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Comparing Coro/Coro/State.xs (file contents):
Revision 1.36 by root, Fri Oct 5 14:20:10 2001 UTC vs.
Revision 1.235 by root, Sat May 10 00:13:18 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_ANONYMOUS 28# ifndef MAP_ANONYMOUS
… …
14# define MAP_ANONYMOUS 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
176/* Coro::AnyEvent */
177static SV *sv_activity;
178
179static struct coro_cctx *cctx_first;
180static int cctx_count, cctx_idle;
181
182enum {
183 CC_MAPPED = 0x01,
184 CC_NOREUSE = 0x02, /* throw this away after tracing */
185 CC_TRACE = 0x04,
186 CC_TRACE_SUB = 0x08, /* trace sub calls */
187 CC_TRACE_LINE = 0x10, /* trace each statement */
188 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
189};
190
191/* this is a structure representing a c-level coroutine */
192typedef struct coro_cctx {
193 struct coro_cctx *next;
194
195 /* the stack */
196 void *sptr;
197 size_t ssize;
198
199 /* cpu state */
200 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
201 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
202 JMPENV *top_env;
203 coro_context cctx;
204
205#if CORO_USE_VALGRIND
206 int valgrind_id;
207#endif
208 unsigned char flags;
209} coro_cctx;
210
211enum {
212 CF_RUNNING = 0x0001, /* coroutine is running */
213 CF_READY = 0x0002, /* coroutine is ready */
214 CF_NEW = 0x0004, /* has never been switched to */
215 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
216};
217
218/* the structure where most of the perl state is stored, overlaid on the cxstack */
40typedef struct { 219typedef struct {
41 int refcnt; /* pointer reference counter */ 220 SV *defsv;
42 int usecnt; /* shared by how many coroutines */ 221 AV *defav;
43 int gencnt; /* generation counter */ 222 SV *errsv;
223 SV *irsgv;
224#define VAR(name,type) type name;
225# include "state.h"
226#undef VAR
227} perl_slots;
44 228
45 coro_context cctx; 229#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
46 230
47 void *sptr; 231/* this is a structure representing a perl-level coroutine */
48 long ssize; /* positive == mmap, otherwise malloc */
49} coro_stack;
50
51struct coro { 232struct coro {
52 /* the optional C context */ 233 /* the c coroutine allocated to this perl coroutine, if any */
53 coro_stack *stack; 234 coro_cctx *cctx;
54 void *cursp;
55 int gencnt;
56 235
57 /* optionally saved, might be zero */ 236 /* 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; 237 AV *mainstack;
70 SV **stack_sp; 238 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;
93 239
94 /* data associated with this coroutine (initial args) */ 240 AV *args; /* data associated with this coroutine (initial args) */
95 AV *args; 241 int refcnt; /* coroutines are refcounted, yes */
242 int flags; /* CF_ flags */
243 HV *hv; /* the perl hash associated with this coro, if any */
244
245 /* statistics */
246 int usecount; /* number of transfers to this coro */
247
248 /* coro process data */
249 int prio;
250 SV *throw; /* exception to be thrown */
251
252 /* async_pool */
253 SV *saved_deffh;
254
255 /* linked list */
256 struct coro *next, *prev;
96}; 257};
97 258
98typedef struct coro *Coro__State; 259typedef struct coro *Coro__State;
99typedef struct coro *Coro__State_or_hashref; 260typedef 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_ANONYMOUS, 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}
789 261
790/** Coro ********************************************************************/ 262/** Coro ********************************************************************/
791 263
792#define PRIO_MAX 3 264#define PRIO_MAX 3
793#define PRIO_HIGH 1 265#define PRIO_HIGH 1
… …
795#define PRIO_LOW -1 267#define PRIO_LOW -1
796#define PRIO_IDLE -3 268#define PRIO_IDLE -3
797#define PRIO_MIN -4 269#define PRIO_MIN -4
798 270
799/* for Coro.pm */ 271/* for Coro.pm */
800static GV *coro_current, *coro_idle; 272static SV *coro_current;
273static SV *coro_readyhook;
801static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 274static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
802static int coro_nready; 275static int coro_nready;
276static struct coro *coro_first;
277
278/** lowlevel stuff **********************************************************/
279
280static SV *
281coro_get_sv (pTHX_ const char *name, int create)
282{
283#if PERL_VERSION_ATLEAST (5,10,0)
284 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
285 get_sv (name, create);
286#endif
287 return get_sv (name, create);
288}
289
290static AV *
291coro_get_av (pTHX_ const char *name, int create)
292{
293#if PERL_VERSION_ATLEAST (5,10,0)
294 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
295 get_av (name, create);
296#endif
297 return get_av (name, create);
298}
299
300static HV *
301coro_get_hv (pTHX_ const char *name, int create)
302{
303#if PERL_VERSION_ATLEAST (5,10,0)
304 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
305 get_hv (name, create);
306#endif
307 return get_hv (name, create);
308}
309
310static AV *
311coro_clone_padlist (pTHX_ CV *cv)
312{
313 AV *padlist = CvPADLIST (cv);
314 AV *newpadlist, *newpad;
315
316 newpadlist = newAV ();
317 AvREAL_off (newpadlist);
318#if PERL_VERSION_ATLEAST (5,10,0)
319 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
320#else
321 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
322#endif
323 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
324 --AvFILLp (padlist);
325
326 av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
327 av_store (newpadlist, 1, (SV *)newpad);
328
329 return newpadlist;
330}
803 331
804static void 332static void
805coro_enq (SV *sv) 333free_padlist (pTHX_ AV *padlist)
806{ 334{
807 if (SvROK (sv)) 335 /* may be during global destruction */
336 if (SvREFCNT (padlist))
808 { 337 {
809 SV *hv = SvRV (sv); 338 I32 i = AvFILLp (padlist);
810 if (SvTYPE (hv) == SVt_PVHV) 339 while (i >= 0)
811 { 340 {
812 SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0); 341 SV **svp = av_fetch (padlist, i--, FALSE);
813 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 342 if (svp)
343 {
344 SV *sv;
345 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
346 SvREFCNT_dec (sv);
814 347
815 prio = prio > PRIO_MAX ? PRIO_MAX 348 SvREFCNT_dec (*svp);
816 : prio < PRIO_MIN ? PRIO_MIN 349 }
817 : prio;
818
819 av_push (coro_ready [prio - PRIO_MIN], sv);
820 coro_nready++;
821
822 return;
823 } 350 }
351
352 SvREFCNT_dec ((SV*)padlist);
353 }
354}
355
356static int
357coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
358{
359 AV *padlist;
360 AV *av = (AV *)mg->mg_obj;
361
362 /* casting is fun. */
363 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
364 free_padlist (aTHX_ padlist);
365
366 return 0;
367}
368
369#define CORO_MAGIC_type_cv PERL_MAGIC_ext
370#define CORO_MAGIC_type_state PERL_MAGIC_ext
371
372static MGVTBL coro_cv_vtbl = {
373 0, 0, 0, 0,
374 coro_cv_free
375};
376
377#define CORO_MAGIC(sv,type) \
378 SvMAGIC (sv) \
379 ? SvMAGIC (sv)->mg_type == type \
380 ? SvMAGIC (sv) \
381 : mg_find (sv, type) \
382 : 0
383
384#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
385#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
386
387static struct coro *
388SvSTATE_ (pTHX_ SV *coro)
389{
390 HV *stash;
391 MAGIC *mg;
392
393 if (SvROK (coro))
394 coro = SvRV (coro);
395
396 if (expect_false (SvTYPE (coro) != SVt_PVHV))
397 croak ("Coro::State object required");
398
399 stash = SvSTASH (coro);
400 if (expect_false (stash != coro_stash && stash != coro_state_stash))
401 {
402 /* very slow, but rare, check */
403 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
404 croak ("Coro::State object required");
405 }
406
407 mg = CORO_MAGIC_state (coro);
408 return (struct coro *)mg->mg_ptr;
409}
410
411#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
412
413/* the next two functions merely cache the padlists */
414static void
415get_padlist (pTHX_ CV *cv)
416{
417 MAGIC *mg = CORO_MAGIC_cv (cv);
418 AV *av;
419
420 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
421 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
422 else
423 {
424#if CORO_PREFER_PERL_FUNCTIONS
425 /* this is probably cleaner, but also slower? */
426 CV *cp = Perl_cv_clone (cv);
427 CvPADLIST (cv) = CvPADLIST (cp);
428 CvPADLIST (cp) = 0;
429 SvREFCNT_dec (cp);
430#else
431 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
432#endif
824 } 433 }
434}
825 435
826 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 436static void
437put_padlist (pTHX_ CV *cv)
438{
439 MAGIC *mg = CORO_MAGIC_cv (cv);
440 AV *av;
441
442 if (expect_false (!mg))
443 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
444
445 av = (AV *)mg->mg_obj;
446
447 if (expect_false (AvFILLp (av) >= AvMAX (av)))
448 av_extend (av, AvMAX (av) + 1);
449
450 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
451}
452
453/** load & save, init *******************************************************/
454
455static void
456load_perl (pTHX_ Coro__State c)
457{
458 perl_slots *slot = c->slot;
459 c->slot = 0;
460
461 PL_mainstack = c->mainstack;
462
463 GvSV (PL_defgv) = slot->defsv;
464 GvAV (PL_defgv) = slot->defav;
465 GvSV (PL_errgv) = slot->errsv;
466 GvSV (irsgv) = slot->irsgv;
467
468 #define VAR(name,type) PL_ ## name = slot->name;
469 # include "state.h"
470 #undef VAR
471
472 {
473 dSP;
474
475 CV *cv;
476
477 /* now do the ugly restore mess */
478 while (expect_true (cv = (CV *)POPs))
479 {
480 put_padlist (aTHX_ cv); /* mark this padlist as available */
481 CvDEPTH (cv) = PTR2IV (POPs);
482 CvPADLIST (cv) = (AV *)POPs;
483 }
484
485 PUTBACK;
486 }
487}
488
489static void
490save_perl (pTHX_ Coro__State c)
491{
492 {
493 dSP;
494 I32 cxix = cxstack_ix;
495 PERL_CONTEXT *ccstk = cxstack;
496 PERL_SI *top_si = PL_curstackinfo;
497
498 /*
499 * the worst thing you can imagine happens first - we have to save
500 * (and reinitialize) all cv's in the whole callchain :(
501 */
502
503 XPUSHs (Nullsv);
504 /* this loop was inspired by pp_caller */
505 for (;;)
506 {
507 while (expect_true (cxix >= 0))
508 {
509 PERL_CONTEXT *cx = &ccstk[cxix--];
510
511 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
512 {
513 CV *cv = cx->blk_sub.cv;
514
515 if (expect_true (CvDEPTH (cv)))
516 {
517 EXTEND (SP, 3);
518 PUSHs ((SV *)CvPADLIST (cv));
519 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
520 PUSHs ((SV *)cv);
521
522 CvDEPTH (cv) = 0;
523 get_padlist (aTHX_ cv);
524 }
525 }
526 }
527
528 if (expect_true (top_si->si_type == PERLSI_MAIN))
529 break;
530
531 top_si = top_si->si_prev;
532 ccstk = top_si->si_cxstack;
533 cxix = top_si->si_cxix;
534 }
535
536 PUTBACK;
537 }
538
539 /* allocate some space on the context stack for our purposes */
540 /* we manually unroll here, as usually 2 slots is enough */
541 if (SLOT_COUNT >= 1) CXINC;
542 if (SLOT_COUNT >= 2) CXINC;
543 if (SLOT_COUNT >= 3) CXINC;
544 {
545 int i;
546 for (i = 3; i < SLOT_COUNT; ++i)
547 CXINC;
548 }
549 cxstack_ix -= SLOT_COUNT; /* undo allocation */
550
551 c->mainstack = PL_mainstack;
552
553 {
554 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
555
556 slot->defav = GvAV (PL_defgv);
557 slot->defsv = DEFSV;
558 slot->errsv = ERRSV;
559 slot->irsgv = GvSV (irsgv);
560
561 #define VAR(name,type) slot->name = PL_ ## name;
562 # include "state.h"
563 #undef VAR
564 }
565}
566
567/*
568 * allocate various perl stacks. This is an exact copy
569 * of perl.c:init_stacks, except that it uses less memory
570 * on the (sometimes correct) assumption that coroutines do
571 * not usually need a lot of stackspace.
572 */
573#if CORO_PREFER_PERL_FUNCTIONS
574# define coro_init_stacks init_stacks
575#else
576static void
577coro_init_stacks (pTHX)
578{
579 PL_curstackinfo = new_stackinfo(32, 8);
580 PL_curstackinfo->si_type = PERLSI_MAIN;
581 PL_curstack = PL_curstackinfo->si_stack;
582 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
583
584 PL_stack_base = AvARRAY(PL_curstack);
585 PL_stack_sp = PL_stack_base;
586 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
587
588 New(50,PL_tmps_stack,32,SV*);
589 PL_tmps_floor = -1;
590 PL_tmps_ix = -1;
591 PL_tmps_max = 32;
592
593 New(54,PL_markstack,16,I32);
594 PL_markstack_ptr = PL_markstack;
595 PL_markstack_max = PL_markstack + 16;
596
597#ifdef SET_MARK_OFFSET
598 SET_MARK_OFFSET;
599#endif
600
601 New(54,PL_scopestack,8,I32);
602 PL_scopestack_ix = 0;
603 PL_scopestack_max = 8;
604
605 New(54,PL_savestack,24,ANY);
606 PL_savestack_ix = 0;
607 PL_savestack_max = 24;
608
609#if !PERL_VERSION_ATLEAST (5,10,0)
610 New(54,PL_retstack,4,OP*);
611 PL_retstack_ix = 0;
612 PL_retstack_max = 4;
613#endif
614}
615#endif
616
617/*
618 * destroy the stacks, the callchain etc...
619 */
620static void
621coro_destroy_stacks (pTHX)
622{
623 while (PL_curstackinfo->si_next)
624 PL_curstackinfo = PL_curstackinfo->si_next;
625
626 while (PL_curstackinfo)
627 {
628 PERL_SI *p = PL_curstackinfo->si_prev;
629
630 if (!IN_DESTRUCT)
631 SvREFCNT_dec (PL_curstackinfo->si_stack);
632
633 Safefree (PL_curstackinfo->si_cxstack);
634 Safefree (PL_curstackinfo);
635 PL_curstackinfo = p;
636 }
637
638 Safefree (PL_tmps_stack);
639 Safefree (PL_markstack);
640 Safefree (PL_scopestack);
641 Safefree (PL_savestack);
642#if !PERL_VERSION_ATLEAST (5,10,0)
643 Safefree (PL_retstack);
644#endif
645}
646
647static size_t
648coro_rss (pTHX_ struct coro *coro)
649{
650 size_t rss = sizeof (*coro);
651
652 if (coro->mainstack)
653 {
654 perl_slots tmp_slot;
655 perl_slots *slot;
656
657 if (coro->flags & CF_RUNNING)
658 {
659 slot = &tmp_slot;
660
661 #define VAR(name,type) slot->name = PL_ ## name;
662 # include "state.h"
663 #undef VAR
664 }
665 else
666 slot = coro->slot;
667
668 rss += sizeof (slot->curstackinfo);
669 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
670 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
671 rss += slot->tmps_max * sizeof (SV *);
672 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
673 rss += slot->scopestack_max * sizeof (I32);
674 rss += slot->savestack_max * sizeof (ANY);
675
676#if !PERL_VERSION_ATLEAST (5,10,0)
677 rss += slot->retstack_max * sizeof (OP *);
678#endif
679 }
680
681 return rss;
682}
683
684/** coroutine stack handling ************************************************/
685
686static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
687static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
688
689/*
690 * This overrides the default magic get method of %SIG elements.
691 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
692 * and instead of tryign to save and restore the hash elements, we just provide
693 * readback here.
694 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
695 * not expecting this to actually change the hook. This is a potential problem
696 * when a schedule happens then, but we ignore this.
697 */
698static int
699coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
700{
701 const char *s = MgPV_nolen_const (mg);
702
703 if (*s == '_')
704 {
705 if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;
706 if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;
707 }
708
709 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
710}
711
712static int
713coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
714{
715 const char *s = MgPV_nolen_const (mg);
716
717 if (*s == '_')
718 {
719 SV **svp = 0;
720
721 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
722 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
723
724 if (svp)
725 {
726 SV *old = *svp;
727 *svp = newSVsv (sv);
728 SvREFCNT_dec (old);
729 return 0;
730 }
731 }
732
733 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
734}
735
736static void
737coro_setup (pTHX_ struct coro *coro)
738{
739 /*
740 * emulate part of the perl startup here.
741 */
742 coro_init_stacks (aTHX);
743
744 PL_runops = RUNOPS_DEFAULT;
745 PL_curcop = &PL_compiling;
746 PL_in_eval = EVAL_NULL;
747 PL_comppad = 0;
748 PL_curpm = 0;
749 PL_curpad = 0;
750 PL_localizing = 0;
751 PL_dirty = 0;
752 PL_restartop = 0;
753#if PERL_VERSION_ATLEAST (5,10,0)
754 PL_parser = 0;
755#endif
756
757 /* recreate the die/warn hooks */
758 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
759 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
760
761 GvSV (PL_defgv) = newSV (0);
762 GvAV (PL_defgv) = coro->args; coro->args = 0;
763 GvSV (PL_errgv) = newSV (0);
764 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
765 PL_rs = newSVsv (GvSV (irsgv));
766 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
767
768 {
769 dSP;
770 LOGOP myop;
771
772 Zero (&myop, 1, LOGOP);
773 myop.op_next = Nullop;
774 myop.op_flags = OPf_WANT_VOID;
775
776 PUSHMARK (SP);
777 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
778 PUTBACK;
779 PL_op = (OP *)&myop;
780 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
781 SPAGAIN;
782 }
783
784 /* this newly created coroutine might be run on an existing cctx which most
785 * likely was suspended in set_stacklevel, called from entersub.
786 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
787 * so we ENTER here for symmetry
788 */
789 ENTER;
790}
791
792static void
793coro_destroy (pTHX_ struct coro *coro)
794{
795 if (!IN_DESTRUCT)
796 {
797 /* restore all saved variables and stuff */
798 LEAVE_SCOPE (0);
799 assert (PL_tmps_floor == -1);
800
801 /* free all temporaries */
802 FREETMPS;
803 assert (PL_tmps_ix == -1);
804
805 /* unwind all extra stacks */
806 POPSTACK_TO (PL_mainstack);
807
808 /* unwind main stack */
809 dounwind (-1);
810 }
811
812 SvREFCNT_dec (GvSV (PL_defgv));
813 SvREFCNT_dec (GvAV (PL_defgv));
814 SvREFCNT_dec (GvSV (PL_errgv));
815 SvREFCNT_dec (PL_defoutgv);
816 SvREFCNT_dec (PL_rs);
817 SvREFCNT_dec (GvSV (irsgv));
818
819 SvREFCNT_dec (PL_diehook);
820 SvREFCNT_dec (PL_warnhook);
821
822 SvREFCNT_dec (coro->saved_deffh);
823 SvREFCNT_dec (coro->throw);
824
825 coro_destroy_stacks (aTHX);
826}
827
828static void
829free_coro_mortal (pTHX)
830{
831 if (expect_true (coro_mortal))
832 {
833 SvREFCNT_dec (coro_mortal);
834 coro_mortal = 0;
835 }
836}
837
838static int
839runops_trace (pTHX)
840{
841 COP *oldcop = 0;
842 int oldcxix = -2;
843 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
844 coro_cctx *cctx = coro->cctx;
845
846 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
847 {
848 PERL_ASYNC_CHECK ();
849
850 if (cctx->flags & CC_TRACE_ALL)
851 {
852 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
853 {
854 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
855 SV **bot, **top;
856 AV *av = newAV (); /* return values */
857 SV **cb;
858 dSP;
859
860 GV *gv = CvGV (cx->blk_sub.cv);
861 SV *fullname = sv_2mortal (newSV (0));
862 if (isGV (gv))
863 gv_efullname3 (fullname, gv, 0);
864
865 bot = PL_stack_base + cx->blk_oldsp + 1;
866 top = cx->blk_gimme == G_ARRAY ? SP + 1
867 : cx->blk_gimme == G_SCALAR ? bot + 1
868 : bot;
869
870 av_extend (av, top - bot);
871 while (bot < top)
872 av_push (av, SvREFCNT_inc (*bot++));
873
874 PL_runops = RUNOPS_DEFAULT;
875 ENTER;
876 SAVETMPS;
877 EXTEND (SP, 3);
878 PUSHMARK (SP);
879 PUSHs (&PL_sv_no);
880 PUSHs (fullname);
881 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
882 PUTBACK;
883 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
884 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
885 SPAGAIN;
886 FREETMPS;
887 LEAVE;
888 PL_runops = runops_trace;
889 }
890
891 if (oldcop != PL_curcop)
892 {
893 oldcop = PL_curcop;
894
895 if (PL_curcop != &PL_compiling)
896 {
897 SV **cb;
898
899 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
900 {
901 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
902
903 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
904 {
905 runops_proc_t old_runops = PL_runops;
906 dSP;
907 GV *gv = CvGV (cx->blk_sub.cv);
908 SV *fullname = sv_2mortal (newSV (0));
909
910 if (isGV (gv))
911 gv_efullname3 (fullname, gv, 0);
912
913 PL_runops = RUNOPS_DEFAULT;
914 ENTER;
915 SAVETMPS;
916 EXTEND (SP, 3);
917 PUSHMARK (SP);
918 PUSHs (&PL_sv_yes);
919 PUSHs (fullname);
920 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
921 PUTBACK;
922 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
923 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
924 SPAGAIN;
925 FREETMPS;
926 LEAVE;
927 PL_runops = runops_trace;
928 }
929
930 oldcxix = cxstack_ix;
931 }
932
933 if (cctx->flags & CC_TRACE_LINE)
934 {
935 dSP;
936
937 PL_runops = RUNOPS_DEFAULT;
938 ENTER;
939 SAVETMPS;
940 EXTEND (SP, 3);
941 PL_runops = RUNOPS_DEFAULT;
942 PUSHMARK (SP);
943 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
944 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
945 PUTBACK;
946 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
947 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
948 SPAGAIN;
949 FREETMPS;
950 LEAVE;
951 PL_runops = runops_trace;
952 }
953 }
954 }
955 }
956 }
957
958 TAINT_NOT;
959 return 0;
960}
961
962/* inject a fake call to Coro::State::_cctx_init into the execution */
963/* _cctx_init should be careful, as it could be called at almost any time */
964/* during execution of a perl program */
965static void NOINLINE
966cctx_prepare (pTHX_ coro_cctx *cctx)
967{
968 dSP;
969 LOGOP myop;
970
971 PL_top_env = &PL_start_env;
972
973 if (cctx->flags & CC_TRACE)
974 PL_runops = runops_trace;
975
976 Zero (&myop, 1, LOGOP);
977 myop.op_next = PL_op;
978 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
979
980 PUSHMARK (SP);
981 EXTEND (SP, 2);
982 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
983 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
984 PUTBACK;
985 PL_op = (OP *)&myop;
986 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
987 SPAGAIN;
988}
989
990/*
991 * this is a _very_ stripped down perl interpreter ;)
992 */
993static void
994cctx_run (void *arg)
995{
996 dTHX;
997
998 /* cctx_run is the alternative tail of transfer(), so unlock here. */
999 UNLOCK;
1000
1001 /* we now skip the entersub that lead to transfer() */
1002 PL_op = PL_op->op_next;
1003
1004 /* inject a fake subroutine call to cctx_init */
1005 cctx_prepare (aTHX_ (coro_cctx *)arg);
1006
1007 /* somebody or something will hit me for both perl_run and PL_restartop */
1008 PL_restartop = PL_op;
1009 perl_run (PL_curinterp);
1010
1011 /*
1012 * If perl-run returns we assume exit() was being called or the coro
1013 * fell off the end, which seems to be the only valid (non-bug)
1014 * reason for perl_run to return. We try to exit by jumping to the
1015 * bootstrap-time "top" top_env, as we cannot restore the "main"
1016 * coroutine as Coro has no such concept
1017 */
1018 PL_top_env = main_top_env;
1019 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1020}
1021
1022static coro_cctx *
1023cctx_new ()
1024{
1025 coro_cctx *cctx;
1026 void *stack_start;
1027 size_t stack_size;
1028
1029 ++cctx_count;
1030
1031 Newz (0, cctx, 1, coro_cctx);
1032
1033#if HAVE_MMAP
1034 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1035 /* mmap supposedly does allocate-on-write for us */
1036 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1037
1038 if (cctx->sptr != (void *)-1)
1039 {
1040# if CORO_STACKGUARD
1041 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1042# endif
1043 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
1044 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1045 cctx->flags |= CC_MAPPED;
1046 }
1047 else
1048#endif
1049 {
1050 cctx->ssize = coro_stacksize * (long)sizeof (long);
1051 New (0, cctx->sptr, coro_stacksize, long);
1052
1053 if (!cctx->sptr)
1054 {
1055 perror ("FATAL: unable to allocate stack for coroutine");
1056 _exit (EXIT_FAILURE);
1057 }
1058
1059 stack_start = cctx->sptr;
1060 stack_size = cctx->ssize;
1061 }
1062
1063 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1064 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1065
1066 return cctx;
1067}
1068
1069static void
1070cctx_destroy (coro_cctx *cctx)
1071{
1072 if (!cctx)
1073 return;
1074
1075 --cctx_count;
1076
1077#if CORO_USE_VALGRIND
1078 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1079#endif
1080
1081#if HAVE_MMAP
1082 if (cctx->flags & CC_MAPPED)
1083 munmap (cctx->sptr, cctx->ssize);
1084 else
1085#endif
1086 Safefree (cctx->sptr);
1087
1088 Safefree (cctx);
1089}
1090
1091/* wether this cctx should be destructed */
1092#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
1093
1094static coro_cctx *
1095cctx_get (pTHX)
1096{
1097 while (expect_true (cctx_first))
1098 {
1099 coro_cctx *cctx = cctx_first;
1100 cctx_first = cctx->next;
1101 --cctx_idle;
1102
1103 if (expect_true (!CCTX_EXPIRED (cctx)))
1104 return cctx;
1105
1106 cctx_destroy (cctx);
1107 }
1108
1109 return cctx_new ();
1110}
1111
1112static void
1113cctx_put (coro_cctx *cctx)
1114{
1115 /* free another cctx if overlimit */
1116 if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
1117 {
1118 coro_cctx *first = cctx_first;
1119 cctx_first = first->next;
1120 --cctx_idle;
1121
1122 cctx_destroy (first);
1123 }
1124
1125 ++cctx_idle;
1126 cctx->next = cctx_first;
1127 cctx_first = cctx;
1128}
1129
1130/** coroutine switching *****************************************************/
1131
1132static void
1133transfer_check (pTHX_ struct coro *prev, struct coro *next)
1134{
1135 if (expect_true (prev != next))
1136 {
1137 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1138 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1139
1140 if (expect_false (next->flags & CF_RUNNING))
1141 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1142
1143 if (expect_false (next->flags & CF_DESTROYED))
1144 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1145
1146#if !PERL_VERSION_ATLEAST (5,10,0)
1147 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1148 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1149#endif
1150 }
1151}
1152
1153/* always use the TRANSFER macro */
1154static void NOINLINE
1155transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1156{
1157 dSTACKLEVEL;
1158 static volatile int has_throw;
1159
1160 /* sometimes transfer is only called to set idle_sp */
1161 if (expect_false (!next))
1162 {
1163 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1164 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1165 }
1166 else if (expect_true (prev != next))
1167 {
1168 coro_cctx *prev__cctx;
1169
1170 if (expect_false (prev->flags & CF_NEW))
1171 {
1172 /* create a new empty context */
1173 Newz (0, prev->cctx, 1, coro_cctx);
1174 prev->flags &= ~CF_NEW;
1175 prev->flags |= CF_RUNNING;
1176 }
1177
1178 prev->flags &= ~CF_RUNNING;
1179 next->flags |= CF_RUNNING;
1180
1181 LOCK;
1182
1183 /* first get rid of the old state */
1184 save_perl (aTHX_ prev);
1185
1186 if (expect_false (next->flags & CF_NEW))
1187 {
1188 /* need to start coroutine */
1189 next->flags &= ~CF_NEW;
1190 /* setup coroutine call */
1191 coro_setup (aTHX_ next);
1192 }
1193 else
1194 load_perl (aTHX_ next);
1195
1196 prev__cctx = prev->cctx;
1197
1198 /* possibly "free" the cctx */
1199 if (expect_true (
1200 prev__cctx->idle_sp == STACKLEVEL
1201 && !(prev__cctx->flags & CC_TRACE)
1202 && !force_cctx
1203 ))
1204 {
1205 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1206 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
1207
1208 prev->cctx = 0;
1209
1210 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1211 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1212 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1213 if (!next->cctx)
1214 next->cctx = cctx_get (aTHX);
1215
1216 cctx_put (prev__cctx);
1217 }
1218
1219 ++next->usecount;
1220
1221 if (expect_true (!next->cctx))
1222 next->cctx = cctx_get (aTHX);
1223
1224 has_throw = !!next->throw;
1225
1226 if (expect_false (prev__cctx != next->cctx))
1227 {
1228 prev__cctx->top_env = PL_top_env;
1229 PL_top_env = next->cctx->top_env;
1230 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1231 }
1232
1233 free_coro_mortal (aTHX);
1234 UNLOCK;
1235
1236 if (expect_false (has_throw))
1237 {
1238 struct coro *coro = SvSTATE (coro_current);
1239
1240 if (coro->throw)
1241 {
1242 SV *exception = coro->throw;
1243 coro->throw = 0;
1244 sv_setsv (ERRSV, exception);
1245 croak (0);
1246 }
1247 }
1248 }
1249}
1250
1251struct transfer_args
1252{
1253 struct coro *prev, *next;
1254};
1255
1256#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1257#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1258
1259/** high level stuff ********************************************************/
1260
1261static int
1262coro_state_destroy (pTHX_ struct coro *coro)
1263{
1264 if (coro->flags & CF_DESTROYED)
1265 return 0;
1266
1267 coro->flags |= CF_DESTROYED;
1268
1269 if (coro->flags & CF_READY)
1270 {
1271 /* reduce nready, as destroying a ready coro effectively unreadies it */
1272 /* alternative: look through all ready queues and remove the coro */
1273 LOCK;
1274 --coro_nready;
1275 UNLOCK;
1276 }
1277 else
1278 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1279
1280 if (coro->mainstack && coro->mainstack != main_mainstack)
1281 {
1282 struct coro temp;
1283
1284 if (coro->flags & CF_RUNNING)
1285 croak ("FATAL: tried to destroy currently running coroutine");
1286
1287 save_perl (aTHX_ &temp);
1288 load_perl (aTHX_ coro);
1289
1290 coro_destroy (aTHX_ coro);
1291
1292 load_perl (aTHX_ &temp);
1293
1294 coro->slot = 0;
1295 }
1296
1297 cctx_destroy (coro->cctx);
1298 SvREFCNT_dec (coro->args);
1299
1300 if (coro->next) coro->next->prev = coro->prev;
1301 if (coro->prev) coro->prev->next = coro->next;
1302 if (coro == coro_first) coro_first = coro->next;
1303
1304 return 1;
1305}
1306
1307static int
1308coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1309{
1310 struct coro *coro = (struct coro *)mg->mg_ptr;
1311 mg->mg_ptr = 0;
1312
1313 coro->hv = 0;
1314
1315 if (--coro->refcnt < 0)
1316 {
1317 coro_state_destroy (aTHX_ coro);
1318 Safefree (coro);
1319 }
1320
1321 return 0;
1322}
1323
1324static int
1325coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1326{
1327 struct coro *coro = (struct coro *)mg->mg_ptr;
1328
1329 ++coro->refcnt;
1330
1331 return 0;
1332}
1333
1334static MGVTBL coro_state_vtbl = {
1335 0, 0, 0, 0,
1336 coro_state_free,
1337 0,
1338#ifdef MGf_DUP
1339 coro_state_dup,
1340#else
1341# define MGf_DUP 0
1342#endif
1343};
1344
1345static void
1346prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1347{
1348 ta->prev = SvSTATE (prev_sv);
1349 ta->next = SvSTATE (next_sv);
1350 TRANSFER_CHECK (*ta);
1351}
1352
1353static void
1354api_transfer (SV *prev_sv, SV *next_sv)
1355{
1356 dTHX;
1357 struct transfer_args ta;
1358
1359 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1360 TRANSFER (ta, 1);
1361}
1362
1363/** Coro ********************************************************************/
1364
1365static void
1366coro_enq (pTHX_ SV *coro_sv)
1367{
1368 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
827} 1369}
828 1370
829static SV * 1371static SV *
830coro_deq (int min_prio) 1372coro_deq (pTHX)
831{ 1373{
832 int prio = PRIO_MAX - PRIO_MIN; 1374 int prio;
833 1375
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; ) 1376 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
839 if (av_len (coro_ready[prio]) >= 0) 1377 if (AvFILLp (coro_ready [prio]) >= 0)
840 {
841 coro_nready--;
842 return av_shift (coro_ready[prio]); 1378 return av_shift (coro_ready [prio]);
843 }
844 1379
845 return 0; 1380 return 0;
846} 1381}
847 1382
1383static int
1384api_ready (SV *coro_sv)
1385{
1386 dTHX;
1387 struct coro *coro;
1388 SV *hook;
1389
1390 if (SvROK (coro_sv))
1391 coro_sv = SvRV (coro_sv);
1392
1393 coro = SvSTATE (coro_sv);
1394
1395 if (coro->flags & CF_READY)
1396 return 0;
1397
1398 coro->flags |= CF_READY;
1399
1400 LOCK;
1401
1402 hook = coro_nready ? 0 : coro_readyhook;
1403
1404 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1405 ++coro_nready;
1406
1407 UNLOCK;
1408
1409 if (hook)
1410 {
1411 dSP;
1412
1413 ENTER;
1414 SAVETMPS;
1415
1416 PUSHMARK (SP);
1417 PUTBACK;
1418 call_sv (hook, G_DISCARD);
1419 SPAGAIN;
1420
1421 FREETMPS;
1422 LEAVE;
1423 }
1424
1425 return 1;
1426}
1427
1428static int
1429api_is_ready (SV *coro_sv)
1430{
1431 dTHX;
1432 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1433}
1434
848static void 1435static void
849api_ready (SV *coro) 1436prepare_schedule (pTHX_ struct transfer_args *ta)
850{ 1437{
851 coro_enq (SvREFCNT_inc (coro)); 1438 SV *prev_sv, *next_sv;
1439
1440 for (;;)
1441 {
1442 LOCK;
1443 next_sv = coro_deq (aTHX);
1444
1445 /* nothing to schedule: call the idle handler */
1446 if (expect_false (!next_sv))
1447 {
1448 dSP;
1449 UNLOCK;
1450
1451 ENTER;
1452 SAVETMPS;
1453
1454 PUSHMARK (SP);
1455 PUTBACK;
1456 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1457 SPAGAIN;
1458
1459 FREETMPS;
1460 LEAVE;
1461 continue;
1462 }
1463
1464 ta->next = SvSTATE (next_sv);
1465
1466 /* cannot transfer to destroyed coros, skip and look for next */
1467 if (expect_false (ta->next->flags & CF_DESTROYED))
1468 {
1469 UNLOCK;
1470 SvREFCNT_dec (next_sv);
1471 /* coro_nready is already taken care of by destroy */
1472 continue;
1473 }
1474
1475 --coro_nready;
1476 UNLOCK;
1477 break;
1478 }
1479
1480 /* free this only after the transfer */
1481 prev_sv = SvRV (coro_current);
1482 ta->prev = SvSTATE (prev_sv);
1483 TRANSFER_CHECK (*ta);
1484 assert (ta->next->flags & CF_READY);
1485 ta->next->flags &= ~CF_READY;
1486 SvRV_set (coro_current, next_sv);
1487
1488 LOCK;
1489 free_coro_mortal (aTHX);
1490 coro_mortal = prev_sv;
1491 UNLOCK;
852} 1492}
853 1493
854static void 1494static void
855api_schedule (int cede) 1495prepare_cede (pTHX_ struct transfer_args *ta)
856{ 1496{
857 SV *prev, *next; 1497 api_ready (coro_current);
1498 prepare_schedule (aTHX_ ta);
1499}
858 1500
1501static int
1502prepare_cede_notself (pTHX_ struct transfer_args *ta)
1503{
1504 if (coro_nready)
1505 {
859 prev = GvSV (coro_current); 1506 SV *prev = SvRV (coro_current);
860 1507 prepare_schedule (aTHX_ ta);
861 if (cede) 1508 api_ready (prev);
862 coro_enq (SvREFCNT_inc (prev)); 1509 return 1;
863 1510 }
864 next = coro_deq (PRIO_MIN); 1511 else
865 1512 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} 1513}
877 1514
1515static void
1516api_schedule (void)
1517{
1518 dTHX;
1519 struct transfer_args ta;
1520
1521 prepare_schedule (aTHX_ &ta);
1522 TRANSFER (ta, 1);
1523}
1524
1525static int
1526api_cede (void)
1527{
1528 dTHX;
1529 struct transfer_args ta;
1530
1531 prepare_cede (aTHX_ &ta);
1532
1533 if (expect_true (ta.prev != ta.next))
1534 {
1535 TRANSFER (ta, 1);
1536 return 1;
1537 }
1538 else
1539 return 0;
1540}
1541
1542static int
1543api_cede_notself (void)
1544{
1545 dTHX;
1546 struct transfer_args ta;
1547
1548 if (prepare_cede_notself (aTHX_ &ta))
1549 {
1550 TRANSFER (ta, 1);
1551 return 1;
1552 }
1553 else
1554 return 0;
1555}
1556
1557static void
1558api_trace (SV *coro_sv, int flags)
1559{
1560 dTHX;
1561 struct coro *coro = SvSTATE (coro_sv);
1562
1563 if (flags & CC_TRACE)
1564 {
1565 if (!coro->cctx)
1566 coro->cctx = cctx_new ();
1567 else if (!(coro->cctx->flags & CC_TRACE))
1568 croak ("cannot enable tracing on coroutine with custom stack");
1569
1570 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1571 }
1572 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1573 {
1574 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1575
1576 if (coro->flags & CF_RUNNING)
1577 PL_runops = RUNOPS_DEFAULT;
1578 else
1579 coro->slot->runops = RUNOPS_DEFAULT;
1580 }
1581}
1582
878MODULE = Coro::State PACKAGE = Coro::State 1583MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
879 1584
880PROTOTYPES: ENABLE 1585PROTOTYPES: DISABLE
881 1586
882BOOT: 1587BOOT:
883{ /* {} necessary for stoopid perl-5.6.x */ 1588{
884 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 1589#ifdef USE_ITHREADS
885 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 1590 MUTEX_INIT (&coro_mutex);
1591#endif
1592 BOOT_PAGESIZE;
1593
1594 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1595 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1596
1597 orig_sigelem_get = PL_vtbl_sigelem.svt_get;
1598 PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1599 orig_sigelem_set = PL_vtbl_sigelem.svt_set;
1600 PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1601
1602 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1603 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1604 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1605
886 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1606 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
887 1607
888 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1608 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
889 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1609 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
890 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1610 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
891 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1611 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
892
893 if (!padlist_cache)
894 padlist_cache = newHV ();
895 1612
896 main_mainstack = PL_mainstack; 1613 main_mainstack = PL_mainstack;
1614 main_top_env = PL_top_env;
1615
1616 while (main_top_env->je_prev)
1617 main_top_env = main_top_env->je_prev;
897 1618
898 coroapi.ver = CORO_API_VERSION; 1619 coroapi.ver = CORO_API_VERSION;
1620 coroapi.rev = CORO_API_REVISION;
899 coroapi.transfer = api_transfer; 1621 coroapi.transfer = api_transfer;
900}
901 1622
902Coro::State 1623 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
903_newprocess(args) 1624}
904 SV * args 1625
905 PROTOTYPE: $ 1626SV *
1627new (char *klass, ...)
906 CODE: 1628 CODE:
907 Coro__State coro; 1629{
1630 struct coro *coro;
1631 MAGIC *mg;
1632 HV *hv;
1633 int i;
908 1634
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); 1635 Newz (0, coro, 1, struct coro);
1636 coro->args = newAV ();
1637 coro->flags = CF_NEW;
913 1638
914 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1639 if (coro_first) coro_first->prev = coro;
915 coro->mainstack = 0; /* actual work is done inside transfer */ 1640 coro->next = coro_first;
916 coro->stack = 0; 1641 coro_first = coro;
917 1642
918 RETVAL = coro; 1643 coro->hv = hv = newHV ();
1644 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1645 mg->mg_flags |= MGf_DUP;
1646 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1647
1648 av_extend (coro->args, items - 1);
1649 for (i = 1; i < items; i++)
1650 av_push (coro->args, newSVsv (ST (i)));
1651}
919 OUTPUT: 1652 OUTPUT:
920 RETVAL 1653 RETVAL
921 1654
1655# these not obviously related functions are all rolled into the same xs
1656# function to increase chances that they all will call transfer with the same
1657# stack offset
922void 1658void
923transfer(prev, next, flags) 1659_set_stacklevel (...)
924 Coro::State_or_hashref prev 1660 ALIAS:
925 Coro::State_or_hashref next 1661 Coro::State::transfer = 1
926 int flags 1662 Coro::schedule = 2
927 PROTOTYPE: @ 1663 Coro::cede = 3
1664 Coro::cede_notself = 4
928 CODE: 1665 CODE:
1666{
1667 struct transfer_args ta;
1668
929 PUTBACK; 1669 PUTBACK;
930 transfer (aTHX_ prev, next, flags); 1670 switch (ix)
1671 {
1672 case 0:
1673 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1674 ta.next = 0;
1675 break;
1676
1677 case 1:
1678 if (items != 2)
1679 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1680
1681 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1682 break;
1683
1684 case 2:
1685 prepare_schedule (aTHX_ &ta);
1686 break;
1687
1688 case 3:
1689 prepare_cede (aTHX_ &ta);
1690 break;
1691
1692 case 4:
1693 if (!prepare_cede_notself (aTHX_ &ta))
1694 XSRETURN_EMPTY;
1695
1696 break;
1697 }
931 SPAGAIN; 1698 SPAGAIN;
932 1699
1700 BARRIER;
1701 PUTBACK;
1702 TRANSFER (ta, 0);
1703 SPAGAIN; /* might be the sp of a different coroutine now */
1704 /* be extra careful not to ever do anything after TRANSFER */
1705}
1706
1707bool
1708_destroy (SV *coro_sv)
1709 CODE:
1710 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1711 OUTPUT:
1712 RETVAL
1713
933void 1714void
934DESTROY(coro) 1715_exit (int code)
935 Coro::State coro 1716 PROTOTYPE: $
936 CODE: 1717 CODE:
1718 _exit (code);
937 1719
938 if (coro->mainstack && coro->mainstack != main_mainstack) 1720int
1721cctx_stacksize (int new_stacksize = 0)
1722 CODE:
1723 RETVAL = coro_stacksize;
1724 if (new_stacksize)
1725 coro_stacksize = new_stacksize;
1726 OUTPUT:
1727 RETVAL
1728
1729int
1730cctx_count ()
1731 CODE:
1732 RETVAL = cctx_count;
1733 OUTPUT:
1734 RETVAL
1735
1736int
1737cctx_idle ()
1738 CODE:
1739 RETVAL = cctx_idle;
1740 OUTPUT:
1741 RETVAL
1742
1743void
1744list ()
1745 PPCODE:
1746{
1747 struct coro *coro;
1748 for (coro = coro_first; coro; coro = coro->next)
1749 if (coro->hv)
1750 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1751}
1752
1753void
1754call (Coro::State coro, SV *coderef)
1755 ALIAS:
1756 eval = 1
1757 CODE:
1758{
1759 if (coro->mainstack)
939 { 1760 {
940 struct coro temp; 1761 struct coro temp;
941 1762
1763 if (!(coro->flags & CF_RUNNING))
1764 {
1765 PUTBACK;
1766 save_perl (aTHX_ &temp);
1767 load_perl (aTHX_ coro);
1768 }
1769
1770 {
1771 dSP;
1772 ENTER;
1773 SAVETMPS;
942 PUTBACK; 1774 PUTBACK;
943 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 1775 PUSHSTACK;
944 LOAD(aTHX_ coro); 1776 PUSHMARK (SP);
1777
1778 if (ix)
1779 eval_sv (coderef, 0);
1780 else
1781 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1782
1783 POPSTACK;
945 SPAGAIN; 1784 SPAGAIN;
1785 FREETMPS;
1786 LEAVE;
1787 PUTBACK;
1788 }
946 1789
947 destroy_stacks (aTHX); 1790 if (!(coro->flags & CF_RUNNING))
948 1791 {
949 LOAD((&temp)); /* this will get rid of defsv etc.. */ 1792 save_perl (aTHX_ coro);
1793 load_perl (aTHX_ &temp);
950 SPAGAIN; 1794 SPAGAIN;
951 1795 }
952 coro->mainstack = 0;
953 } 1796 }
1797}
954 1798
955 deallocate_stack (coro); 1799SV *
956 1800is_ready (Coro::State coro)
957 Safefree (coro); 1801 PROTOTYPE: $
1802 ALIAS:
1803 is_ready = CF_READY
1804 is_running = CF_RUNNING
1805 is_new = CF_NEW
1806 is_destroyed = CF_DESTROYED
1807 CODE:
1808 RETVAL = boolSV (coro->flags & ix);
1809 OUTPUT:
1810 RETVAL
958 1811
959void 1812void
960flush() 1813api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
961 CODE:
962#ifdef MAY_FLUSH
963 flush_padlist_cache ();
964#endif
965 1814
966void 1815SV *
967_exit(code) 1816has_cctx (Coro::State coro)
968 int code
969 PROTOTYPE: $ 1817 PROTOTYPE: $
970 CODE: 1818 CODE:
971#if defined(__GLIBC__) || _POSIX_C_SOURCE 1819 RETVAL = boolSV (!!coro->cctx);
972 _exit (code); 1820 OUTPUT:
973#else 1821 RETVAL
974 signal (SIGTERM, SIG_DFL);
975 raise (SIGTERM);
976 exit (code);
977#endif
978 1822
979MODULE = Coro::State PACKAGE = Coro::Cont 1823int
1824is_traced (Coro::State coro)
1825 PROTOTYPE: $
1826 CODE:
1827 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1828 OUTPUT:
1829 RETVAL
980 1830
981# this is slightly dirty (should expose a c-level api) 1831IV
1832rss (Coro::State coro)
1833 PROTOTYPE: $
1834 ALIAS:
1835 usecount = 1
1836 CODE:
1837 switch (ix)
1838 {
1839 case 0: RETVAL = coro_rss (aTHX_ coro); break;
1840 case 1: RETVAL = coro->usecount; break;
1841 }
1842 OUTPUT:
1843 RETVAL
982 1844
983void 1845void
984yield(...) 1846force_cctx ()
985 PROTOTYPE: @ 1847 CODE:
986 CODE: 1848 struct coro *coro = SvSTATE (coro_current);
987 static SV *returnstk; 1849 coro->cctx->idle_sp = 0;
988 SV *sv;
989 AV *defav = GvAV (PL_defgv);
990 struct coro *prev, *next;
991
992 if (!returnstk)
993 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
994
995 /* set up @_ -- ugly */
996 av_clear (defav);
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 1850
1009MODULE = Coro::State PACKAGE = Coro 1851MODULE = Coro::State PACKAGE = Coro
1010 1852
1011# this is slightly dirty (should expose a c-level api)
1012
1013BOOT: 1853BOOT:
1014{ 1854{
1015 int i; 1855 int i;
1856
1857 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
1858 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1859 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
1860
1861 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
1862 SvREADONLY_on (coro_current);
1863
1016 HV *stash = gv_stashpv ("Coro", TRUE); 1864 coro_stash = gv_stashpv ("Coro", TRUE);
1017 1865
1018 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1866 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1019 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1867 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1020 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1868 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1021 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1869 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1022 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1870 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1023 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1871 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 1872
1028 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1873 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1029 coro_ready[i] = newAV (); 1874 coro_ready[i] = newAV ();
1030 1875
1031 { 1876 {
1032 SV *sv = perl_get_sv("Coro::API", 1); 1877 SV *sv = perl_get_sv ("Coro::API", TRUE);
1878 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1033 1879
1034 coroapi.schedule = api_schedule; 1880 coroapi.schedule = api_schedule;
1881 coroapi.cede = api_cede;
1882 coroapi.cede_notself = api_cede_notself;
1035 coroapi.ready = api_ready; 1883 coroapi.ready = api_ready;
1884 coroapi.is_ready = api_is_ready;
1036 coroapi.nready = &coro_nready; 1885 coroapi.nready = &coro_nready;
1037 coroapi.current = coro_current; 1886 coroapi.current = coro_current;
1038 1887
1039 GCoroAPI = &coroapi; 1888 GCoroAPI = &coroapi;
1040 sv_setiv(sv, (IV)&coroapi); 1889 sv_setiv (sv, (IV)&coroapi);
1041 SvREADONLY_on(sv); 1890 SvREADONLY_on (sv);
1042 } 1891 }
1043} 1892}
1044 1893
1045void 1894void
1046ready(self) 1895_set_current (SV *current)
1047 SV * self
1048 PROTOTYPE: $ 1896 PROTOTYPE: $
1049 CODE: 1897 CODE:
1050 api_ready (self); 1898 SvREFCNT_dec (SvRV (coro_current));
1899 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1900
1901void
1902_set_readyhook (SV *hook)
1903 PROTOTYPE: $
1904 CODE:
1905 LOCK;
1906 if (coro_readyhook)
1907 SvREFCNT_dec (coro_readyhook);
1908 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1909 UNLOCK;
1051 1910
1052int 1911int
1912prio (Coro::State coro, int newprio = 0)
1913 ALIAS:
1914 nice = 1
1915 CODE:
1916{
1917 RETVAL = coro->prio;
1918
1919 if (items > 1)
1920 {
1921 if (ix)
1922 newprio = coro->prio - newprio;
1923
1924 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1925 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1926
1927 coro->prio = newprio;
1928 }
1929}
1930 OUTPUT:
1931 RETVAL
1932
1933SV *
1934ready (SV *self)
1935 PROTOTYPE: $
1936 CODE:
1937 RETVAL = boolSV (api_ready (self));
1938 OUTPUT:
1939 RETVAL
1940
1941int
1053nready(...) 1942nready (...)
1054 PROTOTYPE: 1943 PROTOTYPE:
1055 CODE: 1944 CODE:
1056 RETVAL = coro_nready; 1945 RETVAL = coro_nready;
1057 OUTPUT: 1946 OUTPUT:
1058 RETVAL 1947 RETVAL
1059 1948
1060void 1949void
1061schedule(...) 1950throw (Coro::State self, SV *throw = &PL_sv_undef)
1951 PROTOTYPE: $;$
1952 CODE:
1953 SvREFCNT_dec (self->throw);
1954 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1955
1956void
1957swap_defsv (Coro::State self)
1062 PROTOTYPE: 1958 PROTOTYPE: $
1063 ALIAS: 1959 ALIAS:
1064 cede = 1 1960 swap_defav = 1
1961 CODE:
1962 if (!self->slot)
1963 croak ("cannot swap state with coroutine that has no saved state");
1964 else
1965 {
1966 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
1967 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1968
1969 SV *tmp = *src; *src = *dst; *dst = tmp;
1970 }
1971
1972# for async_pool speedup
1973void
1974_pool_1 (SV *cb)
1065 CODE: 1975 CODE:
1066 api_schedule (ix); 1976{
1977 struct coro *coro = SvSTATE (coro_current);
1978 HV *hv = (HV *)SvRV (coro_current);
1979 AV *defav = GvAV (PL_defgv);
1980 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1981 AV *invoke_av;
1982 int i, len;
1067 1983
1984 if (!invoke)
1985 {
1986 SvREFCNT_dec (PL_diehook); PL_diehook = 0;
1987 croak ("\3async_pool terminate\2\n");
1988 }
1989
1990 SvREFCNT_dec (coro->saved_deffh);
1991 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
1992
1993 hv_store (hv, "desc", sizeof ("desc") - 1,
1994 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1995
1996 invoke_av = (AV *)SvRV (invoke);
1997 len = av_len (invoke_av);
1998
1999 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2000
2001 if (len > 0)
2002 {
2003 av_fill (defav, len - 1);
2004 for (i = 0; i < len; ++i)
2005 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
2006 }
2007
2008 SvREFCNT_dec (invoke);
2009}
2010
2011void
2012_pool_2 (SV *cb)
2013 CODE:
2014{
2015 struct coro *coro = SvSTATE (coro_current);
2016
2017 sv_setsv (cb, &PL_sv_undef);
2018
2019 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2020 coro->saved_deffh = 0;
2021
2022 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
2023 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2024 {
2025 SvREFCNT_dec (PL_diehook); PL_diehook = 0;
2026 croak ("\3async_pool terminate\2\n");
2027 }
2028
2029 av_clear (GvAV (PL_defgv));
2030 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2031 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2032
2033 coro->prio = 0;
2034
2035 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2036 api_trace (coro_current, 0);
2037
2038 av_push (av_async_pool, newSVsv (coro_current));
2039}
2040
2041
2042MODULE = Coro::State PACKAGE = Coro::AIO
2043
2044SV *
2045_get_state ()
2046 CODE:
2047{
2048 struct io_state *data;
2049
2050 RETVAL = newSV (sizeof (struct io_state));
2051 data = (struct io_state *)SvPVX (RETVAL);
2052 SvCUR_set (RETVAL, sizeof (struct io_state));
2053 SvPOK_only (RETVAL);
2054
2055 data->errorno = errno;
2056 data->laststype = PL_laststype;
2057 data->laststatval = PL_laststatval;
2058 data->statcache = PL_statcache;
2059}
2060 OUTPUT:
2061 RETVAL
2062
2063void
2064_set_state (char *data_)
2065 PROTOTYPE: $
2066 CODE:
2067{
2068 struct io_state *data = (void *)data_;
2069
2070 errno = data->errorno;
2071 PL_laststype = data->laststype;
2072 PL_laststatval = data->laststatval;
2073 PL_statcache = data->statcache;
2074}
2075
2076
2077MODULE = Coro::State PACKAGE = Coro::AnyEvent
2078
2079BOOT:
2080 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2081
2082SV *
2083_schedule ()
2084 PROTOTYPE: @
2085 CODE:
2086{
2087 static int incede;
2088
2089 api_cede_notself ();
2090
2091 ++incede;
2092 while (coro_nready >= incede && api_cede ())
2093 ;
2094
2095 sv_setsv (sv_activity, &PL_sv_undef);
2096 if (coro_nready >= incede)
2097 {
2098 PUSHMARK (SP);
2099 PUTBACK;
2100 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2101 SPAGAIN;
2102 }
2103
2104 --incede;
2105}
2106

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