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Comparing Coro/Coro/State.xs (file contents):
Revision 1.40 by root, Tue Nov 27 01:41:41 2001 UTC vs.
Revision 1.240 by root, Sun Jun 29 00:28:17 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 PMOP *curpm;
93 JMPENV *top_env;
94 239
95 /* data associated with this coroutine (initial args) */ 240 AV *args; /* data associated with this coroutine (initial args) */
96 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;
97}; 257};
98 258
99typedef struct coro *Coro__State; 259typedef struct coro *Coro__State;
100typedef struct coro *Coro__State_or_hashref; 260typedef struct coro *Coro__State_or_hashref;
101
102static AV *main_mainstack; /* used to differentiate between $main and others */
103static HV *coro_state_stash;
104static SV *ucoro_state_sv;
105static U32 ucoro_state_hash;
106static HV *padlist_cache;
107static SV *coro_mortal; /* will be freed after next transfer */
108
109/* mostly copied from op.c:cv_clone2 */
110STATIC AV *
111clone_padlist (AV *protopadlist)
112{
113 AV *av;
114 I32 ix;
115 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
116 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
117 SV **pname = AvARRAY (protopad_name);
118 SV **ppad = AvARRAY (protopad);
119 I32 fname = AvFILLp (protopad_name);
120 I32 fpad = AvFILLp (protopad);
121 AV *newpadlist, *newpad_name, *newpad;
122 SV **npad;
123
124 newpad_name = newAV ();
125 for (ix = fname; ix >= 0; ix--)
126 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
127
128 newpad = newAV ();
129 av_fill (newpad, AvFILLp (protopad));
130 npad = AvARRAY (newpad);
131
132 newpadlist = newAV ();
133 AvREAL_off (newpadlist);
134 av_store (newpadlist, 0, (SV *) newpad_name);
135 av_store (newpadlist, 1, (SV *) newpad);
136
137 av = newAV (); /* will be @_ */
138 av_extend (av, 0);
139 av_store (newpad, 0, (SV *) av);
140 AvFLAGS (av) = AVf_REIFY;
141
142 for (ix = fpad; ix > 0; ix--)
143 {
144 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
145 if (namesv && namesv != &PL_sv_undef)
146 {
147 char *name = SvPVX (namesv); /* XXX */
148 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
149 { /* lexical from outside? */
150 npad[ix] = SvREFCNT_inc (ppad[ix]);
151 }
152 else
153 { /* our own lexical */
154 SV *sv;
155 if (*name == '&')
156 sv = SvREFCNT_inc (ppad[ix]);
157 else if (*name == '@')
158 sv = (SV *) newAV ();
159 else if (*name == '%')
160 sv = (SV *) newHV ();
161 else
162 sv = NEWSV (0, 0);
163 if (!SvPADBUSY (sv))
164 SvPADMY_on (sv);
165 npad[ix] = sv;
166 }
167 }
168 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
169 {
170 npad[ix] = SvREFCNT_inc (ppad[ix]);
171 }
172 else
173 {
174 SV *sv = NEWSV (0, 0);
175 SvPADTMP_on (sv);
176 npad[ix] = sv;
177 }
178 }
179
180#if 0 /* return -ENOTUNDERSTOOD */
181 /* Now that vars are all in place, clone nested closures. */
182
183 for (ix = fpad; ix > 0; ix--) {
184 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
185 if (namesv
186 && namesv != &PL_sv_undef
187 && !(SvFLAGS(namesv) & SVf_FAKE)
188 && *SvPVX(namesv) == '&'
189 && CvCLONE(ppad[ix]))
190 {
191 CV *kid = cv_clone((CV*)ppad[ix]);
192 SvREFCNT_dec(ppad[ix]);
193 CvCLONE_on(kid);
194 SvPADMY_on(kid);
195 npad[ix] = (SV*)kid;
196 }
197 }
198#endif
199
200 return newpadlist;
201}
202
203#ifdef MAY_FLUSH
204STATIC void
205free_padlist (AV *padlist)
206{
207 /* may be during global destruction */
208 if (SvREFCNT(padlist))
209 {
210 I32 i = AvFILLp(padlist);
211 while (i >= 0)
212 {
213 SV **svp = av_fetch(padlist, i--, FALSE);
214 SV *sv = svp ? *svp : Nullsv;
215 if (sv)
216 SvREFCNT_dec(sv);
217 }
218
219 SvREFCNT_dec((SV*)padlist);
220 }
221}
222#endif
223
224/* the next two functions merely cache the padlists */
225STATIC void
226get_padlist (CV *cv)
227{
228 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
229
230 if (he && AvFILLp ((AV *)*he) >= 0)
231 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
232 else
233 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
234}
235
236STATIC void
237put_padlist (CV *cv)
238{
239 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
240
241 if (SvTYPE (*he) != SVt_PVAV)
242 {
243 SvREFCNT_dec (*he);
244 *he = (SV *)newAV ();
245 }
246
247 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
248}
249
250#ifdef MAY_FLUSH
251STATIC void
252flush_padlist_cache ()
253{
254 HV *hv = padlist_cache;
255 padlist_cache = newHV ();
256
257 if (hv_iterinit (hv))
258 {
259 HE *he;
260 AV *padlist;
261
262 while (!!(he = hv_iternext (hv)))
263 {
264 AV *av = (AV *)HeVAL(he);
265
266 /* casting is fun. */
267 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
268 free_padlist (padlist);
269 }
270 }
271
272 SvREFCNT_dec (hv);
273}
274#endif
275
276#define SB do {
277#define SE } while (0)
278
279#define LOAD(state) load_state(aTHX_ (state));
280#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
281
282#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
283
284static void
285load_state(pTHX_ Coro__State c)
286{
287 PL_dowarn = c->dowarn;
288 PL_in_eval = c->in_eval;
289
290 PL_curstackinfo = c->curstackinfo;
291 PL_curstack = c->curstack;
292 PL_mainstack = c->mainstack;
293 PL_stack_sp = c->stack_sp;
294 PL_op = c->op;
295 PL_curpad = c->curpad;
296 PL_stack_base = c->stack_base;
297 PL_stack_max = c->stack_max;
298 PL_tmps_stack = c->tmps_stack;
299 PL_tmps_floor = c->tmps_floor;
300 PL_tmps_ix = c->tmps_ix;
301 PL_tmps_max = c->tmps_max;
302 PL_markstack = c->markstack;
303 PL_markstack_ptr = c->markstack_ptr;
304 PL_markstack_max = c->markstack_max;
305 PL_scopestack = c->scopestack;
306 PL_scopestack_ix = c->scopestack_ix;
307 PL_scopestack_max = c->scopestack_max;
308 PL_savestack = c->savestack;
309 PL_savestack_ix = c->savestack_ix;
310 PL_savestack_max = c->savestack_max;
311 PL_retstack = c->retstack;
312 PL_retstack_ix = c->retstack_ix;
313 PL_retstack_max = c->retstack_max;
314 PL_curcop = c->curcop;
315 PL_top_env = c->top_env;
316
317 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
318 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
319 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
320
321 {
322 dSP;
323 CV *cv;
324
325 /* now do the ugly restore mess */
326 while ((cv = (CV *)POPs))
327 {
328 AV *padlist = (AV *)POPs;
329
330 if (padlist)
331 {
332 put_padlist (cv); /* mark this padlist as available */
333 CvPADLIST(cv) = padlist;
334#ifdef USE_THREADS
335 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
336#endif
337 }
338
339 ++CvDEPTH(cv);
340 }
341
342 PUTBACK;
343 }
344}
345
346static void
347save_state(pTHX_ Coro__State c, int flags)
348{
349 {
350 dSP;
351 I32 cxix = cxstack_ix;
352 PERL_CONTEXT *ccstk = cxstack;
353 PERL_SI *top_si = PL_curstackinfo;
354
355 /*
356 * the worst thing you can imagine happens first - we have to save
357 * (and reinitialize) all cv's in the whole callchain :(
358 */
359
360 PUSHs (Nullsv);
361 /* this loop was inspired by pp_caller */
362 for (;;)
363 {
364 while (cxix >= 0)
365 {
366 PERL_CONTEXT *cx = &ccstk[cxix--];
367
368 if (CxTYPE(cx) == CXt_SUB)
369 {
370 CV *cv = cx->blk_sub.cv;
371 if (CvDEPTH(cv))
372 {
373#ifdef USE_THREADS
374 /*XPUSHs ((SV *)CvOWNER(cv));*/
375 /*CvOWNER(cv) = 0;*/
376 /*error must unlock this cv etc.. etc...*/
377#endif
378 EXTEND (SP, CvDEPTH(cv)*2);
379
380 while (--CvDEPTH(cv))
381 {
382 /* this tells the restore code to increment CvDEPTH */
383 PUSHs (Nullsv);
384 PUSHs ((SV *)cv);
385 }
386
387 PUSHs ((SV *)CvPADLIST(cv));
388 PUSHs ((SV *)cv);
389
390 get_padlist (cv); /* this is a monster */
391 }
392 }
393 else if (CxTYPE(cx) == CXt_FORMAT)
394 {
395 /* I never used formats, so how should I know how these are implemented? */
396 /* my bold guess is as a simple, plain sub... */
397 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
398 }
399 }
400
401 if (top_si->si_type == PERLSI_MAIN)
402 break;
403
404 top_si = top_si->si_prev;
405 ccstk = top_si->si_cxstack;
406 cxix = top_si->si_cxix;
407 }
408
409 PUTBACK;
410 }
411
412 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
413 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
414 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
415
416 c->dowarn = PL_dowarn;
417 c->in_eval = PL_in_eval;
418
419 c->curstackinfo = PL_curstackinfo;
420 c->curstack = PL_curstack;
421 c->mainstack = PL_mainstack;
422 c->stack_sp = PL_stack_sp;
423 c->op = PL_op;
424 c->curpad = PL_curpad;
425 c->stack_base = PL_stack_base;
426 c->stack_max = PL_stack_max;
427 c->tmps_stack = PL_tmps_stack;
428 c->tmps_floor = PL_tmps_floor;
429 c->tmps_ix = PL_tmps_ix;
430 c->tmps_max = PL_tmps_max;
431 c->markstack = PL_markstack;
432 c->markstack_ptr = PL_markstack_ptr;
433 c->markstack_max = PL_markstack_max;
434 c->scopestack = PL_scopestack;
435 c->scopestack_ix = PL_scopestack_ix;
436 c->scopestack_max = PL_scopestack_max;
437 c->savestack = PL_savestack;
438 c->savestack_ix = PL_savestack_ix;
439 c->savestack_max = PL_savestack_max;
440 c->retstack = PL_retstack;
441 c->retstack_ix = PL_retstack_ix;
442 c->retstack_max = PL_retstack_max;
443 c->curcop = PL_curcop;
444 c->top_env = PL_top_env;
445}
446
447/*
448 * allocate various perl stacks. This is an exact copy
449 * of perl.c:init_stacks, except that it uses less memory
450 * on the assumption that coroutines do not usually need
451 * a lot of stackspace.
452 */
453STATIC void
454coro_init_stacks (pTHX)
455{
456 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
457 PL_curstackinfo->si_type = PERLSI_MAIN;
458 PL_curstack = PL_curstackinfo->si_stack;
459 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
460
461 PL_stack_base = AvARRAY(PL_curstack);
462 PL_stack_sp = PL_stack_base;
463 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
464
465 New(50,PL_tmps_stack,96,SV*);
466 PL_tmps_floor = -1;
467 PL_tmps_ix = -1;
468 PL_tmps_max = 96;
469
470 New(54,PL_markstack,16,I32);
471 PL_markstack_ptr = PL_markstack;
472 PL_markstack_max = PL_markstack + 16;
473
474 SET_MARK_OFFSET;
475
476 New(54,PL_scopestack,16,I32);
477 PL_scopestack_ix = 0;
478 PL_scopestack_max = 16;
479
480 New(54,PL_savestack,96,ANY);
481 PL_savestack_ix = 0;
482 PL_savestack_max = 96;
483
484 New(54,PL_retstack,8,OP*);
485 PL_retstack_ix = 0;
486 PL_retstack_max = 8;
487}
488
489/*
490 * destroy the stacks, the callchain etc...
491 * still there is a memleak of 128 bytes...
492 */
493STATIC void
494destroy_stacks(pTHX)
495{
496 if (!IN_DESTRUCT)
497 {
498 /* is this ugly, I ask? */
499 while (PL_scopestack_ix)
500 LEAVE;
501
502 /* sure it is, but more important: is it correct?? :/ */
503 while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
504 FREETMPS;
505 }
506
507 while (PL_curstackinfo->si_next)
508 PL_curstackinfo = PL_curstackinfo->si_next;
509
510 while (PL_curstackinfo)
511 {
512 PERL_SI *p = PL_curstackinfo->si_prev;
513
514 {
515 dSP;
516 SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
517 PUTBACK; /* possibly superfluous */
518 }
519
520 if (!IN_DESTRUCT)
521 {
522 dounwind(-1);
523 SvREFCNT_dec(PL_curstackinfo->si_stack);
524 }
525
526 Safefree(PL_curstackinfo->si_cxstack);
527 Safefree(PL_curstackinfo);
528 PL_curstackinfo = p;
529 }
530
531 Safefree(PL_tmps_stack);
532 Safefree(PL_markstack);
533 Safefree(PL_scopestack);
534 Safefree(PL_savestack);
535 Safefree(PL_retstack);
536}
537
538static void
539allocate_stack (Coro__State ctx, int alloc)
540{
541 coro_stack *stack;
542
543 New (0, stack, 1, coro_stack);
544
545 stack->refcnt = 1;
546 stack->usecnt = 1;
547 stack->gencnt = ctx->gencnt = 0;
548 if (alloc)
549 {
550#if HAVE_MMAP
551 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
552 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
553 if (stack->sptr == (void *)-1)
554#endif
555 {
556 /*FIXME*//*D*//* reasonable stack size! */
557 stack->ssize = -4096 * sizeof (long);
558 New (0, stack->sptr, 4096, long);
559 }
560 }
561 else
562 stack->sptr = 0;
563
564 ctx->stack = stack;
565}
566
567static void
568deallocate_stack (Coro__State ctx)
569{
570 coro_stack *stack = ctx->stack;
571
572 ctx->stack = 0;
573
574 if (stack)
575 {
576 if (!--stack->refcnt)
577 {
578#ifdef HAVE_MMAP
579 if (stack->ssize > 0 && stack->sptr)
580 munmap (stack->sptr, stack->ssize);
581 else
582#else
583 Safefree (stack->sptr);
584#endif
585 Safefree (stack);
586 }
587 else if (ctx->gencnt == stack->gencnt)
588 --stack->usecnt;
589 }
590}
591
592static void
593setup_coro (void *arg)
594{
595 /*
596 * emulate part of the perl startup here.
597 */
598 dSP;
599 Coro__State ctx = (Coro__State)arg;
600 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
601
602 coro_init_stacks (aTHX);
603 PL_curpm = 0; /* segfault on first access */
604 /*PL_curcop = 0;*/
605 /*PL_in_eval = PL_in_eval;*/ /* inherit */
606 SvREFCNT_dec (GvAV (PL_defgv));
607 GvAV (PL_defgv) = ctx->args;
608
609 SPAGAIN;
610
611 if (ctx->stack)
612 {
613 ctx->cursp = 0;
614
615 PUSHMARK(SP);
616 PUTBACK;
617 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
618
619 if (SvTRUE (ERRSV))
620 croak (NULL);
621 else
622 croak ("FATAL: CCTXT coroutine returned!");
623 }
624 else
625 {
626 UNOP myop;
627
628 PL_op = (OP *)&myop;
629
630 Zero(&myop, 1, UNOP);
631 myop.op_next = Nullop;
632 myop.op_flags = OPf_WANT_VOID;
633
634 PUSHMARK(SP);
635 XPUSHs (sub_init);
636 /*
637 * the next line is slightly wrong, as PL_op->op_next
638 * is actually being executed so we skip the first op.
639 * that doesn't matter, though, since it is only
640 * pp_nextstate and we never return...
641 * ah yes, and I don't care anyways ;)
642 */
643 PUTBACK;
644 PL_op = pp_entersub();
645 SPAGAIN;
646
647 ENTER; /* necessary e.g. for dounwind */
648 }
649}
650
651static void
652continue_coro (void *arg)
653{
654 /*
655 * this is a _very_ stripped down perl interpreter ;)
656 */
657 Coro__State ctx = (Coro__State)arg;
658 JMPENV coro_start_env;
659
660 /* same as JMPENV_BOOTSTRAP */
661 Zero(&coro_start_env, 1, JMPENV);
662 coro_start_env.je_ret = -1;
663 coro_start_env.je_mustcatch = TRUE;
664 PL_top_env = &coro_start_env;
665
666 ctx->cursp = 0;
667 PL_op = PL_op->op_next;
668 CALLRUNOPS(aTHX);
669
670 abort ();
671}
672
673STATIC void
674transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
675{
676 dSTACKLEVEL;
677 static struct coro *xnext;
678
679 if (prev != next)
680 {
681 xnext = next;
682
683 if (next->mainstack)
684 {
685 SAVE (prev, flags);
686 LOAD (next);
687
688 /* mark this state as in-use */
689 next->mainstack = 0;
690 next->tmps_ix = -2;
691
692 /* stacklevel changed? if yes, grab the stack for us! */
693 if (flags & TRANSFER_SAVE_CCTXT)
694 {
695 if (!prev->stack)
696 allocate_stack (prev, 0);
697 else if (prev->cursp != stacklevel
698 && prev->stack->usecnt > 1)
699 {
700 prev->gencnt = ++prev->stack->gencnt;
701 prev->stack->usecnt = 1;
702 }
703
704 /* has our stack been invalidated? */
705 if (next->stack && next->stack->gencnt != next->gencnt)
706 {
707 deallocate_stack (next);
708 allocate_stack (next, 1);
709 coro_create (&(next->stack->cctx),
710 continue_coro, (void *)next,
711 next->stack->sptr, labs (next->stack->ssize));
712 }
713
714 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
715 /* don't add any code here */
716 }
717
718 }
719 else if (next->tmps_ix == -2)
720 croak ("tried to transfer to running coroutine");
721 else
722 {
723 SAVE (prev, -1); /* first get rid of the old state */
724
725 if (flags & TRANSFER_SAVE_CCTXT)
726 {
727 if (!prev->stack)
728 allocate_stack (prev, 0);
729
730 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
731 {
732 setup_coro (next);
733
734 prev->stack->refcnt++;
735 prev->stack->usecnt++;
736 next->stack = prev->stack;
737 next->gencnt = prev->gencnt;
738 }
739 else
740 {
741 allocate_stack (next, 1);
742 coro_create (&(next->stack->cctx),
743 setup_coro, (void *)next,
744 next->stack->sptr, labs (next->stack->ssize));
745 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
746 /* don't add any code here */
747 }
748 }
749 else
750 setup_coro (next);
751 }
752
753 /*
754 * xnext is now either prev or next, depending on wether
755 * we switched the c stack or not. that's why i use a global
756 * variable, that should become thread-specific at one point.
757 */
758 xnext->cursp = stacklevel;
759 }
760
761 if (coro_mortal)
762 {
763 SvREFCNT_dec (coro_mortal);
764 coro_mortal = 0;
765 }
766}
767
768#define SV_CORO(sv,func) \
769 do { \
770 if (SvROK (sv)) \
771 sv = SvRV (sv); \
772 \
773 if (SvTYPE(sv) == SVt_PVHV) \
774 { \
775 HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
776 \
777 if (!he) \
778 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
779 \
780 (sv) = SvRV (HeVAL(he)); \
781 } \
782 \
783 /* must also be changed inside Coro::Cont::yield */ \
784 if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
785 croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
786 \
787 } while(0)
788
789#define SvSTATE(sv) (struct coro *)SvIV (sv)
790
791static void
792api_transfer(pTHX_ SV *prev, SV *next, int flags)
793{
794 SV_CORO (prev, "Coro::transfer");
795 SV_CORO (next, "Coro::transfer");
796
797 transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);
798}
799 261
800/** Coro ********************************************************************/ 262/** Coro ********************************************************************/
801 263
802#define PRIO_MAX 3 264#define PRIO_MAX 3
803#define PRIO_HIGH 1 265#define PRIO_HIGH 1
… …
805#define PRIO_LOW -1 267#define PRIO_LOW -1
806#define PRIO_IDLE -3 268#define PRIO_IDLE -3
807#define PRIO_MIN -4 269#define PRIO_MIN -4
808 270
809/* for Coro.pm */ 271/* for Coro.pm */
810static GV *coro_current, *coro_idle; 272static SV *coro_current;
273static SV *coro_readyhook;
811static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 274static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
812static 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}
813 331
814static void 332static void
815coro_enq (SV *sv) 333free_padlist (pTHX_ AV *padlist)
816{ 334{
817 if (SvTYPE (sv) == SVt_PVHV) 335 /* may be during global destruction */
818 { 336 if (SvREFCNT (padlist))
819 SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
820 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
821
822 prio = prio > PRIO_MAX ? PRIO_MAX
823 : prio < PRIO_MIN ? PRIO_MIN
824 : prio;
825
826 av_push (coro_ready [prio - PRIO_MIN], sv);
827 coro_nready++;
828
829 return;
830 } 337 {
831 338 I32 i = AvFILLp (padlist);
832 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 339 while (i >= 0)
833}
834
835static SV *
836coro_deq (int min_prio)
837{
838 int prio = PRIO_MAX - PRIO_MIN;
839
840 min_prio -= PRIO_MIN;
841 if (min_prio < 0)
842 min_prio = 0;
843
844 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
845 if (av_len (coro_ready[prio]) >= 0)
846 { 340 {
847 coro_nready--; 341 SV **svp = av_fetch (padlist, i--, FALSE);
848 return av_shift (coro_ready[prio]); 342 if (svp)
343 {
344 SV *sv;
345 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
346 SvREFCNT_dec (sv);
347
348 SvREFCNT_dec (*svp);
349 }
849 } 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);
850 365
851 return 0; 366 return 0;
852} 367}
853 368
854static void 369#define CORO_MAGIC_type_cv PERL_MAGIC_ext
855api_ready (SV *coro) 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)
856{ 389{
390 HV *stash;
391 MAGIC *mg;
392
857 if (SvROK (coro)) 393 if (SvROK (coro))
858 coro = SvRV (coro); 394 coro = SvRV (coro);
859 395
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
433 }
434}
435
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);
688static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
689
690/* apparently < 5.8.8 */
691#undef MgPV_nolen_const
692#ifndef MgPV_nolen_const
693#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
694 SvPV_nolen_const((SV*)((mg)->mg_ptr)) : \
695 (const char*)(mg)->mg_ptr)
696#endif
697
698/*
699 * This overrides the default magic get method of %SIG elements.
700 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
701 * and instead of tryign to save and restore the hash elements, we just provide
702 * readback here.
703 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
704 * not expecting this to actually change the hook. This is a potential problem
705 * when a schedule happens then, but we ignore this.
706 */
707static int
708coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
709{
710 const char *s = MgPV_nolen_const (mg);
711
712 if (*s == '_')
713 {
714 SV **svp = 0;
715
716 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
717 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
718
719 if (svp)
720 {
721 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
722 return 0;
723 }
724 }
725
726 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
727}
728
729static int
730coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
731{
732 const char *s = MgPV_nolen_const (mg);
733
734 if (*s == '_')
735 {
736 SV **svp = 0;
737
738 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
739 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
740
741 if (svp)
742 {
743 SV *old = *svp;
744 *svp = 0;
745 SvREFCNT_dec (old);
746 return 0;
747 }
748 }
749
750 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
751}
752
753static int
754coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
755{
756 const char *s = MgPV_nolen_const (mg);
757
758 if (*s == '_')
759 {
760 SV **svp = 0;
761
762 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
763 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
764
765 if (svp)
766 {
767 SV *old = *svp;
768 *svp = newSVsv (sv);
769 SvREFCNT_dec (old);
770 return 0;
771 }
772 }
773
774 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
775}
776
777static void
778coro_setup (pTHX_ struct coro *coro)
779{
780 /*
781 * emulate part of the perl startup here.
782 */
783 coro_init_stacks (aTHX);
784
785 PL_runops = RUNOPS_DEFAULT;
786 PL_curcop = &PL_compiling;
787 PL_in_eval = EVAL_NULL;
788 PL_comppad = 0;
789 PL_curpm = 0;
790 PL_curpad = 0;
791 PL_localizing = 0;
792 PL_dirty = 0;
793 PL_restartop = 0;
794#if PERL_VERSION_ATLEAST (5,10,0)
795 PL_parser = 0;
796#endif
797
798 /* recreate the die/warn hooks */
799 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
800 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
801
802 GvSV (PL_defgv) = newSV (0);
803 GvAV (PL_defgv) = coro->args; coro->args = 0;
804 GvSV (PL_errgv) = newSV (0);
805 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
806 PL_rs = newSVsv (GvSV (irsgv));
807 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
808
809 {
810 dSP;
811 LOGOP myop;
812
813 Zero (&myop, 1, LOGOP);
814 myop.op_next = Nullop;
815 myop.op_flags = OPf_WANT_VOID;
816
817 PUSHMARK (SP);
818 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
819 PUTBACK;
820 PL_op = (OP *)&myop;
821 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
822 SPAGAIN;
823 }
824
825 /* this newly created coroutine might be run on an existing cctx which most
826 * likely was suspended in set_stacklevel, called from entersub.
827 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
828 * so we ENTER here for symmetry
829 */
830 ENTER;
831}
832
833static void
834coro_destroy (pTHX_ struct coro *coro)
835{
836 if (!IN_DESTRUCT)
837 {
838 /* restore all saved variables and stuff */
839 LEAVE_SCOPE (0);
840 assert (PL_tmps_floor == -1);
841
842 /* free all temporaries */
843 FREETMPS;
844 assert (PL_tmps_ix == -1);
845
846 /* unwind all extra stacks */
847 POPSTACK_TO (PL_mainstack);
848
849 /* unwind main stack */
850 dounwind (-1);
851 }
852
853 SvREFCNT_dec (GvSV (PL_defgv));
854 SvREFCNT_dec (GvAV (PL_defgv));
855 SvREFCNT_dec (GvSV (PL_errgv));
856 SvREFCNT_dec (PL_defoutgv);
857 SvREFCNT_dec (PL_rs);
858 SvREFCNT_dec (GvSV (irsgv));
859
860 SvREFCNT_dec (PL_diehook);
861 SvREFCNT_dec (PL_warnhook);
862
863 SvREFCNT_dec (coro->saved_deffh);
864 SvREFCNT_dec (coro->throw);
865
866 coro_destroy_stacks (aTHX);
867}
868
869static void
870free_coro_mortal (pTHX)
871{
872 if (expect_true (coro_mortal))
873 {
874 SvREFCNT_dec (coro_mortal);
875 coro_mortal = 0;
876 }
877}
878
879static int
880runops_trace (pTHX)
881{
882 COP *oldcop = 0;
883 int oldcxix = -2;
884 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
885 coro_cctx *cctx = coro->cctx;
886
887 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
888 {
889 PERL_ASYNC_CHECK ();
890
891 if (cctx->flags & CC_TRACE_ALL)
892 {
893 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
894 {
895 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
896 SV **bot, **top;
897 AV *av = newAV (); /* return values */
898 SV **cb;
899 dSP;
900
901 GV *gv = CvGV (cx->blk_sub.cv);
902 SV *fullname = sv_2mortal (newSV (0));
903 if (isGV (gv))
904 gv_efullname3 (fullname, gv, 0);
905
906 bot = PL_stack_base + cx->blk_oldsp + 1;
907 top = cx->blk_gimme == G_ARRAY ? SP + 1
908 : cx->blk_gimme == G_SCALAR ? bot + 1
909 : bot;
910
911 av_extend (av, top - bot);
912 while (bot < top)
913 av_push (av, SvREFCNT_inc (*bot++));
914
915 PL_runops = RUNOPS_DEFAULT;
916 ENTER;
917 SAVETMPS;
918 EXTEND (SP, 3);
919 PUSHMARK (SP);
920 PUSHs (&PL_sv_no);
921 PUSHs (fullname);
922 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
923 PUTBACK;
924 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
925 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
926 SPAGAIN;
927 FREETMPS;
928 LEAVE;
929 PL_runops = runops_trace;
930 }
931
932 if (oldcop != PL_curcop)
933 {
934 oldcop = PL_curcop;
935
936 if (PL_curcop != &PL_compiling)
937 {
938 SV **cb;
939
940 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
941 {
942 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
943
944 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
945 {
946 runops_proc_t old_runops = PL_runops;
947 dSP;
948 GV *gv = CvGV (cx->blk_sub.cv);
949 SV *fullname = sv_2mortal (newSV (0));
950
951 if (isGV (gv))
952 gv_efullname3 (fullname, gv, 0);
953
954 PL_runops = RUNOPS_DEFAULT;
955 ENTER;
956 SAVETMPS;
957 EXTEND (SP, 3);
958 PUSHMARK (SP);
959 PUSHs (&PL_sv_yes);
960 PUSHs (fullname);
961 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
962 PUTBACK;
963 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
964 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
965 SPAGAIN;
966 FREETMPS;
967 LEAVE;
968 PL_runops = runops_trace;
969 }
970
971 oldcxix = cxstack_ix;
972 }
973
974 if (cctx->flags & CC_TRACE_LINE)
975 {
976 dSP;
977
978 PL_runops = RUNOPS_DEFAULT;
979 ENTER;
980 SAVETMPS;
981 EXTEND (SP, 3);
982 PL_runops = RUNOPS_DEFAULT;
983 PUSHMARK (SP);
984 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
985 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
986 PUTBACK;
987 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
988 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
989 SPAGAIN;
990 FREETMPS;
991 LEAVE;
992 PL_runops = runops_trace;
993 }
994 }
995 }
996 }
997 }
998
999 TAINT_NOT;
1000 return 0;
1001}
1002
1003/* inject a fake call to Coro::State::_cctx_init into the execution */
1004/* _cctx_init should be careful, as it could be called at almost any time */
1005/* during execution of a perl program */
1006static void NOINLINE
1007cctx_prepare (pTHX_ coro_cctx *cctx)
1008{
1009 dSP;
1010 LOGOP myop;
1011
1012 PL_top_env = &PL_start_env;
1013
1014 if (cctx->flags & CC_TRACE)
1015 PL_runops = runops_trace;
1016
1017 Zero (&myop, 1, LOGOP);
1018 myop.op_next = PL_op;
1019 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1020
1021 PUSHMARK (SP);
1022 EXTEND (SP, 2);
1023 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
1024 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1025 PUTBACK;
1026 PL_op = (OP *)&myop;
1027 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1028 SPAGAIN;
1029}
1030
1031/*
1032 * this is a _very_ stripped down perl interpreter ;)
1033 */
1034static void
1035cctx_run (void *arg)
1036{
1037 dTHX;
1038
1039 /* cctx_run is the alternative tail of transfer(), so unlock here. */
1040 UNLOCK;
1041
1042 /* we now skip the entersub that lead to transfer() */
1043 PL_op = PL_op->op_next;
1044
1045 /* inject a fake subroutine call to cctx_init */
1046 cctx_prepare (aTHX_ (coro_cctx *)arg);
1047
1048 /* somebody or something will hit me for both perl_run and PL_restartop */
1049 PL_restartop = PL_op;
1050 perl_run (PL_curinterp);
1051
1052 /*
1053 * If perl-run returns we assume exit() was being called or the coro
1054 * fell off the end, which seems to be the only valid (non-bug)
1055 * reason for perl_run to return. We try to exit by jumping to the
1056 * bootstrap-time "top" top_env, as we cannot restore the "main"
1057 * coroutine as Coro has no such concept
1058 */
1059 PL_top_env = main_top_env;
1060 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1061}
1062
1063static coro_cctx *
1064cctx_new ()
1065{
1066 coro_cctx *cctx;
1067 void *stack_start;
1068 size_t stack_size;
1069
1070 ++cctx_count;
1071
1072 Newz (0, cctx, 1, coro_cctx);
1073
1074#if HAVE_MMAP
1075 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1076 /* mmap supposedly does allocate-on-write for us */
1077 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1078
1079 if (cctx->sptr != (void *)-1)
1080 {
1081# if CORO_STACKGUARD
1082 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1083# endif
1084 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
1085 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1086 cctx->flags |= CC_MAPPED;
1087 }
1088 else
1089#endif
1090 {
1091 cctx->ssize = coro_stacksize * (long)sizeof (long);
1092 New (0, cctx->sptr, coro_stacksize, long);
1093
1094 if (!cctx->sptr)
1095 {
1096 perror ("FATAL: unable to allocate stack for coroutine");
1097 _exit (EXIT_FAILURE);
1098 }
1099
1100 stack_start = cctx->sptr;
1101 stack_size = cctx->ssize;
1102 }
1103
1104 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1105 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1106
1107 return cctx;
1108}
1109
1110static void
1111cctx_destroy (coro_cctx *cctx)
1112{
1113 if (!cctx)
1114 return;
1115
1116 --cctx_count;
1117
1118#if CORO_USE_VALGRIND
1119 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1120#endif
1121
1122#if HAVE_MMAP
1123 if (cctx->flags & CC_MAPPED)
1124 munmap (cctx->sptr, cctx->ssize);
1125 else
1126#endif
1127 Safefree (cctx->sptr);
1128
1129 Safefree (cctx);
1130}
1131
1132/* wether this cctx should be destructed */
1133#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
1134
1135static coro_cctx *
1136cctx_get (pTHX)
1137{
1138 while (expect_true (cctx_first))
1139 {
1140 coro_cctx *cctx = cctx_first;
1141 cctx_first = cctx->next;
1142 --cctx_idle;
1143
1144 if (expect_true (!CCTX_EXPIRED (cctx)))
1145 return cctx;
1146
1147 cctx_destroy (cctx);
1148 }
1149
1150 return cctx_new ();
1151}
1152
1153static void
1154cctx_put (coro_cctx *cctx)
1155{
1156 /* free another cctx if overlimit */
1157 if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
1158 {
1159 coro_cctx *first = cctx_first;
1160 cctx_first = first->next;
1161 --cctx_idle;
1162
1163 cctx_destroy (first);
1164 }
1165
1166 ++cctx_idle;
1167 cctx->next = cctx_first;
1168 cctx_first = cctx;
1169}
1170
1171/** coroutine switching *****************************************************/
1172
1173static void
1174transfer_check (pTHX_ struct coro *prev, struct coro *next)
1175{
1176 if (expect_true (prev != next))
1177 {
1178 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1179 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1180
1181 if (expect_false (next->flags & CF_RUNNING))
1182 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1183
1184 if (expect_false (next->flags & CF_DESTROYED))
1185 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1186
1187#if !PERL_VERSION_ATLEAST (5,10,0)
1188 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1189 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1190#endif
1191 }
1192}
1193
1194/* always use the TRANSFER macro */
1195static void NOINLINE
1196transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1197{
1198 dSTACKLEVEL;
1199 static volatile int has_throw;
1200
1201 /* sometimes transfer is only called to set idle_sp */
1202 if (expect_false (!next))
1203 {
1204 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1205 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1206 }
1207 else if (expect_true (prev != next))
1208 {
1209 coro_cctx *prev__cctx;
1210
1211 if (expect_false (prev->flags & CF_NEW))
1212 {
1213 /* create a new empty context */
1214 Newz (0, prev->cctx, 1, coro_cctx);
1215 prev->flags &= ~CF_NEW;
1216 prev->flags |= CF_RUNNING;
1217 }
1218
1219 prev->flags &= ~CF_RUNNING;
1220 next->flags |= CF_RUNNING;
1221
1222 LOCK;
1223
1224 /* first get rid of the old state */
1225 save_perl (aTHX_ prev);
1226
1227 if (expect_false (next->flags & CF_NEW))
1228 {
1229 /* need to start coroutine */
1230 next->flags &= ~CF_NEW;
1231 /* setup coroutine call */
1232 coro_setup (aTHX_ next);
1233 }
1234 else
1235 load_perl (aTHX_ next);
1236
1237 prev__cctx = prev->cctx;
1238
1239 /* possibly "free" the cctx */
1240 if (expect_true (
1241 prev__cctx->idle_sp == STACKLEVEL
1242 && !(prev__cctx->flags & CC_TRACE)
1243 && !force_cctx
1244 ))
1245 {
1246 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1247 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
1248
1249 prev->cctx = 0;
1250
1251 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1252 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1253 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1254 if (!next->cctx)
1255 next->cctx = cctx_get (aTHX);
1256
1257 cctx_put (prev__cctx);
1258 }
1259
1260 ++next->usecount;
1261
1262 if (expect_true (!next->cctx))
1263 next->cctx = cctx_get (aTHX);
1264
1265 has_throw = !!next->throw;
1266
1267 if (expect_false (prev__cctx != next->cctx))
1268 {
1269 prev__cctx->top_env = PL_top_env;
1270 PL_top_env = next->cctx->top_env;
1271 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1272 }
1273
1274 free_coro_mortal (aTHX);
1275 UNLOCK;
1276
1277 if (expect_false (has_throw))
1278 {
1279 struct coro *coro = SvSTATE (coro_current);
1280
1281 if (coro->throw)
1282 {
1283 SV *exception = coro->throw;
1284 coro->throw = 0;
1285 sv_setsv (ERRSV, exception);
1286 croak (0);
1287 }
1288 }
1289 }
1290}
1291
1292struct transfer_args
1293{
1294 struct coro *prev, *next;
1295};
1296
1297#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1298#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1299
1300/** high level stuff ********************************************************/
1301
1302static int
1303coro_state_destroy (pTHX_ struct coro *coro)
1304{
1305 if (coro->flags & CF_DESTROYED)
1306 return 0;
1307
1308 coro->flags |= CF_DESTROYED;
1309
1310 if (coro->flags & CF_READY)
1311 {
1312 /* reduce nready, as destroying a ready coro effectively unreadies it */
1313 /* alternative: look through all ready queues and remove the coro */
1314 LOCK;
1315 --coro_nready;
1316 UNLOCK;
1317 }
1318 else
1319 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1320
1321 if (coro->mainstack && coro->mainstack != main_mainstack)
1322 {
1323 struct coro temp;
1324
1325 if (coro->flags & CF_RUNNING)
1326 croak ("FATAL: tried to destroy currently running coroutine");
1327
1328 save_perl (aTHX_ &temp);
1329 load_perl (aTHX_ coro);
1330
1331 coro_destroy (aTHX_ coro);
1332
1333 load_perl (aTHX_ &temp);
1334
1335 coro->slot = 0;
1336 }
1337
1338 cctx_destroy (coro->cctx);
1339 SvREFCNT_dec (coro->args);
1340
1341 if (coro->next) coro->next->prev = coro->prev;
1342 if (coro->prev) coro->prev->next = coro->next;
1343 if (coro == coro_first) coro_first = coro->next;
1344
1345 return 1;
1346}
1347
1348static int
1349coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1350{
1351 struct coro *coro = (struct coro *)mg->mg_ptr;
1352 mg->mg_ptr = 0;
1353
1354 coro->hv = 0;
1355
1356 if (--coro->refcnt < 0)
1357 {
1358 coro_state_destroy (aTHX_ coro);
1359 Safefree (coro);
1360 }
1361
1362 return 0;
1363}
1364
1365static int
1366coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1367{
1368 struct coro *coro = (struct coro *)mg->mg_ptr;
1369
1370 ++coro->refcnt;
1371
1372 return 0;
1373}
1374
1375static MGVTBL coro_state_vtbl = {
1376 0, 0, 0, 0,
1377 coro_state_free,
1378 0,
1379#ifdef MGf_DUP
1380 coro_state_dup,
1381#else
1382# define MGf_DUP 0
1383#endif
1384};
1385
1386static void
1387prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1388{
1389 ta->prev = SvSTATE (prev_sv);
1390 ta->next = SvSTATE (next_sv);
1391 TRANSFER_CHECK (*ta);
1392}
1393
1394static void
1395api_transfer (SV *prev_sv, SV *next_sv)
1396{
1397 dTHX;
1398 struct transfer_args ta;
1399
1400 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1401 TRANSFER (ta, 1);
1402}
1403
1404/** Coro ********************************************************************/
1405
1406static void
1407coro_enq (pTHX_ SV *coro_sv)
1408{
1409 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1410}
1411
1412static SV *
1413coro_deq (pTHX)
1414{
1415 int prio;
1416
1417 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1418 if (AvFILLp (coro_ready [prio]) >= 0)
1419 return av_shift (coro_ready [prio]);
1420
1421 return 0;
1422}
1423
1424static int
1425api_ready (SV *coro_sv)
1426{
1427 dTHX;
1428 struct coro *coro;
1429 SV *sv_hook;
1430 void (*xs_hook)(void);
1431
1432 if (SvROK (coro_sv))
1433 coro_sv = SvRV (coro_sv);
1434
1435 coro = SvSTATE (coro_sv);
1436
1437 if (coro->flags & CF_READY)
1438 return 0;
1439
1440 coro->flags |= CF_READY;
1441
1442 LOCK;
1443
1444 sv_hook = coro_nready ? 0 : coro_readyhook;
1445 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1446
860 coro_enq (SvREFCNT_inc (coro)); 1447 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1448 ++coro_nready;
1449
1450 UNLOCK;
1451
1452 if (sv_hook)
1453 {
1454 dSP;
1455
1456 ENTER;
1457 SAVETMPS;
1458
1459 PUSHMARK (SP);
1460 PUTBACK;
1461 call_sv (sv_hook, G_DISCARD);
1462 SPAGAIN;
1463
1464 FREETMPS;
1465 LEAVE;
1466 }
1467
1468 if (xs_hook)
1469 xs_hook ();
1470
1471 return 1;
1472}
1473
1474static int
1475api_is_ready (SV *coro_sv)
1476{
1477 dTHX;
1478 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1479}
1480
1481static void
1482prepare_schedule (pTHX_ struct transfer_args *ta)
1483{
1484 SV *prev_sv, *next_sv;
1485
1486 for (;;)
1487 {
1488 LOCK;
1489 next_sv = coro_deq (aTHX);
1490
1491 /* nothing to schedule: call the idle handler */
1492 if (expect_false (!next_sv))
1493 {
1494 dSP;
1495 UNLOCK;
1496
1497 ENTER;
1498 SAVETMPS;
1499
1500 PUSHMARK (SP);
1501 PUTBACK;
1502 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1503 SPAGAIN;
1504
1505 FREETMPS;
1506 LEAVE;
1507 continue;
1508 }
1509
1510 ta->next = SvSTATE (next_sv);
1511
1512 /* cannot transfer to destroyed coros, skip and look for next */
1513 if (expect_false (ta->next->flags & CF_DESTROYED))
1514 {
1515 UNLOCK;
1516 SvREFCNT_dec (next_sv);
1517 /* coro_nready is already taken care of by destroy */
1518 continue;
1519 }
1520
1521 --coro_nready;
1522 UNLOCK;
1523 break;
1524 }
1525
1526 /* free this only after the transfer */
1527 prev_sv = SvRV (coro_current);
1528 ta->prev = SvSTATE (prev_sv);
1529 TRANSFER_CHECK (*ta);
1530 assert (ta->next->flags & CF_READY);
1531 ta->next->flags &= ~CF_READY;
1532 SvRV_set (coro_current, next_sv);
1533
1534 LOCK;
1535 free_coro_mortal (aTHX);
1536 coro_mortal = prev_sv;
1537 UNLOCK;
1538}
1539
1540static void
1541prepare_cede (pTHX_ struct transfer_args *ta)
1542{
1543 api_ready (coro_current);
1544 prepare_schedule (aTHX_ ta);
1545}
1546
1547static int
1548prepare_cede_notself (pTHX_ struct transfer_args *ta)
1549{
1550 if (coro_nready)
1551 {
1552 SV *prev = SvRV (coro_current);
1553 prepare_schedule (aTHX_ ta);
1554 api_ready (prev);
1555 return 1;
1556 }
1557 else
1558 return 0;
861} 1559}
862 1560
863static void 1561static void
864api_schedule (void) 1562api_schedule (void)
865{ 1563{
866 SV *prev, *next; 1564 dTHX;
1565 struct transfer_args ta;
867 1566
868 prev = SvRV (GvSV (coro_current)); 1567 prepare_schedule (aTHX_ &ta);
869 next = coro_deq (PRIO_MIN); 1568 TRANSFER (ta, 1);
1569}
870 1570
871 if (!next) 1571static int
872 next = SvREFCNT_inc (SvRV (GvSV (coro_idle))); 1572api_cede (void)
1573{
1574 dTHX;
1575 struct transfer_args ta;
873 1576
874 /* free this only after the transfer */ 1577 prepare_cede (aTHX_ &ta);
875 coro_mortal = prev;
876 SV_CORO (prev, "Coro::schedule");
877 1578
878 SvRV (GvSV (coro_current)) = next; 1579 if (expect_true (ta.prev != ta.next))
1580 {
1581 TRANSFER (ta, 1);
1582 return 1;
1583 }
1584 else
1585 return 0;
1586}
879 1587
880 SV_CORO (next, "Coro::schedule"); 1588static int
1589api_cede_notself (void)
1590{
1591 dTHX;
1592 struct transfer_args ta;
881 1593
882 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), 1594 if (prepare_cede_notself (aTHX_ &ta))
883 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK); 1595 {
1596 TRANSFER (ta, 1);
1597 return 1;
1598 }
1599 else
1600 return 0;
884} 1601}
885 1602
886static void 1603static void
887api_cede (void) 1604api_trace (SV *coro_sv, int flags)
888{ 1605{
889 coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current)))); 1606 dTHX;
1607 struct coro *coro = SvSTATE (coro_sv);
890 1608
891 api_schedule (); 1609 if (flags & CC_TRACE)
892} 1610 {
1611 if (!coro->cctx)
1612 coro->cctx = cctx_new ();
1613 else if (!(coro->cctx->flags & CC_TRACE))
1614 croak ("cannot enable tracing on coroutine with custom stack");
893 1615
1616 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1617 }
1618 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1619 {
1620 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1621
1622 if (coro->flags & CF_RUNNING)
1623 PL_runops = RUNOPS_DEFAULT;
1624 else
1625 coro->slot->runops = RUNOPS_DEFAULT;
1626 }
1627}
1628
894MODULE = Coro::State PACKAGE = Coro::State 1629MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
895 1630
896PROTOTYPES: ENABLE 1631PROTOTYPES: DISABLE
897 1632
898BOOT: 1633BOOT:
899{ /* {} necessary for stoopid perl-5.6.x */ 1634{
900 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 1635#ifdef USE_ITHREADS
901 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 1636 MUTEX_INIT (&coro_mutex);
1637#endif
1638 BOOT_PAGESIZE;
1639
1640 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1641 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1642
1643 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1644 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1645 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1646
1647 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1648 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1649 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1650
902 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1651 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
903 1652
904 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1653 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
905 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
906 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
907 newCONSTSUB (coro_state_stash, "SAVE_CURPM", newSViv (TRANSFER_SAVE_CURPM)); 1654 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1655 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
908 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1656 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
909
910 if (!padlist_cache)
911 padlist_cache = newHV ();
912 1657
913 main_mainstack = PL_mainstack; 1658 main_mainstack = PL_mainstack;
1659 main_top_env = PL_top_env;
914 1660
1661 while (main_top_env->je_prev)
1662 main_top_env = main_top_env->je_prev;
1663
915 coroapi.ver = CORO_API_VERSION; 1664 coroapi.ver = CORO_API_VERSION;
1665 coroapi.rev = CORO_API_REVISION;
916 coroapi.transfer = api_transfer; 1666 coroapi.transfer = api_transfer;
917}
918 1667
919Coro::State 1668 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
920_newprocess(args) 1669}
921 SV * args 1670
922 PROTOTYPE: $ 1671SV *
1672new (char *klass, ...)
923 CODE: 1673 CODE:
924 Coro__State coro; 1674{
1675 struct coro *coro;
1676 MAGIC *mg;
1677 HV *hv;
1678 int i;
925 1679
926 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
927 croak ("Coro::State::_newprocess expects an arrayref");
928
929 New (0, coro, 1, struct coro); 1680 Newz (0, coro, 1, struct coro);
1681 coro->args = newAV ();
1682 coro->flags = CF_NEW;
930 1683
931 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1684 if (coro_first) coro_first->prev = coro;
932 coro->mainstack = 0; /* actual work is done inside transfer */ 1685 coro->next = coro_first;
933 coro->stack = 0; 1686 coro_first = coro;
934 1687
935 RETVAL = coro; 1688 coro->hv = hv = newHV ();
1689 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1690 mg->mg_flags |= MGf_DUP;
1691 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1692
1693 av_extend (coro->args, items - 1);
1694 for (i = 1; i < items; i++)
1695 av_push (coro->args, newSVsv (ST (i)));
1696}
936 OUTPUT: 1697 OUTPUT:
937 RETVAL 1698 RETVAL
938 1699
1700# these not obviously related functions are all rolled into the same xs
1701# function to increase chances that they all will call transfer with the same
1702# stack offset
939void 1703void
940transfer(prev, next, flags) 1704_set_stacklevel (...)
941 SV *prev 1705 ALIAS:
942 SV *next 1706 Coro::State::transfer = 1
943 int flags 1707 Coro::schedule = 2
944 PROTOTYPE: @ 1708 Coro::cede = 3
1709 Coro::cede_notself = 4
945 CODE: 1710 CODE:
1711{
1712 struct transfer_args ta;
1713
946 PUTBACK; 1714 PUTBACK;
947 SV_CORO (next, "Coro::transfer"); 1715 switch (ix)
948 SV_CORO (prev, "Coro::transfer"); 1716 {
949 transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags); 1717 case 0:
1718 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1719 ta.next = 0;
1720 break;
1721
1722 case 1:
1723 if (items != 2)
1724 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1725
1726 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1727 break;
1728
1729 case 2:
1730 prepare_schedule (aTHX_ &ta);
1731 break;
1732
1733 case 3:
1734 prepare_cede (aTHX_ &ta);
1735 break;
1736
1737 case 4:
1738 if (!prepare_cede_notself (aTHX_ &ta))
1739 XSRETURN_EMPTY;
1740
1741 break;
1742 }
950 SPAGAIN; 1743 SPAGAIN;
951 1744
1745 BARRIER;
1746 PUTBACK;
1747 TRANSFER (ta, 0);
1748 SPAGAIN; /* might be the sp of a different coroutine now */
1749 /* be extra careful not to ever do anything after TRANSFER */
1750}
1751
1752bool
1753_destroy (SV *coro_sv)
1754 CODE:
1755 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1756 OUTPUT:
1757 RETVAL
1758
952void 1759void
953DESTROY(coro) 1760_exit (int code)
954 Coro::State coro 1761 PROTOTYPE: $
955 CODE: 1762 CODE:
1763 _exit (code);
956 1764
957 if (coro->mainstack && coro->mainstack != main_mainstack) 1765int
1766cctx_stacksize (int new_stacksize = 0)
1767 CODE:
1768 RETVAL = coro_stacksize;
1769 if (new_stacksize)
1770 coro_stacksize = new_stacksize;
1771 OUTPUT:
1772 RETVAL
1773
1774int
1775cctx_count ()
1776 CODE:
1777 RETVAL = cctx_count;
1778 OUTPUT:
1779 RETVAL
1780
1781int
1782cctx_idle ()
1783 CODE:
1784 RETVAL = cctx_idle;
1785 OUTPUT:
1786 RETVAL
1787
1788void
1789list ()
1790 PPCODE:
1791{
1792 struct coro *coro;
1793 for (coro = coro_first; coro; coro = coro->next)
1794 if (coro->hv)
1795 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1796}
1797
1798void
1799call (Coro::State coro, SV *coderef)
1800 ALIAS:
1801 eval = 1
1802 CODE:
1803{
1804 if (coro->mainstack)
958 { 1805 {
959 struct coro temp; 1806 struct coro temp;
960 1807
1808 if (!(coro->flags & CF_RUNNING))
1809 {
1810 PUTBACK;
1811 save_perl (aTHX_ &temp);
1812 load_perl (aTHX_ coro);
1813 }
1814
1815 {
1816 dSP;
1817 ENTER;
1818 SAVETMPS;
961 PUTBACK; 1819 PUTBACK;
962 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 1820 PUSHSTACK;
963 LOAD(aTHX_ coro); 1821 PUSHMARK (SP);
1822
1823 if (ix)
1824 eval_sv (coderef, 0);
1825 else
1826 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1827
1828 POPSTACK;
964 SPAGAIN; 1829 SPAGAIN;
1830 FREETMPS;
1831 LEAVE;
1832 PUTBACK;
1833 }
965 1834
966 destroy_stacks (aTHX); 1835 if (!(coro->flags & CF_RUNNING))
967 1836 {
968 LOAD((&temp)); /* this will get rid of defsv etc.. */ 1837 save_perl (aTHX_ coro);
1838 load_perl (aTHX_ &temp);
969 SPAGAIN; 1839 SPAGAIN;
970 1840 }
971 coro->mainstack = 0;
972 } 1841 }
1842}
973 1843
974 deallocate_stack (coro); 1844SV *
975 1845is_ready (Coro::State coro)
976 Safefree (coro); 1846 PROTOTYPE: $
1847 ALIAS:
1848 is_ready = CF_READY
1849 is_running = CF_RUNNING
1850 is_new = CF_NEW
1851 is_destroyed = CF_DESTROYED
1852 CODE:
1853 RETVAL = boolSV (coro->flags & ix);
1854 OUTPUT:
1855 RETVAL
977 1856
978void 1857void
979flush() 1858api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
980 CODE:
981#ifdef MAY_FLUSH
982 flush_padlist_cache ();
983#endif
984 1859
985void 1860SV *
986_exit(code) 1861has_cctx (Coro::State coro)
987 int code
988 PROTOTYPE: $ 1862 PROTOTYPE: $
989 CODE: 1863 CODE:
990#if defined(__GLIBC__) || _POSIX_C_SOURCE 1864 RETVAL = boolSV (!!coro->cctx);
991 _exit (code); 1865 OUTPUT:
992#else 1866 RETVAL
993 signal (SIGTERM, SIG_DFL);
994 raise (SIGTERM);
995 exit (code);
996#endif
997 1867
998MODULE = Coro::State PACKAGE = Coro::Cont 1868int
1869is_traced (Coro::State coro)
1870 PROTOTYPE: $
1871 CODE:
1872 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1873 OUTPUT:
1874 RETVAL
999 1875
1000# this is slightly dirty (should expose a c-level api) 1876IV
1877rss (Coro::State coro)
1878 PROTOTYPE: $
1879 ALIAS:
1880 usecount = 1
1881 CODE:
1882 switch (ix)
1883 {
1884 case 0: RETVAL = coro_rss (aTHX_ coro); break;
1885 case 1: RETVAL = coro->usecount; break;
1886 }
1887 OUTPUT:
1888 RETVAL
1001 1889
1002void 1890void
1003yield(...) 1891force_cctx ()
1004 PROTOTYPE: @ 1892 CODE:
1005 CODE: 1893 struct coro *coro = SvSTATE (coro_current);
1006 static SV *returnstk; 1894 coro->cctx->idle_sp = 0;
1007 SV *sv;
1008 AV *defav = GvAV (PL_defgv);
1009 struct coro *prev, *next;
1010
1011 if (!returnstk)
1012 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
1013
1014 /* set up @_ -- ugly */
1015 av_clear (defav);
1016 av_fill (defav, items - 1);
1017 while (items--)
1018 av_store (defav, items, SvREFCNT_inc (ST(items)));
1019
1020 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1021 sv = av_pop ((AV *)SvRV (returnstk));
1022 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1023 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1024 SvREFCNT_dec (sv);
1025
1026 transfer(aTHX_ prev, next, 0);
1027 1895
1028MODULE = Coro::State PACKAGE = Coro 1896MODULE = Coro::State PACKAGE = Coro
1029 1897
1030# this is slightly dirty (should expose a c-level api)
1031
1032BOOT: 1898BOOT:
1033{ 1899{
1034 int i; 1900 int i;
1901
1902 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
1903 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1904 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
1905
1906 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
1907 SvREADONLY_on (coro_current);
1908
1035 HV *stash = gv_stashpv ("Coro", TRUE); 1909 coro_stash = gv_stashpv ("Coro", TRUE);
1036 1910
1037 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1911 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1038 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1912 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1039 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1913 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1040 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1914 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1041 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1915 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1042 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1916 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1043
1044 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1045 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1046 1917
1047 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1918 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1048 coro_ready[i] = newAV (); 1919 coro_ready[i] = newAV ();
1049 1920
1050 { 1921 {
1051 SV *sv = perl_get_sv("Coro::API", 1); 1922 SV *sv = perl_get_sv ("Coro::API", TRUE);
1923 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1052 1924
1053 coroapi.schedule = api_schedule; 1925 coroapi.schedule = api_schedule;
1054 coroapi.cede = api_cede; 1926 coroapi.cede = api_cede;
1927 coroapi.cede_notself = api_cede_notself;
1055 coroapi.ready = api_ready; 1928 coroapi.ready = api_ready;
1929 coroapi.is_ready = api_is_ready;
1056 coroapi.nready = &coro_nready; 1930 coroapi.nready = &coro_nready;
1057 coroapi.current = coro_current; 1931 coroapi.current = coro_current;
1058 1932
1059 GCoroAPI = &coroapi; 1933 GCoroAPI = &coroapi;
1060 sv_setiv(sv, (IV)&coroapi); 1934 sv_setiv (sv, (IV)&coroapi);
1061 SvREADONLY_on(sv); 1935 SvREADONLY_on (sv);
1062 } 1936 }
1063} 1937}
1064 1938
1065void 1939void
1066ready(self) 1940_set_current (SV *current)
1067 SV * self
1068 PROTOTYPE: $ 1941 PROTOTYPE: $
1069 CODE: 1942 CODE:
1070 api_ready (self); 1943 SvREFCNT_dec (SvRV (coro_current));
1944 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1945
1946void
1947_set_readyhook (SV *hook)
1948 PROTOTYPE: $
1949 CODE:
1950 LOCK;
1951 SvREFCNT_dec (coro_readyhook);
1952 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1953 UNLOCK;
1071 1954
1072int 1955int
1956prio (Coro::State coro, int newprio = 0)
1957 ALIAS:
1958 nice = 1
1959 CODE:
1960{
1961 RETVAL = coro->prio;
1962
1963 if (items > 1)
1964 {
1965 if (ix)
1966 newprio = coro->prio - newprio;
1967
1968 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1969 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1970
1971 coro->prio = newprio;
1972 }
1973}
1974 OUTPUT:
1975 RETVAL
1976
1977SV *
1978ready (SV *self)
1979 PROTOTYPE: $
1980 CODE:
1981 RETVAL = boolSV (api_ready (self));
1982 OUTPUT:
1983 RETVAL
1984
1985int
1073nready(...) 1986nready (...)
1074 PROTOTYPE: 1987 PROTOTYPE:
1075 CODE: 1988 CODE:
1076 RETVAL = coro_nready; 1989 RETVAL = coro_nready;
1077 OUTPUT: 1990 OUTPUT:
1078 RETVAL 1991 RETVAL
1079 1992
1080void 1993void
1081schedule(...) 1994throw (Coro::State self, SV *throw = &PL_sv_undef)
1995 PROTOTYPE: $;$
1996 CODE:
1997 SvREFCNT_dec (self->throw);
1998 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1999
2000void
2001swap_defsv (Coro::State self)
1082 PROTOTYPE: 2002 PROTOTYPE: $
2003 ALIAS:
2004 swap_defav = 1
2005 CODE:
2006 if (!self->slot)
2007 croak ("cannot swap state with coroutine that has no saved state");
2008 else
2009 {
2010 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2011 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
2012
2013 SV *tmp = *src; *src = *dst; *dst = tmp;
2014 }
2015
2016# for async_pool speedup
2017void
2018_pool_1 (SV *cb)
1083 CODE: 2019 CODE:
1084 api_schedule (); 2020{
2021 struct coro *coro = SvSTATE (coro_current);
2022 HV *hv = (HV *)SvRV (coro_current);
2023 AV *defav = GvAV (PL_defgv);
2024 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2025 AV *invoke_av;
2026 int i, len;
2027
2028 if (!invoke)
2029 {
2030 SV *old = PL_diehook;
2031 PL_diehook = 0;
2032 SvREFCNT_dec (old);
2033 croak ("\3async_pool terminate\2\n");
2034 }
2035
2036 SvREFCNT_dec (coro->saved_deffh);
2037 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
2038
2039 hv_store (hv, "desc", sizeof ("desc") - 1,
2040 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2041
2042 invoke_av = (AV *)SvRV (invoke);
2043 len = av_len (invoke_av);
2044
2045 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2046
2047 if (len > 0)
2048 {
2049 av_fill (defav, len - 1);
2050 for (i = 0; i < len; ++i)
2051 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
2052 }
2053
2054 SvREFCNT_dec (invoke);
2055}
1085 2056
1086void 2057void
1087cede(...) 2058_pool_2 (SV *cb)
1088 PROTOTYPE:
1089 CODE: 2059 CODE:
2060{
2061 struct coro *coro = SvSTATE (coro_current);
2062
2063 sv_setsv (cb, &PL_sv_undef);
2064
2065 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2066 coro->saved_deffh = 0;
2067
2068 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
2069 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2070 {
2071 SV *old = PL_diehook;
2072 PL_diehook = 0;
2073 SvREFCNT_dec (old);
2074 croak ("\3async_pool terminate\2\n");
2075 }
2076
2077 av_clear (GvAV (PL_defgv));
2078 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2079 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2080
2081 coro->prio = 0;
2082
2083 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2084 api_trace (coro_current, 0);
2085
2086 av_push (av_async_pool, newSVsv (coro_current));
2087}
2088
2089
2090MODULE = Coro::State PACKAGE = Coro::AIO
2091
2092SV *
2093_get_state ()
2094 CODE:
2095{
2096 struct io_state *data;
2097
2098 RETVAL = newSV (sizeof (struct io_state));
2099 data = (struct io_state *)SvPVX (RETVAL);
2100 SvCUR_set (RETVAL, sizeof (struct io_state));
2101 SvPOK_only (RETVAL);
2102
2103 data->errorno = errno;
2104 data->laststype = PL_laststype;
2105 data->laststatval = PL_laststatval;
2106 data->statcache = PL_statcache;
2107}
2108 OUTPUT:
2109 RETVAL
2110
2111void
2112_set_state (char *data_)
2113 PROTOTYPE: $
2114 CODE:
2115{
2116 struct io_state *data = (void *)data_;
2117
2118 errno = data->errorno;
2119 PL_laststype = data->laststype;
2120 PL_laststatval = data->laststatval;
2121 PL_statcache = data->statcache;
2122}
2123
2124
2125MODULE = Coro::State PACKAGE = Coro::AnyEvent
2126
2127BOOT:
2128 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2129
2130SV *
2131_schedule (...)
2132 PROTOTYPE: @
2133 CODE:
2134{
2135 static int incede;
2136
1090 api_cede (); 2137 api_cede_notself ();
1091 2138
2139 ++incede;
2140 while (coro_nready >= incede && api_cede ())
2141 ;
2142
2143 sv_setsv (sv_activity, &PL_sv_undef);
2144 if (coro_nready >= incede)
2145 {
2146 PUSHMARK (SP);
2147 PUTBACK;
2148 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2149 SPAGAIN;
2150 }
2151
2152 --incede;
2153}
2154

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