482 { 637 {
483 PERL_SI *p = PL_curstackinfo->si_prev; 638 PERL_SI *p = PL_curstackinfo->si_prev;
484 639
485 { 640 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); 641 SvREFCNT_dec (PL_curstackinfo->si_stack);
642
494 Safefree(PL_curstackinfo->si_cxstack); 643 Safefree (PL_curstackinfo->si_cxstack);
495 Safefree(PL_curstackinfo); 644 Safefree (PL_curstackinfo);
496 PL_curstackinfo = p; 645 PL_curstackinfo = p;
497 } 646 }
498 647
499 Safefree(PL_tmps_stack); 648 Safefree (PL_tmps_stack);
500 Safefree(PL_markstack); 649 Safefree (PL_markstack);
501 Safefree(PL_scopestack); 650 Safefree (PL_scopestack);
502 Safefree(PL_savestack); 651 Safefree (PL_savestack);
652#if !PERL_VERSION_ATLEAST (5,10,0)
503 Safefree(PL_retstack); 653 Safefree (PL_retstack);
654#endif
655}
656
657static size_t
658coro_rss (pTHX_ struct coro *coro)
659{
660 size_t rss = sizeof (*coro);
661
662 if (coro->mainstack)
663 {
664 perl_slots tmp_slot;
665 perl_slots *slot;
666
667 if (coro->flags & CF_RUNNING)
668 {
669 slot = &tmp_slot;
670
671 #define VAR(name,type) slot->name = PL_ ## name;
672 # include "state.h"
673 #undef VAR
674 }
675 else
676 slot = coro->slot;
677
678 if (slot)
679 {
680 rss += sizeof (slot->curstackinfo);
681 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
682 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
683 rss += slot->tmps_max * sizeof (SV *);
684 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
685 rss += slot->scopestack_max * sizeof (I32);
686 rss += slot->savestack_max * sizeof (ANY);
687
688#if !PERL_VERSION_ATLEAST (5,10,0)
689 rss += slot->retstack_max * sizeof (OP *);
690#endif
691 }
692 }
693
694 return rss;
695}
696
697/** coroutine stack handling ************************************************/
698
699static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
700static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
701static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
702
703/* apparently < 5.8.8 */
704#ifndef MgPV_nolen_const
705#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
706 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
707 (const char*)(mg)->mg_ptr)
708#endif
709
710/*
711 * This overrides the default magic get method of %SIG elements.
712 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
713 * and instead of tryign to save and restore the hash elements, we just provide
714 * readback here.
715 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
716 * not expecting this to actually change the hook. This is a potential problem
717 * when a schedule happens then, but we ignore this.
718 */
719static int
720coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
721{
722 const char *s = MgPV_nolen_const (mg);
723
724 if (*s == '_')
725 {
726 SV **svp = 0;
727
728 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
729 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
730
731 if (svp)
732 {
733 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
734 return 0;
735 }
736 }
737
738 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
739}
740
741static int
742coro_sigelem_clr (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 *old = *svp;
756 *svp = 0;
757 SvREFCNT_dec (old);
758 return 0;
759 }
760 }
761
762 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
763}
764
765static int
766coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
767{
768 const char *s = MgPV_nolen_const (mg);
769
770 if (*s == '_')
771 {
772 SV **svp = 0;
773
774 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
775 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
776
777 if (svp)
778 {
779 SV *old = *svp;
780 *svp = newSVsv (sv);
781 SvREFCNT_dec (old);
782 return 0;
783 }
784 }
785
786 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
504} 787}
505 788
506static void 789static void
507allocate_stack (Coro__State ctx) 790coro_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{ 791{
535 /* 792 /*
536 * emulate part of the perl startup here. 793 * emulate part of the perl startup here.
537 */ 794 */
795 coro_init_stacks (aTHX);
796
797 PL_runops = RUNOPS_DEFAULT;
798 PL_curcop = &PL_compiling;
799 PL_in_eval = EVAL_NULL;
800 PL_comppad = 0;
801 PL_curpm = 0;
802 PL_curpad = 0;
803 PL_localizing = 0;
804 PL_dirty = 0;
805 PL_restartop = 0;
806#if PERL_VERSION_ATLEAST (5,10,0)
807 PL_parser = 0;
808#endif
809
810 /* recreate the die/warn hooks */
811 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
812 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
813
814 GvSV (PL_defgv) = newSV (0);
815 GvAV (PL_defgv) = coro->args; coro->args = 0;
816 GvSV (PL_errgv) = newSV (0);
817 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
818 PL_rs = newSVsv (GvSV (irsgv));
819 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
820
821 {
822 dSP;
823 LOGOP myop;
824
825 Zero (&myop, 1, LOGOP);
826 myop.op_next = Nullop;
827 myop.op_flags = OPf_WANT_VOID;
828
829 PUSHMARK (SP);
830 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
831 PUTBACK;
832 PL_op = (OP *)&myop;
833 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
834 SPAGAIN;
835 }
836
837 /* this newly created coroutine might be run on an existing cctx which most
838 * likely was suspended in set_stacklevel, called from entersub.
839 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
840 * so we ENTER here for symmetry
841 */
842 ENTER;
843}
844
845static void
846coro_destroy (pTHX_ struct coro *coro)
847{
848 if (!IN_DESTRUCT)
849 {
850 /* restore all saved variables and stuff */
851 LEAVE_SCOPE (0);
852 assert (PL_tmps_floor == -1);
853
854 /* free all temporaries */
855 FREETMPS;
856 assert (PL_tmps_ix == -1);
857
858 /* unwind all extra stacks */
859 POPSTACK_TO (PL_mainstack);
860
861 /* unwind main stack */
862 dounwind (-1);
863 }
864
865 SvREFCNT_dec (GvSV (PL_defgv));
866 SvREFCNT_dec (GvAV (PL_defgv));
867 SvREFCNT_dec (GvSV (PL_errgv));
868 SvREFCNT_dec (PL_defoutgv);
869 SvREFCNT_dec (PL_rs);
870 SvREFCNT_dec (GvSV (irsgv));
871
872 SvREFCNT_dec (PL_diehook);
873 SvREFCNT_dec (PL_warnhook);
874
875 SvREFCNT_dec (coro->saved_deffh);
876 SvREFCNT_dec (coro->throw);
877
878 coro_destroy_stacks (aTHX);
879}
880
881static void
882free_coro_mortal (pTHX)
883{
884 if (expect_true (coro_mortal))
885 {
886 SvREFCNT_dec (coro_mortal);
887 coro_mortal = 0;
888 }
889}
890
891static int
892runops_trace (pTHX)
893{
894 COP *oldcop = 0;
895 int oldcxix = -2;
896 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
897 coro_cctx *cctx = coro->cctx;
898
899 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
900 {
901 PERL_ASYNC_CHECK ();
902
903 if (cctx->flags & CC_TRACE_ALL)
904 {
905 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
906 {
907 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
908 SV **bot, **top;
909 AV *av = newAV (); /* return values */
910 SV **cb;
911 dSP;
912
913 GV *gv = CvGV (cx->blk_sub.cv);
914 SV *fullname = sv_2mortal (newSV (0));
915 if (isGV (gv))
916 gv_efullname3 (fullname, gv, 0);
917
918 bot = PL_stack_base + cx->blk_oldsp + 1;
919 top = cx->blk_gimme == G_ARRAY ? SP + 1
920 : cx->blk_gimme == G_SCALAR ? bot + 1
921 : bot;
922
923 av_extend (av, top - bot);
924 while (bot < top)
925 av_push (av, SvREFCNT_inc_NN (*bot++));
926
927 PL_runops = RUNOPS_DEFAULT;
928 ENTER;
929 SAVETMPS;
930 EXTEND (SP, 3);
931 PUSHMARK (SP);
932 PUSHs (&PL_sv_no);
933 PUSHs (fullname);
934 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
935 PUTBACK;
936 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
937 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
938 SPAGAIN;
939 FREETMPS;
940 LEAVE;
941 PL_runops = runops_trace;
942 }
943
944 if (oldcop != PL_curcop)
945 {
946 oldcop = PL_curcop;
947
948 if (PL_curcop != &PL_compiling)
949 {
950 SV **cb;
951
952 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
953 {
954 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
955
956 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
957 {
958 runops_proc_t old_runops = PL_runops;
959 dSP;
960 GV *gv = CvGV (cx->blk_sub.cv);
961 SV *fullname = sv_2mortal (newSV (0));
962
963 if (isGV (gv))
964 gv_efullname3 (fullname, gv, 0);
965
966 PL_runops = RUNOPS_DEFAULT;
967 ENTER;
968 SAVETMPS;
969 EXTEND (SP, 3);
970 PUSHMARK (SP);
971 PUSHs (&PL_sv_yes);
972 PUSHs (fullname);
973 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
974 PUTBACK;
975 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
976 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
977 SPAGAIN;
978 FREETMPS;
979 LEAVE;
980 PL_runops = runops_trace;
981 }
982
983 oldcxix = cxstack_ix;
984 }
985
986 if (cctx->flags & CC_TRACE_LINE)
987 {
988 dSP;
989
990 PL_runops = RUNOPS_DEFAULT;
991 ENTER;
992 SAVETMPS;
993 EXTEND (SP, 3);
994 PL_runops = RUNOPS_DEFAULT;
995 PUSHMARK (SP);
996 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
997 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
998 PUTBACK;
999 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1000 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1001 SPAGAIN;
1002 FREETMPS;
1003 LEAVE;
1004 PL_runops = runops_trace;
1005 }
1006 }
1007 }
1008 }
1009 }
1010
1011 TAINT_NOT;
1012 return 0;
1013}
1014
1015/* inject a fake call to Coro::State::_cctx_init into the execution */
1016/* _cctx_init should be careful, as it could be called at almost any time */
1017/* during execution of a perl program */
1018static void NOINLINE
1019cctx_prepare (pTHX_ coro_cctx *cctx)
1020{
538 dSP; 1021 dSP;
539 Coro__State ctx = (Coro__State)arg; 1022 LOGOP myop;
540 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
541 1023
542 coro_init_stacks (aTHX); 1024 PL_top_env = &PL_start_env;
543 JMPENV_BOOTSTRAP; 1025
1026 if (cctx->flags & CC_TRACE)
1027 PL_runops = runops_trace;
1028
1029 Zero (&myop, 1, LOGOP);
1030 myop.op_next = PL_op;
1031 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1032
1033 PUSHMARK (SP);
1034 EXTEND (SP, 2);
1035 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
1036 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1037 PUTBACK;
1038 PL_op = (OP *)&myop;
1039 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
544 SPAGAIN; 1040 SPAGAIN;
1041}
545 1042
546 /*PL_curcop = 0;*/ 1043/*
547 SvREFCNT_dec (GvAV (PL_defgv)); 1044 * this is a _very_ stripped down perl interpreter ;)
548 GvAV (PL_defgv) = ctx->args; 1045 */
1046static void
1047cctx_run (void *arg)
1048{
1049 dTHX;
549 1050
1051 /* cctx_run is the alternative tail of transfer(), so unlock here. */
1052 UNLOCK;
1053
1054 /* we now skip the entersub that lead to transfer() */
1055 PL_op = PL_op->op_next;
1056
1057 /* inject a fake subroutine call to cctx_init */
1058 cctx_prepare (aTHX_ (coro_cctx *)arg);
1059
1060 /* somebody or something will hit me for both perl_run and PL_restartop */
1061 PL_restartop = PL_op;
1062 perl_run (PL_curinterp);
1063
1064 /*
1065 * If perl-run returns we assume exit() was being called or the coro
1066 * fell off the end, which seems to be the only valid (non-bug)
1067 * reason for perl_run to return. We try to exit by jumping to the
1068 * bootstrap-time "top" top_env, as we cannot restore the "main"
1069 * coroutine as Coro has no such concept
1070 */
1071 PL_top_env = main_top_env;
1072 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1073}
1074
1075static coro_cctx *
1076cctx_new ()
1077{
1078 coro_cctx *cctx;
1079 void *stack_start;
1080 size_t stack_size;
1081
1082 ++cctx_count;
1083
1084 Newz (0, cctx, 1, coro_cctx);
1085
1086#if HAVE_MMAP
1087 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1088 /* mmap supposedly does allocate-on-write for us */
1089 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1090
1091 if (cctx->sptr != (void *)-1)
1092 {
1093# if CORO_STACKGUARD
1094 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1095# endif
1096 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
1097 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1098 cctx->flags |= CC_MAPPED;
1099 }
1100 else
1101#endif
1102 {
1103 cctx->ssize = coro_stacksize * (long)sizeof (long);
1104 New (0, cctx->sptr, coro_stacksize, long);
1105
550 if (ctx->sptr) 1106 if (!cctx->sptr)
1107 {
1108 perror ("FATAL: unable to allocate stack for coroutine");
1109 _exit (EXIT_FAILURE);
1110 }
1111
1112 stack_start = cctx->sptr;
1113 stack_size = cctx->ssize;
551 { 1114 }
1115
1116 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1117 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1118
1119 return cctx;
1120}
1121
1122static void
1123cctx_destroy (coro_cctx *cctx)
1124{
1125 if (!cctx)
1126 return;
1127
1128 --cctx_count;
1129
1130#if CORO_USE_VALGRIND
1131 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1132#endif
1133
1134#if HAVE_MMAP
1135 if (cctx->flags & CC_MAPPED)
1136 munmap (cctx->sptr, cctx->ssize);
1137 else
1138#endif
1139 Safefree (cctx->sptr);
1140
1141 Safefree (cctx);
1142}
1143
1144/* wether this cctx should be destructed */
1145#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
1146
1147static coro_cctx *
1148cctx_get (pTHX)
1149{
1150 while (expect_true (cctx_first))
1151 {
1152 coro_cctx *cctx = cctx_first;
1153 cctx_first = cctx->next;
1154 --cctx_idle;
1155
1156 if (expect_true (!CCTX_EXPIRED (cctx)))
1157 return cctx;
1158
1159 cctx_destroy (cctx);
1160 }
1161
1162 return cctx_new ();
1163}
1164
1165static void
1166cctx_put (coro_cctx *cctx)
1167{
1168 /* free another cctx if overlimit */
1169 if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
1170 {
1171 coro_cctx *first = cctx_first;
1172 cctx_first = first->next;
1173 --cctx_idle;
1174
1175 cctx_destroy (first);
1176 }
1177
1178 ++cctx_idle;
1179 cctx->next = cctx_first;
1180 cctx_first = cctx;
1181}
1182
1183/** coroutine switching *****************************************************/
1184
1185static void
1186transfer_check (pTHX_ struct coro *prev, struct coro *next)
1187{
1188 if (expect_true (prev != next))
1189 {
1190 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1191 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1192
1193 if (expect_false (next->flags & CF_RUNNING))
1194 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1195
1196 if (expect_false (next->flags & CF_DESTROYED))
1197 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1198
1199#if !PERL_VERSION_ATLEAST (5,10,0)
1200 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1201 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1202#endif
1203 }
1204}
1205
1206/* always use the TRANSFER macro */
1207static void NOINLINE
1208transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1209{
1210 dSTACKLEVEL;
1211 static volatile int has_throw;
1212
1213 /* sometimes transfer is only called to set idle_sp */
1214 if (expect_false (!next))
1215 {
1216 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1217 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1218 }
1219 else if (expect_true (prev != next))
1220 {
1221 coro_cctx *prev__cctx;
1222
1223 if (expect_false (prev->flags & CF_NEW))
1224 {
1225 /* create a new empty context */
1226 Newz (0, prev->cctx, 1, coro_cctx);
1227 prev->flags &= ~CF_NEW;
1228 prev->flags |= CF_RUNNING;
1229 }
1230
1231 prev->flags &= ~CF_RUNNING;
1232 next->flags |= CF_RUNNING;
1233
1234 LOCK;
1235
1236 /* first get rid of the old state */
1237 save_perl (aTHX_ prev);
1238
1239 if (expect_false (next->flags & CF_NEW))
1240 {
1241 /* need to start coroutine */
1242 next->flags &= ~CF_NEW;
1243 /* setup coroutine call */
1244 coro_setup (aTHX_ next);
1245 }
1246 else
1247 load_perl (aTHX_ next);
1248
1249 prev__cctx = prev->cctx;
1250
1251 /* possibly "free" the cctx */
1252 if (expect_true (
1253 prev__cctx->idle_sp == STACKLEVEL
1254 && !(prev__cctx->flags & CC_TRACE)
1255 && !force_cctx
1256 ))
1257 {
1258 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1259 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
1260
1261 prev->cctx = 0;
1262
1263 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1264 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1265 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1266 if (!next->cctx)
1267 next->cctx = cctx_get (aTHX);
1268
1269 cctx_put (prev__cctx);
1270 }
1271
1272 ++next->usecount;
1273
1274 if (expect_true (!next->cctx))
1275 next->cctx = cctx_get (aTHX);
1276
1277 has_throw = !!next->throw;
1278
1279 if (expect_false (prev__cctx != next->cctx))
1280 {
1281 prev__cctx->top_env = PL_top_env;
1282 PL_top_env = next->cctx->top_env;
1283 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1284 }
1285
1286 free_coro_mortal (aTHX);
1287 UNLOCK;
1288
1289 if (expect_false (has_throw))
1290 {
1291 struct coro *coro = SvSTATE (coro_current);
1292
1293 if (coro->throw)
1294 {
1295 SV *exception = coro->throw;
1296 coro->throw = 0;
1297 sv_setsv (ERRSV, exception);
1298 croak (0);
1299 }
1300 }
1301 }
1302}
1303
1304struct transfer_args
1305{
1306 struct coro *prev, *next;
1307};
1308
1309#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1310#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1311
1312/** high level stuff ********************************************************/
1313
1314static int
1315coro_state_destroy (pTHX_ struct coro *coro)
1316{
1317 if (coro->flags & CF_DESTROYED)
1318 return 0;
1319
1320 coro->flags |= CF_DESTROYED;
1321
1322 if (coro->flags & CF_READY)
1323 {
1324 /* reduce nready, as destroying a ready coro effectively unreadies it */
1325 /* alternative: look through all ready queues and remove the coro */
1326 LOCK;
1327 --coro_nready;
1328 UNLOCK;
1329 }
1330 else
1331 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1332
1333 if (coro->mainstack && coro->mainstack != main_mainstack)
1334 {
1335 struct coro temp;
1336
1337 if (coro->flags & CF_RUNNING)
1338 croak ("FATAL: tried to destroy currently running coroutine");
1339
1340 save_perl (aTHX_ &temp);
1341 load_perl (aTHX_ coro);
1342
1343 coro_destroy (aTHX_ coro);
1344
1345 load_perl (aTHX_ &temp);
1346
1347 coro->slot = 0;
1348 }
1349
1350 cctx_destroy (coro->cctx);
1351 SvREFCNT_dec (coro->args);
1352
1353 if (coro->next) coro->next->prev = coro->prev;
1354 if (coro->prev) coro->prev->next = coro->next;
1355 if (coro == coro_first) coro_first = coro->next;
1356
1357 return 1;
1358}
1359
1360static int
1361coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1362{
1363 struct coro *coro = (struct coro *)mg->mg_ptr;
1364 mg->mg_ptr = 0;
1365
1366 coro->hv = 0;
1367
1368 if (--coro->refcnt < 0)
1369 {
1370 coro_state_destroy (aTHX_ coro);
1371 Safefree (coro);
1372 }
1373
1374 return 0;
1375}
1376
1377static int
1378coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1379{
1380 struct coro *coro = (struct coro *)mg->mg_ptr;
1381
1382 ++coro->refcnt;
1383
1384 return 0;
1385}
1386
1387static MGVTBL coro_state_vtbl = {
1388 0, 0, 0, 0,
1389 coro_state_free,
1390 0,
1391#ifdef MGf_DUP
1392 coro_state_dup,
1393#else
1394# define MGf_DUP 0
1395#endif
1396};
1397
1398static void
1399prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1400{
1401 ta->prev = SvSTATE (prev_sv);
1402 ta->next = SvSTATE (next_sv);
1403 TRANSFER_CHECK (*ta);
1404}
1405
1406static void
1407api_transfer (SV *prev_sv, SV *next_sv)
1408{
1409 dTHX;
1410 struct transfer_args ta;
1411
1412 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1413 TRANSFER (ta, 1);
1414}
1415
1416/** Coro ********************************************************************/
1417
1418static void
1419coro_enq (pTHX_ SV *coro_sv)
1420{
1421 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1422}
1423
1424static SV *
1425coro_deq (pTHX)
1426{
1427 int prio;
1428
1429 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1430 if (AvFILLp (coro_ready [prio]) >= 0)
1431 return av_shift (coro_ready [prio]);
1432
1433 return 0;
1434}
1435
1436static int
1437api_ready (SV *coro_sv)
1438{
1439 dTHX;
1440 struct coro *coro;
1441 SV *sv_hook;
1442 void (*xs_hook)(void);
1443
1444 if (SvROK (coro_sv))
1445 coro_sv = SvRV (coro_sv);
1446
1447 coro = SvSTATE (coro_sv);
1448
1449 if (coro->flags & CF_READY)
1450 return 0;
1451
1452 coro->flags |= CF_READY;
1453
1454 LOCK;
1455
1456 sv_hook = coro_nready ? 0 : coro_readyhook;
1457 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1458
1459 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1460 ++coro_nready;
1461
1462 UNLOCK;
1463
1464 if (sv_hook)
1465 {
1466 dSP;
1467
1468 ENTER;
1469 SAVETMPS;
1470
552 PUSHMARK(SP); 1471 PUSHMARK (SP);
553 PUTBACK; 1472 PUTBACK;
554 (void) call_sv (sub_init, G_VOID|G_NOARGS); 1473 call_sv (sv_hook, G_DISCARD);
555 croak ("FATAL: CCTXT coroutine returned!"); 1474 SPAGAIN;
1475
1476 FREETMPS;
1477 LEAVE;
1478 }
1479
1480 if (xs_hook)
1481 xs_hook ();
1482
1483 return 1;
1484}
1485
1486static int
1487api_is_ready (SV *coro_sv)
1488{
1489 dTHX;
1490 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1491}
1492
1493static void
1494prepare_schedule (pTHX_ struct transfer_args *ta)
1495{
1496 SV *prev_sv, *next_sv;
1497
1498 for (;;)
1499 {
1500 LOCK;
1501 next_sv = coro_deq (aTHX);
1502
1503 /* nothing to schedule: call the idle handler */
1504 if (expect_false (!next_sv))
1505 {
1506 dSP;
1507 UNLOCK;
1508
1509 ENTER;
1510 SAVETMPS;
1511
1512 PUSHMARK (SP);
1513 PUTBACK;
1514 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1515 SPAGAIN;
1516
1517 FREETMPS;
1518 LEAVE;
1519 continue;
1520 }
1521
1522 ta->next = SvSTATE (next_sv);
1523
1524 /* cannot transfer to destroyed coros, skip and look for next */
1525 if (expect_false (ta->next->flags & CF_DESTROYED))
1526 {
1527 UNLOCK;
1528 SvREFCNT_dec (next_sv);
1529 /* coro_nready is already taken care of by destroy */
1530 continue;
1531 }
1532
1533 --coro_nready;
1534 UNLOCK;
1535 break;
1536 }
1537
1538 /* free this only after the transfer */
1539 prev_sv = SvRV (coro_current);
1540 ta->prev = SvSTATE (prev_sv);
1541 TRANSFER_CHECK (*ta);
1542 assert (ta->next->flags & CF_READY);
1543 ta->next->flags &= ~CF_READY;
1544 SvRV_set (coro_current, next_sv);
1545
1546 LOCK;
1547 free_coro_mortal (aTHX);
1548 coro_mortal = prev_sv;
1549 UNLOCK;
1550}
1551
1552static void
1553prepare_cede (pTHX_ struct transfer_args *ta)
1554{
1555 api_ready (coro_current);
1556 prepare_schedule (aTHX_ ta);
1557}
1558
1559static int
1560prepare_cede_notself (pTHX_ struct transfer_args *ta)
1561{
1562 if (coro_nready)
1563 {
1564 SV *prev = SvRV (coro_current);
1565 prepare_schedule (aTHX_ ta);
1566 api_ready (prev);
1567 return 1;
556 } 1568 }
557 else 1569 else
558 { 1570 return 0;
559 UNOP myop; 1571}
560 1572
561 PL_op = (OP *)&myop; 1573static void
1574api_schedule (void)
1575{
1576 dTHX;
1577 struct transfer_args ta;
562 1578
563 Zero(&myop, 1, UNOP); 1579 prepare_schedule (aTHX_ &ta);
564 myop.op_next = Nullop; 1580 TRANSFER (ta, 1);
565 myop.op_flags = OPf_WANT_VOID; 1581}
566 1582
567 PUSHMARK(SP); 1583static int
568 XPUSHs (sub_init); 1584api_cede (void)
569 /* 1585{
570 * the next line is slightly wrong, as PL_op->op_next 1586 dTHX;
571 * is actually being executed so we skip the first op. 1587 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 1588
580 ENTER; /* necessary e.g. for dounwind */ 1589 prepare_cede (aTHX_ &ta);
1590
1591 if (expect_true (ta.prev != ta.next))
581 } 1592 {
582} 1593 TRANSFER (ta, 1);
583 1594 return 1;
584STATIC void
585transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
586{
587 dSP;
588
589 if (prev != next)
590 { 1595 }
591 /* 1596 else
592 * this could be done in newprocess which would lead to 1597 return 0;
593 * extremely elegant and fast (basically just SAVE/LOAD) 1598}
594 * code here, but lazy allocation of stacks has also 1599
595 * some virtues and the overhead of the if() is nil. 1600static int
596 */ 1601api_cede_notself (void)
597 if (next->mainstack) 1602{
1603 dTHX;
1604 struct transfer_args ta;
1605
1606 if (prepare_cede_notself (aTHX_ &ta))
1607 {
1608 TRANSFER (ta, 1);
1609 return 1;
1610 }
1611 else
1612 return 0;
1613}
1614
1615static void
1616api_trace (SV *coro_sv, int flags)
1617{
1618 dTHX;
1619 struct coro *coro = SvSTATE (coro_sv);
1620
1621 if (flags & CC_TRACE)
1622 {
1623 if (!coro->cctx)
1624 coro->cctx = cctx_new ();
1625 else if (!(coro->cctx->flags & CC_TRACE))
1626 croak ("cannot enable tracing on coroutine with custom stack");
1627
1628 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1629 }
1630 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1631 {
1632 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1633
1634 if (coro->flags & CF_RUNNING)
1635 PL_runops = RUNOPS_DEFAULT;
1636 else
1637 coro->slot->runops = RUNOPS_DEFAULT;
1638 }
1639}
1640
1641static int
1642coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1643{
1644 AV *padlist;
1645 AV *av = (AV *)mg->mg_obj;
1646
1647 abort ();
1648
1649 return 0;
1650}
1651
1652static MGVTBL coro_gensub_vtbl = {
1653 0, 0, 0, 0,
1654 coro_gensub_free
1655};
1656
1657/*****************************************************************************/
1658/* PerlIO::cede */
1659
1660typedef struct
1661{
1662 PerlIOBuf base;
1663 NV next, every;
1664} PerlIOCede;
1665
1666static IV
1667PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1668{
1669 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1670
1671 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1672 self->next = nvtime () + self->every;
1673
1674 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1675}
1676
1677static SV *
1678PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1679{
1680 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1681
1682 return newSVnv (self->every);
1683}
1684
1685static IV
1686PerlIOCede_flush (pTHX_ PerlIO *f)
1687{
1688 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1689 double now = nvtime ();
1690
1691 if (now >= self->next)
1692 {
1693 api_cede ();
1694 self->next = now + self->every;
1695 }
1696
1697 return PerlIOBuf_flush (aTHX_ f);
1698}
1699
1700static PerlIO_funcs PerlIO_cede =
1701{
1702 sizeof(PerlIO_funcs),
1703 "cede",
1704 sizeof(PerlIOCede),
1705 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1706 PerlIOCede_pushed,
1707 PerlIOBuf_popped,
1708 PerlIOBuf_open,
1709 PerlIOBase_binmode,
1710 PerlIOCede_getarg,
1711 PerlIOBase_fileno,
1712 PerlIOBuf_dup,
1713 PerlIOBuf_read,
1714 PerlIOBuf_unread,
1715 PerlIOBuf_write,
1716 PerlIOBuf_seek,
1717 PerlIOBuf_tell,
1718 PerlIOBuf_close,
1719 PerlIOCede_flush,
1720 PerlIOBuf_fill,
1721 PerlIOBase_eof,
1722 PerlIOBase_error,
1723 PerlIOBase_clearerr,
1724 PerlIOBase_setlinebuf,
1725 PerlIOBuf_get_base,
1726 PerlIOBuf_bufsiz,
1727 PerlIOBuf_get_ptr,
1728 PerlIOBuf_get_cnt,
1729 PerlIOBuf_set_ptrcnt,
1730};
1731
1732
1733MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1734
1735PROTOTYPES: DISABLE
1736
1737BOOT:
1738{
1739#ifdef USE_ITHREADS
1740 MUTEX_INIT (&coro_mutex);
1741#endif
1742 BOOT_PAGESIZE;
1743
1744 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1745 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1746
1747 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1748 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1749 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1750
1751 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1752 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1753 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1754
1755 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1756
1757 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1758 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1759 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1760 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1761
1762 main_mainstack = PL_mainstack;
1763 main_top_env = PL_top_env;
1764
1765 while (main_top_env->je_prev)
1766 main_top_env = main_top_env->je_prev;
1767
1768 coroapi.ver = CORO_API_VERSION;
1769 coroapi.rev = CORO_API_REVISION;
1770 coroapi.transfer = api_transfer;
1771
598 { 1772 {
599 SAVE (prev, flags); 1773 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
600 LOAD (next);
601 1774
602 /* mark this state as in-use */ 1775 if (!svp) croak ("Time::HiRes is required");
603 next->mainstack = 0; 1776 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
604 next->tmps_ix = -2;
605 1777
606 if (flags & TRANSFER_SAVE_CCTXT) 1778 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 } 1779 }
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 1780
624 if (flags & TRANSFER_SAVE_CCTXT) 1781 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} 1782}
644 1783
645MODULE = Coro::State PACKAGE = Coro::State 1784SV *
646 1785new (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: 1786 CODE:
669 Coro__State coro; 1787{
1788 struct coro *coro;
1789 MAGIC *mg;
1790 HV *hv;
1791 int i;
670 1792
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); 1793 Newz (0, coro, 1, struct coro);
1794 coro->args = newAV ();
1795 coro->flags = CF_NEW;
675 1796
676 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1797 if (coro_first) coro_first->prev = coro;
677 coro->mainstack = 0; /* actual work is done inside transfer */ 1798 coro->next = coro_first;
678 coro->sptr = 0; 1799 coro_first = coro;
679 coro->ssize = 0;
680 1800
681 RETVAL = coro; 1801 coro->hv = hv = newHV ();
1802 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1803 mg->mg_flags |= MGf_DUP;
1804 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1805
1806 av_extend (coro->args, items - 1);
1807 for (i = 1; i < items; i++)
1808 av_push (coro->args, newSVsv (ST (i)));
1809}
682 OUTPUT: 1810 OUTPUT:
683 RETVAL 1811 RETVAL
684 1812
1813# these not obviously related functions are all rolled into the same xs
1814# function to increase chances that they all will call transfer with the same
1815# stack offset
685void 1816void
686transfer(prev, next, flags = TRANSFER_SAVE_ALL) 1817_set_stacklevel (...)
687 Coro::State_or_hashref prev 1818 ALIAS:
688 Coro::State_or_hashref next 1819 Coro::State::transfer = 1
689 int flags 1820 Coro::schedule = 2
690 PROTOTYPE: @ 1821 Coro::cede = 3
1822 Coro::cede_notself = 4
691 CODE: 1823 CODE:
692 transfer (aTHX_ prev, next, flags); 1824{
1825 struct transfer_args ta;
1826
1827 PUTBACK;
1828 switch (ix)
1829 {
1830 case 0:
1831 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1832 ta.next = 0;
1833 break;
1834
1835 case 1:
1836 if (items != 2)
1837 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1838
1839 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1840 break;
1841
1842 case 2:
1843 prepare_schedule (aTHX_ &ta);
1844 break;
1845
1846 case 3:
1847 prepare_cede (aTHX_ &ta);
1848 break;
1849
1850 case 4:
1851 if (!prepare_cede_notself (aTHX_ &ta))
1852 XSRETURN_EMPTY;
1853
1854 break;
1855 }
1856 SPAGAIN;
1857
1858 BARRIER;
1859 PUTBACK;
1860 TRANSFER (ta, 0);
1861 SPAGAIN; /* might be the sp of a different coroutine now */
1862 /* be extra careful not to ever do anything after TRANSFER */
1863}
1864
1865bool
1866_destroy (SV *coro_sv)
1867 CODE:
1868 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1869 OUTPUT:
1870 RETVAL
693 1871
694void 1872void
695DESTROY(coro) 1873_exit (int code)
696 Coro::State coro 1874 PROTOTYPE: $
697 CODE: 1875 CODE:
1876 _exit (code);
698 1877
699 if (coro->mainstack && coro->mainstack != main_mainstack) 1878int
1879cctx_stacksize (int new_stacksize = 0)
1880 CODE:
1881 RETVAL = coro_stacksize;
1882 if (new_stacksize)
1883 coro_stacksize = new_stacksize;
1884 OUTPUT:
1885 RETVAL
1886
1887int
1888cctx_count ()
1889 CODE:
1890 RETVAL = cctx_count;
1891 OUTPUT:
1892 RETVAL
1893
1894int
1895cctx_idle ()
1896 CODE:
1897 RETVAL = cctx_idle;
1898 OUTPUT:
1899 RETVAL
1900
1901void
1902list ()
1903 PPCODE:
1904{
1905 struct coro *coro;
1906 for (coro = coro_first; coro; coro = coro->next)
1907 if (coro->hv)
1908 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1909}
1910
1911void
1912call (Coro::State coro, SV *coderef)
1913 ALIAS:
1914 eval = 1
1915 CODE:
1916{
1917 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
700 { 1918 {
701 struct coro temp; 1919 struct coro temp;
702 1920
703 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 1921 if (!(coro->flags & CF_RUNNING))
704 LOAD(aTHX_ coro); 1922 {
1923 PUTBACK;
1924 save_perl (aTHX_ &temp);
1925 load_perl (aTHX_ coro);
1926 }
705 1927
706 destroy_stacks (aTHX); 1928 {
1929 dSP;
1930 ENTER;
1931 SAVETMPS;
1932 PUTBACK;
1933 PUSHSTACK;
1934 PUSHMARK (SP);
707 1935
708 LOAD((&temp)); /* this will get rid of defsv etc.. */ 1936 if (ix)
1937 eval_sv (coderef, 0);
1938 else
1939 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
709 1940
710 coro->mainstack = 0; 1941 POPSTACK;
1942 SPAGAIN;
1943 FREETMPS;
1944 LEAVE;
1945 PUTBACK;
1946 }
1947
1948 if (!(coro->flags & CF_RUNNING))
1949 {
1950 save_perl (aTHX_ coro);
1951 load_perl (aTHX_ &temp);
1952 SPAGAIN;
1953 }
711 } 1954 }
1955}
712 1956
713 if (coro->sptr) 1957SV *
1958is_ready (Coro::State coro)
1959 PROTOTYPE: $
1960 ALIAS:
1961 is_ready = CF_READY
1962 is_running = CF_RUNNING
1963 is_new = CF_NEW
1964 is_destroyed = CF_DESTROYED
1965 CODE:
1966 RETVAL = boolSV (coro->flags & ix);
1967 OUTPUT:
1968 RETVAL
1969
1970void
1971api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1972
1973SV *
1974has_cctx (Coro::State coro)
1975 PROTOTYPE: $
1976 CODE:
1977 RETVAL = boolSV (!!coro->cctx);
1978 OUTPUT:
1979 RETVAL
1980
1981int
1982is_traced (Coro::State coro)
1983 PROTOTYPE: $
1984 CODE:
1985 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1986 OUTPUT:
1987 RETVAL
1988
1989IV
1990rss (Coro::State coro)
1991 PROTOTYPE: $
1992 ALIAS:
1993 usecount = 1
1994 CODE:
1995 switch (ix)
1996 {
1997 case 0: RETVAL = coro_rss (aTHX_ coro); break;
1998 case 1: RETVAL = coro->usecount; break;
1999 }
2000 OUTPUT:
2001 RETVAL
2002
2003void
2004force_cctx ()
2005 CODE:
2006 struct coro *coro = SvSTATE (coro_current);
2007 coro->cctx->idle_sp = 0;
2008
2009void
2010throw (Coro::State self, SV *throw = &PL_sv_undef)
2011 PROTOTYPE: $;$
2012 CODE:
2013 SvREFCNT_dec (self->throw);
2014 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2015
2016void
2017swap_defsv (Coro::State self)
2018 PROTOTYPE: $
2019 ALIAS:
2020 swap_defav = 1
2021 CODE:
2022 if (!self->slot)
2023 croak ("cannot swap state with coroutine that has no saved state");
2024 else
714 { 2025 {
715 deallocate_stack (coro); 2026 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
716 coro->sptr = 0; 2027 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2028
2029 SV *tmp = *src; *src = *dst; *dst = tmp;
717 } 2030 }
718 2031
719 Safefree (coro); 2032MODULE = Coro::State PACKAGE = Coro
2033
2034BOOT:
2035{
2036 int i;
2037
2038 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2039 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2040 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2041
2042 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2043 SvREADONLY_on (coro_current);
2044
2045 coro_stash = gv_stashpv ("Coro", TRUE);
2046
2047 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
2048 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
2049 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
2050 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
2051 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
2052 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
2053
2054 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
2055 coro_ready[i] = newAV ();
2056
2057 {
2058 SV *sv = perl_get_sv ("Coro::API", TRUE);
2059 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
2060
2061 coroapi.schedule = api_schedule;
2062 coroapi.cede = api_cede;
2063 coroapi.cede_notself = api_cede_notself;
2064 coroapi.ready = api_ready;
2065 coroapi.is_ready = api_is_ready;
2066 coroapi.nready = &coro_nready;
2067 coroapi.current = coro_current;
2068
2069 GCoroAPI = &coroapi;
2070 sv_setiv (sv, (IV)&coroapi);
2071 SvREADONLY_on (sv);
2072 }
2073}
720 2074
721void 2075void
722flush() 2076_set_current (SV *current)
2077 PROTOTYPE: $
723 CODE: 2078 CODE:
724#ifdef MAY_FLUSH 2079 SvREFCNT_dec (SvRV (coro_current));
725 flush_padlist_cache (); 2080 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 2081
732void 2082void
733yield(...) 2083_set_readyhook (SV *hook)
2084 PROTOTYPE: $
2085 CODE:
2086 LOCK;
2087 SvREFCNT_dec (coro_readyhook);
2088 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2089 UNLOCK;
2090
2091int
2092prio (Coro::State coro, int newprio = 0)
2093 ALIAS:
2094 nice = 1
2095 CODE:
2096{
2097 RETVAL = coro->prio;
2098
2099 if (items > 1)
2100 {
2101 if (ix)
2102 newprio = coro->prio - newprio;
2103
2104 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2105 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2106
2107 coro->prio = newprio;
2108 }
2109}
2110 OUTPUT:
2111 RETVAL
2112
2113SV *
2114ready (SV *self)
2115 PROTOTYPE: $
2116 CODE:
2117 RETVAL = boolSV (api_ready (self));
2118 OUTPUT:
2119 RETVAL
2120
2121int
2122nready (...)
2123 PROTOTYPE:
2124 CODE:
2125 RETVAL = coro_nready;
2126 OUTPUT:
2127 RETVAL
2128
2129# for async_pool speedup
2130void
2131_pool_1 (SV *cb)
2132 CODE:
2133{
2134 struct coro *coro = SvSTATE (coro_current);
2135 HV *hv = (HV *)SvRV (coro_current);
2136 AV *defav = GvAV (PL_defgv);
2137 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2138 AV *invoke_av;
2139 int i, len;
2140
2141 if (!invoke)
2142 {
2143 SV *old = PL_diehook;
2144 PL_diehook = 0;
2145 SvREFCNT_dec (old);
2146 croak ("\3async_pool terminate\2\n");
2147 }
2148
2149 SvREFCNT_dec (coro->saved_deffh);
2150 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2151
2152 hv_store (hv, "desc", sizeof ("desc") - 1,
2153 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2154
2155 invoke_av = (AV *)SvRV (invoke);
2156 len = av_len (invoke_av);
2157
2158 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2159
2160 if (len > 0)
2161 {
2162 av_fill (defav, len - 1);
2163 for (i = 0; i < len; ++i)
2164 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2165 }
2166
2167 SvREFCNT_dec (invoke);
2168}
2169
2170void
2171_pool_2 (SV *cb)
2172 CODE:
2173{
2174 struct coro *coro = SvSTATE (coro_current);
2175
2176 sv_setsv (cb, &PL_sv_undef);
2177
2178 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2179 coro->saved_deffh = 0;
2180
2181 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
2182 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2183 {
2184 SV *old = PL_diehook;
2185 PL_diehook = 0;
2186 SvREFCNT_dec (old);
2187 croak ("\3async_pool terminate\2\n");
2188 }
2189
2190 av_clear (GvAV (PL_defgv));
2191 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2192 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2193
2194 coro->prio = 0;
2195
2196 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2197 api_trace (coro_current, 0);
2198
2199 av_push (av_async_pool, newSVsv (coro_current));
2200}
2201
2202#if 0
2203
2204void
2205_generator_call (...)
734 PROTOTYPE: @ 2206 PROTOTYPE: @
2207 PPCODE:
2208 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2209 xxxx
2210 abort ();
2211
2212SV *
2213gensub (SV *sub, ...)
2214 PROTOTYPE: &;@
735 CODE: 2215 CODE:
736 static SV *returnstk; 2216{
2217 struct coro *coro;
2218 MAGIC *mg;
737 SV *sv; 2219 CV *xcv;
2220 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2221 int i;
2222
2223 CvGV (ncv) = CvGV (cv);
2224 CvFILE (ncv) = CvFILE (cv);
2225
2226 Newz (0, coro, 1, struct coro);
2227 coro->args = newAV ();
2228 coro->flags = CF_NEW;
2229
2230 av_extend (coro->args, items - 1);
2231 for (i = 1; i < items; i++)
2232 av_push (coro->args, newSVsv (ST (i)));
2233
2234 CvISXSUB_on (ncv);
2235 CvXSUBANY (ncv).any_ptr = (void *)coro;
2236
2237 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2238
2239 CvXSUB (ncv) = CvXSUB (xcv);
2240 CvANON_on (ncv);
2241
2242 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2243 RETVAL = newRV_noinc ((SV *)ncv);
2244}
2245 OUTPUT:
2246 RETVAL
2247
2248#endif
2249
2250
2251MODULE = Coro::State PACKAGE = Coro::AIO
2252
2253void
2254_get_state (SV *self)
2255 PPCODE:
2256{
738 AV *defav = GvAV (PL_defgv); 2257 AV *defav = GvAV (PL_defgv);
739 struct coro *prev, *next; 2258 AV *av = newAV ();
2259 int i;
2260 SV *data_sv = newSV (sizeof (struct io_state));
2261 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2262 SvCUR_set (data_sv, sizeof (struct io_state));
2263 SvPOK_only (data_sv);
740 2264
741 if (!returnstk) 2265 data->errorno = errno;
742 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 2266 data->laststype = PL_laststype;
2267 data->laststatval = PL_laststatval;
2268 data->statcache = PL_statcache;
743 2269
744 /* set up @_ -- ugly */ 2270 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 2271
750 mg_get (returnstk); /* isn't documentation wrong for mg_get? */ 2272 for (i = 0; i <= AvFILLp (defav); ++i)
751 sv = av_pop ((AV *)SvRV (returnstk)); 2273 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 2274
756 transfer(aTHX_ prev, next, 0); 2275 av_push (av, data_sv);
757 2276
2277 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2278
2279 api_ready (self);
2280}
2281
2282void
2283_set_state (SV *state)
2284 PROTOTYPE: $
2285 PPCODE:
2286{
2287 AV *av = (AV *)SvRV (state);
2288 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2289 int i;
2290
2291 errno = data->errorno;
2292 PL_laststype = data->laststype;
2293 PL_laststatval = data->laststatval;
2294 PL_statcache = data->statcache;
2295
2296 EXTEND (SP, AvFILLp (av));
2297 for (i = 0; i < AvFILLp (av); ++i)
2298 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2299}
2300
2301
2302MODULE = Coro::State PACKAGE = Coro::AnyEvent
2303
2304BOOT:
2305 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2306
2307SV *
2308_schedule (...)
2309 PROTOTYPE: @
2310 CODE:
2311{
2312 static int incede;
2313
2314 api_cede_notself ();
2315
2316 ++incede;
2317 while (coro_nready >= incede && api_cede ())
2318 ;
2319
2320 sv_setsv (sv_activity, &PL_sv_undef);
2321 if (coro_nready >= incede)
2322 {
2323 PUSHMARK (SP);
2324 PUTBACK;
2325 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2326 SPAGAIN;
2327 }
2328
2329 --incede;
2330}
2331
2332
2333MODULE = Coro::State PACKAGE = PerlIO::cede
2334
2335BOOT:
2336 PerlIO_define_layer (aTHX_ &PerlIO_cede);

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