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Comparing Coro/Coro/State.xs (file contents):
Revision 1.37 by root, Tue Oct 9 00:39:11 2001 UTC vs.
Revision 1.237 by root, Fri May 23 00:27:06 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#if 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 *sv_hook;
1389 void (*xs_hook)(void);
1390
1391 if (SvROK (coro_sv))
1392 coro_sv = SvRV (coro_sv);
1393
1394 coro = SvSTATE (coro_sv);
1395
1396 if (coro->flags & CF_READY)
1397 return 0;
1398
1399 coro->flags |= CF_READY;
1400
1401 LOCK;
1402
1403 sv_hook = coro_nready ? 0 : coro_readyhook;
1404 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1405
1406 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1407 ++coro_nready;
1408
1409 UNLOCK;
1410
1411 if (sv_hook)
1412 {
1413 dSP;
1414
1415 ENTER;
1416 SAVETMPS;
1417
1418 PUSHMARK (SP);
1419 PUTBACK;
1420 call_sv (sv_hook, G_DISCARD);
1421 SPAGAIN;
1422
1423 FREETMPS;
1424 LEAVE;
1425 }
1426
1427 if (xs_hook)
1428 xs_hook ();
1429
1430 return 1;
1431}
1432
1433static int
1434api_is_ready (SV *coro_sv)
1435{
1436 dTHX;
1437 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1438}
1439
848static void 1440static void
849api_ready (SV *coro) 1441prepare_schedule (pTHX_ struct transfer_args *ta)
850{ 1442{
851 coro_enq (SvREFCNT_inc (coro)); 1443 SV *prev_sv, *next_sv;
1444
1445 for (;;)
1446 {
1447 LOCK;
1448 next_sv = coro_deq (aTHX);
1449
1450 /* nothing to schedule: call the idle handler */
1451 if (expect_false (!next_sv))
1452 {
1453 dSP;
1454 UNLOCK;
1455
1456 ENTER;
1457 SAVETMPS;
1458
1459 PUSHMARK (SP);
1460 PUTBACK;
1461 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1462 SPAGAIN;
1463
1464 FREETMPS;
1465 LEAVE;
1466 continue;
1467 }
1468
1469 ta->next = SvSTATE (next_sv);
1470
1471 /* cannot transfer to destroyed coros, skip and look for next */
1472 if (expect_false (ta->next->flags & CF_DESTROYED))
1473 {
1474 UNLOCK;
1475 SvREFCNT_dec (next_sv);
1476 /* coro_nready is already taken care of by destroy */
1477 continue;
1478 }
1479
1480 --coro_nready;
1481 UNLOCK;
1482 break;
1483 }
1484
1485 /* free this only after the transfer */
1486 prev_sv = SvRV (coro_current);
1487 ta->prev = SvSTATE (prev_sv);
1488 TRANSFER_CHECK (*ta);
1489 assert (ta->next->flags & CF_READY);
1490 ta->next->flags &= ~CF_READY;
1491 SvRV_set (coro_current, next_sv);
1492
1493 LOCK;
1494 free_coro_mortal (aTHX);
1495 coro_mortal = prev_sv;
1496 UNLOCK;
852} 1497}
853 1498
854static void 1499static void
855api_schedule (int cede) 1500prepare_cede (pTHX_ struct transfer_args *ta)
856{ 1501{
857 SV *prev, *next; 1502 api_ready (coro_current);
1503 prepare_schedule (aTHX_ ta);
1504}
858 1505
1506static int
1507prepare_cede_notself (pTHX_ struct transfer_args *ta)
1508{
1509 if (coro_nready)
1510 {
859 prev = GvSV (coro_current); 1511 SV *prev = SvRV (coro_current);
860 1512 prepare_schedule (aTHX_ ta);
861 if (cede) 1513 api_ready (prev);
862 coro_enq (SvREFCNT_inc (prev)); 1514 return 1;
863 1515 }
864 next = coro_deq (PRIO_MIN); 1516 else
865 1517 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} 1518}
877 1519
1520static void
1521api_schedule (void)
1522{
1523 dTHX;
1524 struct transfer_args ta;
1525
1526 prepare_schedule (aTHX_ &ta);
1527 TRANSFER (ta, 1);
1528}
1529
1530static int
1531api_cede (void)
1532{
1533 dTHX;
1534 struct transfer_args ta;
1535
1536 prepare_cede (aTHX_ &ta);
1537
1538 if (expect_true (ta.prev != ta.next))
1539 {
1540 TRANSFER (ta, 1);
1541 return 1;
1542 }
1543 else
1544 return 0;
1545}
1546
1547static int
1548api_cede_notself (void)
1549{
1550 dTHX;
1551 struct transfer_args ta;
1552
1553 if (prepare_cede_notself (aTHX_ &ta))
1554 {
1555 TRANSFER (ta, 1);
1556 return 1;
1557 }
1558 else
1559 return 0;
1560}
1561
1562static void
1563api_trace (SV *coro_sv, int flags)
1564{
1565 dTHX;
1566 struct coro *coro = SvSTATE (coro_sv);
1567
1568 if (flags & CC_TRACE)
1569 {
1570 if (!coro->cctx)
1571 coro->cctx = cctx_new ();
1572 else if (!(coro->cctx->flags & CC_TRACE))
1573 croak ("cannot enable tracing on coroutine with custom stack");
1574
1575 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1576 }
1577 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1578 {
1579 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1580
1581 if (coro->flags & CF_RUNNING)
1582 PL_runops = RUNOPS_DEFAULT;
1583 else
1584 coro->slot->runops = RUNOPS_DEFAULT;
1585 }
1586}
1587
878MODULE = Coro::State PACKAGE = Coro::State 1588MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
879 1589
880PROTOTYPES: ENABLE 1590PROTOTYPES: DISABLE
881 1591
882BOOT: 1592BOOT:
883{ /* {} necessary for stoopid perl-5.6.x */ 1593{
884 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 1594#ifdef USE_ITHREADS
885 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 1595 MUTEX_INIT (&coro_mutex);
1596#endif
1597 BOOT_PAGESIZE;
1598
1599 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1600 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1601
1602 orig_sigelem_get = PL_vtbl_sigelem.svt_get;
1603 PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1604 orig_sigelem_set = PL_vtbl_sigelem.svt_set;
1605 PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1606
1607 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1608 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1609 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1610
886 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1611 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
887 1612
888 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1613 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
889 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1614 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
890 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1615 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
891 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1616 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
892
893 if (!padlist_cache)
894 padlist_cache = newHV ();
895 1617
896 main_mainstack = PL_mainstack; 1618 main_mainstack = PL_mainstack;
1619 main_top_env = PL_top_env;
897 1620
1621 while (main_top_env->je_prev)
1622 main_top_env = main_top_env->je_prev;
1623
898 coroapi.ver = CORO_API_VERSION; 1624 coroapi.ver = CORO_API_VERSION;
1625 coroapi.rev = CORO_API_REVISION;
899 coroapi.transfer = api_transfer; 1626 coroapi.transfer = api_transfer;
900}
901 1627
902Coro::State 1628 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
903_newprocess(args) 1629}
904 SV * args 1630
905 PROTOTYPE: $ 1631SV *
1632new (char *klass, ...)
906 CODE: 1633 CODE:
907 Coro__State coro; 1634{
1635 struct coro *coro;
1636 MAGIC *mg;
1637 HV *hv;
1638 int i;
908 1639
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); 1640 Newz (0, coro, 1, struct coro);
1641 coro->args = newAV ();
1642 coro->flags = CF_NEW;
913 1643
914 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1644 if (coro_first) coro_first->prev = coro;
915 coro->mainstack = 0; /* actual work is done inside transfer */ 1645 coro->next = coro_first;
916 coro->stack = 0; 1646 coro_first = coro;
917 1647
918 RETVAL = coro; 1648 coro->hv = hv = newHV ();
1649 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1650 mg->mg_flags |= MGf_DUP;
1651 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1652
1653 av_extend (coro->args, items - 1);
1654 for (i = 1; i < items; i++)
1655 av_push (coro->args, newSVsv (ST (i)));
1656}
919 OUTPUT: 1657 OUTPUT:
920 RETVAL 1658 RETVAL
921 1659
1660# these not obviously related functions are all rolled into the same xs
1661# function to increase chances that they all will call transfer with the same
1662# stack offset
922void 1663void
923transfer(prev, next, flags) 1664_set_stacklevel (...)
924 Coro::State_or_hashref prev 1665 ALIAS:
925 Coro::State_or_hashref next 1666 Coro::State::transfer = 1
926 int flags 1667 Coro::schedule = 2
927 PROTOTYPE: @ 1668 Coro::cede = 3
1669 Coro::cede_notself = 4
928 CODE: 1670 CODE:
1671{
1672 struct transfer_args ta;
1673
929 PUTBACK; 1674 PUTBACK;
930 transfer (aTHX_ prev, next, flags); 1675 switch (ix)
1676 {
1677 case 0:
1678 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1679 ta.next = 0;
1680 break;
1681
1682 case 1:
1683 if (items != 2)
1684 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1685
1686 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1687 break;
1688
1689 case 2:
1690 prepare_schedule (aTHX_ &ta);
1691 break;
1692
1693 case 3:
1694 prepare_cede (aTHX_ &ta);
1695 break;
1696
1697 case 4:
1698 if (!prepare_cede_notself (aTHX_ &ta))
1699 XSRETURN_EMPTY;
1700
1701 break;
1702 }
931 SPAGAIN; 1703 SPAGAIN;
932 1704
1705 BARRIER;
1706 PUTBACK;
1707 TRANSFER (ta, 0);
1708 SPAGAIN; /* might be the sp of a different coroutine now */
1709 /* be extra careful not to ever do anything after TRANSFER */
1710}
1711
1712bool
1713_destroy (SV *coro_sv)
1714 CODE:
1715 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1716 OUTPUT:
1717 RETVAL
1718
933void 1719void
934DESTROY(coro) 1720_exit (int code)
935 Coro::State coro 1721 PROTOTYPE: $
936 CODE: 1722 CODE:
1723 _exit (code);
937 1724
938 if (coro->mainstack && coro->mainstack != main_mainstack) 1725int
1726cctx_stacksize (int new_stacksize = 0)
1727 CODE:
1728 RETVAL = coro_stacksize;
1729 if (new_stacksize)
1730 coro_stacksize = new_stacksize;
1731 OUTPUT:
1732 RETVAL
1733
1734int
1735cctx_count ()
1736 CODE:
1737 RETVAL = cctx_count;
1738 OUTPUT:
1739 RETVAL
1740
1741int
1742cctx_idle ()
1743 CODE:
1744 RETVAL = cctx_idle;
1745 OUTPUT:
1746 RETVAL
1747
1748void
1749list ()
1750 PPCODE:
1751{
1752 struct coro *coro;
1753 for (coro = coro_first; coro; coro = coro->next)
1754 if (coro->hv)
1755 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1756}
1757
1758void
1759call (Coro::State coro, SV *coderef)
1760 ALIAS:
1761 eval = 1
1762 CODE:
1763{
1764 if (coro->mainstack)
939 { 1765 {
940 struct coro temp; 1766 struct coro temp;
941 1767
1768 if (!(coro->flags & CF_RUNNING))
1769 {
1770 PUTBACK;
1771 save_perl (aTHX_ &temp);
1772 load_perl (aTHX_ coro);
1773 }
1774
1775 {
1776 dSP;
1777 ENTER;
1778 SAVETMPS;
942 PUTBACK; 1779 PUTBACK;
943 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 1780 PUSHSTACK;
944 LOAD(aTHX_ coro); 1781 PUSHMARK (SP);
1782
1783 if (ix)
1784 eval_sv (coderef, 0);
1785 else
1786 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1787
1788 POPSTACK;
945 SPAGAIN; 1789 SPAGAIN;
1790 FREETMPS;
1791 LEAVE;
1792 PUTBACK;
1793 }
946 1794
947 destroy_stacks (aTHX); 1795 if (!(coro->flags & CF_RUNNING))
948 1796 {
949 LOAD((&temp)); /* this will get rid of defsv etc.. */ 1797 save_perl (aTHX_ coro);
1798 load_perl (aTHX_ &temp);
950 SPAGAIN; 1799 SPAGAIN;
951 1800 }
952 coro->mainstack = 0;
953 } 1801 }
1802}
954 1803
955 deallocate_stack (coro); 1804SV *
956 1805is_ready (Coro::State coro)
957 Safefree (coro); 1806 PROTOTYPE: $
1807 ALIAS:
1808 is_ready = CF_READY
1809 is_running = CF_RUNNING
1810 is_new = CF_NEW
1811 is_destroyed = CF_DESTROYED
1812 CODE:
1813 RETVAL = boolSV (coro->flags & ix);
1814 OUTPUT:
1815 RETVAL
958 1816
959void 1817void
960flush() 1818api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
961 CODE:
962#ifdef MAY_FLUSH
963 flush_padlist_cache ();
964#endif
965 1819
966void 1820SV *
967_exit(code) 1821has_cctx (Coro::State coro)
968 int code
969 PROTOTYPE: $ 1822 PROTOTYPE: $
970 CODE: 1823 CODE:
971#if defined(__GLIBC__) || _POSIX_C_SOURCE 1824 RETVAL = boolSV (!!coro->cctx);
972 _exit (code); 1825 OUTPUT:
973#else 1826 RETVAL
974 signal (SIGTERM, SIG_DFL);
975 raise (SIGTERM);
976 exit (code);
977#endif
978 1827
979MODULE = Coro::State PACKAGE = Coro::Cont 1828int
1829is_traced (Coro::State coro)
1830 PROTOTYPE: $
1831 CODE:
1832 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1833 OUTPUT:
1834 RETVAL
980 1835
981# this is slightly dirty (should expose a c-level api) 1836IV
1837rss (Coro::State coro)
1838 PROTOTYPE: $
1839 ALIAS:
1840 usecount = 1
1841 CODE:
1842 switch (ix)
1843 {
1844 case 0: RETVAL = coro_rss (aTHX_ coro); break;
1845 case 1: RETVAL = coro->usecount; break;
1846 }
1847 OUTPUT:
1848 RETVAL
982 1849
983void 1850void
984yield(...) 1851force_cctx ()
985 PROTOTYPE: @ 1852 CODE:
986 CODE: 1853 struct coro *coro = SvSTATE (coro_current);
987 static SV *returnstk; 1854 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 1855
1009MODULE = Coro::State PACKAGE = Coro 1856MODULE = Coro::State PACKAGE = Coro
1010 1857
1011# this is slightly dirty (should expose a c-level api)
1012
1013BOOT: 1858BOOT:
1014{ 1859{
1015 int i; 1860 int i;
1861
1862 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
1863 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1864 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
1865
1866 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
1867 SvREADONLY_on (coro_current);
1868
1016 HV *stash = gv_stashpv ("Coro", TRUE); 1869 coro_stash = gv_stashpv ("Coro", TRUE);
1017 1870
1018 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1871 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1019 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1872 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1020 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1873 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1021 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1874 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1022 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1875 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1023 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1876 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 1877
1028 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1878 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1029 coro_ready[i] = newAV (); 1879 coro_ready[i] = newAV ();
1030 1880
1031 { 1881 {
1032 SV *sv = perl_get_sv("Coro::API", 1); 1882 SV *sv = perl_get_sv ("Coro::API", TRUE);
1883 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1033 1884
1034 coroapi.schedule = api_schedule; 1885 coroapi.schedule = api_schedule;
1886 coroapi.cede = api_cede;
1887 coroapi.cede_notself = api_cede_notself;
1035 coroapi.ready = api_ready; 1888 coroapi.ready = api_ready;
1889 coroapi.is_ready = api_is_ready;
1036 coroapi.nready = &coro_nready; 1890 coroapi.nready = &coro_nready;
1037 coroapi.current = coro_current; 1891 coroapi.current = coro_current;
1038 1892
1039 GCoroAPI = &coroapi; 1893 GCoroAPI = &coroapi;
1040 sv_setiv(sv, (IV)&coroapi); 1894 sv_setiv (sv, (IV)&coroapi);
1041 SvREADONLY_on(sv); 1895 SvREADONLY_on (sv);
1042 } 1896 }
1043} 1897}
1044 1898
1045void 1899void
1046ready(self) 1900_set_current (SV *current)
1047 SV * self
1048 PROTOTYPE: $ 1901 PROTOTYPE: $
1049 CODE: 1902 CODE:
1050 api_ready (self); 1903 SvREFCNT_dec (SvRV (coro_current));
1904 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1905
1906void
1907_set_readyhook (SV *hook)
1908 PROTOTYPE: $
1909 CODE:
1910 LOCK;
1911 SvREFCNT_dec (coro_readyhook);
1912 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1913 UNLOCK;
1051 1914
1052int 1915int
1916prio (Coro::State coro, int newprio = 0)
1917 ALIAS:
1918 nice = 1
1919 CODE:
1920{
1921 RETVAL = coro->prio;
1922
1923 if (items > 1)
1924 {
1925 if (ix)
1926 newprio = coro->prio - newprio;
1927
1928 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1929 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1930
1931 coro->prio = newprio;
1932 }
1933}
1934 OUTPUT:
1935 RETVAL
1936
1937SV *
1938ready (SV *self)
1939 PROTOTYPE: $
1940 CODE:
1941 RETVAL = boolSV (api_ready (self));
1942 OUTPUT:
1943 RETVAL
1944
1945int
1053nready(...) 1946nready (...)
1054 PROTOTYPE: 1947 PROTOTYPE:
1055 CODE: 1948 CODE:
1056 RETVAL = coro_nready; 1949 RETVAL = coro_nready;
1057 OUTPUT: 1950 OUTPUT:
1058 RETVAL 1951 RETVAL
1059 1952
1060void 1953void
1061schedule(...) 1954throw (Coro::State self, SV *throw = &PL_sv_undef)
1955 PROTOTYPE: $;$
1956 CODE:
1957 SvREFCNT_dec (self->throw);
1958 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1959
1960void
1961swap_defsv (Coro::State self)
1062 PROTOTYPE: 1962 PROTOTYPE: $
1063 ALIAS: 1963 ALIAS:
1064 cede = 1 1964 swap_defav = 1
1965 CODE:
1966 if (!self->slot)
1967 croak ("cannot swap state with coroutine that has no saved state");
1968 else
1969 {
1970 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
1971 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1972
1973 SV *tmp = *src; *src = *dst; *dst = tmp;
1974 }
1975
1976# for async_pool speedup
1977void
1978_pool_1 (SV *cb)
1065 CODE: 1979 CODE:
1066 api_schedule (ix); 1980{
1981 struct coro *coro = SvSTATE (coro_current);
1982 HV *hv = (HV *)SvRV (coro_current);
1983 AV *defav = GvAV (PL_defgv);
1984 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1985 AV *invoke_av;
1986 int i, len;
1067 1987
1988 if (!invoke)
1989 {
1990 SvREFCNT_dec (PL_diehook); PL_diehook = 0;
1991 croak ("\3async_pool terminate\2\n");
1992 }
1993
1994 SvREFCNT_dec (coro->saved_deffh);
1995 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
1996
1997 hv_store (hv, "desc", sizeof ("desc") - 1,
1998 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1999
2000 invoke_av = (AV *)SvRV (invoke);
2001 len = av_len (invoke_av);
2002
2003 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2004
2005 if (len > 0)
2006 {
2007 av_fill (defav, len - 1);
2008 for (i = 0; i < len; ++i)
2009 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
2010 }
2011
2012 SvREFCNT_dec (invoke);
2013}
2014
2015void
2016_pool_2 (SV *cb)
2017 CODE:
2018{
2019 struct coro *coro = SvSTATE (coro_current);
2020
2021 sv_setsv (cb, &PL_sv_undef);
2022
2023 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2024 coro->saved_deffh = 0;
2025
2026 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
2027 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2028 {
2029 SvREFCNT_dec (PL_diehook); PL_diehook = 0;
2030 croak ("\3async_pool terminate\2\n");
2031 }
2032
2033 av_clear (GvAV (PL_defgv));
2034 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2035 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2036
2037 coro->prio = 0;
2038
2039 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2040 api_trace (coro_current, 0);
2041
2042 av_push (av_async_pool, newSVsv (coro_current));
2043}
2044
2045
2046MODULE = Coro::State PACKAGE = Coro::AIO
2047
2048SV *
2049_get_state ()
2050 CODE:
2051{
2052 struct io_state *data;
2053
2054 RETVAL = newSV (sizeof (struct io_state));
2055 data = (struct io_state *)SvPVX (RETVAL);
2056 SvCUR_set (RETVAL, sizeof (struct io_state));
2057 SvPOK_only (RETVAL);
2058
2059 data->errorno = errno;
2060 data->laststype = PL_laststype;
2061 data->laststatval = PL_laststatval;
2062 data->statcache = PL_statcache;
2063}
2064 OUTPUT:
2065 RETVAL
2066
2067void
2068_set_state (char *data_)
2069 PROTOTYPE: $
2070 CODE:
2071{
2072 struct io_state *data = (void *)data_;
2073
2074 errno = data->errorno;
2075 PL_laststype = data->laststype;
2076 PL_laststatval = data->laststatval;
2077 PL_statcache = data->statcache;
2078}
2079
2080
2081MODULE = Coro::State PACKAGE = Coro::AnyEvent
2082
2083BOOT:
2084 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2085
2086SV *
2087_schedule (...)
2088 PROTOTYPE: @
2089 CODE:
2090{
2091 static int incede;
2092
2093 api_cede_notself ();
2094
2095 ++incede;
2096 while (coro_nready >= incede && api_cede ())
2097 ;
2098
2099 sv_setsv (sv_activity, &PL_sv_undef);
2100 if (coro_nready >= incede)
2101 {
2102 PUSHMARK (SP);
2103 PUTBACK;
2104 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2105 SPAGAIN;
2106 }
2107
2108 --incede;
2109}
2110

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