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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 1.244 by root, Sun Sep 21 18:29:39 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 SvREFCNT_dec (av);
367
368 return 0;
369}
370
371#define CORO_MAGIC_type_cv PERL_MAGIC_ext
372#define CORO_MAGIC_type_state PERL_MAGIC_ext
373
374static MGVTBL coro_cv_vtbl = {
375 0, 0, 0, 0,
376 coro_cv_free
377};
378
379#define CORO_MAGIC(sv,type) \
380 SvMAGIC (sv) \
381 ? SvMAGIC (sv)->mg_type == type \
382 ? SvMAGIC (sv) \
383 : mg_find (sv, type) \
384 : 0
385
386#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
387#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
388
389static struct coro *
390SvSTATE_ (pTHX_ SV *coro)
391{
392 HV *stash;
393 MAGIC *mg;
394
395 if (SvROK (coro))
396 coro = SvRV (coro);
397
398 if (expect_false (SvTYPE (coro) != SVt_PVHV))
399 croak ("Coro::State object required");
400
401 stash = SvSTASH (coro);
402 if (expect_false (stash != coro_stash && stash != coro_state_stash))
403 {
404 /* very slow, but rare, check */
405 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
406 croak ("Coro::State object required");
407 }
408
409 mg = CORO_MAGIC_state (coro);
410 return (struct coro *)mg->mg_ptr;
411}
412
413#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
414
415/* the next two functions merely cache the padlists */
416static void
417get_padlist (pTHX_ CV *cv)
418{
419 MAGIC *mg = CORO_MAGIC_cv (cv);
420 AV *av;
421
422 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
423 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
424 else
425 {
426#if CORO_PREFER_PERL_FUNCTIONS
427 /* this is probably cleaner? but also slower! */
428 /* in practise, it seems to be less stable */
429 CV *cp = Perl_cv_clone (cv);
430 CvPADLIST (cv) = CvPADLIST (cp);
431 CvPADLIST (cp) = 0;
432 SvREFCNT_dec (cp);
433#else
434 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
435#endif
824 } 436 }
437}
825 438
826 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 439static void
440put_padlist (pTHX_ CV *cv)
441{
442 MAGIC *mg = CORO_MAGIC_cv (cv);
443 AV *av;
444
445 if (expect_false (!mg))
446 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
447
448 av = (AV *)mg->mg_obj;
449
450 if (expect_false (AvFILLp (av) >= AvMAX (av)))
451 av_extend (av, AvMAX (av) + 1);
452
453 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
454}
455
456/** load & save, init *******************************************************/
457
458static void
459load_perl (pTHX_ Coro__State c)
460{
461 perl_slots *slot = c->slot;
462 c->slot = 0;
463
464 PL_mainstack = c->mainstack;
465
466 GvSV (PL_defgv) = slot->defsv;
467 GvAV (PL_defgv) = slot->defav;
468 GvSV (PL_errgv) = slot->errsv;
469 GvSV (irsgv) = slot->irsgv;
470
471 #define VAR(name,type) PL_ ## name = slot->name;
472 # include "state.h"
473 #undef VAR
474
475 {
476 dSP;
477
478 CV *cv;
479
480 /* now do the ugly restore mess */
481 while (expect_true (cv = (CV *)POPs))
482 {
483 put_padlist (aTHX_ cv); /* mark this padlist as available */
484 CvDEPTH (cv) = PTR2IV (POPs);
485 CvPADLIST (cv) = (AV *)POPs;
486 }
487
488 PUTBACK;
489 }
490}
491
492static void
493save_perl (pTHX_ Coro__State c)
494{
495 {
496 dSP;
497 I32 cxix = cxstack_ix;
498 PERL_CONTEXT *ccstk = cxstack;
499 PERL_SI *top_si = PL_curstackinfo;
500
501 /*
502 * the worst thing you can imagine happens first - we have to save
503 * (and reinitialize) all cv's in the whole callchain :(
504 */
505
506 XPUSHs (Nullsv);
507 /* this loop was inspired by pp_caller */
508 for (;;)
509 {
510 while (expect_true (cxix >= 0))
511 {
512 PERL_CONTEXT *cx = &ccstk[cxix--];
513
514 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
515 {
516 CV *cv = cx->blk_sub.cv;
517
518 if (expect_true (CvDEPTH (cv)))
519 {
520 EXTEND (SP, 3);
521 PUSHs ((SV *)CvPADLIST (cv));
522 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
523 PUSHs ((SV *)cv);
524
525 CvDEPTH (cv) = 0;
526 get_padlist (aTHX_ cv);
527 }
528 }
529 }
530
531 if (expect_true (top_si->si_type == PERLSI_MAIN))
532 break;
533
534 top_si = top_si->si_prev;
535 ccstk = top_si->si_cxstack;
536 cxix = top_si->si_cxix;
537 }
538
539 PUTBACK;
540 }
541
542 /* allocate some space on the context stack for our purposes */
543 /* we manually unroll here, as usually 2 slots is enough */
544 if (SLOT_COUNT >= 1) CXINC;
545 if (SLOT_COUNT >= 2) CXINC;
546 if (SLOT_COUNT >= 3) CXINC;
547 {
548 int i;
549 for (i = 3; i < SLOT_COUNT; ++i)
550 CXINC;
551 }
552 cxstack_ix -= SLOT_COUNT; /* undo allocation */
553
554 c->mainstack = PL_mainstack;
555
556 {
557 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
558
559 slot->defav = GvAV (PL_defgv);
560 slot->defsv = DEFSV;
561 slot->errsv = ERRSV;
562 slot->irsgv = GvSV (irsgv);
563
564 #define VAR(name,type) slot->name = PL_ ## name;
565 # include "state.h"
566 #undef VAR
567 }
568}
569
570/*
571 * allocate various perl stacks. This is an exact copy
572 * of perl.c:init_stacks, except that it uses less memory
573 * on the (sometimes correct) assumption that coroutines do
574 * not usually need a lot of stackspace.
575 */
576#if CORO_PREFER_PERL_FUNCTIONS
577# define coro_init_stacks init_stacks
578#else
579static void
580coro_init_stacks (pTHX)
581{
582 PL_curstackinfo = new_stackinfo(32, 8);
583 PL_curstackinfo->si_type = PERLSI_MAIN;
584 PL_curstack = PL_curstackinfo->si_stack;
585 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
586
587 PL_stack_base = AvARRAY(PL_curstack);
588 PL_stack_sp = PL_stack_base;
589 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
590
591 New(50,PL_tmps_stack,32,SV*);
592 PL_tmps_floor = -1;
593 PL_tmps_ix = -1;
594 PL_tmps_max = 32;
595
596 New(54,PL_markstack,16,I32);
597 PL_markstack_ptr = PL_markstack;
598 PL_markstack_max = PL_markstack + 16;
599
600#ifdef SET_MARK_OFFSET
601 SET_MARK_OFFSET;
602#endif
603
604 New(54,PL_scopestack,8,I32);
605 PL_scopestack_ix = 0;
606 PL_scopestack_max = 8;
607
608 New(54,PL_savestack,24,ANY);
609 PL_savestack_ix = 0;
610 PL_savestack_max = 24;
611
612#if !PERL_VERSION_ATLEAST (5,10,0)
613 New(54,PL_retstack,4,OP*);
614 PL_retstack_ix = 0;
615 PL_retstack_max = 4;
616#endif
617}
618#endif
619
620/*
621 * destroy the stacks, the callchain etc...
622 */
623static void
624coro_destroy_stacks (pTHX)
625{
626 while (PL_curstackinfo->si_next)
627 PL_curstackinfo = PL_curstackinfo->si_next;
628
629 while (PL_curstackinfo)
630 {
631 PERL_SI *p = PL_curstackinfo->si_prev;
632
633 if (!IN_DESTRUCT)
634 SvREFCNT_dec (PL_curstackinfo->si_stack);
635
636 Safefree (PL_curstackinfo->si_cxstack);
637 Safefree (PL_curstackinfo);
638 PL_curstackinfo = p;
639 }
640
641 Safefree (PL_tmps_stack);
642 Safefree (PL_markstack);
643 Safefree (PL_scopestack);
644 Safefree (PL_savestack);
645#if !PERL_VERSION_ATLEAST (5,10,0)
646 Safefree (PL_retstack);
647#endif
648}
649
650static size_t
651coro_rss (pTHX_ struct coro *coro)
652{
653 size_t rss = sizeof (*coro);
654
655 if (coro->mainstack)
656 {
657 perl_slots tmp_slot;
658 perl_slots *slot;
659
660 if (coro->flags & CF_RUNNING)
661 {
662 slot = &tmp_slot;
663
664 #define VAR(name,type) slot->name = PL_ ## name;
665 # include "state.h"
666 #undef VAR
667 }
668 else
669 slot = coro->slot;
670
671 rss += sizeof (slot->curstackinfo);
672 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
673 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
674 rss += slot->tmps_max * sizeof (SV *);
675 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
676 rss += slot->scopestack_max * sizeof (I32);
677 rss += slot->savestack_max * sizeof (ANY);
678
679#if !PERL_VERSION_ATLEAST (5,10,0)
680 rss += slot->retstack_max * sizeof (OP *);
681#endif
682 }
683
684 return rss;
685}
686
687/** coroutine stack handling ************************************************/
688
689static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
690static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
691static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
692
693/* apparently < 5.8.8 */
694#ifndef MgPV_nolen_const
695#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
696 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
697 (const char*)(mg)->mg_ptr)
698#endif
699
700/*
701 * This overrides the default magic get method of %SIG elements.
702 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
703 * and instead of tryign to save and restore the hash elements, we just provide
704 * readback here.
705 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
706 * not expecting this to actually change the hook. This is a potential problem
707 * when a schedule happens then, but we ignore this.
708 */
709static int
710coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
711{
712 const char *s = MgPV_nolen_const (mg);
713
714 if (*s == '_')
715 {
716 SV **svp = 0;
717
718 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
719 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
720
721 if (svp)
722 {
723 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
724 return 0;
725 }
726 }
727
728 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
729}
730
731static int
732coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
733{
734 const char *s = MgPV_nolen_const (mg);
735
736 if (*s == '_')
737 {
738 SV **svp = 0;
739
740 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
741 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
742
743 if (svp)
744 {
745 SV *old = *svp;
746 *svp = 0;
747 SvREFCNT_dec (old);
748 return 0;
749 }
750 }
751
752 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
753}
754
755static int
756coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
757{
758 const char *s = MgPV_nolen_const (mg);
759
760 if (*s == '_')
761 {
762 SV **svp = 0;
763
764 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
765 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
766
767 if (svp)
768 {
769 SV *old = *svp;
770 *svp = newSVsv (sv);
771 SvREFCNT_dec (old);
772 return 0;
773 }
774 }
775
776 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
777}
778
779static void
780coro_setup (pTHX_ struct coro *coro)
781{
782 /*
783 * emulate part of the perl startup here.
784 */
785 coro_init_stacks (aTHX);
786
787 PL_runops = RUNOPS_DEFAULT;
788 PL_curcop = &PL_compiling;
789 PL_in_eval = EVAL_NULL;
790 PL_comppad = 0;
791 PL_curpm = 0;
792 PL_curpad = 0;
793 PL_localizing = 0;
794 PL_dirty = 0;
795 PL_restartop = 0;
796#if PERL_VERSION_ATLEAST (5,10,0)
797 PL_parser = 0;
798#endif
799
800 /* recreate the die/warn hooks */
801 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
802 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
803
804 GvSV (PL_defgv) = newSV (0);
805 GvAV (PL_defgv) = coro->args; coro->args = 0;
806 GvSV (PL_errgv) = newSV (0);
807 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
808 PL_rs = newSVsv (GvSV (irsgv));
809 PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
810
811 {
812 dSP;
813 LOGOP myop;
814
815 Zero (&myop, 1, LOGOP);
816 myop.op_next = Nullop;
817 myop.op_flags = OPf_WANT_VOID;
818
819 PUSHMARK (SP);
820 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
821 PUTBACK;
822 PL_op = (OP *)&myop;
823 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
824 SPAGAIN;
825 }
826
827 /* this newly created coroutine might be run on an existing cctx which most
828 * likely was suspended in set_stacklevel, called from entersub.
829 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
830 * so we ENTER here for symmetry
831 */
832 ENTER;
833}
834
835static void
836coro_destroy (pTHX_ struct coro *coro)
837{
838 if (!IN_DESTRUCT)
839 {
840 /* restore all saved variables and stuff */
841 LEAVE_SCOPE (0);
842 assert (PL_tmps_floor == -1);
843
844 /* free all temporaries */
845 FREETMPS;
846 assert (PL_tmps_ix == -1);
847
848 /* unwind all extra stacks */
849 POPSTACK_TO (PL_mainstack);
850
851 /* unwind main stack */
852 dounwind (-1);
853 }
854
855 SvREFCNT_dec (GvSV (PL_defgv));
856 SvREFCNT_dec (GvAV (PL_defgv));
857 SvREFCNT_dec (GvSV (PL_errgv));
858 SvREFCNT_dec (PL_defoutgv);
859 SvREFCNT_dec (PL_rs);
860 SvREFCNT_dec (GvSV (irsgv));
861
862 SvREFCNT_dec (PL_diehook);
863 SvREFCNT_dec (PL_warnhook);
864
865 SvREFCNT_dec (coro->saved_deffh);
866 SvREFCNT_dec (coro->throw);
867
868 coro_destroy_stacks (aTHX);
869}
870
871static void
872free_coro_mortal (pTHX)
873{
874 if (expect_true (coro_mortal))
875 {
876 SvREFCNT_dec (coro_mortal);
877 coro_mortal = 0;
878 }
879}
880
881static int
882runops_trace (pTHX)
883{
884 COP *oldcop = 0;
885 int oldcxix = -2;
886 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
887 coro_cctx *cctx = coro->cctx;
888
889 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
890 {
891 PERL_ASYNC_CHECK ();
892
893 if (cctx->flags & CC_TRACE_ALL)
894 {
895 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
896 {
897 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
898 SV **bot, **top;
899 AV *av = newAV (); /* return values */
900 SV **cb;
901 dSP;
902
903 GV *gv = CvGV (cx->blk_sub.cv);
904 SV *fullname = sv_2mortal (newSV (0));
905 if (isGV (gv))
906 gv_efullname3 (fullname, gv, 0);
907
908 bot = PL_stack_base + cx->blk_oldsp + 1;
909 top = cx->blk_gimme == G_ARRAY ? SP + 1
910 : cx->blk_gimme == G_SCALAR ? bot + 1
911 : bot;
912
913 av_extend (av, top - bot);
914 while (bot < top)
915 av_push (av, SvREFCNT_inc (*bot++));
916
917 PL_runops = RUNOPS_DEFAULT;
918 ENTER;
919 SAVETMPS;
920 EXTEND (SP, 3);
921 PUSHMARK (SP);
922 PUSHs (&PL_sv_no);
923 PUSHs (fullname);
924 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
925 PUTBACK;
926 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
927 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
928 SPAGAIN;
929 FREETMPS;
930 LEAVE;
931 PL_runops = runops_trace;
932 }
933
934 if (oldcop != PL_curcop)
935 {
936 oldcop = PL_curcop;
937
938 if (PL_curcop != &PL_compiling)
939 {
940 SV **cb;
941
942 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
943 {
944 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
945
946 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
947 {
948 runops_proc_t old_runops = PL_runops;
949 dSP;
950 GV *gv = CvGV (cx->blk_sub.cv);
951 SV *fullname = sv_2mortal (newSV (0));
952
953 if (isGV (gv))
954 gv_efullname3 (fullname, gv, 0);
955
956 PL_runops = RUNOPS_DEFAULT;
957 ENTER;
958 SAVETMPS;
959 EXTEND (SP, 3);
960 PUSHMARK (SP);
961 PUSHs (&PL_sv_yes);
962 PUSHs (fullname);
963 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
964 PUTBACK;
965 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
966 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
967 SPAGAIN;
968 FREETMPS;
969 LEAVE;
970 PL_runops = runops_trace;
971 }
972
973 oldcxix = cxstack_ix;
974 }
975
976 if (cctx->flags & CC_TRACE_LINE)
977 {
978 dSP;
979
980 PL_runops = RUNOPS_DEFAULT;
981 ENTER;
982 SAVETMPS;
983 EXTEND (SP, 3);
984 PL_runops = RUNOPS_DEFAULT;
985 PUSHMARK (SP);
986 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
987 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
988 PUTBACK;
989 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
990 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
991 SPAGAIN;
992 FREETMPS;
993 LEAVE;
994 PL_runops = runops_trace;
995 }
996 }
997 }
998 }
999 }
1000
1001 TAINT_NOT;
1002 return 0;
1003}
1004
1005/* inject a fake call to Coro::State::_cctx_init into the execution */
1006/* _cctx_init should be careful, as it could be called at almost any time */
1007/* during execution of a perl program */
1008static void NOINLINE
1009cctx_prepare (pTHX_ coro_cctx *cctx)
1010{
1011 dSP;
1012 LOGOP myop;
1013
1014 PL_top_env = &PL_start_env;
1015
1016 if (cctx->flags & CC_TRACE)
1017 PL_runops = runops_trace;
1018
1019 Zero (&myop, 1, LOGOP);
1020 myop.op_next = PL_op;
1021 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1022
1023 PUSHMARK (SP);
1024 EXTEND (SP, 2);
1025 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
1026 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1027 PUTBACK;
1028 PL_op = (OP *)&myop;
1029 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1030 SPAGAIN;
1031}
1032
1033/*
1034 * this is a _very_ stripped down perl interpreter ;)
1035 */
1036static void
1037cctx_run (void *arg)
1038{
1039 dTHX;
1040
1041 /* cctx_run is the alternative tail of transfer(), so unlock here. */
1042 UNLOCK;
1043
1044 /* we now skip the entersub that lead to transfer() */
1045 PL_op = PL_op->op_next;
1046
1047 /* inject a fake subroutine call to cctx_init */
1048 cctx_prepare (aTHX_ (coro_cctx *)arg);
1049
1050 /* somebody or something will hit me for both perl_run and PL_restartop */
1051 PL_restartop = PL_op;
1052 perl_run (PL_curinterp);
1053
1054 /*
1055 * If perl-run returns we assume exit() was being called or the coro
1056 * fell off the end, which seems to be the only valid (non-bug)
1057 * reason for perl_run to return. We try to exit by jumping to the
1058 * bootstrap-time "top" top_env, as we cannot restore the "main"
1059 * coroutine as Coro has no such concept
1060 */
1061 PL_top_env = main_top_env;
1062 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1063}
1064
1065static coro_cctx *
1066cctx_new ()
1067{
1068 coro_cctx *cctx;
1069 void *stack_start;
1070 size_t stack_size;
1071
1072 ++cctx_count;
1073
1074 Newz (0, cctx, 1, coro_cctx);
1075
1076#if HAVE_MMAP
1077 cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1078 /* mmap supposedly does allocate-on-write for us */
1079 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1080
1081 if (cctx->sptr != (void *)-1)
1082 {
1083# if CORO_STACKGUARD
1084 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1085# endif
1086 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
1087 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1088 cctx->flags |= CC_MAPPED;
1089 }
1090 else
1091#endif
1092 {
1093 cctx->ssize = coro_stacksize * (long)sizeof (long);
1094 New (0, cctx->sptr, coro_stacksize, long);
1095
1096 if (!cctx->sptr)
1097 {
1098 perror ("FATAL: unable to allocate stack for coroutine");
1099 _exit (EXIT_FAILURE);
1100 }
1101
1102 stack_start = cctx->sptr;
1103 stack_size = cctx->ssize;
1104 }
1105
1106 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1107 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1108
1109 return cctx;
1110}
1111
1112static void
1113cctx_destroy (coro_cctx *cctx)
1114{
1115 if (!cctx)
1116 return;
1117
1118 --cctx_count;
1119
1120#if CORO_USE_VALGRIND
1121 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1122#endif
1123
1124#if HAVE_MMAP
1125 if (cctx->flags & CC_MAPPED)
1126 munmap (cctx->sptr, cctx->ssize);
1127 else
1128#endif
1129 Safefree (cctx->sptr);
1130
1131 Safefree (cctx);
1132}
1133
1134/* wether this cctx should be destructed */
1135#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
1136
1137static coro_cctx *
1138cctx_get (pTHX)
1139{
1140 while (expect_true (cctx_first))
1141 {
1142 coro_cctx *cctx = cctx_first;
1143 cctx_first = cctx->next;
1144 --cctx_idle;
1145
1146 if (expect_true (!CCTX_EXPIRED (cctx)))
1147 return cctx;
1148
1149 cctx_destroy (cctx);
1150 }
1151
1152 return cctx_new ();
1153}
1154
1155static void
1156cctx_put (coro_cctx *cctx)
1157{
1158 /* free another cctx if overlimit */
1159 if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
1160 {
1161 coro_cctx *first = cctx_first;
1162 cctx_first = first->next;
1163 --cctx_idle;
1164
1165 cctx_destroy (first);
1166 }
1167
1168 ++cctx_idle;
1169 cctx->next = cctx_first;
1170 cctx_first = cctx;
1171}
1172
1173/** coroutine switching *****************************************************/
1174
1175static void
1176transfer_check (pTHX_ struct coro *prev, struct coro *next)
1177{
1178 if (expect_true (prev != next))
1179 {
1180 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1181 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1182
1183 if (expect_false (next->flags & CF_RUNNING))
1184 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1185
1186 if (expect_false (next->flags & CF_DESTROYED))
1187 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1188
1189#if !PERL_VERSION_ATLEAST (5,10,0)
1190 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1191 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1192#endif
1193 }
1194}
1195
1196/* always use the TRANSFER macro */
1197static void NOINLINE
1198transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1199{
1200 dSTACKLEVEL;
1201 static volatile int has_throw;
1202
1203 /* sometimes transfer is only called to set idle_sp */
1204 if (expect_false (!next))
1205 {
1206 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1207 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1208 }
1209 else if (expect_true (prev != next))
1210 {
1211 coro_cctx *prev__cctx;
1212
1213 if (expect_false (prev->flags & CF_NEW))
1214 {
1215 /* create a new empty context */
1216 Newz (0, prev->cctx, 1, coro_cctx);
1217 prev->flags &= ~CF_NEW;
1218 prev->flags |= CF_RUNNING;
1219 }
1220
1221 prev->flags &= ~CF_RUNNING;
1222 next->flags |= CF_RUNNING;
1223
1224 LOCK;
1225
1226 /* first get rid of the old state */
1227 save_perl (aTHX_ prev);
1228
1229 if (expect_false (next->flags & CF_NEW))
1230 {
1231 /* need to start coroutine */
1232 next->flags &= ~CF_NEW;
1233 /* setup coroutine call */
1234 coro_setup (aTHX_ next);
1235 }
1236 else
1237 load_perl (aTHX_ next);
1238
1239 prev__cctx = prev->cctx;
1240
1241 /* possibly "free" the cctx */
1242 if (expect_true (
1243 prev__cctx->idle_sp == STACKLEVEL
1244 && !(prev__cctx->flags & CC_TRACE)
1245 && !force_cctx
1246 ))
1247 {
1248 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1249 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
1250
1251 prev->cctx = 0;
1252
1253 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1254 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1255 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1256 if (!next->cctx)
1257 next->cctx = cctx_get (aTHX);
1258
1259 cctx_put (prev__cctx);
1260 }
1261
1262 ++next->usecount;
1263
1264 if (expect_true (!next->cctx))
1265 next->cctx = cctx_get (aTHX);
1266
1267 has_throw = !!next->throw;
1268
1269 if (expect_false (prev__cctx != next->cctx))
1270 {
1271 prev__cctx->top_env = PL_top_env;
1272 PL_top_env = next->cctx->top_env;
1273 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1274 }
1275
1276 free_coro_mortal (aTHX);
1277 UNLOCK;
1278
1279 if (expect_false (has_throw))
1280 {
1281 struct coro *coro = SvSTATE (coro_current);
1282
1283 if (coro->throw)
1284 {
1285 SV *exception = coro->throw;
1286 coro->throw = 0;
1287 sv_setsv (ERRSV, exception);
1288 croak (0);
1289 }
1290 }
1291 }
1292}
1293
1294struct transfer_args
1295{
1296 struct coro *prev, *next;
1297};
1298
1299#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1300#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1301
1302/** high level stuff ********************************************************/
1303
1304static int
1305coro_state_destroy (pTHX_ struct coro *coro)
1306{
1307 if (coro->flags & CF_DESTROYED)
1308 return 0;
1309
1310 coro->flags |= CF_DESTROYED;
1311
1312 if (coro->flags & CF_READY)
1313 {
1314 /* reduce nready, as destroying a ready coro effectively unreadies it */
1315 /* alternative: look through all ready queues and remove the coro */
1316 LOCK;
1317 --coro_nready;
1318 UNLOCK;
1319 }
1320 else
1321 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1322
1323 if (coro->mainstack && coro->mainstack != main_mainstack)
1324 {
1325 struct coro temp;
1326
1327 if (coro->flags & CF_RUNNING)
1328 croak ("FATAL: tried to destroy currently running coroutine");
1329
1330 save_perl (aTHX_ &temp);
1331 load_perl (aTHX_ coro);
1332
1333 coro_destroy (aTHX_ coro);
1334
1335 load_perl (aTHX_ &temp);
1336
1337 coro->slot = 0;
1338 }
1339
1340 cctx_destroy (coro->cctx);
1341 SvREFCNT_dec (coro->args);
1342
1343 if (coro->next) coro->next->prev = coro->prev;
1344 if (coro->prev) coro->prev->next = coro->next;
1345 if (coro == coro_first) coro_first = coro->next;
1346
1347 return 1;
1348}
1349
1350static int
1351coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1352{
1353 struct coro *coro = (struct coro *)mg->mg_ptr;
1354 mg->mg_ptr = 0;
1355
1356 coro->hv = 0;
1357
1358 if (--coro->refcnt < 0)
1359 {
1360 coro_state_destroy (aTHX_ coro);
1361 Safefree (coro);
1362 }
1363
1364 return 0;
1365}
1366
1367static int
1368coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1369{
1370 struct coro *coro = (struct coro *)mg->mg_ptr;
1371
1372 ++coro->refcnt;
1373
1374 return 0;
1375}
1376
1377static MGVTBL coro_state_vtbl = {
1378 0, 0, 0, 0,
1379 coro_state_free,
1380 0,
1381#ifdef MGf_DUP
1382 coro_state_dup,
1383#else
1384# define MGf_DUP 0
1385#endif
1386};
1387
1388static void
1389prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1390{
1391 ta->prev = SvSTATE (prev_sv);
1392 ta->next = SvSTATE (next_sv);
1393 TRANSFER_CHECK (*ta);
1394}
1395
1396static void
1397api_transfer (SV *prev_sv, SV *next_sv)
1398{
1399 dTHX;
1400 struct transfer_args ta;
1401
1402 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1403 TRANSFER (ta, 1);
1404}
1405
1406/** Coro ********************************************************************/
1407
1408static void
1409coro_enq (pTHX_ SV *coro_sv)
1410{
1411 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
827} 1412}
828 1413
829static SV * 1414static SV *
830coro_deq (int min_prio) 1415coro_deq (pTHX)
831{ 1416{
832 int prio = PRIO_MAX - PRIO_MIN; 1417 int prio;
833 1418
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; ) 1419 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
839 if (av_len (coro_ready[prio]) >= 0) 1420 if (AvFILLp (coro_ready [prio]) >= 0)
840 {
841 coro_nready--;
842 return av_shift (coro_ready[prio]); 1421 return av_shift (coro_ready [prio]);
843 }
844 1422
845 return 0; 1423 return 0;
846} 1424}
847 1425
1426static int
1427api_ready (SV *coro_sv)
1428{
1429 dTHX;
1430 struct coro *coro;
1431 SV *sv_hook;
1432 void (*xs_hook)(void);
1433
1434 if (SvROK (coro_sv))
1435 coro_sv = SvRV (coro_sv);
1436
1437 coro = SvSTATE (coro_sv);
1438
1439 if (coro->flags & CF_READY)
1440 return 0;
1441
1442 coro->flags |= CF_READY;
1443
1444 LOCK;
1445
1446 sv_hook = coro_nready ? 0 : coro_readyhook;
1447 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1448
1449 coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1450 ++coro_nready;
1451
1452 UNLOCK;
1453
1454 if (sv_hook)
1455 {
1456 dSP;
1457
1458 ENTER;
1459 SAVETMPS;
1460
1461 PUSHMARK (SP);
1462 PUTBACK;
1463 call_sv (sv_hook, G_DISCARD);
1464 SPAGAIN;
1465
1466 FREETMPS;
1467 LEAVE;
1468 }
1469
1470 if (xs_hook)
1471 xs_hook ();
1472
1473 return 1;
1474}
1475
1476static int
1477api_is_ready (SV *coro_sv)
1478{
1479 dTHX;
1480 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1481}
1482
848static void 1483static void
849api_ready (SV *coro) 1484prepare_schedule (pTHX_ struct transfer_args *ta)
850{ 1485{
851 coro_enq (SvREFCNT_inc (coro)); 1486 SV *prev_sv, *next_sv;
1487
1488 for (;;)
1489 {
1490 LOCK;
1491 next_sv = coro_deq (aTHX);
1492
1493 /* nothing to schedule: call the idle handler */
1494 if (expect_false (!next_sv))
1495 {
1496 dSP;
1497 UNLOCK;
1498
1499 ENTER;
1500 SAVETMPS;
1501
1502 PUSHMARK (SP);
1503 PUTBACK;
1504 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1505 SPAGAIN;
1506
1507 FREETMPS;
1508 LEAVE;
1509 continue;
1510 }
1511
1512 ta->next = SvSTATE (next_sv);
1513
1514 /* cannot transfer to destroyed coros, skip and look for next */
1515 if (expect_false (ta->next->flags & CF_DESTROYED))
1516 {
1517 UNLOCK;
1518 SvREFCNT_dec (next_sv);
1519 /* coro_nready is already taken care of by destroy */
1520 continue;
1521 }
1522
1523 --coro_nready;
1524 UNLOCK;
1525 break;
1526 }
1527
1528 /* free this only after the transfer */
1529 prev_sv = SvRV (coro_current);
1530 ta->prev = SvSTATE (prev_sv);
1531 TRANSFER_CHECK (*ta);
1532 assert (ta->next->flags & CF_READY);
1533 ta->next->flags &= ~CF_READY;
1534 SvRV_set (coro_current, next_sv);
1535
1536 LOCK;
1537 free_coro_mortal (aTHX);
1538 coro_mortal = prev_sv;
1539 UNLOCK;
852} 1540}
853 1541
854static void 1542static void
855api_schedule (int cede) 1543prepare_cede (pTHX_ struct transfer_args *ta)
856{ 1544{
857 SV *prev, *next; 1545 api_ready (coro_current);
1546 prepare_schedule (aTHX_ ta);
1547}
858 1548
1549static int
1550prepare_cede_notself (pTHX_ struct transfer_args *ta)
1551{
1552 if (coro_nready)
1553 {
859 prev = GvSV (coro_current); 1554 SV *prev = SvRV (coro_current);
860 1555 prepare_schedule (aTHX_ ta);
861 if (cede) 1556 api_ready (prev);
862 coro_enq (SvREFCNT_inc (prev)); 1557 return 1;
863 1558 }
864 next = coro_deq (PRIO_MIN); 1559 else
865 1560 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} 1561}
877 1562
1563static void
1564api_schedule (void)
1565{
1566 dTHX;
1567 struct transfer_args ta;
1568
1569 prepare_schedule (aTHX_ &ta);
1570 TRANSFER (ta, 1);
1571}
1572
1573static int
1574api_cede (void)
1575{
1576 dTHX;
1577 struct transfer_args ta;
1578
1579 prepare_cede (aTHX_ &ta);
1580
1581 if (expect_true (ta.prev != ta.next))
1582 {
1583 TRANSFER (ta, 1);
1584 return 1;
1585 }
1586 else
1587 return 0;
1588}
1589
1590static int
1591api_cede_notself (void)
1592{
1593 dTHX;
1594 struct transfer_args ta;
1595
1596 if (prepare_cede_notself (aTHX_ &ta))
1597 {
1598 TRANSFER (ta, 1);
1599 return 1;
1600 }
1601 else
1602 return 0;
1603}
1604
1605static void
1606api_trace (SV *coro_sv, int flags)
1607{
1608 dTHX;
1609 struct coro *coro = SvSTATE (coro_sv);
1610
1611 if (flags & CC_TRACE)
1612 {
1613 if (!coro->cctx)
1614 coro->cctx = cctx_new ();
1615 else if (!(coro->cctx->flags & CC_TRACE))
1616 croak ("cannot enable tracing on coroutine with custom stack");
1617
1618 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1619 }
1620 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1621 {
1622 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1623
1624 if (coro->flags & CF_RUNNING)
1625 PL_runops = RUNOPS_DEFAULT;
1626 else
1627 coro->slot->runops = RUNOPS_DEFAULT;
1628 }
1629}
1630
1631static int
1632coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1633{
1634 AV *padlist;
1635 AV *av = (AV *)mg->mg_obj;
1636
1637 abort ();
1638
1639 return 0;
1640}
1641
1642static MGVTBL coro_gensub_vtbl = {
1643 0, 0, 0, 0,
1644 coro_gensub_free
1645};
1646
878MODULE = Coro::State PACKAGE = Coro::State 1647MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
879 1648
880PROTOTYPES: ENABLE 1649PROTOTYPES: DISABLE
881 1650
882BOOT: 1651BOOT:
883{ /* {} necessary for stoopid perl-5.6.x */ 1652{
884 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 1653#ifdef USE_ITHREADS
885 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 1654 MUTEX_INIT (&coro_mutex);
1655#endif
1656 BOOT_PAGESIZE;
1657
1658 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1659 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1660
1661 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1662 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1663 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1664
1665 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1666 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1667 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1668
886 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1669 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
887 1670
888 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1671 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
889 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1672 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
890 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1673 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
891 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1674 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
892
893 if (!padlist_cache)
894 padlist_cache = newHV ();
895 1675
896 main_mainstack = PL_mainstack; 1676 main_mainstack = PL_mainstack;
1677 main_top_env = PL_top_env;
897 1678
1679 while (main_top_env->je_prev)
1680 main_top_env = main_top_env->je_prev;
1681
898 coroapi.ver = CORO_API_VERSION; 1682 coroapi.ver = CORO_API_VERSION;
1683 coroapi.rev = CORO_API_REVISION;
899 coroapi.transfer = api_transfer; 1684 coroapi.transfer = api_transfer;
900}
901 1685
902Coro::State 1686 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
903_newprocess(args) 1687}
904 SV * args 1688
905 PROTOTYPE: $ 1689SV *
1690new (char *klass, ...)
906 CODE: 1691 CODE:
907 Coro__State coro; 1692{
1693 struct coro *coro;
1694 MAGIC *mg;
1695 HV *hv;
1696 int i;
908 1697
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); 1698 Newz (0, coro, 1, struct coro);
1699 coro->args = newAV ();
1700 coro->flags = CF_NEW;
913 1701
914 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1702 if (coro_first) coro_first->prev = coro;
915 coro->mainstack = 0; /* actual work is done inside transfer */ 1703 coro->next = coro_first;
916 coro->stack = 0; 1704 coro_first = coro;
917 1705
918 RETVAL = coro; 1706 coro->hv = hv = newHV ();
1707 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1708 mg->mg_flags |= MGf_DUP;
1709 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1710
1711 av_extend (coro->args, items - 1);
1712 for (i = 1; i < items; i++)
1713 av_push (coro->args, newSVsv (ST (i)));
1714}
919 OUTPUT: 1715 OUTPUT:
920 RETVAL 1716 RETVAL
921 1717
1718# these not obviously related functions are all rolled into the same xs
1719# function to increase chances that they all will call transfer with the same
1720# stack offset
922void 1721void
923transfer(prev, next, flags) 1722_set_stacklevel (...)
924 Coro::State_or_hashref prev 1723 ALIAS:
925 Coro::State_or_hashref next 1724 Coro::State::transfer = 1
926 int flags 1725 Coro::schedule = 2
927 PROTOTYPE: @ 1726 Coro::cede = 3
1727 Coro::cede_notself = 4
928 CODE: 1728 CODE:
1729{
1730 struct transfer_args ta;
1731
929 PUTBACK; 1732 PUTBACK;
930 transfer (aTHX_ prev, next, flags); 1733 switch (ix)
1734 {
1735 case 0:
1736 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1737 ta.next = 0;
1738 break;
1739
1740 case 1:
1741 if (items != 2)
1742 croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1743
1744 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1745 break;
1746
1747 case 2:
1748 prepare_schedule (aTHX_ &ta);
1749 break;
1750
1751 case 3:
1752 prepare_cede (aTHX_ &ta);
1753 break;
1754
1755 case 4:
1756 if (!prepare_cede_notself (aTHX_ &ta))
1757 XSRETURN_EMPTY;
1758
1759 break;
1760 }
931 SPAGAIN; 1761 SPAGAIN;
932 1762
1763 BARRIER;
1764 PUTBACK;
1765 TRANSFER (ta, 0);
1766 SPAGAIN; /* might be the sp of a different coroutine now */
1767 /* be extra careful not to ever do anything after TRANSFER */
1768}
1769
1770bool
1771_destroy (SV *coro_sv)
1772 CODE:
1773 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1774 OUTPUT:
1775 RETVAL
1776
933void 1777void
934DESTROY(coro) 1778_exit (int code)
935 Coro::State coro 1779 PROTOTYPE: $
936 CODE: 1780 CODE:
1781 _exit (code);
937 1782
938 if (coro->mainstack && coro->mainstack != main_mainstack) 1783int
1784cctx_stacksize (int new_stacksize = 0)
1785 CODE:
1786 RETVAL = coro_stacksize;
1787 if (new_stacksize)
1788 coro_stacksize = new_stacksize;
1789 OUTPUT:
1790 RETVAL
1791
1792int
1793cctx_count ()
1794 CODE:
1795 RETVAL = cctx_count;
1796 OUTPUT:
1797 RETVAL
1798
1799int
1800cctx_idle ()
1801 CODE:
1802 RETVAL = cctx_idle;
1803 OUTPUT:
1804 RETVAL
1805
1806void
1807list ()
1808 PPCODE:
1809{
1810 struct coro *coro;
1811 for (coro = coro_first; coro; coro = coro->next)
1812 if (coro->hv)
1813 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1814}
1815
1816void
1817call (Coro::State coro, SV *coderef)
1818 ALIAS:
1819 eval = 1
1820 CODE:
1821{
1822 if (coro->mainstack)
939 { 1823 {
940 struct coro temp; 1824 struct coro temp;
941 1825
1826 if (!(coro->flags & CF_RUNNING))
1827 {
1828 PUTBACK;
1829 save_perl (aTHX_ &temp);
1830 load_perl (aTHX_ coro);
1831 }
1832
1833 {
1834 dSP;
1835 ENTER;
1836 SAVETMPS;
942 PUTBACK; 1837 PUTBACK;
943 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 1838 PUSHSTACK;
944 LOAD(aTHX_ coro); 1839 PUSHMARK (SP);
1840
1841 if (ix)
1842 eval_sv (coderef, 0);
1843 else
1844 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1845
1846 POPSTACK;
945 SPAGAIN; 1847 SPAGAIN;
1848 FREETMPS;
1849 LEAVE;
1850 PUTBACK;
1851 }
946 1852
947 destroy_stacks (aTHX); 1853 if (!(coro->flags & CF_RUNNING))
948 1854 {
949 LOAD((&temp)); /* this will get rid of defsv etc.. */ 1855 save_perl (aTHX_ coro);
1856 load_perl (aTHX_ &temp);
950 SPAGAIN; 1857 SPAGAIN;
951 1858 }
952 coro->mainstack = 0;
953 } 1859 }
1860}
954 1861
955 deallocate_stack (coro); 1862SV *
956 1863is_ready (Coro::State coro)
957 Safefree (coro); 1864 PROTOTYPE: $
1865 ALIAS:
1866 is_ready = CF_READY
1867 is_running = CF_RUNNING
1868 is_new = CF_NEW
1869 is_destroyed = CF_DESTROYED
1870 CODE:
1871 RETVAL = boolSV (coro->flags & ix);
1872 OUTPUT:
1873 RETVAL
958 1874
959void 1875void
960flush() 1876api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
961 CODE:
962#ifdef MAY_FLUSH
963 flush_padlist_cache ();
964#endif
965 1877
966void 1878SV *
967_exit(code) 1879has_cctx (Coro::State coro)
968 int code
969 PROTOTYPE: $ 1880 PROTOTYPE: $
970 CODE: 1881 CODE:
971#if defined(__GLIBC__) || _POSIX_C_SOURCE 1882 RETVAL = boolSV (!!coro->cctx);
972 _exit (code); 1883 OUTPUT:
973#else 1884 RETVAL
974 signal (SIGTERM, SIG_DFL);
975 raise (SIGTERM);
976 exit (code);
977#endif
978 1885
979MODULE = Coro::State PACKAGE = Coro::Cont 1886int
1887is_traced (Coro::State coro)
1888 PROTOTYPE: $
1889 CODE:
1890 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
1891 OUTPUT:
1892 RETVAL
980 1893
981# this is slightly dirty (should expose a c-level api) 1894IV
1895rss (Coro::State coro)
1896 PROTOTYPE: $
1897 ALIAS:
1898 usecount = 1
1899 CODE:
1900 switch (ix)
1901 {
1902 case 0: RETVAL = coro_rss (aTHX_ coro); break;
1903 case 1: RETVAL = coro->usecount; break;
1904 }
1905 OUTPUT:
1906 RETVAL
982 1907
983void 1908void
984yield(...) 1909force_cctx ()
1910 CODE:
1911 struct coro *coro = SvSTATE (coro_current);
1912 coro->cctx->idle_sp = 0;
1913
1914void
1915throw (Coro::State self, SV *throw = &PL_sv_undef)
985 PROTOTYPE: @ 1916 PROTOTYPE: $;$
986 CODE: 1917 CODE:
987 static SV *returnstk;
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); 1918 SvREFCNT_dec (self->throw);
1919 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1006 1920
1007 transfer(aTHX_ prev, next, 0); 1921void
1922swap_defsv (Coro::State self)
1923 PROTOTYPE: $
1924 ALIAS:
1925 swap_defav = 1
1926 CODE:
1927 if (!self->slot)
1928 croak ("cannot swap state with coroutine that has no saved state");
1929 else
1930 {
1931 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
1932 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
1933
1934 SV *tmp = *src; *src = *dst; *dst = tmp;
1935 }
1008 1936
1009MODULE = Coro::State PACKAGE = Coro 1937MODULE = Coro::State PACKAGE = Coro
1010 1938
1011# this is slightly dirty (should expose a c-level api)
1012
1013BOOT: 1939BOOT:
1014{ 1940{
1015 int i; 1941 int i;
1942
1943 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
1944 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1945 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
1946
1947 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
1948 SvREADONLY_on (coro_current);
1949
1016 HV *stash = gv_stashpv ("Coro", TRUE); 1950 coro_stash = gv_stashpv ("Coro", TRUE);
1017 1951
1018 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 1952 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1019 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 1953 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1020 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 1954 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1021 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 1955 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1022 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 1956 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1023 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 1957 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 1958
1028 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 1959 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1029 coro_ready[i] = newAV (); 1960 coro_ready[i] = newAV ();
1030 1961
1031 { 1962 {
1032 SV *sv = perl_get_sv("Coro::API", 1); 1963 SV *sv = perl_get_sv ("Coro::API", TRUE);
1964 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1033 1965
1034 coroapi.schedule = api_schedule; 1966 coroapi.schedule = api_schedule;
1967 coroapi.cede = api_cede;
1968 coroapi.cede_notself = api_cede_notself;
1035 coroapi.ready = api_ready; 1969 coroapi.ready = api_ready;
1970 coroapi.is_ready = api_is_ready;
1036 coroapi.nready = &coro_nready; 1971 coroapi.nready = &coro_nready;
1037 coroapi.current = coro_current; 1972 coroapi.current = coro_current;
1038 1973
1039 GCoroAPI = &coroapi; 1974 GCoroAPI = &coroapi;
1040 sv_setiv(sv, (IV)&coroapi); 1975 sv_setiv (sv, (IV)&coroapi);
1041 SvREADONLY_on(sv); 1976 SvREADONLY_on (sv);
1042 } 1977 }
1043} 1978}
1044 1979
1045void 1980void
1046ready(self) 1981_set_current (SV *current)
1047 SV * self
1048 PROTOTYPE: $ 1982 PROTOTYPE: $
1049 CODE: 1983 CODE:
1050 api_ready (self); 1984 SvREFCNT_dec (SvRV (coro_current));
1985 SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1986
1987void
1988_set_readyhook (SV *hook)
1989 PROTOTYPE: $
1990 CODE:
1991 LOCK;
1992 SvREFCNT_dec (coro_readyhook);
1993 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
1994 UNLOCK;
1051 1995
1052int 1996int
1997prio (Coro::State coro, int newprio = 0)
1998 ALIAS:
1999 nice = 1
2000 CODE:
2001{
2002 RETVAL = coro->prio;
2003
2004 if (items > 1)
2005 {
2006 if (ix)
2007 newprio = coro->prio - newprio;
2008
2009 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2010 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2011
2012 coro->prio = newprio;
2013 }
2014}
2015 OUTPUT:
2016 RETVAL
2017
2018SV *
2019ready (SV *self)
2020 PROTOTYPE: $
2021 CODE:
2022 RETVAL = boolSV (api_ready (self));
2023 OUTPUT:
2024 RETVAL
2025
2026int
1053nready(...) 2027nready (...)
1054 PROTOTYPE: 2028 PROTOTYPE:
1055 CODE: 2029 CODE:
1056 RETVAL = coro_nready; 2030 RETVAL = coro_nready;
1057 OUTPUT: 2031 OUTPUT:
1058 RETVAL 2032 RETVAL
1059 2033
2034# for async_pool speedup
1060void 2035void
1061schedule(...) 2036_pool_1 (SV *cb)
1062 PROTOTYPE:
1063 ALIAS:
1064 cede = 1
1065 CODE: 2037 CODE:
1066 api_schedule (ix); 2038{
2039 struct coro *coro = SvSTATE (coro_current);
2040 HV *hv = (HV *)SvRV (coro_current);
2041 AV *defav = GvAV (PL_defgv);
2042 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2043 AV *invoke_av;
2044 int i, len;
1067 2045
2046 if (!invoke)
2047 {
2048 SV *old = PL_diehook;
2049 PL_diehook = 0;
2050 SvREFCNT_dec (old);
2051 croak ("\3async_pool terminate\2\n");
2052 }
2053
2054 SvREFCNT_dec (coro->saved_deffh);
2055 coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
2056
2057 hv_store (hv, "desc", sizeof ("desc") - 1,
2058 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2059
2060 invoke_av = (AV *)SvRV (invoke);
2061 len = av_len (invoke_av);
2062
2063 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2064
2065 if (len > 0)
2066 {
2067 av_fill (defav, len - 1);
2068 for (i = 0; i < len; ++i)
2069 av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
2070 }
2071
2072 SvREFCNT_dec (invoke);
2073}
2074
2075void
2076_pool_2 (SV *cb)
2077 CODE:
2078{
2079 struct coro *coro = SvSTATE (coro_current);
2080
2081 sv_setsv (cb, &PL_sv_undef);
2082
2083 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2084 coro->saved_deffh = 0;
2085
2086 if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
2087 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2088 {
2089 SV *old = PL_diehook;
2090 PL_diehook = 0;
2091 SvREFCNT_dec (old);
2092 croak ("\3async_pool terminate\2\n");
2093 }
2094
2095 av_clear (GvAV (PL_defgv));
2096 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2097 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2098
2099 coro->prio = 0;
2100
2101 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2102 api_trace (coro_current, 0);
2103
2104 av_push (av_async_pool, newSVsv (coro_current));
2105}
2106
2107#if 0
2108
2109void
2110_generator_call (...)
2111 PROTOTYPE: @
2112 PPCODE:
2113 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2114 xxxx
2115 abort ();
2116
2117SV *
2118gensub (SV *sub, ...)
2119 PROTOTYPE: &;@
2120 CODE:
2121{
2122 struct coro *coro;
2123 MAGIC *mg;
2124 CV *xcv;
2125 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2126 int i;
2127
2128 CvGV (ncv) = CvGV (cv);
2129 CvFILE (ncv) = CvFILE (cv);
2130
2131 Newz (0, coro, 1, struct coro);
2132 coro->args = newAV ();
2133 coro->flags = CF_NEW;
2134
2135 av_extend (coro->args, items - 1);
2136 for (i = 1; i < items; i++)
2137 av_push (coro->args, newSVsv (ST (i)));
2138
2139 CvISXSUB_on (ncv);
2140 CvXSUBANY (ncv).any_ptr = (void *)coro;
2141
2142 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2143
2144 CvXSUB (ncv) = CvXSUB (xcv);
2145 CvANON_on (ncv);
2146
2147 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2148 RETVAL = newRV_noinc ((SV *)ncv);
2149}
2150 OUTPUT:
2151 RETVAL
2152
2153#endif
2154
2155
2156MODULE = Coro::State PACKAGE = Coro::AIO
2157
2158SV *
2159_get_state ()
2160 CODE:
2161{
2162 struct io_state *data;
2163
2164 RETVAL = newSV (sizeof (struct io_state));
2165 data = (struct io_state *)SvPVX (RETVAL);
2166 SvCUR_set (RETVAL, sizeof (struct io_state));
2167 SvPOK_only (RETVAL);
2168
2169 data->errorno = errno;
2170 data->laststype = PL_laststype;
2171 data->laststatval = PL_laststatval;
2172 data->statcache = PL_statcache;
2173}
2174 OUTPUT:
2175 RETVAL
2176
2177void
2178_set_state (char *data_)
2179 PROTOTYPE: $
2180 CODE:
2181{
2182 struct io_state *data = (void *)data_;
2183
2184 errno = data->errorno;
2185 PL_laststype = data->laststype;
2186 PL_laststatval = data->laststatval;
2187 PL_statcache = data->statcache;
2188}
2189
2190
2191MODULE = Coro::State PACKAGE = Coro::AnyEvent
2192
2193BOOT:
2194 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2195
2196SV *
2197_schedule (...)
2198 PROTOTYPE: @
2199 CODE:
2200{
2201 static int incede;
2202
2203 api_cede_notself ();
2204
2205 ++incede;
2206 while (coro_nready >= incede && api_cede ())
2207 ;
2208
2209 sv_setsv (sv_activity, &PL_sv_undef);
2210 if (coro_nready >= incede)
2211 {
2212 PUSHMARK (SP);
2213 PUTBACK;
2214 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2215 SPAGAIN;
2216 }
2217
2218 --incede;
2219}
2220

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