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Comparing Coro/Coro/State.xs (file contents):
Revision 1.34 by root, Fri Sep 14 15:40:56 2001 UTC vs.
Revision 1.232 by root, Thu Apr 24 12:40:38 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"
4 9
5#include "libcoro/coro.c" 10#include "patchlevel.h"
6 11
7#include <signal.h> 12#include <stdio.h>
13#include <errno.h>
14#include <assert.h>
15
16#ifdef WIN32
17# undef setjmp
18# undef longjmp
19# undef _exit
20# define setjmp _setjmp // deep magic, don't ask
21#else
22# include <inttypes.h> /* most portable stdint.h */
23#endif
8 24
9#ifdef HAVE_MMAP 25#ifdef HAVE_MMAP
10# include <unistd.h> 26# include <unistd.h>
11# include <sys/mman.h> 27# include <sys/mman.h>
12# ifndef MAP_ANON
13# ifdef MAP_ANONYMOUS 28# ifndef MAP_ANONYMOUS
14# define MAP_ANON MAP_ANONYMOUS 29# ifdef MAP_ANON
30# define MAP_ANONYMOUS MAP_ANON
15# else 31# else
16# undef HAVE_MMAP 32# undef HAVE_MMAP
17# endif 33# endif
18# endif 34# endif
35# include <limits.h>
36# ifndef PAGESIZE
37# define PAGESIZE pagesize
38# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
39static long pagesize;
40# else
41# define BOOT_PAGESIZE (void)0
19#endif 42# endif
43#else
44# define PAGESIZE 0
45# define BOOT_PAGESIZE (void)0
46#endif
20 47
21#define MAY_FLUSH /* increases codesize and is rarely used */ 48#if CORO_USE_VALGRIND
49# include <valgrind/valgrind.h>
50# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
51#else
52# define REGISTER_STACK(cctx,start,end)
53#endif
22 54
23#define SUB_INIT "Coro::State::initialize" 55/* the maximum number of idle cctx that will be pooled */
24#define UCORO_STATE "_coro_state" 56#define MAX_IDLE_CCTX 8
25 57
26/* The next macro should declare a variable stacklevel that contains and approximation 58#define PERL_VERSION_ATLEAST(a,b,c) \
27 * to the current C stack pointer. Its property is that it changes with each call 59 (PERL_REVISION > (a) \
28 * and should be unique. */ 60 || (PERL_REVISION == (a) \
61 && (PERL_VERSION > (b) \
62 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
63
64#if !PERL_VERSION_ATLEAST (5,6,0)
65# ifndef PL_ppaddr
66# define PL_ppaddr ppaddr
67# endif
68# ifndef call_sv
69# define call_sv perl_call_sv
70# endif
71# ifndef get_sv
72# define get_sv perl_get_sv
73# endif
74# ifndef get_cv
75# define get_cv perl_get_cv
76# endif
77# ifndef IS_PADGV
78# define IS_PADGV(v) 0
79# endif
80# ifndef IS_PADCONST
81# define IS_PADCONST(v) 0
82# endif
83#endif
84
85/* 5.8.8 */
86#ifndef GV_NOTQUAL
87# define GV_NOTQUAL 0
88#endif
89#ifndef newSV
90# define newSV(l) NEWSV(0,l)
91#endif
92
93/* 5.11 */
94#ifndef CxHASARGS
95# define CxHASARGS(cx) (cx)->blk_sub.hasargs
96#endif
97
98/* 5.8.7 */
99#ifndef SvRV_set
100# define SvRV_set(s,v) SvRV(s) = (v)
101#endif
102
103#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
104# undef CORO_STACKGUARD
105#endif
106
107#ifndef CORO_STACKGUARD
108# define CORO_STACKGUARD 0
109#endif
110
111/* prefer perl internal functions over our own? */
112#ifndef CORO_PREFER_PERL_FUNCTIONS
113# define CORO_PREFER_PERL_FUNCTIONS 0
114#endif
115
116/* The next macros try to return the current stack pointer, in an as
117 * portable way as possible. */
118#define dSTACKLEVEL volatile char stacklevel
29#define dSTACKLEVEL void *stacklevel = &stacklevel 119#define STACKLEVEL ((void *)&stacklevel)
30 120
31#define IN_DESTRUCT (PL_main_cv == Nullcv) 121#define IN_DESTRUCT (PL_main_cv == Nullcv)
32 122
33#define labs(l) ((l) >= 0 ? (l) : -(l)) 123#if __GNUC__ >= 3
124# define attribute(x) __attribute__(x)
125# define BARRIER __asm__ __volatile__ ("" : : : "memory")
126# define expect(expr,value) __builtin_expect ((expr),(value))
127#else
128# define attribute(x)
129# define BARRIER
130# define expect(expr,value) (expr)
131#endif
132
133#define expect_false(expr) expect ((expr) != 0, 0)
134#define expect_true(expr) expect ((expr) != 0, 1)
135
136#define NOINLINE attribute ((noinline))
34 137
35#include "CoroAPI.h" 138#include "CoroAPI.h"
36 139
140#ifdef USE_ITHREADS
141static perl_mutex coro_mutex;
142# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
143# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
144#else
145# define LOCK (void)0
146# define UNLOCK (void)0
147#endif
148
149/* helper storage struct for Coro::AIO */
150struct io_state
151{
152 int errorno;
153 I32 laststype;
154 int laststatval;
155 Stat_t statcache;
156};
157
158static size_t coro_stacksize = CORO_STACKSIZE;
37static struct CoroAPI coroapi; 159static struct CoroAPI coroapi;
160static AV *main_mainstack; /* used to differentiate between $main and others */
161static JMPENV *main_top_env;
162static HV *coro_state_stash, *coro_stash;
163static volatile SV *coro_mortal; /* will be freed after next transfer */
38 164
39/* this is actually not only the c stack but also c registers etc... */ 165static GV *irsgv; /* $/ */
166static GV *stdoutgv; /* *STDOUT */
167static SV *rv_diehook;
168static SV *rv_warnhook;
169static HV *hv_sig; /* %SIG */
170
171/* async_pool helper stuff */
172static SV *sv_pool_rss;
173static SV *sv_pool_size;
174static AV *av_async_pool;
175
176static struct coro_cctx *cctx_first;
177static int cctx_count, cctx_idle;
178
179enum {
180 CC_MAPPED = 0x01,
181 CC_NOREUSE = 0x02, /* throw this away after tracing */
182 CC_TRACE = 0x04,
183 CC_TRACE_SUB = 0x08, /* trace sub calls */
184 CC_TRACE_LINE = 0x10, /* trace each statement */
185 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
186};
187
188/* this is a structure representing a c-level coroutine */
189typedef struct coro_cctx {
190 struct coro_cctx *next;
191
192 /* the stack */
193 void *sptr;
194 size_t ssize;
195
196 /* cpu state */
197 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
198 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
199 JMPENV *top_env;
200 coro_context cctx;
201
202#if CORO_USE_VALGRIND
203 int valgrind_id;
204#endif
205 unsigned char flags;
206} coro_cctx;
207
208enum {
209 CF_RUNNING = 0x0001, /* coroutine is running */
210 CF_READY = 0x0002, /* coroutine is ready */
211 CF_NEW = 0x0004, /* has never been switched to */
212 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
213};
214
215/* the structure where most of the perl state is stored, overlaid on the cxstack */
40typedef struct { 216typedef struct {
41 int refcnt; /* pointer reference counter */ 217 SV *defsv;
42 int usecnt; /* shared by how many coroutines */ 218 AV *defav;
43 int gencnt; /* generation counter */ 219 SV *errsv;
220 SV *irsgv;
221#define VAR(name,type) type name;
222# include "state.h"
223#undef VAR
224} perl_slots;
44 225
45 coro_context cctx; 226#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
46 227
47 void *sptr; 228/* this is a structure representing a perl-level coroutine */
48 long ssize; /* positive == mmap, otherwise malloc */
49} coro_stack;
50
51struct coro { 229struct coro {
52 /* the optional C context */ 230 /* the c coroutine allocated to this perl coroutine, if any */
53 coro_stack *stack; 231 coro_cctx *cctx;
54 void *cursp;
55 int gencnt;
56 232
57 /* optionally saved, might be zero */ 233 /* process data */
58 AV *defav;
59 SV *defsv;
60 SV *errsv;
61
62 /* saved global state not related to stacks */
63 U8 dowarn;
64 I32 in_eval;
65
66 /* the stacks and related info (callchain etc..) */
67 PERL_SI *curstackinfo;
68 AV *curstack;
69 AV *mainstack; 234 AV *mainstack;
70 SV **stack_sp; 235 perl_slots *slot; /* basically the saved sp */
71 OP *op;
72 SV **curpad;
73 SV **stack_base;
74 SV **stack_max;
75 SV **tmps_stack;
76 I32 tmps_floor;
77 I32 tmps_ix;
78 I32 tmps_max;
79 I32 *markstack;
80 I32 *markstack_ptr;
81 I32 *markstack_max;
82 I32 *scopestack;
83 I32 scopestack_ix;
84 I32 scopestack_max;
85 ANY *savestack;
86 I32 savestack_ix;
87 I32 savestack_max;
88 OP **retstack;
89 I32 retstack_ix;
90 I32 retstack_max;
91 COP *curcop;
92 JMPENV *top_env;
93 236
94 /* data associated with this coroutine (initial args) */ 237 AV *args; /* data associated with this coroutine (initial args) */
95 AV *args; 238 int refcnt; /* coroutines are refcounted, yes */
239 int flags; /* CF_ flags */
240 HV *hv; /* the perl hash associated with this coro, if any */
241
242 /* statistics */
243 int usecount; /* number of transfers to this coro */
244
245 /* coro process data */
246 int prio;
247 SV *throw; /* exception to be thrown */
248
249 /* async_pool */
250 SV *saved_deffh;
251
252 /* linked list */
253 struct coro *next, *prev;
96}; 254};
97 255
98typedef struct coro *Coro__State; 256typedef struct coro *Coro__State;
99typedef struct coro *Coro__State_or_hashref; 257typedef struct coro *Coro__State_or_hashref;
100
101static AV *main_mainstack; /* used to differentiate between $main and others */
102static HV *coro_state_stash;
103static SV *ucoro_state_sv;
104static U32 ucoro_state_hash;
105static HV *padlist_cache;
106
107/* mostly copied from op.c:cv_clone2 */
108STATIC AV *
109clone_padlist (AV *protopadlist)
110{
111 AV *av;
112 I32 ix;
113 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
114 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
115 SV **pname = AvARRAY (protopad_name);
116 SV **ppad = AvARRAY (protopad);
117 I32 fname = AvFILLp (protopad_name);
118 I32 fpad = AvFILLp (protopad);
119 AV *newpadlist, *newpad_name, *newpad;
120 SV **npad;
121
122 newpad_name = newAV ();
123 for (ix = fname; ix >= 0; ix--)
124 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
125
126 newpad = newAV ();
127 av_fill (newpad, AvFILLp (protopad));
128 npad = AvARRAY (newpad);
129
130 newpadlist = newAV ();
131 AvREAL_off (newpadlist);
132 av_store (newpadlist, 0, (SV *) newpad_name);
133 av_store (newpadlist, 1, (SV *) newpad);
134
135 av = newAV (); /* will be @_ */
136 av_extend (av, 0);
137 av_store (newpad, 0, (SV *) av);
138 AvFLAGS (av) = AVf_REIFY;
139
140 for (ix = fpad; ix > 0; ix--)
141 {
142 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
143 if (namesv && namesv != &PL_sv_undef)
144 {
145 char *name = SvPVX (namesv); /* XXX */
146 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
147 { /* lexical from outside? */
148 npad[ix] = SvREFCNT_inc (ppad[ix]);
149 }
150 else
151 { /* our own lexical */
152 SV *sv;
153 if (*name == '&')
154 sv = SvREFCNT_inc (ppad[ix]);
155 else if (*name == '@')
156 sv = (SV *) newAV ();
157 else if (*name == '%')
158 sv = (SV *) newHV ();
159 else
160 sv = NEWSV (0, 0);
161 if (!SvPADBUSY (sv))
162 SvPADMY_on (sv);
163 npad[ix] = sv;
164 }
165 }
166 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
167 {
168 npad[ix] = SvREFCNT_inc (ppad[ix]);
169 }
170 else
171 {
172 SV *sv = NEWSV (0, 0);
173 SvPADTMP_on (sv);
174 npad[ix] = sv;
175 }
176 }
177
178#if 0 /* return -ENOTUNDERSTOOD */
179 /* Now that vars are all in place, clone nested closures. */
180
181 for (ix = fpad; ix > 0; ix--) {
182 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
183 if (namesv
184 && namesv != &PL_sv_undef
185 && !(SvFLAGS(namesv) & SVf_FAKE)
186 && *SvPVX(namesv) == '&'
187 && CvCLONE(ppad[ix]))
188 {
189 CV *kid = cv_clone((CV*)ppad[ix]);
190 SvREFCNT_dec(ppad[ix]);
191 CvCLONE_on(kid);
192 SvPADMY_on(kid);
193 npad[ix] = (SV*)kid;
194 }
195 }
196#endif
197
198 return newpadlist;
199}
200
201#ifdef MAY_FLUSH
202STATIC void
203free_padlist (AV *padlist)
204{
205 /* may be during global destruction */
206 if (SvREFCNT(padlist))
207 {
208 I32 i = AvFILLp(padlist);
209 while (i >= 0)
210 {
211 SV **svp = av_fetch(padlist, i--, FALSE);
212 SV *sv = svp ? *svp : Nullsv;
213 if (sv)
214 SvREFCNT_dec(sv);
215 }
216
217 SvREFCNT_dec((SV*)padlist);
218 }
219}
220#endif
221
222/* the next two functions merely cache the padlists */
223STATIC void
224get_padlist (CV *cv)
225{
226 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
227
228 if (he && AvFILLp ((AV *)*he) >= 0)
229 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
230 else
231 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
232}
233
234STATIC void
235put_padlist (CV *cv)
236{
237 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
238
239 if (SvTYPE (*he) != SVt_PVAV)
240 {
241 SvREFCNT_dec (*he);
242 *he = (SV *)newAV ();
243 }
244
245 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
246}
247
248#ifdef MAY_FLUSH
249STATIC void
250flush_padlist_cache ()
251{
252 HV *hv = padlist_cache;
253 padlist_cache = newHV ();
254
255 if (hv_iterinit (hv))
256 {
257 HE *he;
258 AV *padlist;
259
260 while (!!(he = hv_iternext (hv)))
261 {
262 AV *av = (AV *)HeVAL(he);
263
264 /* casting is fun. */
265 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
266 free_padlist (padlist);
267 }
268 }
269
270 SvREFCNT_dec (hv);
271}
272#endif
273
274#define SB do {
275#define SE } while (0)
276
277#define LOAD(state) load_state(aTHX_ (state));
278#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
279
280#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
281
282static void
283load_state(pTHX_ Coro__State c)
284{
285 PL_dowarn = c->dowarn;
286 PL_in_eval = c->in_eval;
287
288 PL_curstackinfo = c->curstackinfo;
289 PL_curstack = c->curstack;
290 PL_mainstack = c->mainstack;
291 PL_stack_sp = c->stack_sp;
292 PL_op = c->op;
293 PL_curpad = c->curpad;
294 PL_stack_base = c->stack_base;
295 PL_stack_max = c->stack_max;
296 PL_tmps_stack = c->tmps_stack;
297 PL_tmps_floor = c->tmps_floor;
298 PL_tmps_ix = c->tmps_ix;
299 PL_tmps_max = c->tmps_max;
300 PL_markstack = c->markstack;
301 PL_markstack_ptr = c->markstack_ptr;
302 PL_markstack_max = c->markstack_max;
303 PL_scopestack = c->scopestack;
304 PL_scopestack_ix = c->scopestack_ix;
305 PL_scopestack_max = c->scopestack_max;
306 PL_savestack = c->savestack;
307 PL_savestack_ix = c->savestack_ix;
308 PL_savestack_max = c->savestack_max;
309 PL_retstack = c->retstack;
310 PL_retstack_ix = c->retstack_ix;
311 PL_retstack_max = c->retstack_max;
312 PL_curcop = c->curcop;
313 PL_top_env = c->top_env;
314
315 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
316 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
317 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
318
319 {
320 dSP;
321 CV *cv;
322
323 /* now do the ugly restore mess */
324 while ((cv = (CV *)POPs))
325 {
326 AV *padlist = (AV *)POPs;
327
328 if (padlist)
329 {
330 put_padlist (cv); /* mark this padlist as available */
331 CvPADLIST(cv) = padlist;
332#ifdef USE_THREADS
333 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
334#endif
335 }
336
337 ++CvDEPTH(cv);
338 }
339
340 PUTBACK;
341 }
342}
343
344static void
345save_state(pTHX_ Coro__State c, int flags)
346{
347 {
348 dSP;
349 I32 cxix = cxstack_ix;
350 PERL_CONTEXT *ccstk = cxstack;
351 PERL_SI *top_si = PL_curstackinfo;
352
353 /*
354 * the worst thing you can imagine happens first - we have to save
355 * (and reinitialize) all cv's in the whole callchain :(
356 */
357
358 PUSHs (Nullsv);
359 /* this loop was inspired by pp_caller */
360 for (;;)
361 {
362 while (cxix >= 0)
363 {
364 PERL_CONTEXT *cx = &ccstk[cxix--];
365
366 if (CxTYPE(cx) == CXt_SUB)
367 {
368 CV *cv = cx->blk_sub.cv;
369 if (CvDEPTH(cv))
370 {
371#ifdef USE_THREADS
372 /*XPUSHs ((SV *)CvOWNER(cv));*/
373 /*CvOWNER(cv) = 0;*/
374 /*error must unlock this cv etc.. etc...*/
375#endif
376 EXTEND (SP, CvDEPTH(cv)*2);
377
378 while (--CvDEPTH(cv))
379 {
380 /* this tells the restore code to increment CvDEPTH */
381 PUSHs (Nullsv);
382 PUSHs ((SV *)cv);
383 }
384
385 PUSHs ((SV *)CvPADLIST(cv));
386 PUSHs ((SV *)cv);
387
388 get_padlist (cv); /* this is a monster */
389 }
390 }
391 else if (CxTYPE(cx) == CXt_FORMAT)
392 {
393 /* I never used formats, so how should I know how these are implemented? */
394 /* my bold guess is as a simple, plain sub... */
395 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
396 }
397 }
398
399 if (top_si->si_type == PERLSI_MAIN)
400 break;
401
402 top_si = top_si->si_prev;
403 ccstk = top_si->si_cxstack;
404 cxix = top_si->si_cxix;
405 }
406
407 PUTBACK;
408 }
409
410 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
411 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
412 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
413
414 c->dowarn = PL_dowarn;
415 c->in_eval = PL_in_eval;
416
417 c->curstackinfo = PL_curstackinfo;
418 c->curstack = PL_curstack;
419 c->mainstack = PL_mainstack;
420 c->stack_sp = PL_stack_sp;
421 c->op = PL_op;
422 c->curpad = PL_curpad;
423 c->stack_base = PL_stack_base;
424 c->stack_max = PL_stack_max;
425 c->tmps_stack = PL_tmps_stack;
426 c->tmps_floor = PL_tmps_floor;
427 c->tmps_ix = PL_tmps_ix;
428 c->tmps_max = PL_tmps_max;
429 c->markstack = PL_markstack;
430 c->markstack_ptr = PL_markstack_ptr;
431 c->markstack_max = PL_markstack_max;
432 c->scopestack = PL_scopestack;
433 c->scopestack_ix = PL_scopestack_ix;
434 c->scopestack_max = PL_scopestack_max;
435 c->savestack = PL_savestack;
436 c->savestack_ix = PL_savestack_ix;
437 c->savestack_max = PL_savestack_max;
438 c->retstack = PL_retstack;
439 c->retstack_ix = PL_retstack_ix;
440 c->retstack_max = PL_retstack_max;
441 c->curcop = PL_curcop;
442 c->top_env = PL_top_env;
443}
444
445/*
446 * allocate various perl stacks. This is an exact copy
447 * of perl.c:init_stacks, except that it uses less memory
448 * on the assumption that coroutines do not usually need
449 * a lot of stackspace.
450 */
451STATIC void
452coro_init_stacks (pTHX)
453{
454 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
455 PL_curstackinfo->si_type = PERLSI_MAIN;
456 PL_curstack = PL_curstackinfo->si_stack;
457 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
458
459 PL_stack_base = AvARRAY(PL_curstack);
460 PL_stack_sp = PL_stack_base;
461 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
462
463 New(50,PL_tmps_stack,96,SV*);
464 PL_tmps_floor = -1;
465 PL_tmps_ix = -1;
466 PL_tmps_max = 96;
467
468 New(54,PL_markstack,16,I32);
469 PL_markstack_ptr = PL_markstack;
470 PL_markstack_max = PL_markstack + 16;
471
472 SET_MARK_OFFSET;
473
474 New(54,PL_scopestack,16,I32);
475 PL_scopestack_ix = 0;
476 PL_scopestack_max = 16;
477
478 New(54,PL_savestack,96,ANY);
479 PL_savestack_ix = 0;
480 PL_savestack_max = 96;
481
482 New(54,PL_retstack,8,OP*);
483 PL_retstack_ix = 0;
484 PL_retstack_max = 8;
485}
486
487/*
488 * destroy the stacks, the callchain etc...
489 * still there is a memleak of 128 bytes...
490 */
491STATIC void
492destroy_stacks(pTHX)
493{
494 if (!IN_DESTRUCT)
495 {
496 /* is this ugly, I ask? */
497 while (PL_scopestack_ix)
498 LEAVE;
499
500 /* sure it is, but more important: is it correct?? :/ */
501 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
502 FREETMPS;
503 }
504
505 while (PL_curstackinfo->si_next)
506 PL_curstackinfo = PL_curstackinfo->si_next;
507
508 while (PL_curstackinfo)
509 {
510 PERL_SI *p = PL_curstackinfo->si_prev;
511
512 {
513 dSP;
514 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
515 PUTBACK; /* possibly superfluous */
516 }
517
518 if (!IN_DESTRUCT)
519 {
520 dounwind(-1);
521 SvREFCNT_dec(PL_curstackinfo->si_stack);
522 }
523
524 Safefree(PL_curstackinfo->si_cxstack);
525 Safefree(PL_curstackinfo);
526 PL_curstackinfo = p;
527 }
528
529 Safefree(PL_tmps_stack);
530 Safefree(PL_markstack);
531 Safefree(PL_scopestack);
532 Safefree(PL_savestack);
533 Safefree(PL_retstack);
534}
535
536static void
537allocate_stack (Coro__State ctx, int alloc)
538{
539 coro_stack *stack;
540
541 New (0, stack, 1, coro_stack);
542
543 stack->refcnt = 1;
544 stack->usecnt = 1;
545 stack->gencnt = ctx->gencnt = 0;
546 if (alloc)
547 {
548#ifdef HAVE_MMAP
549 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
550 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
551 if (stack->sptr == (void *)-1)
552#endif
553 {
554 /*FIXME*//*D*//* reasonable stack size! */
555 stack->ssize = -4096 * sizeof (long);
556 New (0, stack->sptr, 4096, long);
557 }
558 }
559 else
560 stack->sptr = 0;
561
562 ctx->stack = stack;
563}
564
565static void
566deallocate_stack (Coro__State ctx)
567{
568 coro_stack *stack = ctx->stack;
569
570 ctx->stack = 0;
571
572 if (stack)
573 {
574 if (!--stack->refcnt)
575 {
576#ifdef HAVE_MMAP
577 if (stack->ssize > 0 && stack->sptr)
578 munmap (stack->sptr, stack->ssize);
579 else
580#else
581 Safefree (stack->sptr);
582#endif
583 Safefree (stack);
584 }
585 else if (ctx->gencnt == stack->gencnt)
586 --stack->usecnt;
587 }
588}
589
590static void
591setup_coro (void *arg)
592{
593 /*
594 * emulate part of the perl startup here.
595 */
596 dSP;
597 Coro__State ctx = (Coro__State)arg;
598 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
599
600 coro_init_stacks (aTHX);
601 /*PL_curcop = 0;*/
602 /*PL_in_eval = PL_in_eval;*/ /* inherit */
603 SvREFCNT_dec (GvAV (PL_defgv));
604 GvAV (PL_defgv) = ctx->args;
605
606 SPAGAIN;
607
608 if (ctx->stack)
609 {
610 ctx->cursp = 0;
611
612 PUSHMARK(SP);
613 PUTBACK;
614 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
615
616 if (SvTRUE (ERRSV))
617 croak (NULL);
618 else
619 croak ("FATAL: CCTXT coroutine returned!");
620 }
621 else
622 {
623 UNOP myop;
624
625 PL_op = (OP *)&myop;
626
627 Zero(&myop, 1, UNOP);
628 myop.op_next = Nullop;
629 myop.op_flags = OPf_WANT_VOID;
630
631 PUSHMARK(SP);
632 XPUSHs (sub_init);
633 /*
634 * the next line is slightly wrong, as PL_op->op_next
635 * is actually being executed so we skip the first op.
636 * that doesn't matter, though, since it is only
637 * pp_nextstate and we never return...
638 * ah yes, and I don't care anyways ;)
639 */
640 PUTBACK;
641 PL_op = pp_entersub();
642 SPAGAIN;
643
644 ENTER; /* necessary e.g. for dounwind */
645 }
646}
647
648static void
649continue_coro (void *arg)
650{
651 /*
652 * this is a _very_ stripped down perl interpreter ;)
653 */
654 Coro__State ctx = (Coro__State)arg;
655 JMPENV coro_start_env;
656
657 /* same as JMPENV_BOOTSTRAP */
658 Zero(&coro_start_env, 1, JMPENV);
659 coro_start_env.je_ret = -1;
660 coro_start_env.je_mustcatch = TRUE;
661 PL_top_env = &coro_start_env;
662
663 ctx->cursp = 0;
664 PL_op = PL_op->op_next;
665 CALLRUNOPS(aTHX);
666
667 abort ();
668}
669
670STATIC void
671transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
672{
673 dSTACKLEVEL;
674 static struct coro *xnext;
675
676 if (prev != next)
677 {
678 xnext = next;
679
680 if (next->mainstack)
681 {
682 SAVE (prev, flags);
683 LOAD (next);
684
685 /* mark this state as in-use */
686 next->mainstack = 0;
687 next->tmps_ix = -2;
688
689 /* stacklevel changed? if yes, grab the stack for us! */
690 if (flags & TRANSFER_SAVE_CCTXT)
691 {
692 if (!prev->stack)
693 allocate_stack (prev, 0);
694 else if (prev->cursp != stacklevel
695 && prev->stack->usecnt > 1)
696 {
697 prev->gencnt = ++prev->stack->gencnt;
698 prev->stack->usecnt = 1;
699 }
700
701 /* has our stack been invalidated? */
702 if (next->stack && next->stack->gencnt != next->gencnt)
703 {
704 deallocate_stack (next);
705 allocate_stack (next, 1);
706 coro_create (&(next->stack->cctx),
707 continue_coro, (void *)next,
708 next->stack->sptr, labs (next->stack->ssize));
709 }
710
711 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
712 /* don't add any code here */
713 }
714
715 }
716 else if (next->tmps_ix == -2)
717 croak ("tried to transfer to running coroutine");
718 else
719 {
720 SAVE (prev, -1); /* first get rid of the old state */
721
722 if (flags & TRANSFER_SAVE_CCTXT)
723 {
724 if (!prev->stack)
725 allocate_stack (prev, 0);
726
727 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
728 {
729 setup_coro (next);
730
731 prev->stack->refcnt++;
732 prev->stack->usecnt++;
733 next->stack = prev->stack;
734 next->gencnt = prev->gencnt;
735 }
736 else
737 {
738 allocate_stack (next, 1);
739 coro_create (&(next->stack->cctx),
740 setup_coro, (void *)next,
741 next->stack->sptr, labs (next->stack->ssize));
742 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
743 /* don't add any code here */
744 }
745 }
746 else
747 setup_coro (next);
748 }
749
750 /*
751 * xnext is now either prev or next, depending on wether
752 * we switched the c stack or not. that's why i use a global
753 * variable, that should become thread-specific at one point.
754 */
755 xnext->cursp = stacklevel;
756 }
757}
758
759static struct coro *
760sv_to_coro (SV *arg, const char *funcname, const char *varname)
761{
762 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)
763 {
764 HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);
765
766 if (!he)
767 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
768
769 arg = HeVAL(he);
770 }
771
772 /* must also be changed inside Coro::Cont::yield */
773 if (SvROK(arg) && SvOBJECT(SvRV(arg))
774 && SvSTASH(SvRV(arg)) == coro_state_stash)
775 return (struct coro *) SvIV((SV*)SvRV(arg));
776
777 croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);
778 /*NORETURN*/
779}
780
781static void
782api_transfer(pTHX_ SV *prev, SV *next, int flags)
783{
784 transfer(aTHX_
785 sv_to_coro (prev, "Coro::transfer", "prev"),
786 sv_to_coro (next, "Coro::transfer", "next"),
787 flags);
788}
789 258
790/** Coro ********************************************************************/ 259/** Coro ********************************************************************/
791 260
792#define PRIO_MAX 3 261#define PRIO_MAX 3
793#define PRIO_HIGH 1 262#define PRIO_HIGH 1
… …
795#define PRIO_LOW -1 264#define PRIO_LOW -1
796#define PRIO_IDLE -3 265#define PRIO_IDLE -3
797#define PRIO_MIN -4 266#define PRIO_MIN -4
798 267
799/* for Coro.pm */ 268/* for Coro.pm */
800static GV *coro_current, *coro_idle; 269static SV *coro_current;
801static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 270static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
802static int coro_nready; 271static int coro_nready;
272static struct coro *coro_first;
273
274/** lowlevel stuff **********************************************************/
275
276static SV *
277coro_get_sv (pTHX_ const char *name, int create)
278{
279#if PERL_VERSION_ATLEAST (5,10,0)
280 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
281 get_sv (name, create);
282#endif
283 return get_sv (name, create);
284}
285
286static AV *
287coro_get_av (pTHX_ const char *name, int create)
288{
289#if PERL_VERSION_ATLEAST (5,10,0)
290 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
291 get_av (name, create);
292#endif
293 return get_av (name, create);
294}
295
296static HV *
297coro_get_hv (pTHX_ const char *name, int create)
298{
299#if PERL_VERSION_ATLEAST (5,10,0)
300 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
301 get_hv (name, create);
302#endif
303 return get_hv (name, create);
304}
305
306static AV *
307coro_clone_padlist (pTHX_ CV *cv)
308{
309 AV *padlist = CvPADLIST (cv);
310 AV *newpadlist, *newpad;
311
312 newpadlist = newAV ();
313 AvREAL_off (newpadlist);
314#if PERL_VERSION_ATLEAST (5,10,0)
315 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
316#else
317 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
318#endif
319 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
320 --AvFILLp (padlist);
321
322 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
323 av_store (newpadlist, 1, (SV *)newpad);
324
325 return newpadlist;
326}
803 327
804static void 328static void
805coro_enq (SV *sv) 329free_padlist (pTHX_ AV *padlist)
806{ 330{
807 if (SvROK (sv)) 331 /* may be during global destruction */
332 if (SvREFCNT (padlist))
808 { 333 {
809 SV *hv = SvRV (sv); 334 I32 i = AvFILLp (padlist);
810 if (SvTYPE (hv) == SVt_PVHV) 335 while (i >= 0)
811 { 336 {
812 SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0); 337 SV **svp = av_fetch (padlist, i--, FALSE);
813 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 338 if (svp)
339 {
340 SV *sv;
341 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
342 SvREFCNT_dec (sv);
814 343
815 prio = prio > PRIO_MAX ? PRIO_MAX 344 SvREFCNT_dec (*svp);
816 : prio < PRIO_MIN ? PRIO_MIN 345 }
817 : prio;
818
819 av_push (coro_ready [prio - PRIO_MIN], sv);
820 coro_nready++;
821
822 return;
823 } 346 }
347
348 SvREFCNT_dec ((SV*)padlist);
349 }
350}
351
352static int
353coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
354{
355 AV *padlist;
356 AV *av = (AV *)mg->mg_obj;
357
358 /* casting is fun. */
359 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
360 free_padlist (aTHX_ padlist);
361
362 return 0;
363}
364
365#define CORO_MAGIC_type_cv PERL_MAGIC_ext
366#define CORO_MAGIC_type_state PERL_MAGIC_ext
367
368static MGVTBL coro_cv_vtbl = {
369 0, 0, 0, 0,
370 coro_cv_free
371};
372
373#define CORO_MAGIC(sv,type) \
374 SvMAGIC (sv) \
375 ? SvMAGIC (sv)->mg_type == type \
376 ? SvMAGIC (sv) \
377 : mg_find (sv, type) \
378 : 0
379
380#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
381#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
382
383static struct coro *
384SvSTATE_ (pTHX_ SV *coro)
385{
386 HV *stash;
387 MAGIC *mg;
388
389 if (SvROK (coro))
390 coro = SvRV (coro);
391
392 if (expect_false (SvTYPE (coro) != SVt_PVHV))
393 croak ("Coro::State object required");
394
395 stash = SvSTASH (coro);
396 if (expect_false (stash != coro_stash && stash != coro_state_stash))
397 {
398 /* very slow, but rare, check */
399 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
400 croak ("Coro::State object required");
401 }
402
403 mg = CORO_MAGIC_state (coro);
404 return (struct coro *)mg->mg_ptr;
405}
406
407#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
408
409/* the next two functions merely cache the padlists */
410static void
411get_padlist (pTHX_ CV *cv)
412{
413 MAGIC *mg = CORO_MAGIC_cv (cv);
414 AV *av;
415
416 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
417 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
418 else
419 {
420#if CORO_PREFER_PERL_FUNCTIONS
421 /* this is probably cleaner, but also slower? */
422 CV *cp = Perl_cv_clone (cv);
423 CvPADLIST (cv) = CvPADLIST (cp);
424 CvPADLIST (cp) = 0;
425 SvREFCNT_dec (cp);
426#else
427 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
428#endif
824 } 429 }
430}
825 431
826 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 432static void
433put_padlist (pTHX_ CV *cv)
434{
435 MAGIC *mg = CORO_MAGIC_cv (cv);
436 AV *av;
437
438 if (expect_false (!mg))
439 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
440
441 av = (AV *)mg->mg_obj;
442
443 if (expect_false (AvFILLp (av) >= AvMAX (av)))
444 av_extend (av, AvMAX (av) + 1);
445
446 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
447}
448
449/** load & save, init *******************************************************/
450
451static void
452load_perl (pTHX_ Coro__State c)
453{
454 perl_slots *slot = c->slot;
455 c->slot = 0;
456
457 PL_mainstack = c->mainstack;
458
459 GvSV (PL_defgv) = slot->defsv;
460 GvAV (PL_defgv) = slot->defav;
461 GvSV (PL_errgv) = slot->errsv;
462 GvSV (irsgv) = slot->irsgv;
463
464 #define VAR(name,type) PL_ ## name = slot->name;
465 # include "state.h"
466 #undef VAR
467
468 {
469 dSP;
470
471 CV *cv;
472
473 /* now do the ugly restore mess */
474 while (expect_true (cv = (CV *)POPs))
475 {
476 put_padlist (aTHX_ cv); /* mark this padlist as available */
477 CvDEPTH (cv) = PTR2IV (POPs);
478 CvPADLIST (cv) = (AV *)POPs;
479 }
480
481 PUTBACK;
482 }
483}
484
485static void
486save_perl (pTHX_ Coro__State c)
487{
488 {
489 dSP;
490 I32 cxix = cxstack_ix;
491 PERL_CONTEXT *ccstk = cxstack;
492 PERL_SI *top_si = PL_curstackinfo;
493
494 /*
495 * the worst thing you can imagine happens first - we have to save
496 * (and reinitialize) all cv's in the whole callchain :(
497 */
498
499 XPUSHs (Nullsv);
500 /* this loop was inspired by pp_caller */
501 for (;;)
502 {
503 while (expect_true (cxix >= 0))
504 {
505 PERL_CONTEXT *cx = &ccstk[cxix--];
506
507 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
508 {
509 CV *cv = cx->blk_sub.cv;
510
511 if (expect_true (CvDEPTH (cv)))
512 {
513 EXTEND (SP, 3);
514 PUSHs ((SV *)CvPADLIST (cv));
515 PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
516 PUSHs ((SV *)cv);
517
518 CvDEPTH (cv) = 0;
519 get_padlist (aTHX_ cv);
520 }
521 }
522 }
523
524 if (expect_true (top_si->si_type == PERLSI_MAIN))
525 break;
526
527 top_si = top_si->si_prev;
528 ccstk = top_si->si_cxstack;
529 cxix = top_si->si_cxix;
530 }
531
532 PUTBACK;
533 }
534
535 /* allocate some space on the context stack for our purposes */
536 /* we manually unroll here, as usually 2 slots is enough */
537 if (SLOT_COUNT >= 1) CXINC;
538 if (SLOT_COUNT >= 2) CXINC;
539 if (SLOT_COUNT >= 3) CXINC;
540 {
541 int i;
542 for (i = 3; i < SLOT_COUNT; ++i)
543 CXINC;
544 }
545 cxstack_ix -= SLOT_COUNT; /* undo allocation */
546
547 c->mainstack = PL_mainstack;
548
549 {
550 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
551
552 slot->defav = GvAV (PL_defgv);
553 slot->defsv = DEFSV;
554 slot->errsv = ERRSV;
555 slot->irsgv = GvSV (irsgv);
556
557 #define VAR(name,type) slot->name = PL_ ## name;
558 # include "state.h"
559 #undef VAR
560 }
561}
562
563/*
564 * allocate various perl stacks. This is an exact copy
565 * of perl.c:init_stacks, except that it uses less memory
566 * on the (sometimes correct) assumption that coroutines do
567 * not usually need a lot of stackspace.
568 */
569#if CORO_PREFER_PERL_FUNCTIONS
570# define coro_init_stacks init_stacks
571#else
572static void
573coro_init_stacks (pTHX)
574{
575 PL_curstackinfo = new_stackinfo(32, 8);
576 PL_curstackinfo->si_type = PERLSI_MAIN;
577 PL_curstack = PL_curstackinfo->si_stack;
578 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
579
580 PL_stack_base = AvARRAY(PL_curstack);
581 PL_stack_sp = PL_stack_base;
582 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
583
584 New(50,PL_tmps_stack,32,SV*);
585 PL_tmps_floor = -1;
586 PL_tmps_ix = -1;
587 PL_tmps_max = 32;
588
589 New(54,PL_markstack,16,I32);
590 PL_markstack_ptr = PL_markstack;
591 PL_markstack_max = PL_markstack + 16;
592
593#ifdef SET_MARK_OFFSET
594 SET_MARK_OFFSET;
595#endif
596
597 New(54,PL_scopestack,8,I32);
598 PL_scopestack_ix = 0;
599 PL_scopestack_max = 8;
600
601 New(54,PL_savestack,24,ANY);
602 PL_savestack_ix = 0;
603 PL_savestack_max = 24;
604
605#if !PERL_VERSION_ATLEAST (5,10,0)
606 New(54,PL_retstack,4,OP*);
607 PL_retstack_ix = 0;
608 PL_retstack_max = 4;
609#endif
610}
611#endif
612
613/*
614 * destroy the stacks, the callchain etc...
615 */
616static void
617coro_destroy_stacks (pTHX)
618{
619 while (PL_curstackinfo->si_next)
620 PL_curstackinfo = PL_curstackinfo->si_next;
621
622 while (PL_curstackinfo)
623 {
624 PERL_SI *p = PL_curstackinfo->si_prev;
625
626 if (!IN_DESTRUCT)
627 SvREFCNT_dec (PL_curstackinfo->si_stack);
628
629 Safefree (PL_curstackinfo->si_cxstack);
630 Safefree (PL_curstackinfo);
631 PL_curstackinfo = p;
632 }
633
634 Safefree (PL_tmps_stack);
635 Safefree (PL_markstack);
636 Safefree (PL_scopestack);
637 Safefree (PL_savestack);
638#if !PERL_VERSION_ATLEAST (5,10,0)
639 Safefree (PL_retstack);
640#endif
641}
642
643static size_t
644coro_rss (pTHX_ struct coro *coro)
645{
646 size_t rss = sizeof (*coro);
647
648 if (coro->mainstack)
649 {
650 perl_slots tmp_slot;
651 perl_slots *slot;
652
653 if (coro->flags & CF_RUNNING)
654 {
655 slot = &tmp_slot;
656
657 #define VAR(name,type) slot->name = PL_ ## name;
658 # include "state.h"
659 #undef VAR
660 }
661 else
662 slot = coro->slot;
663
664 rss += sizeof (slot->curstackinfo);
665 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
666 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
667 rss += slot->tmps_max * sizeof (SV *);
668 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
669 rss += slot->scopestack_max * sizeof (I32);
670 rss += slot->savestack_max * sizeof (ANY);
671
672#if !PERL_VERSION_ATLEAST (5,10,0)
673 rss += slot->retstack_max * sizeof (OP *);
674#endif
675 }
676
677 return rss;
678}
679
680/** coroutine stack handling ************************************************/
681
682static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
683static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
684
685/*
686 * This overrides the default magic get method of %SIG elements.
687 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
688 * and instead of tryign to save and restore the hash elements, we just provide
689 * readback here.
690 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
691 * not expecting this to actually change the hook. This is a potential problem
692 * when a schedule happens then, but we ignore this.
693 */
694static int
695coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
696{
697 const char *s = MgPV_nolen_const (mg);
698
699 if (*s == '_')
700 {
701 if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;
702 if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;
703 }
704
705 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
706}
707
708static int
709coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
710{
711 const char *s = MgPV_nolen_const (mg);
712
713 if (*s == '_')
714 {
715 SV **svp = 0;
716
717 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
718 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
719
720 if (svp)
721 {
722 SV *old = *svp;
723 *svp = newSVsv (sv);
724 SvREFCNT_dec (old);
725 return 0;
726 }
727 }
728
729 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
730}
731
732static void
733coro_setup (pTHX_ struct coro *coro)
734{
735 /*
736 * emulate part of the perl startup here.
737 */
738 coro_init_stacks (aTHX);
739
740 PL_runops = RUNOPS_DEFAULT;
741 PL_curcop = &PL_compiling;
742 PL_in_eval = EVAL_NULL;
743 PL_comppad = 0;
744 PL_curpm = 0;
745 PL_curpad = 0;
746 PL_localizing = 0;
747 PL_dirty = 0;
748 PL_restartop = 0;
749#if PERL_VERSION_ATLEAST (5,10,0)
750 PL_parser = 0;
751#endif
752
753 /* recreate the die/warn hooks */
754 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
755 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
756
757 GvSV (PL_defgv) = newSV (0);
758 GvAV (PL_defgv) = coro->args; coro->args = 0;
759 GvSV (PL_errgv) = newSV (0);
760 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
761 PL_rs = newSVsv (GvSV (irsgv));
762 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
763
764 {
765 dSP;
766 LOGOP myop;
767
768 Zero (&myop, 1, LOGOP);
769 myop.op_next = Nullop;
770 myop.op_flags = OPf_WANT_VOID;
771
772 PUSHMARK (SP);
773 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
774 PUTBACK;
775 PL_op = (OP *)&myop;
776 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
777 SPAGAIN;
778 }
779
780 /* this newly created coroutine might be run on an existing cctx which most
781 * likely was suspended in set_stacklevel, called from entersub.
782 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
783 * so we ENTER here for symmetry
784 */
785 ENTER;
786}
787
788static void
789coro_destroy (pTHX_ struct coro *coro)
790{
791 if (!IN_DESTRUCT)
792 {
793 /* restore all saved variables and stuff */
794 LEAVE_SCOPE (0);
795 assert (PL_tmps_floor == -1);
796
797 /* free all temporaries */
798 FREETMPS;
799 assert (PL_tmps_ix == -1);
800
801 /* unwind all extra stacks */
802 POPSTACK_TO (PL_mainstack);
803
804 /* unwind main stack */
805 dounwind (-1);
806 }
807
808 SvREFCNT_dec (GvSV (PL_defgv));
809 SvREFCNT_dec (GvAV (PL_defgv));
810 SvREFCNT_dec (GvSV (PL_errgv));
811 SvREFCNT_dec (PL_defoutgv);
812 SvREFCNT_dec (PL_rs);
813 SvREFCNT_dec (GvSV (irsgv));
814
815 SvREFCNT_dec (PL_diehook);
816 SvREFCNT_dec (PL_warnhook);
817
818 SvREFCNT_dec (coro->saved_deffh);
819 SvREFCNT_dec (coro->throw);
820
821 coro_destroy_stacks (aTHX);
822}
823
824static void
825free_coro_mortal (pTHX)
826{
827 if (expect_true (coro_mortal))
828 {
829 SvREFCNT_dec (coro_mortal);
830 coro_mortal = 0;
831 }
832}
833
834static int
835runops_trace (pTHX)
836{
837 COP *oldcop = 0;
838 int oldcxix = -2;
839 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
840 coro_cctx *cctx = coro->cctx;
841
842 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
843 {
844 PERL_ASYNC_CHECK ();
845
846 if (cctx->flags & CC_TRACE_ALL)
847 {
848 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
849 {
850 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
851 SV **bot, **top;
852 AV *av = newAV (); /* return values */
853 SV **cb;
854 dSP;
855
856 GV *gv = CvGV (cx->blk_sub.cv);
857 SV *fullname = sv_2mortal (newSV (0));
858 if (isGV (gv))
859 gv_efullname3 (fullname, gv, 0);
860
861 bot = PL_stack_base + cx->blk_oldsp + 1;
862 top = cx->blk_gimme == G_ARRAY ? SP + 1
863 : cx->blk_gimme == G_SCALAR ? bot + 1
864 : bot;
865
866 av_extend (av, top - bot);
867 while (bot < top)
868 av_push (av, SvREFCNT_inc (*bot++));
869
870 PL_runops = RUNOPS_DEFAULT;
871 ENTER;
872 SAVETMPS;
873 EXTEND (SP, 3);
874 PUSHMARK (SP);
875 PUSHs (&PL_sv_no);
876 PUSHs (fullname);
877 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
878 PUTBACK;
879 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
880 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
881 SPAGAIN;
882 FREETMPS;
883 LEAVE;
884 PL_runops = runops_trace;
885 }
886
887 if (oldcop != PL_curcop)
888 {
889 oldcop = PL_curcop;
890
891 if (PL_curcop != &PL_compiling)
892 {
893 SV **cb;
894
895 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
896 {
897 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
898
899 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
900 {
901 runops_proc_t old_runops = PL_runops;
902 dSP;
903 GV *gv = CvGV (cx->blk_sub.cv);
904 SV *fullname = sv_2mortal (newSV (0));
905
906 if (isGV (gv))
907 gv_efullname3 (fullname, gv, 0);
908
909 PL_runops = RUNOPS_DEFAULT;
910 ENTER;
911 SAVETMPS;
912 EXTEND (SP, 3);
913 PUSHMARK (SP);
914 PUSHs (&PL_sv_yes);
915 PUSHs (fullname);
916 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
917 PUTBACK;
918 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
919 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
920 SPAGAIN;
921 FREETMPS;
922 LEAVE;
923 PL_runops = runops_trace;
924 }
925
926 oldcxix = cxstack_ix;
927 }
928
929 if (cctx->flags & CC_TRACE_LINE)
930 {
931 dSP;
932
933 PL_runops = RUNOPS_DEFAULT;
934 ENTER;
935 SAVETMPS;
936 EXTEND (SP, 3);
937 PL_runops = RUNOPS_DEFAULT;
938 PUSHMARK (SP);
939 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
940 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
941 PUTBACK;
942 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
943 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
944 SPAGAIN;
945 FREETMPS;
946 LEAVE;
947 PL_runops = runops_trace;
948 }
949 }
950 }
951 }
952 }
953
954 TAINT_NOT;
955 return 0;
956}
957
958/* inject a fake call to Coro::State::_cctx_init into the execution */
959/* _cctx_init should be careful, as it could be called at almost any time */
960/* during execution of a perl program */
961static void NOINLINE
962cctx_prepare (pTHX_ coro_cctx *cctx)
963{
964 dSP;
965 LOGOP myop;
966
967 PL_top_env = &PL_start_env;
968
969 if (cctx->flags & CC_TRACE)
970 PL_runops = runops_trace;
971
972 Zero (&myop, 1, LOGOP);
973 myop.op_next = PL_op;
974 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
975
976 PUSHMARK (SP);
977 EXTEND (SP, 2);
978 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
979 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
980 PUTBACK;
981 PL_op = (OP *)&myop;
982 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
983 SPAGAIN;
984}
985
986/*
987 * this is a _very_ stripped down perl interpreter ;)
988 */
989static void
990cctx_run (void *arg)
991{
992 dTHX;
993
994 /* cctx_run is the alternative tail of transfer(), so unlock here. */
995 UNLOCK;
996
997 /* we now skip the entersub that lead to transfer() */
998 PL_op = PL_op->op_next;
999
1000 /* inject a fake subroutine call to cctx_init */
1001 cctx_prepare (aTHX_ (coro_cctx *)arg);
1002
1003 /* somebody or something will hit me for both perl_run and PL_restartop */
1004 PL_restartop = PL_op;
1005 perl_run (PL_curinterp);
1006
1007 /*
1008 * If perl-run returns we assume exit() was being called or the coro
1009 * fell off the end, which seems to be the only valid (non-bug)
1010 * reason for perl_run to return. We try to exit by jumping to the
1011 * bootstrap-time "top" top_env, as we cannot restore the "main"
1012 * coroutine as Coro has no such concept
1013 */
1014 PL_top_env = main_top_env;
1015 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1016}
1017
1018static coro_cctx *
1019cctx_new ()
1020{
1021 coro_cctx *cctx;
1022 void *stack_start;
1023 size_t stack_size;
1024
1025 ++cctx_count;
1026
1027 Newz (0, cctx, 1, coro_cctx);
1028
1029#if HAVE_MMAP
1030 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1031 /* mmap supposedly does allocate-on-write for us */
1032 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1033
1034 if (cctx->sptr != (void *)-1)
1035 {
1036# if CORO_STACKGUARD
1037 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1038# endif
1039 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
1040 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1041 cctx->flags |= CC_MAPPED;
1042 }
1043 else
1044#endif
1045 {
1046 cctx->ssize = coro_stacksize * (long)sizeof (long);
1047 New (0, cctx->sptr, coro_stacksize, long);
1048
1049 if (!cctx->sptr)
1050 {
1051 perror ("FATAL: unable to allocate stack for coroutine");
1052 _exit (EXIT_FAILURE);
1053 }
1054
1055 stack_start = cctx->sptr;
1056 stack_size = cctx->ssize;
1057 }
1058
1059 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1060 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1061
1062 return cctx;
1063}
1064
1065static void
1066cctx_destroy (coro_cctx *cctx)
1067{
1068 if (!cctx)
1069 return;
1070
1071 --cctx_count;
1072
1073#if CORO_USE_VALGRIND
1074 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1075#endif
1076
1077#if HAVE_MMAP
1078 if (cctx->flags & CC_MAPPED)
1079 munmap (cctx->sptr, cctx->ssize);
1080 else
1081#endif
1082 Safefree (cctx->sptr);
1083
1084 Safefree (cctx);
1085}
1086
1087/* wether this cctx should be destructed */
1088#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
1089
1090static coro_cctx *
1091cctx_get (pTHX)
1092{
1093 while (expect_true (cctx_first))
1094 {
1095 coro_cctx *cctx = cctx_first;
1096 cctx_first = cctx->next;
1097 --cctx_idle;
1098
1099 if (expect_true (!CCTX_EXPIRED (cctx)))
1100 return cctx;
1101
1102 cctx_destroy (cctx);
1103 }
1104
1105 return cctx_new ();
1106}
1107
1108static void
1109cctx_put (coro_cctx *cctx)
1110{
1111 /* free another cctx if overlimit */
1112 if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
1113 {
1114 coro_cctx *first = cctx_first;
1115 cctx_first = first->next;
1116 --cctx_idle;
1117
1118 cctx_destroy (first);
1119 }
1120
1121 ++cctx_idle;
1122 cctx->next = cctx_first;
1123 cctx_first = cctx;
1124}
1125
1126/** coroutine switching *****************************************************/
1127
1128static void
1129transfer_check (pTHX_ struct coro *prev, struct coro *next)
1130{
1131 if (expect_true (prev != next))
1132 {
1133 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1134 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1135
1136 if (expect_false (next->flags & CF_RUNNING))
1137 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1138
1139 if (expect_false (next->flags & CF_DESTROYED))
1140 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1141
1142#if !PERL_VERSION_ATLEAST (5,10,0)
1143 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1144 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1145#endif
1146 }
1147}
1148
1149/* always use the TRANSFER macro */
1150static void NOINLINE
1151transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1152{
1153 dSTACKLEVEL;
1154 static volatile int has_throw;
1155
1156 /* sometimes transfer is only called to set idle_sp */
1157 if (expect_false (!next))
1158 {
1159 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1160 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1161 }
1162 else if (expect_true (prev != next))
1163 {
1164 coro_cctx *prev__cctx;
1165
1166 if (expect_false (prev->flags & CF_NEW))
1167 {
1168 /* create a new empty context */
1169 Newz (0, prev->cctx, 1, coro_cctx);
1170 prev->flags &= ~CF_NEW;
1171 prev->flags |= CF_RUNNING;
1172 }
1173
1174 prev->flags &= ~CF_RUNNING;
1175 next->flags |= CF_RUNNING;
1176
1177 LOCK;
1178
1179 /* first get rid of the old state */
1180 save_perl (aTHX_ prev);
1181
1182 if (expect_false (next->flags & CF_NEW))
1183 {
1184 /* need to start coroutine */
1185 next->flags &= ~CF_NEW;
1186 /* setup coroutine call */
1187 coro_setup (aTHX_ next);
1188 }
1189 else
1190 load_perl (aTHX_ next);
1191
1192 prev__cctx = prev->cctx;
1193
1194 /* possibly "free" the cctx */
1195 if (expect_true (
1196 prev__cctx->idle_sp == STACKLEVEL
1197 && !(prev__cctx->flags & CC_TRACE)
1198 && !force_cctx
1199 ))
1200 {
1201 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1202 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
1203
1204 prev->cctx = 0;
1205
1206 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1207 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1208 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1209 if (!next->cctx)
1210 next->cctx = cctx_get (aTHX);
1211
1212 cctx_put (prev__cctx);
1213 }
1214
1215 ++next->usecount;
1216
1217 if (expect_true (!next->cctx))
1218 next->cctx = cctx_get (aTHX);
1219
1220 has_throw = !!next->throw;
1221
1222 if (expect_false (prev__cctx != next->cctx))
1223 {
1224 prev__cctx->top_env = PL_top_env;
1225 PL_top_env = next->cctx->top_env;
1226 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1227 }
1228
1229 free_coro_mortal (aTHX);
1230 UNLOCK;
1231
1232 if (expect_false (has_throw))
1233 {
1234 struct coro *coro = SvSTATE (coro_current);
1235
1236 if (coro->throw)
1237 {
1238 SV *exception = coro->throw;
1239 coro->throw = 0;
1240 sv_setsv (ERRSV, exception);
1241 croak (0);
1242 }
1243 }
1244 }
1245}
1246
1247struct transfer_args
1248{
1249 struct coro *prev, *next;
1250};
1251
1252#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1253#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1254
1255/** high level stuff ********************************************************/
1256
1257static int
1258coro_state_destroy (pTHX_ struct coro *coro)
1259{
1260 if (coro->flags & CF_DESTROYED)
1261 return 0;
1262
1263 coro->flags |= CF_DESTROYED;
1264
1265 if (coro->flags & CF_READY)
1266 {
1267 /* reduce nready, as destroying a ready coro effectively unreadies it */
1268 /* alternative: look through all ready queues and remove the coro */
1269 LOCK;
1270 --coro_nready;
1271 UNLOCK;
1272 }
1273 else
1274 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1275
1276 if (coro->mainstack && coro->mainstack != main_mainstack)
1277 {
1278 struct coro temp;
1279
1280 if (coro->flags & CF_RUNNING)
1281 croak ("FATAL: tried to destroy currently running coroutine");
1282
1283 save_perl (aTHX_ &temp);
1284 load_perl (aTHX_ coro);
1285
1286 coro_destroy (aTHX_ coro);
1287
1288 load_perl (aTHX_ &temp);
1289
1290 coro->slot = 0;
1291 }
1292
1293 cctx_destroy (coro->cctx);
1294 SvREFCNT_dec (coro->args);
1295
1296 if (coro->next) coro->next->prev = coro->prev;
1297 if (coro->prev) coro->prev->next = coro->next;
1298 if (coro == coro_first) coro_first = coro->next;
1299
1300 return 1;
1301}
1302
1303static int
1304coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1305{
1306 struct coro *coro = (struct coro *)mg->mg_ptr;
1307 mg->mg_ptr = 0;
1308
1309 coro->hv = 0;
1310
1311 if (--coro->refcnt < 0)
1312 {
1313 coro_state_destroy (aTHX_ coro);
1314 Safefree (coro);
1315 }
1316
1317 return 0;
1318}
1319
1320static int
1321coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1322{
1323 struct coro *coro = (struct coro *)mg->mg_ptr;
1324
1325 ++coro->refcnt;
1326
1327 return 0;
1328}
1329
1330static MGVTBL coro_state_vtbl = {
1331 0, 0, 0, 0,
1332 coro_state_free,
1333 0,
1334#ifdef MGf_DUP
1335 coro_state_dup,
1336#else
1337# define MGf_DUP 0
1338#endif
1339};
1340
1341static void
1342prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1343{
1344 ta->prev = SvSTATE (prev_sv);
1345 ta->next = SvSTATE (next_sv);
1346 TRANSFER_CHECK (*ta);
1347}
1348
1349static void
1350api_transfer (SV *prev_sv, SV *next_sv)
1351{
1352 dTHX;
1353 struct transfer_args ta;
1354
1355 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1356 TRANSFER (ta, 1);
1357}
1358
1359/** Coro ********************************************************************/
1360
1361static void
1362coro_enq (pTHX_ SV *coro_sv)
1363{
1364 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
827} 1365}
828 1366
829static SV * 1367static SV *
830coro_deq (int min_prio) 1368coro_deq (pTHX)
831{ 1369{
832 int prio = PRIO_MAX - PRIO_MIN; 1370 int prio;
833 1371
834 min_prio -= PRIO_MIN;
835 if (min_prio < 0)
836 min_prio = 0;
837
838 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1372 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
839 if (av_len (coro_ready[prio]) >= 0) 1373 if (AvFILLp (coro_ready [prio]) >= 0)
840 {
841 coro_nready--;
842 return av_shift (coro_ready[prio]); 1374 return av_shift (coro_ready [prio]);
843 }
844 1375
845 return 0; 1376 return 0;
846} 1377}
847 1378
1379static int
1380api_ready (SV *coro_sv)
1381{
1382 dTHX;
1383 struct coro *coro;
1384
1385 if (SvROK (coro_sv))
1386 coro_sv = SvRV (coro_sv);
1387
1388 coro = SvSTATE (coro_sv);
1389
1390 if (coro->flags & CF_READY)
1391 return 0;
1392
1393 coro->flags |= CF_READY;
1394
1395 LOCK;
1396 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1397 ++coro_nready;
1398 UNLOCK;
1399
1400 return 1;
1401}
1402
1403static int
1404api_is_ready (SV *coro_sv)
1405{
1406 dTHX;
1407 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1408}
1409
848static void 1410static void
849api_ready (SV *coro) 1411prepare_schedule (pTHX_ struct transfer_args *ta)
850{ 1412{
851 coro_enq (SvREFCNT_inc (coro)); 1413 SV *prev_sv, *next_sv;
1414
1415 for (;;)
1416 {
1417 LOCK;
1418 next_sv = coro_deq (aTHX);
1419
1420 /* nothing to schedule: call the idle handler */
1421 if (expect_false (!next_sv))
1422 {
1423 dSP;
1424 UNLOCK;
1425
1426 ENTER;
1427 SAVETMPS;
1428
1429 PUSHMARK (SP);
1430 PUTBACK;
1431 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1432 SPAGAIN;
1433
1434 FREETMPS;
1435 LEAVE;
1436 continue;
1437 }
1438
1439 ta->next = SvSTATE (next_sv);
1440
1441 /* cannot transfer to destroyed coros, skip and look for next */
1442 if (expect_false (ta->next->flags & CF_DESTROYED))
1443 {
1444 UNLOCK;
1445 SvREFCNT_dec (next_sv);
1446 /* coro_nready is already taken care of by destroy */
1447 continue;
1448 }
1449
1450 --coro_nready;
1451 UNLOCK;
1452 break;
1453 }
1454
1455 /* free this only after the transfer */
1456 prev_sv = SvRV (coro_current);
1457 ta->prev = SvSTATE (prev_sv);
1458 TRANSFER_CHECK (*ta);
1459 assert (ta->next->flags & CF_READY);
1460 ta->next->flags &= ~CF_READY;
1461 SvRV_set (coro_current, next_sv);
1462
1463 LOCK;
1464 free_coro_mortal (aTHX);
1465 coro_mortal = prev_sv;
1466 UNLOCK;
852} 1467}
853 1468
854static void 1469static void
855api_schedule (int cede) 1470prepare_cede (pTHX_ struct transfer_args *ta)
856{ 1471{
857 SV *prev, *next; 1472 api_ready (coro_current);
1473 prepare_schedule (aTHX_ ta);
1474}
858 1475
1476static int
1477prepare_cede_notself (pTHX_ struct transfer_args *ta)
1478{
1479 if (coro_nready)
1480 {
859 prev = GvSV (coro_current); 1481 SV *prev = SvRV (coro_current);
860 1482 prepare_schedule (aTHX_ ta);
861 if (cede) 1483 api_ready (prev);
862 coro_enq (SvREFCNT_inc (prev)); 1484 return 1;
863 1485 }
864 next = coro_deq (PRIO_MIN); 1486 else
865 1487 return 0;
866 if (!next)
867 next = SvREFCNT_inc (GvSV (coro_idle));
868
869 GvSV (coro_current) = SvREFCNT_inc (next);
870 transfer (aTHX_
871 sv_to_coro (prev, "Coro::schedule", "current coroutine"),
872 sv_to_coro (next, "Coro::schedule", "next coroutine"),
873 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
874 SvREFCNT_dec (next);
875 SvREFCNT_dec (prev);
876} 1488}
877 1489
1490static void
1491api_schedule (void)
1492{
1493 dTHX;
1494 struct transfer_args ta;
1495
1496 prepare_schedule (aTHX_ &ta);
1497 TRANSFER (ta, 1);
1498}
1499
1500static int
1501api_cede (void)
1502{
1503 dTHX;
1504 struct transfer_args ta;
1505
1506 prepare_cede (aTHX_ &ta);
1507
1508 if (expect_true (ta.prev != ta.next))
1509 {
1510 TRANSFER (ta, 1);
1511 return 1;
1512 }
1513 else
1514 return 0;
1515}
1516
1517static int
1518api_cede_notself (void)
1519{
1520 dTHX;
1521 struct transfer_args ta;
1522
1523 if (prepare_cede_notself (aTHX_ &ta))
1524 {
1525 TRANSFER (ta, 1);
1526 return 1;
1527 }
1528 else
1529 return 0;
1530}
1531
1532static void
1533api_trace (SV *coro_sv, int flags)
1534{
1535 dTHX;
1536 struct coro *coro = SvSTATE (coro_sv);
1537
1538 if (flags & CC_TRACE)
1539 {
1540 if (!coro->cctx)
1541 coro->cctx = cctx_new ();
1542 else if (!(coro->cctx->flags & CC_TRACE))
1543 croak ("cannot enable tracing on coroutine with custom stack");
1544
1545 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1546 }
1547 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1548 {
1549 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1550
1551 if (coro->flags & CF_RUNNING)
1552 PL_runops = RUNOPS_DEFAULT;
1553 else
1554 coro->slot->runops = RUNOPS_DEFAULT;
1555 }
1556}
1557
878MODULE = Coro::State PACKAGE = Coro::State 1558MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
879 1559
880PROTOTYPES: ENABLE 1560PROTOTYPES: DISABLE
881 1561
882BOOT: 1562BOOT:
883{ /* {} necessary for stoopid perl-5.6.x */ 1563{
884 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 1564#ifdef USE_ITHREADS
885 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 1565 MUTEX_INIT (&coro_mutex);
1566#endif
1567 BOOT_PAGESIZE;
1568
1569 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1570 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1571
1572 orig_sigelem_get = PL_vtbl_sigelem.svt_get;
1573 PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1574 orig_sigelem_set = PL_vtbl_sigelem.svt_set;
1575 PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1576
1577 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1578 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1579 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1580
886 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1581 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
887 1582
888 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1583 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
889 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1584 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
890 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1585 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
891 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1586 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
892
893 if (!padlist_cache)
894 padlist_cache = newHV ();
895 1587
896 main_mainstack = PL_mainstack; 1588 main_mainstack = PL_mainstack;
1589 main_top_env = PL_top_env;
1590
1591 while (main_top_env->je_prev)
1592 main_top_env = main_top_env->je_prev;
897 1593
898 coroapi.ver = CORO_API_VERSION; 1594 coroapi.ver = CORO_API_VERSION;
1595 coroapi.rev = CORO_API_REVISION;
899 coroapi.transfer = api_transfer; 1596 coroapi.transfer = api_transfer;
900}
901 1597
902Coro::State 1598 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
903_newprocess(args) 1599}
904 SV * args 1600
905 PROTOTYPE: $ 1601SV *
1602new (char *klass, ...)
906 CODE: 1603 CODE:
907 Coro__State coro; 1604{
1605 struct coro *coro;
1606 MAGIC *mg;
1607 HV *hv;
1608 int i;
908 1609
909 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
910 croak ("Coro::State::_newprocess expects an arrayref");
911
912 New (0, coro, 1, struct coro); 1610 Newz (0, coro, 1, struct coro);
1611 coro->args = newAV ();
1612 coro->flags = CF_NEW;
913 1613
914 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1614 if (coro_first) coro_first->prev = coro;
915 coro->mainstack = 0; /* actual work is done inside transfer */ 1615 coro->next = coro_first;
916 coro->stack = 0; 1616 coro_first = coro;
917 1617
918 RETVAL = coro; 1618 coro->hv = hv = newHV ();
1619 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1620 mg->mg_flags |= MGf_DUP;
1621 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1622
1623 av_extend (coro->args, items - 1);
1624 for (i = 1; i < items; i++)
1625 av_push (coro->args, newSVsv (ST (i)));
1626}
919 OUTPUT: 1627 OUTPUT:
920 RETVAL 1628 RETVAL
921 1629
1630# these not obviously related functions are all rolled into the same xs
1631# function to increase chances that they all will call transfer with the same
1632# stack offset
922void 1633void
923transfer(prev, next, flags) 1634_set_stacklevel (...)
924 Coro::State_or_hashref prev 1635 ALIAS:
925 Coro::State_or_hashref next 1636 Coro::State::transfer = 1
926 int flags 1637 Coro::schedule = 2
927 PROTOTYPE: @ 1638 Coro::cede = 3
1639 Coro::cede_notself = 4
928 CODE: 1640 CODE:
1641{
1642 struct transfer_args ta;
1643
929 PUTBACK; 1644 PUTBACK;
930 transfer (aTHX_ prev, next, flags); 1645 switch (ix)
1646 {
1647 case 0:
1648 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1649 ta.next = 0;
1650 break;
1651
1652 case 1:
1653 if (items != 2)
1654 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1655
1656 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1657 break;
1658
1659 case 2:
1660 prepare_schedule (aTHX_ &ta);
1661 break;
1662
1663 case 3:
1664 prepare_cede (aTHX_ &ta);
1665 break;
1666
1667 case 4:
1668 if (!prepare_cede_notself (aTHX_ &ta))
1669 XSRETURN_EMPTY;
1670
1671 break;
1672 }
931 SPAGAIN; 1673 SPAGAIN;
932 1674
1675 BARRIER;
1676 PUTBACK;
1677 TRANSFER (ta, 0);
1678 SPAGAIN; /* might be the sp of a different coroutine now */
1679 /* be extra careful not to ever do anything after TRANSFER */
1680}
1681
1682bool
1683_destroy (SV *coro_sv)
1684 CODE:
1685 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1686 OUTPUT:
1687 RETVAL
1688
933void 1689void
934DESTROY(coro)
935 Coro::State coro
936 CODE:
937
938 if (coro->mainstack && coro->mainstack != main_mainstack)
939 {
940 struct coro temp;
941
942 PUTBACK;
943 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
944 LOAD(aTHX_ coro);
945 SPAGAIN;
946
947 destroy_stacks (aTHX);
948
949 LOAD((&temp)); /* this will get rid of defsv etc.. */
950 SPAGAIN;
951
952 coro->mainstack = 0;
953 }
954
955 deallocate_stack (coro);
956
957 Safefree (coro);
958
959void
960flush()
961 CODE:
962#ifdef MAY_FLUSH
963 flush_padlist_cache ();
964#endif
965
966void
967_exit(code) 1690_exit (code)
968 int code 1691 int code
969 PROTOTYPE: $ 1692 PROTOTYPE: $
970 CODE: 1693 CODE:
971#if defined(__GLIBC__) || _POSIX_C_SOURCE
972 _exit (code); 1694 _exit (code);
973#else
974 signal (SIGTERM, SIG_DFL);
975 raise (SIGTERM);
976 exit (code);
977#endif
978 1695
979MODULE = Coro::State PACKAGE = Coro::Cont 1696int
1697cctx_stacksize (int new_stacksize = 0)
1698 CODE:
1699 RETVAL = coro_stacksize;
1700 if (new_stacksize)
1701 coro_stacksize = new_stacksize;
1702 OUTPUT:
1703 RETVAL
980 1704
981# this is slightly dirty (should expose a c-level api) 1705int
1706cctx_count ()
1707 CODE:
1708 RETVAL = cctx_count;
1709 OUTPUT:
1710 RETVAL
1711
1712int
1713cctx_idle ()
1714 CODE:
1715 RETVAL = cctx_idle;
1716 OUTPUT:
1717 RETVAL
982 1718
983void 1719void
984yield(...) 1720list ()
985 PROTOTYPE: @ 1721 PPCODE:
1722{
1723 struct coro *coro;
1724 for (coro = coro_first; coro; coro = coro->next)
1725 if (coro->hv)
1726 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1727}
1728
1729void
1730call (Coro::State coro, SV *coderef)
1731 ALIAS:
1732 eval = 1
1733 CODE:
1734{
1735 if (coro->mainstack)
1736 {
1737 struct coro temp;
1738
1739 if (!(coro->flags & CF_RUNNING))
1740 {
1741 PUTBACK;
1742 save_perl (aTHX_ &temp);
1743 load_perl (aTHX_ coro);
1744 }
1745
1746 {
1747 dSP;
1748 ENTER;
1749 SAVETMPS;
1750 PUTBACK;
1751 PUSHSTACK;
1752 PUSHMARK (SP);
1753
1754 if (ix)
1755 eval_sv (coderef, 0);
1756 else
1757 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1758
1759 POPSTACK;
1760 SPAGAIN;
1761 FREETMPS;
1762 LEAVE;
1763 PUTBACK;
1764 }
1765
1766 if (!(coro->flags & CF_RUNNING))
1767 {
1768 save_perl (aTHX_ coro);
1769 load_perl (aTHX_ &temp);
1770 SPAGAIN;
1771 }
1772 }
1773}
1774
1775SV *
1776is_ready (Coro::State coro)
1777 PROTOTYPE: $
1778 ALIAS:
1779 is_ready = CF_READY
1780 is_running = CF_RUNNING
1781 is_new = CF_NEW
1782 is_destroyed = CF_DESTROYED
1783 CODE:
1784 RETVAL = boolSV (coro->flags & ix);
1785 OUTPUT:
1786 RETVAL
1787
1788void
1789api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1790
1791SV *
1792has_stack (Coro::State coro)
1793 PROTOTYPE: $
1794 CODE:
1795 RETVAL = boolSV (!!coro->cctx);
1796 OUTPUT:
1797 RETVAL
1798
1799int
1800is_traced (Coro::State coro)
1801 PROTOTYPE: $
1802 CODE:
1803 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1804 OUTPUT:
1805 RETVAL
1806
1807IV
1808rss (Coro::State coro)
1809 PROTOTYPE: $
1810 ALIAS:
1811 usecount = 1
986 CODE: 1812 CODE:
987 static SV *returnstk; 1813 switch (ix)
988 SV *sv; 1814 {
989 AV *defav = GvAV (PL_defgv); 1815 case 0: RETVAL = coro_rss (aTHX_ coro); break;
990 struct coro *prev, *next; 1816 case 1: RETVAL = coro->usecount; break;
1817 }
1818 OUTPUT:
1819 RETVAL
991 1820
992 if (!returnstk) 1821void
993 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 1822force_cctx ()
994 1823 CODE:
995 /* set up @_ -- ugly */ 1824 struct coro *coro = SvSTATE (coro_current);
996 av_clear (defav); 1825 coro->cctx->idle_sp = 0;
997 av_fill (defav, items - 1);
998 while (items--)
999 av_store (defav, items, SvREFCNT_inc (ST(items)));
1000
1001 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1002 sv = av_pop ((AV *)SvRV (returnstk));
1003 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1004 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1005 SvREFCNT_dec (sv);
1006
1007 transfer(aTHX_ prev, next, 0);
1008 1826
1009MODULE = Coro::State PACKAGE = Coro 1827MODULE = Coro::State PACKAGE = Coro
1010 1828
1011# this is slightly dirty (should expose a c-level api)
1012
1013BOOT: 1829BOOT:
1014{ 1830{
1015 int i; 1831 int i;
1832
1833 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1834 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
1835 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
1836
1837 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
1838 SvREADONLY_on (coro_current);
1839
1016 HV *stash = gv_stashpv ("Coro", TRUE); 1840 coro_stash = gv_stashpv ("Coro", TRUE);
1017 1841
1018 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1842 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1019 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1843 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1020 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1844 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1021 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1845 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1022 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1846 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1023 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1847 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1024
1025 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1026 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1027 1848
1028 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1849 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1029 coro_ready[i] = newAV (); 1850 coro_ready[i] = newAV ();
1030 1851
1031 { 1852 {
1032 SV *sv = perl_get_sv("Coro::API", 1); 1853 SV *sv = perl_get_sv ("Coro::API", TRUE);
1854 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1033 1855
1034 coroapi.schedule = api_schedule; 1856 coroapi.schedule = api_schedule;
1857 coroapi.cede = api_cede;
1858 coroapi.cede_notself = api_cede_notself;
1035 coroapi.ready = api_ready; 1859 coroapi.ready = api_ready;
1860 coroapi.is_ready = api_is_ready;
1036 coroapi.nready = &coro_nready; 1861 coroapi.nready = &coro_nready;
1037 coroapi.current = coro_current; 1862 coroapi.current = coro_current;
1038 1863
1039 GCoroAPI = &coroapi; 1864 GCoroAPI = &coroapi;
1040 sv_setiv(sv, (IV)&coroapi); 1865 sv_setiv (sv, (IV)&coroapi);
1041 SvREADONLY_on(sv); 1866 SvREADONLY_on (sv);
1042 } 1867 }
1043} 1868}
1044 1869
1045void 1870void
1046ready(self) 1871_set_current (SV *current)
1047 SV * self 1872 PROTOTYPE: $
1048 CODE: 1873 CODE:
1049 api_ready (self); 1874 SvREFCNT_dec (SvRV (coro_current));
1875 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1050 1876
1051int 1877int
1878prio (Coro::State coro, int newprio = 0)
1879 ALIAS:
1880 nice = 1
1881 CODE:
1882{
1883 RETVAL = coro->prio;
1884
1885 if (items > 1)
1886 {
1887 if (ix)
1888 newprio = coro->prio - newprio;
1889
1890 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1891 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1892
1893 coro->prio = newprio;
1894 }
1895}
1896 OUTPUT:
1897 RETVAL
1898
1899SV *
1900ready (SV *self)
1901 PROTOTYPE: $
1902 CODE:
1903 RETVAL = boolSV (api_ready (self));
1904 OUTPUT:
1905 RETVAL
1906
1907int
1052nready(...) 1908nready (...)
1053 PROTOTYPE: 1909 PROTOTYPE:
1054 CODE: 1910 CODE:
1055 RETVAL = coro_nready; 1911 RETVAL = coro_nready;
1056 OUTPUT: 1912 OUTPUT:
1057 RETVAL 1913 RETVAL
1058 1914
1059void 1915void
1060schedule(...) 1916throw (Coro::State self, SV *throw = &PL_sv_undef)
1917 PROTOTYPE: $;$
1918 CODE:
1919 SvREFCNT_dec (self->throw);
1920 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1921
1922void
1923swap_defsv (Coro::State self)
1061 PROTOTYPE: 1924 PROTOTYPE: $
1062 ALIAS: 1925 ALIAS:
1063 cede = 1 1926 swap_defav = 1
1927 CODE:
1928 if (!self->slot)
1929 croak ("cannot swap state with coroutine that has no saved state");
1930 else
1931 {
1932 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
1933 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1934
1935 SV *tmp = *src; *src = *dst; *dst = tmp;
1936 }
1937
1938# for async_pool speedup
1939void
1940_pool_1 (SV *cb)
1064 CODE: 1941 CODE:
1065 api_schedule (ix); 1942{
1943 struct coro *coro = SvSTATE (coro_current);
1944 HV *hv = (HV *)SvRV (coro_current);
1945 AV *defav = GvAV (PL_defgv);
1946 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1947 AV *invoke_av;
1948 int i, len;
1066 1949
1950 if (!invoke)
1951 {
1952 SvREFCNT_dec (PL_diehook); PL_diehook = 0;
1953 croak ("\3async_pool terminate\2\n");
1954 }
1955
1956 SvREFCNT_dec (coro->saved_deffh);
1957 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
1958
1959 hv_store (hv, "desc", sizeof ("desc") - 1,
1960 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1961
1962 invoke_av = (AV *)SvRV (invoke);
1963 len = av_len (invoke_av);
1964
1965 sv_setsv (cb, AvARRAY (invoke_av)[0]);
1966
1967 if (len > 0)
1968 {
1969 av_fill (defav, len - 1);
1970 for (i = 0; i < len; ++i)
1971 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
1972 }
1973
1974 SvREFCNT_dec (invoke);
1975}
1976
1977void
1978_pool_2 (SV *cb)
1979 CODE:
1980{
1981 struct coro *coro = SvSTATE (coro_current);
1982
1983 sv_setsv (cb, &PL_sv_undef);
1984
1985 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1986 coro->saved_deffh = 0;
1987
1988 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1989 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1990 {
1991 SvREFCNT_dec (PL_diehook); PL_diehook = 0;
1992 croak ("\3async_pool terminate\2\n");
1993 }
1994
1995 av_clear (GvAV (PL_defgv));
1996 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1997 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1998
1999 coro->prio = 0;
2000
2001 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2002 api_trace (coro_current, 0);
2003
2004 av_push (av_async_pool, newSVsv (coro_current));
2005}
2006
2007
2008MODULE = Coro::State PACKAGE = Coro::AIO
2009
2010SV *
2011_get_state ()
2012 CODE:
2013{
2014 struct io_state *data;
2015
2016 RETVAL = newSV (sizeof (struct io_state));
2017 data = (struct io_state *)SvPVX (RETVAL);
2018 SvCUR_set (RETVAL, sizeof (struct io_state));
2019 SvPOK_only (RETVAL);
2020
2021 data->errorno = errno;
2022 data->laststype = PL_laststype;
2023 data->laststatval = PL_laststatval;
2024 data->statcache = PL_statcache;
2025}
2026 OUTPUT:
2027 RETVAL
2028
2029void
2030_set_state (char *data_)
2031 PROTOTYPE: $
2032 CODE:
2033{
2034 struct io_state *data = (void *)data_;
2035
2036 errno = data->errorno;
2037 PL_laststype = data->laststype;
2038 PL_laststatval = data->laststatval;
2039 PL_statcache = data->statcache;
2040}
2041

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