ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/Coro/Coro/State.xs
(Generate patch)

Comparing Coro/Coro/State.xs (file contents):
Revision 1.31 by root, Sun Aug 26 16:36:08 2001 UTC vs.
Revision 1.259 by root, Mon Nov 10 00:02:29 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"
9#include "perliol.h"
4 10
5#include "libcoro/coro.c" 11#include "patchlevel.h"
6 12
7#include <signal.h> 13#include <stdio.h>
14#include <errno.h>
15#include <assert.h>
16
17#ifdef WIN32
18# undef setjmp
19# undef longjmp
20# undef _exit
21# define setjmp _setjmp // deep magic, don't ask
22#else
23# include <inttypes.h> /* most portable stdint.h */
24#endif
8 25
9#ifdef HAVE_MMAP 26#ifdef HAVE_MMAP
10# include <unistd.h> 27# include <unistd.h>
11# include <sys/mman.h> 28# include <sys/mman.h>
12# ifndef MAP_ANON
13# ifdef MAP_ANONYMOUS 29# ifndef MAP_ANONYMOUS
14# define MAP_ANON MAP_ANONYMOUS 30# ifdef MAP_ANON
31# define MAP_ANONYMOUS MAP_ANON
15# else 32# else
16# undef HAVE_MMAP 33# undef HAVE_MMAP
17# endif 34# endif
18# endif 35# endif
36# include <limits.h>
37# ifndef PAGESIZE
38# define PAGESIZE pagesize
39# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
40static long pagesize;
41# else
42# define BOOT_PAGESIZE (void)0
19#endif 43# endif
44#else
45# define PAGESIZE 0
46# define BOOT_PAGESIZE (void)0
47#endif
20 48
21#define MAY_FLUSH /* increases codesize and is rarely used */ 49#if CORO_USE_VALGRIND
50# include <valgrind/valgrind.h>
51# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
52#else
53# define REGISTER_STACK(cctx,start,end)
54#endif
22 55
23#define SUB_INIT "Coro::State::initialize" 56/* the maximum number of idle cctx that will be pooled */
24#define UCORO_STATE "_coro_state" 57static int cctx_max_idle = 4;
25 58
26/* The next macro should declare a variable stacklevel that contains and approximation 59#define PERL_VERSION_ATLEAST(a,b,c) \
27 * to the current C stack pointer. Its property is that it changes with each call 60 (PERL_REVISION > (a) \
28 * and should be unique. */ 61 || (PERL_REVISION == (a) \
62 && (PERL_VERSION > (b) \
63 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
64
65#if !PERL_VERSION_ATLEAST (5,6,0)
66# ifndef PL_ppaddr
67# define PL_ppaddr ppaddr
68# endif
69# ifndef call_sv
70# define call_sv perl_call_sv
71# endif
72# ifndef get_sv
73# define get_sv perl_get_sv
74# endif
75# ifndef get_cv
76# define get_cv perl_get_cv
77# endif
78# ifndef IS_PADGV
79# define IS_PADGV(v) 0
80# endif
81# ifndef IS_PADCONST
82# define IS_PADCONST(v) 0
83# endif
84#endif
85
86/* 5.11 */
87#ifndef CxHASARGS
88# define CxHASARGS(cx) (cx)->blk_sub.hasargs
89#endif
90
91/* 5.10.0 */
92#ifndef SvREFCNT_inc_NN
93# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
94#endif
95
96/* 5.8.8 */
97#ifndef GV_NOTQUAL
98# define GV_NOTQUAL 0
99#endif
100#ifndef newSV
101# define newSV(l) NEWSV(0,l)
102#endif
103
104/* 5.8.7 */
105#ifndef SvRV_set
106# define SvRV_set(s,v) SvRV(s) = (v)
107#endif
108
109#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
110# undef CORO_STACKGUARD
111#endif
112
113#ifndef CORO_STACKGUARD
114# define CORO_STACKGUARD 0
115#endif
116
117/* prefer perl internal functions over our own? */
118#ifndef CORO_PREFER_PERL_FUNCTIONS
119# define CORO_PREFER_PERL_FUNCTIONS 0
120#endif
121
122/* The next macros try to return the current stack pointer, in an as
123 * portable way as possible. */
124#define dSTACKLEVEL volatile char stacklevel
29#define dSTACKLEVEL void *stacklevel = &stacklevel 125#define STACKLEVEL ((void *)&stacklevel)
30 126
31#define labs(l) ((l) >= 0 ? (l) : -(l)) 127#define IN_DESTRUCT (PL_main_cv == Nullcv)
128
129#if __GNUC__ >= 3
130# define attribute(x) __attribute__(x)
131# define BARRIER __asm__ __volatile__ ("" : : : "memory")
132# define expect(expr,value) __builtin_expect ((expr),(value))
133#else
134# define attribute(x)
135# define BARRIER
136# define expect(expr,value) (expr)
137#endif
138
139#define expect_false(expr) expect ((expr) != 0, 0)
140#define expect_true(expr) expect ((expr) != 0, 1)
141
142#define NOINLINE attribute ((noinline))
32 143
33#include "CoroAPI.h" 144#include "CoroAPI.h"
34 145
146#ifdef USE_ITHREADS
147
148static perl_mutex coro_lock;
149# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
150# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
151# if CORO_PTHREAD
152static void *coro_thx;
153# endif
154
155#else
156
157# define LOCK (void)0
158# define UNLOCK (void)0
159
160#endif
161
162# undef LOCK
163# define LOCK (void)0
164# undef UNLOCK
165# define UNLOCK (void)0
166
167/* helper storage struct for Coro::AIO */
168struct io_state
169{
170 AV *res;
171 int errorno;
172 I32 laststype; /* U16 in 5.10.0 */
173 int laststatval;
174 Stat_t statcache;
175};
176
177static double (*nvtime)(); /* so why doesn't it take void? */
178
179static U32 cctx_gen;
180static size_t cctx_stacksize = CORO_STACKSIZE;
35static struct CoroAPI coroapi; 181static struct CoroAPI coroapi;
182static AV *main_mainstack; /* used to differentiate between $main and others */
183static JMPENV *main_top_env;
184static HV *coro_state_stash, *coro_stash;
185static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
186static volatile char next_has_throw; /* speedup flag for next->throw check */
36 187
37/* this is actually not only the c stack but also c registers etc... */ 188static GV *irsgv; /* $/ */
189static GV *stdoutgv; /* *STDOUT */
190static SV *rv_diehook;
191static SV *rv_warnhook;
192static HV *hv_sig; /* %SIG */
193
194/* async_pool helper stuff */
195static SV *sv_pool_rss;
196static SV *sv_pool_size;
197static AV *av_async_pool;
198
199/* Coro::AnyEvent */
200static SV *sv_activity;
201
202static struct coro_cctx *cctx_first;
203static int cctx_count, cctx_idle;
204
205enum {
206 CC_MAPPED = 0x01,
207 CC_NOREUSE = 0x02, /* throw this away after tracing */
208 CC_TRACE = 0x04,
209 CC_TRACE_SUB = 0x08, /* trace sub calls */
210 CC_TRACE_LINE = 0x10, /* trace each statement */
211 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
212};
213
214/* this is a structure representing a c-level coroutine */
215typedef struct coro_cctx {
216 struct coro_cctx *next;
217
218 /* the stack */
219 void *sptr;
220 size_t ssize;
221
222 /* cpu state */
223 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
224 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
225 JMPENV *top_env;
226 coro_context cctx;
227
228 U32 gen;
229#if CORO_USE_VALGRIND
230 int valgrind_id;
231#endif
232 unsigned char flags;
233} coro_cctx;
234
235enum {
236 CF_RUNNING = 0x0001, /* coroutine is running */
237 CF_READY = 0x0002, /* coroutine is ready */
238 CF_NEW = 0x0004, /* has never been switched to */
239 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
240};
241
242/* the structure where most of the perl state is stored, overlaid on the cxstack */
38typedef struct { 243typedef struct {
39 int refcnt; /* pointer reference counter */ 244 SV *defsv;
40 int usecnt; /* shared by how many coroutines */ 245 AV *defav;
41 int gencnt; /* generation counter */ 246 SV *errsv;
247 SV *irsgv;
248#define VAR(name,type) type name;
249# include "state.h"
250#undef VAR
251} perl_slots;
42 252
43 coro_context cctx; 253#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
44 254
45 void *sptr; 255/* this is a structure representing a perl-level coroutine */
46 long ssize; /* positive == mmap, otherwise malloc */
47} coro_stack;
48
49struct coro { 256struct coro {
50 /* the optional C context */ 257 /* the c coroutine allocated to this perl coroutine, if any */
51 coro_stack *stack; 258 coro_cctx *cctx;
52 void *cursp;
53 int gencnt;
54 259
55 /* optionally saved, might be zero */ 260 /* process data */
56 AV *defav;
57 SV *defsv;
58 SV *errsv;
59
60 /* saved global state not related to stacks */
61 U8 dowarn;
62 I32 in_eval;
63
64 /* the stacks and related info (callchain etc..) */
65 PERL_SI *curstackinfo;
66 AV *curstack;
67 AV *mainstack; 261 AV *mainstack;
68 SV **stack_sp; 262 perl_slots *slot; /* basically the saved sp */
69 OP *op;
70 SV **curpad;
71 SV **stack_base;
72 SV **stack_max;
73 SV **tmps_stack;
74 I32 tmps_floor;
75 I32 tmps_ix;
76 I32 tmps_max;
77 I32 *markstack;
78 I32 *markstack_ptr;
79 I32 *markstack_max;
80 I32 *scopestack;
81 I32 scopestack_ix;
82 I32 scopestack_max;
83 ANY *savestack;
84 I32 savestack_ix;
85 I32 savestack_max;
86 OP **retstack;
87 I32 retstack_ix;
88 I32 retstack_max;
89 COP *curcop;
90 JMPENV *top_env;
91 263
92 /* data associated with this coroutine (initial args) */ 264 AV *args; /* data associated with this coroutine (initial args) */
93 AV *args; 265 int refcnt; /* coroutines are refcounted, yes */
266 int flags; /* CF_ flags */
267 HV *hv; /* the perl hash associated with this coro, if any */
268
269 /* statistics */
270 int usecount; /* number of transfers to this coro */
271
272 /* coro process data */
273 int prio;
274 SV *throw; /* exception to be thrown */
275
276 /* async_pool */
277 SV *saved_deffh;
278
279 /* linked list */
280 struct coro *next, *prev;
94}; 281};
95 282
96typedef struct coro *Coro__State; 283typedef struct coro *Coro__State;
97typedef struct coro *Coro__State_or_hashref; 284typedef struct coro *Coro__State_or_hashref;
98
99static AV *main_mainstack; /* used to differentiate between $main and others */
100static HV *coro_state_stash;
101static SV *ucoro_state_sv;
102static U32 ucoro_state_hash;
103static HV *padlist_cache;
104
105/* mostly copied from op.c:cv_clone2 */
106STATIC AV *
107clone_padlist (AV *protopadlist)
108{
109 AV *av;
110 I32 ix;
111 AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
112 AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
113 SV **pname = AvARRAY (protopad_name);
114 SV **ppad = AvARRAY (protopad);
115 I32 fname = AvFILLp (protopad_name);
116 I32 fpad = AvFILLp (protopad);
117 AV *newpadlist, *newpad_name, *newpad;
118 SV **npad;
119
120 newpad_name = newAV ();
121 for (ix = fname; ix >= 0; ix--)
122 av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
123
124 newpad = newAV ();
125 av_fill (newpad, AvFILLp (protopad));
126 npad = AvARRAY (newpad);
127
128 newpadlist = newAV ();
129 AvREAL_off (newpadlist);
130 av_store (newpadlist, 0, (SV *) newpad_name);
131 av_store (newpadlist, 1, (SV *) newpad);
132
133 av = newAV (); /* will be @_ */
134 av_extend (av, 0);
135 av_store (newpad, 0, (SV *) av);
136 AvFLAGS (av) = AVf_REIFY;
137
138 for (ix = fpad; ix > 0; ix--)
139 {
140 SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
141 if (namesv && namesv != &PL_sv_undef)
142 {
143 char *name = SvPVX (namesv); /* XXX */
144 if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
145 { /* lexical from outside? */
146 npad[ix] = SvREFCNT_inc (ppad[ix]);
147 }
148 else
149 { /* our own lexical */
150 SV *sv;
151 if (*name == '&')
152 sv = SvREFCNT_inc (ppad[ix]);
153 else if (*name == '@')
154 sv = (SV *) newAV ();
155 else if (*name == '%')
156 sv = (SV *) newHV ();
157 else
158 sv = NEWSV (0, 0);
159 if (!SvPADBUSY (sv))
160 SvPADMY_on (sv);
161 npad[ix] = sv;
162 }
163 }
164 else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
165 {
166 npad[ix] = SvREFCNT_inc (ppad[ix]);
167 }
168 else
169 {
170 SV *sv = NEWSV (0, 0);
171 SvPADTMP_on (sv);
172 npad[ix] = sv;
173 }
174 }
175
176#if 0 /* return -ENOTUNDERSTOOD */
177 /* Now that vars are all in place, clone nested closures. */
178
179 for (ix = fpad; ix > 0; ix--) {
180 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
181 if (namesv
182 && namesv != &PL_sv_undef
183 && !(SvFLAGS(namesv) & SVf_FAKE)
184 && *SvPVX(namesv) == '&'
185 && CvCLONE(ppad[ix]))
186 {
187 CV *kid = cv_clone((CV*)ppad[ix]);
188 SvREFCNT_dec(ppad[ix]);
189 CvCLONE_on(kid);
190 SvPADMY_on(kid);
191 npad[ix] = (SV*)kid;
192 }
193 }
194#endif
195
196 return newpadlist;
197}
198
199#ifdef MAY_FLUSH
200STATIC void
201free_padlist (AV *padlist)
202{
203 /* may be during global destruction */
204 if (SvREFCNT(padlist))
205 {
206 I32 i = AvFILLp(padlist);
207 while (i >= 0)
208 {
209 SV **svp = av_fetch(padlist, i--, FALSE);
210 SV *sv = svp ? *svp : Nullsv;
211 if (sv)
212 SvREFCNT_dec(sv);
213 }
214
215 SvREFCNT_dec((SV*)padlist);
216 }
217}
218#endif
219
220/* the next two functions merely cache the padlists */
221STATIC void
222get_padlist (CV *cv)
223{
224 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
225
226 if (he && AvFILLp ((AV *)*he) >= 0)
227 CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
228 else
229 CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
230}
231
232STATIC void
233put_padlist (CV *cv)
234{
235 SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
236
237 if (SvTYPE (*he) != SVt_PVAV)
238 {
239 SvREFCNT_dec (*he);
240 *he = (SV *)newAV ();
241 }
242
243 av_push ((AV *)*he, (SV *)CvPADLIST (cv));
244}
245
246#ifdef MAY_FLUSH
247STATIC void
248flush_padlist_cache ()
249{
250 HV *hv = padlist_cache;
251 padlist_cache = newHV ();
252
253 if (hv_iterinit (hv))
254 {
255 HE *he;
256 AV *padlist;
257
258 while (!!(he = hv_iternext (hv)))
259 {
260 AV *av = (AV *)HeVAL(he);
261
262 /* casting is fun. */
263 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
264 free_padlist (padlist);
265 }
266 }
267
268 SvREFCNT_dec (hv);
269}
270#endif
271
272#define SB do {
273#define SE } while (0)
274
275#define LOAD(state) load_state(aTHX_ (state));
276#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
277
278#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
279
280static void
281load_state(pTHX_ Coro__State c)
282{
283 PL_dowarn = c->dowarn;
284 PL_in_eval = c->in_eval;
285
286 PL_curstackinfo = c->curstackinfo;
287 PL_curstack = c->curstack;
288 PL_mainstack = c->mainstack;
289 PL_stack_sp = c->stack_sp;
290 PL_op = c->op;
291 PL_curpad = c->curpad;
292 PL_stack_base = c->stack_base;
293 PL_stack_max = c->stack_max;
294 PL_tmps_stack = c->tmps_stack;
295 PL_tmps_floor = c->tmps_floor;
296 PL_tmps_ix = c->tmps_ix;
297 PL_tmps_max = c->tmps_max;
298 PL_markstack = c->markstack;
299 PL_markstack_ptr = c->markstack_ptr;
300 PL_markstack_max = c->markstack_max;
301 PL_scopestack = c->scopestack;
302 PL_scopestack_ix = c->scopestack_ix;
303 PL_scopestack_max = c->scopestack_max;
304 PL_savestack = c->savestack;
305 PL_savestack_ix = c->savestack_ix;
306 PL_savestack_max = c->savestack_max;
307 PL_retstack = c->retstack;
308 PL_retstack_ix = c->retstack_ix;
309 PL_retstack_max = c->retstack_max;
310 PL_curcop = c->curcop;
311 PL_top_env = c->top_env;
312
313 if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
314 if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
315 if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
316
317 {
318 dSP;
319 CV *cv;
320
321 /* now do the ugly restore mess */
322 while ((cv = (CV *)POPs))
323 {
324 AV *padlist = (AV *)POPs;
325
326 if (padlist)
327 {
328 put_padlist (cv); /* mark this padlist as available */
329 CvPADLIST(cv) = padlist;
330#ifdef USE_THREADS
331 /*CvOWNER(cv) = (struct perl_thread *)POPs;*/
332#endif
333 }
334
335 ++CvDEPTH(cv);
336 }
337
338 PUTBACK;
339 }
340}
341
342static void
343save_state(pTHX_ Coro__State c, int flags)
344{
345 {
346 dSP;
347 I32 cxix = cxstack_ix;
348 PERL_CONTEXT *ccstk = cxstack;
349 PERL_SI *top_si = PL_curstackinfo;
350
351 /*
352 * the worst thing you can imagine happens first - we have to save
353 * (and reinitialize) all cv's in the whole callchain :(
354 */
355
356 PUSHs (Nullsv);
357 /* this loop was inspired by pp_caller */
358 for (;;)
359 {
360 while (cxix >= 0)
361 {
362 PERL_CONTEXT *cx = &ccstk[cxix--];
363
364 if (CxTYPE(cx) == CXt_SUB)
365 {
366 CV *cv = cx->blk_sub.cv;
367 if (CvDEPTH(cv))
368 {
369#ifdef USE_THREADS
370 /*XPUSHs ((SV *)CvOWNER(cv));*/
371 /*CvOWNER(cv) = 0;*/
372 /*error must unlock this cv etc.. etc...*/
373#endif
374 EXTEND (SP, CvDEPTH(cv)*2);
375
376 while (--CvDEPTH(cv))
377 {
378 /* this tells the restore code to increment CvDEPTH */
379 PUSHs (Nullsv);
380 PUSHs ((SV *)cv);
381 }
382
383 PUSHs ((SV *)CvPADLIST(cv));
384 PUSHs ((SV *)cv);
385
386 get_padlist (cv); /* this is a monster */
387 }
388 }
389 else if (CxTYPE(cx) == CXt_FORMAT)
390 {
391 /* I never used formats, so how should I know how these are implemented? */
392 /* my bold guess is as a simple, plain sub... */
393 croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
394 }
395 }
396
397 if (top_si->si_type == PERLSI_MAIN)
398 break;
399
400 top_si = top_si->si_prev;
401 ccstk = top_si->si_cxstack;
402 cxix = top_si->si_cxix;
403 }
404
405 PUTBACK;
406 }
407
408 c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
409 c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
410 c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
411
412 c->dowarn = PL_dowarn;
413 c->in_eval = PL_in_eval;
414
415 c->curstackinfo = PL_curstackinfo;
416 c->curstack = PL_curstack;
417 c->mainstack = PL_mainstack;
418 c->stack_sp = PL_stack_sp;
419 c->op = PL_op;
420 c->curpad = PL_curpad;
421 c->stack_base = PL_stack_base;
422 c->stack_max = PL_stack_max;
423 c->tmps_stack = PL_tmps_stack;
424 c->tmps_floor = PL_tmps_floor;
425 c->tmps_ix = PL_tmps_ix;
426 c->tmps_max = PL_tmps_max;
427 c->markstack = PL_markstack;
428 c->markstack_ptr = PL_markstack_ptr;
429 c->markstack_max = PL_markstack_max;
430 c->scopestack = PL_scopestack;
431 c->scopestack_ix = PL_scopestack_ix;
432 c->scopestack_max = PL_scopestack_max;
433 c->savestack = PL_savestack;
434 c->savestack_ix = PL_savestack_ix;
435 c->savestack_max = PL_savestack_max;
436 c->retstack = PL_retstack;
437 c->retstack_ix = PL_retstack_ix;
438 c->retstack_max = PL_retstack_max;
439 c->curcop = PL_curcop;
440 c->top_env = PL_top_env;
441}
442
443/*
444 * allocate various perl stacks. This is an exact copy
445 * of perl.c:init_stacks, except that it uses less memory
446 * on the assumption that coroutines do not usually need
447 * a lot of stackspace.
448 */
449STATIC void
450coro_init_stacks (pTHX)
451{
452 PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
453 PL_curstackinfo->si_type = PERLSI_MAIN;
454 PL_curstack = PL_curstackinfo->si_stack;
455 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
456
457 PL_stack_base = AvARRAY(PL_curstack);
458 PL_stack_sp = PL_stack_base;
459 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
460
461 New(50,PL_tmps_stack,96,SV*);
462 PL_tmps_floor = -1;
463 PL_tmps_ix = -1;
464 PL_tmps_max = 96;
465
466 New(54,PL_markstack,16,I32);
467 PL_markstack_ptr = PL_markstack;
468 PL_markstack_max = PL_markstack + 16;
469
470 SET_MARK_OFFSET;
471
472 New(54,PL_scopestack,16,I32);
473 PL_scopestack_ix = 0;
474 PL_scopestack_max = 16;
475
476 New(54,PL_savestack,96,ANY);
477 PL_savestack_ix = 0;
478 PL_savestack_max = 96;
479
480 New(54,PL_retstack,8,OP*);
481 PL_retstack_ix = 0;
482 PL_retstack_max = 8;
483}
484
485/*
486 * destroy the stacks, the callchain etc...
487 * still there is a memleak of 128 bytes...
488 */
489STATIC void
490destroy_stacks(pTHX)
491{
492 int destruct = PL_main_cv != Nullcv;
493
494 if (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 (destruct)
519 {
520 dounwind(-1);
521 SvREFCNT_dec(PL_curstackinfo->si_stack);
522 }
523
524 Safefree(PL_curstackinfo->si_cxstack);
525 Safefree(PL_curstackinfo);
526 PL_curstackinfo = p;
527 }
528
529 Safefree(PL_tmps_stack);
530 Safefree(PL_markstack);
531 Safefree(PL_scopestack);
532 Safefree(PL_savestack);
533 Safefree(PL_retstack);
534}
535
536static void
537allocate_stack (Coro__State ctx, int alloc)
538{
539 coro_stack *stack;
540
541 New (0, stack, 1, coro_stack);
542
543 stack->refcnt = 1;
544 stack->usecnt = 1;
545 stack->gencnt = ctx->gencnt = 0;
546 if (alloc)
547 {
548#ifdef HAVE_MMAP
549 stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
550 stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
551 if (stack->sptr == (void *)-1)
552#endif
553 {
554 /*FIXME*//*D*//* reasonable stack size! */
555 stack->ssize = -4096 * sizeof (long);
556 New (0, stack->sptr, 4096, long);
557 }
558 }
559 else
560 stack->sptr = 0;
561
562 ctx->stack = stack;
563}
564
565static void
566deallocate_stack (Coro__State ctx)
567{
568 coro_stack *stack = ctx->stack;
569
570 ctx->stack = 0;
571
572 if (stack)
573 {
574 if (!--stack->refcnt)
575 {
576#ifdef HAVE_MMAP
577 if (stack->ssize > 0 && stack->sptr)
578 munmap (stack->sptr, stack->ssize);
579 else
580#else
581 Safefree (stack->sptr);
582#endif
583 Safefree (stack);
584 }
585 else if (ctx->gencnt == stack->gencnt)
586 --stack->usecnt;
587 }
588}
589
590static void
591setup_coro (void *arg)
592{
593 /*
594 * emulate part of the perl startup here.
595 */
596 dSP;
597 Coro__State ctx = (Coro__State)arg;
598 SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
599
600 coro_init_stacks (aTHX);
601 /*PL_curcop = 0;*/
602 /*PL_in_eval = PL_in_eval;*/ /* inherit */
603 SvREFCNT_dec (GvAV (PL_defgv));
604 GvAV (PL_defgv) = ctx->args;
605
606 SPAGAIN;
607
608 if (ctx->stack)
609 {
610 ctx->cursp = 0;
611
612 PUSHMARK(SP);
613 PUTBACK;
614 (void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
615
616 if (SvTRUE (ERRSV))
617 croak (NULL);
618 else
619 croak ("FATAL: CCTXT coroutine returned!");
620 }
621 else
622 {
623 UNOP myop;
624
625 PL_op = (OP *)&myop;
626
627 Zero(&myop, 1, UNOP);
628 myop.op_next = Nullop;
629 myop.op_flags = OPf_WANT_VOID;
630
631 PUSHMARK(SP);
632 XPUSHs (sub_init);
633 /*
634 * the next line is slightly wrong, as PL_op->op_next
635 * is actually being executed so we skip the first op.
636 * that doesn't matter, though, since it is only
637 * pp_nextstate and we never return...
638 * ah yes, and I don't care anyways ;)
639 */
640 PUTBACK;
641 PL_op = pp_entersub();
642 SPAGAIN;
643
644 ENTER; /* necessary e.g. for dounwind */
645 }
646}
647
648static void
649continue_coro (void *arg)
650{
651 /*
652 * this is a _very_ stripped down perl interpreter ;)
653 */
654 Coro__State ctx = (Coro__State)arg;
655
656 /*FIXME*//* must set up top_env here */
657 ctx->cursp = 0;
658 PL_op = PL_op->op_next;
659 CALLRUNOPS(aTHX);
660
661 abort ();
662}
663
664STATIC void
665transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
666{
667 dSTACKLEVEL;
668 static struct coro *xnext;
669
670 if (prev != next)
671 {
672 xnext = next;
673
674 if (next->mainstack)
675 {
676 SAVE (prev, flags);
677 LOAD (next);
678
679 /* mark this state as in-use */
680 next->mainstack = 0;
681 next->tmps_ix = -2;
682
683 /* stacklevel changed? if yes, grab the stack for us! */
684 if (flags & TRANSFER_SAVE_CCTXT)
685 {
686 if (!prev->stack)
687 allocate_stack (prev, 0);
688 else if (prev->cursp != stacklevel
689 && prev->stack->usecnt > 1)
690 {
691 prev->gencnt = ++prev->stack->gencnt;
692 prev->stack->usecnt = 1;
693 }
694
695 /* has our stack been invalidated? */
696 if (next->stack && next->stack->gencnt != next->gencnt)
697 {
698 deallocate_stack (next);
699 allocate_stack (next, 1);
700 coro_create (&(next->stack->cctx),
701 continue_coro, (void *)next,
702 next->stack->sptr, labs (next->stack->ssize));
703 }
704
705 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
706 /* don't add any code here */
707 }
708
709 }
710 else if (next->tmps_ix == -2)
711 croak ("tried to transfer to running coroutine");
712 else
713 {
714 SAVE (prev, -1); /* first get rid of the old state */
715
716 if (flags & TRANSFER_SAVE_CCTXT)
717 {
718 if (!prev->stack)
719 allocate_stack (prev, 0);
720
721 if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
722 {
723 setup_coro (next);
724
725 prev->stack->refcnt++;
726 prev->stack->usecnt++;
727 next->stack = prev->stack;
728 next->gencnt = prev->gencnt;
729 }
730 else
731 {
732 allocate_stack (next, 1);
733 coro_create (&(next->stack->cctx),
734 setup_coro, (void *)next,
735 next->stack->sptr, labs (next->stack->ssize));
736 coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
737 /* don't add any code here */
738 }
739 }
740 else
741 setup_coro (next);
742 }
743 }
744
745 /*
746 * xnext is now either prev or next, depending on wether
747 * we switched the c stack or not. that's why i use a global
748 * variable, that should become thread-specific at one point.
749 */
750 xnext->cursp = stacklevel;
751}
752
753static struct coro *
754sv_to_coro (SV *arg, const char *funcname, const char *varname)
755{
756 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)
757 {
758 HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);
759
760 if (!he)
761 croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
762
763 arg = HeVAL(he);
764 }
765
766 /* must also be changed inside Coro::Cont::yield */
767 if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash)
768 return (struct coro *) SvIV((SV*)SvRV(arg));
769
770 croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);
771 /*NORETURN*/
772}
773
774static void
775api_transfer(pTHX_ SV *prev, SV *next, int flags)
776{
777 transfer(aTHX_
778 sv_to_coro (prev, "Coro::transfer", "prev"),
779 sv_to_coro (next, "Coro::transfer", "next"),
780 flags);
781}
782 285
783/** Coro ********************************************************************/ 286/** Coro ********************************************************************/
784 287
785#define PRIO_MAX 3 288#define PRIO_MAX 3
786#define PRIO_HIGH 1 289#define PRIO_HIGH 1
… …
788#define PRIO_LOW -1 291#define PRIO_LOW -1
789#define PRIO_IDLE -3 292#define PRIO_IDLE -3
790#define PRIO_MIN -4 293#define PRIO_MIN -4
791 294
792/* for Coro.pm */ 295/* for Coro.pm */
793static GV *coro_current, *coro_idle; 296static SV *coro_current;
297static SV *coro_readyhook;
794static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 298static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
795static int coro_nready; 299static int coro_nready;
300static struct coro *coro_first;
301
302/** lowlevel stuff **********************************************************/
303
304static SV *
305coro_get_sv (pTHX_ const char *name, int create)
306{
307#if PERL_VERSION_ATLEAST (5,10,0)
308 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
309 get_sv (name, create);
310#endif
311 return get_sv (name, create);
312}
313
314static AV *
315coro_get_av (pTHX_ const char *name, int create)
316{
317#if PERL_VERSION_ATLEAST (5,10,0)
318 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
319 get_av (name, create);
320#endif
321 return get_av (name, create);
322}
323
324static HV *
325coro_get_hv (pTHX_ const char *name, int create)
326{
327#if PERL_VERSION_ATLEAST (5,10,0)
328 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
329 get_hv (name, create);
330#endif
331 return get_hv (name, create);
332}
333
334static AV *
335coro_clone_padlist (pTHX_ CV *cv)
336{
337 AV *padlist = CvPADLIST (cv);
338 AV *newpadlist, *newpad;
339
340 newpadlist = newAV ();
341 AvREAL_off (newpadlist);
342#if PERL_VERSION_ATLEAST (5,10,0)
343 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
344#else
345 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
346#endif
347 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
348 --AvFILLp (padlist);
349
350 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
351 av_store (newpadlist, 1, (SV *)newpad);
352
353 return newpadlist;
354}
796 355
797static void 356static void
798coro_enq (SV *sv) 357free_padlist (pTHX_ AV *padlist)
799{ 358{
800 if (SvROK (sv)) 359 /* may be during global destruction */
360 if (SvREFCNT (padlist))
801 { 361 {
802 SV *hv = SvRV (sv); 362 I32 i = AvFILLp (padlist);
803 if (SvTYPE (hv) == SVt_PVHV) 363 while (i >= 0)
804 { 364 {
805 SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0); 365 SV **svp = av_fetch (padlist, i--, FALSE);
806 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 366 if (svp)
367 {
368 SV *sv;
369 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
370 SvREFCNT_dec (sv);
807 371
808 prio = prio > PRIO_MAX ? PRIO_MAX 372 SvREFCNT_dec (*svp);
809 : prio < PRIO_MIN ? PRIO_MIN 373 }
810 : prio;
811
812 av_push (coro_ready [prio - PRIO_MIN], sv);
813 coro_nready++;
814
815 return;
816 } 374 }
375
376 SvREFCNT_dec ((SV*)padlist);
377 }
378}
379
380static int
381coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
382{
383 AV *padlist;
384 AV *av = (AV *)mg->mg_obj;
385
386 /* casting is fun. */
387 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
388 free_padlist (aTHX_ padlist);
389
390 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
391
392 return 0;
393}
394
395#define CORO_MAGIC_type_cv PERL_MAGIC_ext
396#define CORO_MAGIC_type_state PERL_MAGIC_ext
397
398static MGVTBL coro_cv_vtbl = {
399 0, 0, 0, 0,
400 coro_cv_free
401};
402
403#define CORO_MAGIC(sv, type) \
404 SvMAGIC (sv) \
405 ? SvMAGIC (sv)->mg_type == type \
406 ? SvMAGIC (sv) \
407 : mg_find (sv, type) \
408 : 0
409
410#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
411#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
412
413static struct coro *
414SvSTATE_ (pTHX_ SV *coro)
415{
416 HV *stash;
417 MAGIC *mg;
418
419 if (SvROK (coro))
420 coro = SvRV (coro);
421
422 if (expect_false (SvTYPE (coro) != SVt_PVHV))
423 croak ("Coro::State object required");
424
425 stash = SvSTASH (coro);
426 if (expect_false (stash != coro_stash && stash != coro_state_stash))
427 {
428 /* very slow, but rare, check */
429 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
430 croak ("Coro::State object required");
431 }
432
433 mg = CORO_MAGIC_state (coro);
434 return (struct coro *)mg->mg_ptr;
435}
436
437#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
438
439/* the next two functions merely cache the padlists */
440static void
441get_padlist (pTHX_ CV *cv)
442{
443 MAGIC *mg = CORO_MAGIC_cv (cv);
444 AV *av;
445
446 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
447 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
448 else
449 {
450#if CORO_PREFER_PERL_FUNCTIONS
451 /* this is probably cleaner? but also slower! */
452 /* in practise, it seems to be less stable */
453 CV *cp = Perl_cv_clone (cv);
454 CvPADLIST (cv) = CvPADLIST (cp);
455 CvPADLIST (cp) = 0;
456 SvREFCNT_dec (cp);
457#else
458 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
459#endif
817 } 460 }
461}
818 462
819 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 463static void
464put_padlist (pTHX_ CV *cv)
465{
466 MAGIC *mg = CORO_MAGIC_cv (cv);
467 AV *av;
468
469 if (expect_false (!mg))
470 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
471
472 av = (AV *)mg->mg_obj;
473
474 if (expect_false (AvFILLp (av) >= AvMAX (av)))
475 av_extend (av, AvMAX (av) + 1);
476
477 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
478}
479
480/** load & save, init *******************************************************/
481
482static void
483load_perl (pTHX_ Coro__State c)
484{
485 perl_slots *slot = c->slot;
486 c->slot = 0;
487
488 PL_mainstack = c->mainstack;
489
490 GvSV (PL_defgv) = slot->defsv;
491 GvAV (PL_defgv) = slot->defav;
492 GvSV (PL_errgv) = slot->errsv;
493 GvSV (irsgv) = slot->irsgv;
494
495 #define VAR(name,type) PL_ ## name = slot->name;
496 # include "state.h"
497 #undef VAR
498
499 {
500 dSP;
501
502 CV *cv;
503
504 /* now do the ugly restore mess */
505 while (expect_true (cv = (CV *)POPs))
506 {
507 put_padlist (aTHX_ cv); /* mark this padlist as available */
508 CvDEPTH (cv) = PTR2IV (POPs);
509 CvPADLIST (cv) = (AV *)POPs;
510 }
511
512 PUTBACK;
513 }
514}
515
516static void
517save_perl (pTHX_ Coro__State c)
518{
519 {
520 dSP;
521 I32 cxix = cxstack_ix;
522 PERL_CONTEXT *ccstk = cxstack;
523 PERL_SI *top_si = PL_curstackinfo;
524
525 /*
526 * the worst thing you can imagine happens first - we have to save
527 * (and reinitialize) all cv's in the whole callchain :(
528 */
529
530 XPUSHs (Nullsv);
531 /* this loop was inspired by pp_caller */
532 for (;;)
533 {
534 while (expect_true (cxix >= 0))
535 {
536 PERL_CONTEXT *cx = &ccstk[cxix--];
537
538 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
539 {
540 CV *cv = cx->blk_sub.cv;
541
542 if (expect_true (CvDEPTH (cv)))
543 {
544 EXTEND (SP, 3);
545 PUSHs ((SV *)CvPADLIST (cv));
546 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
547 PUSHs ((SV *)cv);
548
549 CvDEPTH (cv) = 0;
550 get_padlist (aTHX_ cv);
551 }
552 }
553 }
554
555 if (expect_true (top_si->si_type == PERLSI_MAIN))
556 break;
557
558 top_si = top_si->si_prev;
559 ccstk = top_si->si_cxstack;
560 cxix = top_si->si_cxix;
561 }
562
563 PUTBACK;
564 }
565
566 /* allocate some space on the context stack for our purposes */
567 /* we manually unroll here, as usually 2 slots is enough */
568 if (SLOT_COUNT >= 1) CXINC;
569 if (SLOT_COUNT >= 2) CXINC;
570 if (SLOT_COUNT >= 3) CXINC;
571 {
572 int i;
573 for (i = 3; i < SLOT_COUNT; ++i)
574 CXINC;
575 }
576 cxstack_ix -= SLOT_COUNT; /* undo allocation */
577
578 c->mainstack = PL_mainstack;
579
580 {
581 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
582
583 slot->defav = GvAV (PL_defgv);
584 slot->defsv = DEFSV;
585 slot->errsv = ERRSV;
586 slot->irsgv = GvSV (irsgv);
587
588 #define VAR(name,type) slot->name = PL_ ## name;
589 # include "state.h"
590 #undef VAR
591 }
592}
593
594/*
595 * allocate various perl stacks. This is an exact copy
596 * of perl.c:init_stacks, except that it uses less memory
597 * on the (sometimes correct) assumption that coroutines do
598 * not usually need a lot of stackspace.
599 */
600#if CORO_PREFER_PERL_FUNCTIONS
601# define coro_init_stacks init_stacks
602#else
603static void
604coro_init_stacks (pTHX)
605{
606 PL_curstackinfo = new_stackinfo(32, 8);
607 PL_curstackinfo->si_type = PERLSI_MAIN;
608 PL_curstack = PL_curstackinfo->si_stack;
609 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
610
611 PL_stack_base = AvARRAY(PL_curstack);
612 PL_stack_sp = PL_stack_base;
613 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
614
615 New(50,PL_tmps_stack,32,SV*);
616 PL_tmps_floor = -1;
617 PL_tmps_ix = -1;
618 PL_tmps_max = 32;
619
620 New(54,PL_markstack,16,I32);
621 PL_markstack_ptr = PL_markstack;
622 PL_markstack_max = PL_markstack + 16;
623
624#ifdef SET_MARK_OFFSET
625 SET_MARK_OFFSET;
626#endif
627
628 New(54,PL_scopestack,8,I32);
629 PL_scopestack_ix = 0;
630 PL_scopestack_max = 8;
631
632 New(54,PL_savestack,24,ANY);
633 PL_savestack_ix = 0;
634 PL_savestack_max = 24;
635
636#if !PERL_VERSION_ATLEAST (5,10,0)
637 New(54,PL_retstack,4,OP*);
638 PL_retstack_ix = 0;
639 PL_retstack_max = 4;
640#endif
641}
642#endif
643
644/*
645 * destroy the stacks, the callchain etc...
646 */
647static void
648coro_destruct_stacks (pTHX)
649{
650 while (PL_curstackinfo->si_next)
651 PL_curstackinfo = PL_curstackinfo->si_next;
652
653 while (PL_curstackinfo)
654 {
655 PERL_SI *p = PL_curstackinfo->si_prev;
656
657 if (!IN_DESTRUCT)
658 SvREFCNT_dec (PL_curstackinfo->si_stack);
659
660 Safefree (PL_curstackinfo->si_cxstack);
661 Safefree (PL_curstackinfo);
662 PL_curstackinfo = p;
663 }
664
665 Safefree (PL_tmps_stack);
666 Safefree (PL_markstack);
667 Safefree (PL_scopestack);
668 Safefree (PL_savestack);
669#if !PERL_VERSION_ATLEAST (5,10,0)
670 Safefree (PL_retstack);
671#endif
672}
673
674static size_t
675coro_rss (pTHX_ struct coro *coro)
676{
677 size_t rss = sizeof (*coro);
678
679 if (coro->mainstack)
680 {
681 perl_slots tmp_slot;
682 perl_slots *slot;
683
684 if (coro->flags & CF_RUNNING)
685 {
686 slot = &tmp_slot;
687
688 #define VAR(name,type) slot->name = PL_ ## name;
689 # include "state.h"
690 #undef VAR
691 }
692 else
693 slot = coro->slot;
694
695 if (slot)
696 {
697 rss += sizeof (slot->curstackinfo);
698 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
699 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
700 rss += slot->tmps_max * sizeof (SV *);
701 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
702 rss += slot->scopestack_max * sizeof (I32);
703 rss += slot->savestack_max * sizeof (ANY);
704
705#if !PERL_VERSION_ATLEAST (5,10,0)
706 rss += slot->retstack_max * sizeof (OP *);
707#endif
708 }
709 }
710
711 return rss;
712}
713
714/** coroutine stack handling ************************************************/
715
716static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
717static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
718static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
719
720/* apparently < 5.8.8 */
721#ifndef MgPV_nolen_const
722#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
723 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
724 (const char*)(mg)->mg_ptr)
725#endif
726
727/*
728 * This overrides the default magic get method of %SIG elements.
729 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
730 * and instead of tryign to save and restore the hash elements, we just provide
731 * readback here.
732 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
733 * not expecting this to actually change the hook. This is a potential problem
734 * when a schedule happens then, but we ignore this.
735 */
736static int
737coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
738{
739 const char *s = MgPV_nolen_const (mg);
740
741 if (*s == '_')
742 {
743 SV **svp = 0;
744
745 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
746 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
747
748 if (svp)
749 {
750 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
751 return 0;
752 }
753 }
754
755 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
756}
757
758static int
759coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
760{
761 const char *s = MgPV_nolen_const (mg);
762
763 if (*s == '_')
764 {
765 SV **svp = 0;
766
767 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
768 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
769
770 if (svp)
771 {
772 SV *old = *svp;
773 *svp = 0;
774 SvREFCNT_dec (old);
775 return 0;
776 }
777 }
778
779 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
780}
781
782static int
783coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
784{
785 const char *s = MgPV_nolen_const (mg);
786
787 if (*s == '_')
788 {
789 SV **svp = 0;
790
791 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
792 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
793
794 if (svp)
795 {
796 SV *old = *svp;
797 *svp = newSVsv (sv);
798 SvREFCNT_dec (old);
799 return 0;
800 }
801 }
802
803 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
804}
805
806static void
807coro_setup (pTHX_ struct coro *coro)
808{
809 /*
810 * emulate part of the perl startup here.
811 */
812 coro_init_stacks (aTHX);
813
814 PL_runops = RUNOPS_DEFAULT;
815 PL_curcop = &PL_compiling;
816 PL_in_eval = EVAL_NULL;
817 PL_comppad = 0;
818 PL_curpm = 0;
819 PL_curpad = 0;
820 PL_localizing = 0;
821 PL_dirty = 0;
822 PL_restartop = 0;
823#if PERL_VERSION_ATLEAST (5,10,0)
824 PL_parser = 0;
825#endif
826
827 /* recreate the die/warn hooks */
828 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
829 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
830
831 GvSV (PL_defgv) = newSV (0);
832 GvAV (PL_defgv) = coro->args; coro->args = 0;
833 GvSV (PL_errgv) = newSV (0);
834 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
835 PL_rs = newSVsv (GvSV (irsgv));
836 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
837
838 {
839 dSP;
840 LOGOP myop;
841
842 Zero (&myop, 1, LOGOP);
843 myop.op_next = Nullop;
844 myop.op_flags = OPf_WANT_VOID;
845
846 PUSHMARK (SP);
847 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
848 PUTBACK;
849 PL_op = (OP *)&myop;
850 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
851 SPAGAIN;
852 }
853
854 /* this newly created coroutine might be run on an existing cctx which most
855 * likely was suspended in set_stacklevel, called from entersub.
856 * set_stacklevl doesn't do anything on return, but entersub does LEAVE,
857 * so we ENTER here for symmetry
858 */
859 ENTER;
860}
861
862static void
863coro_destruct (pTHX_ struct coro *coro)
864{
865 if (!IN_DESTRUCT)
866 {
867 /* restore all saved variables and stuff */
868 LEAVE_SCOPE (0);
869 assert (PL_tmps_floor == -1);
870
871 /* free all temporaries */
872 FREETMPS;
873 assert (PL_tmps_ix == -1);
874
875 /* unwind all extra stacks */
876 POPSTACK_TO (PL_mainstack);
877
878 /* unwind main stack */
879 dounwind (-1);
880 }
881
882 SvREFCNT_dec (GvSV (PL_defgv));
883 SvREFCNT_dec (GvAV (PL_defgv));
884 SvREFCNT_dec (GvSV (PL_errgv));
885 SvREFCNT_dec (PL_defoutgv);
886 SvREFCNT_dec (PL_rs);
887 SvREFCNT_dec (GvSV (irsgv));
888
889 SvREFCNT_dec (PL_diehook);
890 SvREFCNT_dec (PL_warnhook);
891
892 SvREFCNT_dec (coro->saved_deffh);
893 SvREFCNT_dec (coro->throw);
894
895 coro_destruct_stacks (aTHX);
896}
897
898static void
899free_coro_mortal (pTHX)
900{
901 if (expect_true (coro_mortal))
902 {
903 SvREFCNT_dec (coro_mortal);
904 coro_mortal = 0;
905 }
906}
907
908static int
909runops_trace (pTHX)
910{
911 COP *oldcop = 0;
912 int oldcxix = -2;
913 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
914 coro_cctx *cctx = coro->cctx;
915
916 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
917 {
918 PERL_ASYNC_CHECK ();
919
920 if (cctx->flags & CC_TRACE_ALL)
921 {
922 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
923 {
924 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
925 SV **bot, **top;
926 AV *av = newAV (); /* return values */
927 SV **cb;
928 dSP;
929
930 GV *gv = CvGV (cx->blk_sub.cv);
931 SV *fullname = sv_2mortal (newSV (0));
932 if (isGV (gv))
933 gv_efullname3 (fullname, gv, 0);
934
935 bot = PL_stack_base + cx->blk_oldsp + 1;
936 top = cx->blk_gimme == G_ARRAY ? SP + 1
937 : cx->blk_gimme == G_SCALAR ? bot + 1
938 : bot;
939
940 av_extend (av, top - bot);
941 while (bot < top)
942 av_push (av, SvREFCNT_inc_NN (*bot++));
943
944 PL_runops = RUNOPS_DEFAULT;
945 ENTER;
946 SAVETMPS;
947 EXTEND (SP, 3);
948 PUSHMARK (SP);
949 PUSHs (&PL_sv_no);
950 PUSHs (fullname);
951 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
952 PUTBACK;
953 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
954 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
955 SPAGAIN;
956 FREETMPS;
957 LEAVE;
958 PL_runops = runops_trace;
959 }
960
961 if (oldcop != PL_curcop)
962 {
963 oldcop = PL_curcop;
964
965 if (PL_curcop != &PL_compiling)
966 {
967 SV **cb;
968
969 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
970 {
971 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
972
973 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
974 {
975 runops_proc_t old_runops = PL_runops;
976 dSP;
977 GV *gv = CvGV (cx->blk_sub.cv);
978 SV *fullname = sv_2mortal (newSV (0));
979
980 if (isGV (gv))
981 gv_efullname3 (fullname, gv, 0);
982
983 PL_runops = RUNOPS_DEFAULT;
984 ENTER;
985 SAVETMPS;
986 EXTEND (SP, 3);
987 PUSHMARK (SP);
988 PUSHs (&PL_sv_yes);
989 PUSHs (fullname);
990 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
991 PUTBACK;
992 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
993 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
994 SPAGAIN;
995 FREETMPS;
996 LEAVE;
997 PL_runops = runops_trace;
998 }
999
1000 oldcxix = cxstack_ix;
1001 }
1002
1003 if (cctx->flags & CC_TRACE_LINE)
1004 {
1005 dSP;
1006
1007 PL_runops = RUNOPS_DEFAULT;
1008 ENTER;
1009 SAVETMPS;
1010 EXTEND (SP, 3);
1011 PL_runops = RUNOPS_DEFAULT;
1012 PUSHMARK (SP);
1013 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1014 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1015 PUTBACK;
1016 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1017 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1018 SPAGAIN;
1019 FREETMPS;
1020 LEAVE;
1021 PL_runops = runops_trace;
1022 }
1023 }
1024 }
1025 }
1026 }
1027
1028 TAINT_NOT;
1029 return 0;
1030}
1031
1032/* inject a fake call to Coro::State::_cctx_init into the execution */
1033/* _cctx_init should be careful, as it could be called at almost any time */
1034/* during execution of a perl program */
1035/* also initialises PL_top_env */
1036static void NOINLINE
1037cctx_prepare (pTHX_ coro_cctx *cctx)
1038{
1039 dSP;
1040 LOGOP myop;
1041
1042 PL_top_env = &PL_start_env;
1043
1044 if (cctx->flags & CC_TRACE)
1045 PL_runops = runops_trace;
1046
1047 Zero (&myop, 1, LOGOP);
1048 myop.op_next = PL_op;
1049 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1050
1051 PUSHMARK (SP);
1052 EXTEND (SP, 2);
1053 PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
1054 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1055 PUTBACK;
1056 PL_op = (OP *)&myop;
1057 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1058 SPAGAIN;
1059}
1060
1061/* the tail of transfer: execute stuff we can onyl do afetr a transfer */
1062static void
1063transfer_tail (void)
1064{
1065 UNLOCK;
1066
1067 if (expect_false (next_has_throw))
1068 {
1069 struct coro *coro = SvSTATE (coro_current);
1070
1071 if (coro->throw)
1072 {
1073 SV *exception = coro->throw;
1074 coro->throw = 0;
1075 sv_setsv (ERRSV, exception);
1076 croak (0);
1077 }
1078 }
1079}
1080
1081/*
1082 * this is a _very_ stripped down perl interpreter ;)
1083 */
1084static void
1085cctx_run (void *arg)
1086{
1087#ifdef USE_ITHREADS
1088# if CORO_PTHREAD
1089 PERL_SET_CONTEXT (coro_thx);
1090# endif
1091#endif
1092 {
1093 dTHX;
1094
1095 /* we now skip the entersub that lead to transfer () */
1096 PL_op = PL_op->op_next;
1097
1098 /* inject a fake subroutine call to cctx_init */
1099 cctx_prepare (aTHX_ (coro_cctx *)arg);
1100
1101 /* cctx_run is the alternative tail of transfer () */
1102 transfer_tail ();
1103
1104 /* somebody or something will hit me for both perl_run and PL_restartop */
1105 PL_restartop = PL_op;
1106 perl_run (PL_curinterp);
1107
1108 /*
1109 * If perl-run returns we assume exit() was being called or the coro
1110 * fell off the end, which seems to be the only valid (non-bug)
1111 * reason for perl_run to return. We try to exit by jumping to the
1112 * bootstrap-time "top" top_env, as we cannot restore the "main"
1113 * coroutine as Coro has no such concept
1114 */
1115 PL_top_env = main_top_env;
1116 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1117 }
1118}
1119
1120static coro_cctx *
1121cctx_new ()
1122{
1123 coro_cctx *cctx;
1124
1125 ++cctx_count;
1126 New (0, cctx, 1, coro_cctx);
1127
1128 cctx->gen = cctx_gen;
1129 cctx->flags = 0;
1130 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel */
1131
1132 return cctx;
1133}
1134
1135/* create a new cctx only suitable as source */
1136static coro_cctx *
1137cctx_new_empty ()
1138{
1139 coro_cctx *cctx = cctx_new ();
1140
1141 cctx->sptr = 0;
1142 coro_create (&cctx->cctx, 0, 0, 0, 0);
1143
1144 return cctx;
1145}
1146
1147/* create a new cctx suitable as destination/running a perl interpreter */
1148static coro_cctx *
1149cctx_new_run ()
1150{
1151 coro_cctx *cctx = cctx_new ();
1152 void *stack_start;
1153 size_t stack_size;
1154
1155#if HAVE_MMAP
1156 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1157 /* mmap supposedly does allocate-on-write for us */
1158 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1159
1160 if (cctx->sptr != (void *)-1)
1161 {
1162# if CORO_STACKGUARD
1163 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1164# endif
1165 stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
1166 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1167 cctx->flags |= CC_MAPPED;
1168 }
1169 else
1170#endif
1171 {
1172 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1173 New (0, cctx->sptr, cctx_stacksize, long);
1174
1175 if (!cctx->sptr)
1176 {
1177 perror ("FATAL: unable to allocate stack for coroutine");
1178 _exit (EXIT_FAILURE);
1179 }
1180
1181 stack_start = cctx->sptr;
1182 stack_size = cctx->ssize;
1183 }
1184
1185 REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
1186 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1187
1188 return cctx;
1189}
1190
1191static void
1192cctx_destroy (coro_cctx *cctx)
1193{
1194 if (!cctx)
1195 return;
1196
1197 --cctx_count;
1198 coro_destroy (&cctx->cctx);
1199
1200 /* coro_transfer creates new, empty cctx's */
1201 if (cctx->sptr)
1202 {
1203#if CORO_USE_VALGRIND
1204 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1205#endif
1206
1207#if HAVE_MMAP
1208 if (cctx->flags & CC_MAPPED)
1209 munmap (cctx->sptr, cctx->ssize);
1210 else
1211#endif
1212 Safefree (cctx->sptr);
1213 }
1214
1215 Safefree (cctx);
1216}
1217
1218/* wether this cctx should be destructed */
1219#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1220
1221static coro_cctx *
1222cctx_get (pTHX)
1223{
1224 while (expect_true (cctx_first))
1225 {
1226 coro_cctx *cctx = cctx_first;
1227 cctx_first = cctx->next;
1228 --cctx_idle;
1229
1230 if (expect_true (!CCTX_EXPIRED (cctx)))
1231 return cctx;
1232
1233 cctx_destroy (cctx);
1234 }
1235
1236 return cctx_new_run ();
1237}
1238
1239static void
1240cctx_put (coro_cctx *cctx)
1241{
1242 assert (("cctx_put called on non-initialised cctx", cctx->sptr));
1243
1244 /* free another cctx if overlimit */
1245 if (expect_false (cctx_idle >= cctx_max_idle))
1246 {
1247 coro_cctx *first = cctx_first;
1248 cctx_first = first->next;
1249 --cctx_idle;
1250
1251 cctx_destroy (first);
1252 }
1253
1254 ++cctx_idle;
1255 cctx->next = cctx_first;
1256 cctx_first = cctx;
1257}
1258
1259/** coroutine switching *****************************************************/
1260
1261static void
1262transfer_check (pTHX_ struct coro *prev, struct coro *next)
1263{
1264 if (expect_true (prev != next))
1265 {
1266 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1267 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1268
1269 if (expect_false (next->flags & CF_RUNNING))
1270 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1271
1272 if (expect_false (next->flags & CF_DESTROYED))
1273 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1274
1275#if !PERL_VERSION_ATLEAST (5,10,0)
1276 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1277 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1278#endif
1279 }
1280}
1281
1282/* always use the TRANSFER macro */
1283static void NOINLINE
1284transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1285{
1286 dSTACKLEVEL;
1287
1288 /* sometimes transfer is only called to set idle_sp */
1289 if (expect_false (!next))
1290 {
1291 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1292 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1293 }
1294 else if (expect_true (prev != next))
1295 {
1296 coro_cctx *prev__cctx;
1297
1298 if (expect_false (prev->flags & CF_NEW))
1299 {
1300 /* create a new empty/source context */
1301 prev->cctx = cctx_new_empty ();
1302 prev->flags &= ~CF_NEW;
1303 prev->flags |= CF_RUNNING;
1304 }
1305
1306 prev->flags &= ~CF_RUNNING;
1307 next->flags |= CF_RUNNING;
1308
1309 LOCK;
1310
1311 /* first get rid of the old state */
1312 save_perl (aTHX_ prev);
1313
1314 if (expect_false (next->flags & CF_NEW))
1315 {
1316 /* need to start coroutine */
1317 next->flags &= ~CF_NEW;
1318 /* setup coroutine call */
1319 coro_setup (aTHX_ next);
1320 }
1321 else
1322 load_perl (aTHX_ next);
1323
1324 prev__cctx = prev->cctx;
1325
1326 if (prev__cctx->idle_sp == STACKLEVEL) asm volatile("");//D
1327
1328 /* possibly "free" the cctx */
1329 if (expect_true (
1330 prev__cctx->idle_sp == STACKLEVEL
1331 && !(prev__cctx->flags & CC_TRACE)
1332 && !force_cctx
1333 ))
1334 {
1335 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1336 assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
1337
1338 prev->cctx = 0;
1339
1340 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1341 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1342 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1343 if (!next->cctx)
1344 next->cctx = cctx_get (aTHX);
1345
1346 cctx_put (prev__cctx);
1347 }
1348
1349 ++next->usecount;
1350
1351 if (expect_true (!next->cctx))
1352 next->cctx = cctx_get (aTHX);
1353
1354 next_has_throw = !!next->throw;
1355
1356 if (expect_false (prev__cctx != next->cctx))
1357 {
1358 prev__cctx->top_env = PL_top_env;
1359 PL_top_env = next->cctx->top_env;
1360 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1361 }
1362
1363 free_coro_mortal (aTHX);
1364 UNLOCK;
1365
1366 transfer_tail ();
1367 }
1368}
1369
1370struct transfer_args
1371{
1372 struct coro *prev, *next;
1373};
1374
1375#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1376#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1377
1378/** high level stuff ********************************************************/
1379
1380static int
1381coro_state_destroy (pTHX_ struct coro *coro)
1382{
1383 if (coro->flags & CF_DESTROYED)
1384 return 0;
1385
1386 coro->flags |= CF_DESTROYED;
1387
1388 if (coro->flags & CF_READY)
1389 {
1390 /* reduce nready, as destroying a ready coro effectively unreadies it */
1391 /* alternative: look through all ready queues and remove the coro */
1392 LOCK;
1393 --coro_nready;
1394 UNLOCK;
1395 }
1396 else
1397 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1398
1399 if (coro->mainstack && coro->mainstack != main_mainstack)
1400 {
1401 struct coro temp;
1402
1403 if (coro->flags & CF_RUNNING)
1404 croak ("FATAL: tried to destroy currently running coroutine");
1405
1406 save_perl (aTHX_ &temp);
1407 load_perl (aTHX_ coro);
1408
1409 coro_destruct (aTHX_ coro);
1410
1411 load_perl (aTHX_ &temp);
1412
1413 coro->slot = 0;
1414 }
1415
1416 cctx_destroy (coro->cctx);
1417 SvREFCNT_dec (coro->args);
1418
1419 if (coro->next) coro->next->prev = coro->prev;
1420 if (coro->prev) coro->prev->next = coro->next;
1421 if (coro == coro_first) coro_first = coro->next;
1422
1423 return 1;
1424}
1425
1426static int
1427coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1428{
1429 struct coro *coro = (struct coro *)mg->mg_ptr;
1430 mg->mg_ptr = 0;
1431
1432 coro->hv = 0;
1433
1434 if (--coro->refcnt < 0)
1435 {
1436 coro_state_destroy (aTHX_ coro);
1437 Safefree (coro);
1438 }
1439
1440 return 0;
1441}
1442
1443static int
1444coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1445{
1446 struct coro *coro = (struct coro *)mg->mg_ptr;
1447
1448 ++coro->refcnt;
1449
1450 return 0;
1451}
1452
1453static MGVTBL coro_state_vtbl = {
1454 0, 0, 0, 0,
1455 coro_state_free,
1456 0,
1457#ifdef MGf_DUP
1458 coro_state_dup,
1459#else
1460# define MGf_DUP 0
1461#endif
1462};
1463
1464static void
1465prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1466{
1467 ta->prev = SvSTATE (prev_sv);
1468 ta->next = SvSTATE (next_sv);
1469 TRANSFER_CHECK (*ta);
1470}
1471
1472static void
1473api_transfer (SV *prev_sv, SV *next_sv)
1474{
1475 dTHX;
1476 struct transfer_args ta;
1477
1478 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1479 TRANSFER (ta, 1);
1480}
1481
1482/** Coro ********************************************************************/
1483
1484static void
1485coro_enq (pTHX_ SV *coro_sv)
1486{
1487 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
820} 1488}
821 1489
822static SV * 1490static SV *
823coro_deq (int min_prio) 1491coro_deq (pTHX)
824{ 1492{
825 int prio = PRIO_MAX - PRIO_MIN; 1493 int prio;
826 1494
827 min_prio -= PRIO_MIN;
828 if (min_prio < 0)
829 min_prio = 0;
830
831 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; ) 1495 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
832 if (av_len (coro_ready[prio]) >= 0) 1496 if (AvFILLp (coro_ready [prio]) >= 0)
833 {
834 coro_nready--;
835 return av_shift (coro_ready[prio]); 1497 return av_shift (coro_ready [prio]);
836 }
837 1498
838 return 0; 1499 return 0;
839} 1500}
840 1501
1502static int
1503api_ready (SV *coro_sv)
1504{
1505 dTHX;
1506 struct coro *coro;
1507 SV *sv_hook;
1508 void (*xs_hook)(void);
1509
1510 if (SvROK (coro_sv))
1511 coro_sv = SvRV (coro_sv);
1512
1513 coro = SvSTATE (coro_sv);
1514
1515 if (coro->flags & CF_READY)
1516 return 0;
1517
1518 coro->flags |= CF_READY;
1519
1520 LOCK;
1521
1522 sv_hook = coro_nready ? 0 : coro_readyhook;
1523 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1524
1525 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1526 ++coro_nready;
1527
1528 UNLOCK;
1529
1530 if (sv_hook)
1531 {
1532 dSP;
1533
1534 ENTER;
1535 SAVETMPS;
1536
1537 PUSHMARK (SP);
1538 PUTBACK;
1539 call_sv (sv_hook, G_DISCARD);
1540 SPAGAIN;
1541
1542 FREETMPS;
1543 LEAVE;
1544 }
1545
1546 if (xs_hook)
1547 xs_hook ();
1548
1549 return 1;
1550}
1551
1552static int
1553api_is_ready (SV *coro_sv)
1554{
1555 dTHX;
1556 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1557}
1558
841static void 1559static void
842api_ready (SV *coro) 1560prepare_schedule (pTHX_ struct transfer_args *ta)
843{ 1561{
844 coro_enq (SvREFCNT_inc (coro)); 1562 SV *prev_sv, *next_sv;
1563
1564 for (;;)
1565 {
1566 LOCK;
1567 next_sv = coro_deq (aTHX);
1568
1569 /* nothing to schedule: call the idle handler */
1570 if (expect_false (!next_sv))
1571 {
1572 dSP;
1573 UNLOCK;
1574
1575 ENTER;
1576 SAVETMPS;
1577
1578 PUSHMARK (SP);
1579 PUTBACK;
1580 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1581 SPAGAIN;
1582
1583 FREETMPS;
1584 LEAVE;
1585 continue;
1586 }
1587
1588 ta->next = SvSTATE (next_sv);
1589
1590 /* cannot transfer to destroyed coros, skip and look for next */
1591 if (expect_false (ta->next->flags & CF_DESTROYED))
1592 {
1593 UNLOCK;
1594 SvREFCNT_dec (next_sv);
1595 /* coro_nready is already taken care of by destroy */
1596 continue;
1597 }
1598
1599 --coro_nready;
1600 UNLOCK;
1601 break;
1602 }
1603
1604 /* free this only after the transfer */
1605 prev_sv = SvRV (coro_current);
1606 ta->prev = SvSTATE (prev_sv);
1607 TRANSFER_CHECK (*ta);
1608 assert (ta->next->flags & CF_READY);
1609 ta->next->flags &= ~CF_READY;
1610 SvRV_set (coro_current, next_sv);
1611
1612 LOCK;
1613 free_coro_mortal (aTHX);
1614 coro_mortal = prev_sv;
1615 UNLOCK;
845} 1616}
846 1617
847static void 1618static void
848api_schedule (int cede) 1619prepare_cede (pTHX_ struct transfer_args *ta)
849{ 1620{
850 SV *prev, *next; 1621 api_ready (coro_current);
1622 prepare_schedule (aTHX_ ta);
1623}
851 1624
1625static int
1626prepare_cede_notself (pTHX_ struct transfer_args *ta)
1627{
1628 if (coro_nready)
1629 {
852 prev = GvSV (coro_current); 1630 SV *prev = SvRV (coro_current);
853 1631 prepare_schedule (aTHX_ ta);
854 if (cede) 1632 api_ready (prev);
855 coro_enq (SvREFCNT_inc (prev)); 1633 return 1;
856 1634 }
857 next = coro_deq (PRIO_MIN); 1635 else
858 1636 return 0;
859 if (!next)
860 next = SvREFCNT_inc (GvSV (coro_idle));
861
862 GvSV (coro_current) = SvREFCNT_inc (next);
863 transfer (aTHX_
864 sv_to_coro (prev, "Coro::schedule", "current coroutine"),
865 sv_to_coro (next, "Coro::schedule", "next coroutine"),
866 TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
867 SvREFCNT_dec (next);
868 SvREFCNT_dec (prev);
869} 1637}
870 1638
1639static void
1640api_schedule (void)
1641{
1642 dTHX;
1643 struct transfer_args ta;
1644
1645 prepare_schedule (aTHX_ &ta);
1646 TRANSFER (ta, 1);
1647}
1648
1649static int
1650api_cede (void)
1651{
1652 dTHX;
1653 struct transfer_args ta;
1654
1655 prepare_cede (aTHX_ &ta);
1656
1657 if (expect_true (ta.prev != ta.next))
1658 {
1659 TRANSFER (ta, 1);
1660 return 1;
1661 }
1662 else
1663 return 0;
1664}
1665
1666static int
1667api_cede_notself (void)
1668{
1669 dTHX;
1670 struct transfer_args ta;
1671
1672 if (prepare_cede_notself (aTHX_ &ta))
1673 {
1674 TRANSFER (ta, 1);
1675 return 1;
1676 }
1677 else
1678 return 0;
1679}
1680
1681static void
1682api_trace (SV *coro_sv, int flags)
1683{
1684 dTHX;
1685 struct coro *coro = SvSTATE (coro_sv);
1686
1687 if (flags & CC_TRACE)
1688 {
1689 if (!coro->cctx)
1690 coro->cctx = cctx_new_run ();
1691 else if (!(coro->cctx->flags & CC_TRACE))
1692 croak ("cannot enable tracing on coroutine with custom stack");
1693
1694 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
1695 }
1696 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1697 {
1698 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
1699
1700 if (coro->flags & CF_RUNNING)
1701 PL_runops = RUNOPS_DEFAULT;
1702 else
1703 coro->slot->runops = RUNOPS_DEFAULT;
1704 }
1705}
1706
1707#if 0
1708static int
1709coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1710{
1711 AV *padlist;
1712 AV *av = (AV *)mg->mg_obj;
1713
1714 abort ();
1715
1716 return 0;
1717}
1718
1719static MGVTBL coro_gensub_vtbl = {
1720 0, 0, 0, 0,
1721 coro_gensub_free
1722};
1723#endif
1724
1725/*****************************************************************************/
1726/* PerlIO::cede */
1727
1728typedef struct
1729{
1730 PerlIOBuf base;
1731 NV next, every;
1732} PerlIOCede;
1733
1734static IV
1735PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1736{
1737 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1738
1739 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1740 self->next = nvtime () + self->every;
1741
1742 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1743}
1744
1745static SV *
1746PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1747{
1748 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1749
1750 return newSVnv (self->every);
1751}
1752
1753static IV
1754PerlIOCede_flush (pTHX_ PerlIO *f)
1755{
1756 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1757 double now = nvtime ();
1758
1759 if (now >= self->next)
1760 {
1761 api_cede ();
1762 self->next = now + self->every;
1763 }
1764
1765 return PerlIOBuf_flush (aTHX_ f);
1766}
1767
1768static PerlIO_funcs PerlIO_cede =
1769{
1770 sizeof(PerlIO_funcs),
1771 "cede",
1772 sizeof(PerlIOCede),
1773 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1774 PerlIOCede_pushed,
1775 PerlIOBuf_popped,
1776 PerlIOBuf_open,
1777 PerlIOBase_binmode,
1778 PerlIOCede_getarg,
1779 PerlIOBase_fileno,
1780 PerlIOBuf_dup,
1781 PerlIOBuf_read,
1782 PerlIOBuf_unread,
1783 PerlIOBuf_write,
1784 PerlIOBuf_seek,
1785 PerlIOBuf_tell,
1786 PerlIOBuf_close,
1787 PerlIOCede_flush,
1788 PerlIOBuf_fill,
1789 PerlIOBase_eof,
1790 PerlIOBase_error,
1791 PerlIOBase_clearerr,
1792 PerlIOBase_setlinebuf,
1793 PerlIOBuf_get_base,
1794 PerlIOBuf_bufsiz,
1795 PerlIOBuf_get_ptr,
1796 PerlIOBuf_get_cnt,
1797 PerlIOBuf_set_ptrcnt,
1798};
1799
1800
871MODULE = Coro::State PACKAGE = Coro::State 1801MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
872 1802
873PROTOTYPES: ENABLE 1803PROTOTYPES: DISABLE
874 1804
875BOOT: 1805BOOT:
876{ /* {} necessary for stoopid perl-5.6.x */ 1806{
877 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 1807#ifdef USE_ITHREADS
878 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 1808 MUTEX_INIT (&coro_lock);
1809# if CORO_PTHREAD
1810 coro_thx = PERL_GET_CONTEXT;
1811# endif
1812#endif
1813 BOOT_PAGESIZE;
1814
1815 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1816 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1817
1818 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1819 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1820 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1821
1822 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1823 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1824 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1825
879 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1826 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
880 1827
881 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1828 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
882 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1829 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
883 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1830 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
884 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1831 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
885
886 if (!padlist_cache)
887 padlist_cache = newHV ();
888 1832
889 main_mainstack = PL_mainstack; 1833 main_mainstack = PL_mainstack;
1834 main_top_env = PL_top_env;
890 1835
1836 while (main_top_env->je_prev)
1837 main_top_env = main_top_env->je_prev;
1838
891 coroapi.ver = CORO_API_VERSION; 1839 coroapi.ver = CORO_API_VERSION;
1840 coroapi.rev = CORO_API_REVISION;
892 coroapi.transfer = api_transfer; 1841 coroapi.transfer = api_transfer;
893}
894 1842
895Coro::State 1843 {
896_newprocess(args) 1844 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
897 SV * args 1845
898 PROTOTYPE: $ 1846 if (!svp) croak ("Time::HiRes is required");
1847 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
1848
1849 nvtime = INT2PTR (double (*)(), SvIV (*svp));
1850 }
1851
1852 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1853}
1854
1855SV *
1856new (char *klass, ...)
899 CODE: 1857 CODE:
900 Coro__State coro; 1858{
1859 struct coro *coro;
1860 MAGIC *mg;
1861 HV *hv;
1862 int i;
901 1863
902 if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
903 croak ("Coro::State::_newprocess expects an arrayref");
904
905 New (0, coro, 1, struct coro); 1864 Newz (0, coro, 1, struct coro);
1865 coro->args = newAV ();
1866 coro->flags = CF_NEW;
906 1867
907 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1868 if (coro_first) coro_first->prev = coro;
908 coro->mainstack = 0; /* actual work is done inside transfer */ 1869 coro->next = coro_first;
909 coro->stack = 0; 1870 coro_first = coro;
910 1871
911 RETVAL = coro; 1872 coro->hv = hv = newHV ();
1873 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1874 mg->mg_flags |= MGf_DUP;
1875 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1876
1877 av_extend (coro->args, items - 1);
1878 for (i = 1; i < items; i++)
1879 av_push (coro->args, newSVsv (ST (i)));
1880}
912 OUTPUT: 1881 OUTPUT:
913 RETVAL 1882 RETVAL
914 1883
1884# these not obviously related functions are all rolled into the same xs
1885# function to increase chances that they all will call transfer with the same
1886# stack offset
915void 1887void
916transfer(prev, next, flags) 1888_set_stacklevel (...)
917 Coro::State_or_hashref prev 1889 ALIAS:
918 Coro::State_or_hashref next 1890 Coro::State::transfer = 1
919 int flags 1891 Coro::schedule = 2
920 PROTOTYPE: @ 1892 Coro::cede = 3
1893 Coro::cede_notself = 4
921 CODE: 1894 CODE:
1895{
1896 struct transfer_args ta;
1897
922 PUTBACK; 1898 PUTBACK;
923 transfer (aTHX_ prev, next, flags); 1899 switch (ix)
1900 {
1901 case 0:
1902 ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1903 ta.next = 0;
1904 break;
1905
1906 case 1:
1907 if (items != 2)
1908 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d", items);
1909
1910 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1911 break;
1912
1913 case 2:
1914 prepare_schedule (aTHX_ &ta);
1915 break;
1916
1917 case 3:
1918 prepare_cede (aTHX_ &ta);
1919 break;
1920
1921 case 4:
1922 if (!prepare_cede_notself (aTHX_ &ta))
1923 XSRETURN_EMPTY;
1924
1925 break;
1926 }
924 SPAGAIN; 1927 SPAGAIN;
925 1928
1929 BARRIER;
1930 PUTBACK;
1931 TRANSFER (ta, 0);
1932 SPAGAIN; /* might be the sp of a different coroutine now */
1933 /* be extra careful not to ever do anything after TRANSFER */
1934}
1935
1936bool
1937_destroy (SV *coro_sv)
1938 CODE:
1939 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1940 OUTPUT:
1941 RETVAL
1942
926void 1943void
927DESTROY(coro) 1944_exit (int code)
928 Coro::State coro 1945 PROTOTYPE: $
929 CODE: 1946 CODE:
1947 _exit (code);
930 1948
931 if (coro->mainstack && coro->mainstack != main_mainstack) 1949int
1950cctx_stacksize (int new_stacksize = 0)
1951 CODE:
1952 RETVAL = cctx_stacksize;
1953 if (new_stacksize)
1954 {
1955 cctx_stacksize = new_stacksize;
1956 ++cctx_gen;
1957 }
1958 OUTPUT:
1959 RETVAL
1960
1961int
1962cctx_max_idle (int max_idle = 0)
1963 CODE:
1964 RETVAL = cctx_max_idle;
1965 if (max_idle > 1)
1966 cctx_max_idle = max_idle;
1967 OUTPUT:
1968 RETVAL
1969
1970int
1971cctx_count ()
1972 CODE:
1973 RETVAL = cctx_count;
1974 OUTPUT:
1975 RETVAL
1976
1977int
1978cctx_idle ()
1979 CODE:
1980 RETVAL = cctx_idle;
1981 OUTPUT:
1982 RETVAL
1983
1984void
1985list ()
1986 PPCODE:
1987{
1988 struct coro *coro;
1989 for (coro = coro_first; coro; coro = coro->next)
1990 if (coro->hv)
1991 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1992}
1993
1994void
1995call (Coro::State coro, SV *coderef)
1996 ALIAS:
1997 eval = 1
1998 CODE:
1999{
2000 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
932 { 2001 {
933 struct coro temp; 2002 struct coro temp;
934 2003
2004 if (!(coro->flags & CF_RUNNING))
2005 {
2006 PUTBACK;
2007 save_perl (aTHX_ &temp);
2008 load_perl (aTHX_ coro);
2009 }
2010
2011 {
2012 dSP;
2013 ENTER;
2014 SAVETMPS;
935 PUTBACK; 2015 PUTBACK;
936 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 2016 PUSHSTACK;
937 LOAD(aTHX_ coro); 2017 PUSHMARK (SP);
2018
2019 if (ix)
2020 eval_sv (coderef, 0);
2021 else
2022 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2023
2024 POPSTACK;
938 SPAGAIN; 2025 SPAGAIN;
2026 FREETMPS;
2027 LEAVE;
2028 PUTBACK;
2029 }
939 2030
940 destroy_stacks (aTHX); 2031 if (!(coro->flags & CF_RUNNING))
941 2032 {
942 LOAD((&temp)); /* this will get rid of defsv etc.. */ 2033 save_perl (aTHX_ coro);
2034 load_perl (aTHX_ &temp);
943 SPAGAIN; 2035 SPAGAIN;
944 2036 }
945 coro->mainstack = 0;
946 } 2037 }
2038}
947 2039
948 deallocate_stack (coro); 2040SV *
949 2041is_ready (Coro::State coro)
950 Safefree (coro); 2042 PROTOTYPE: $
2043 ALIAS:
2044 is_ready = CF_READY
2045 is_running = CF_RUNNING
2046 is_new = CF_NEW
2047 is_destroyed = CF_DESTROYED
2048 CODE:
2049 RETVAL = boolSV (coro->flags & ix);
2050 OUTPUT:
2051 RETVAL
951 2052
952void 2053void
953flush() 2054api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
954 CODE:
955#ifdef MAY_FLUSH
956 flush_padlist_cache ();
957#endif
958 2055
959void 2056SV *
960_exit(code) 2057has_cctx (Coro::State coro)
961 int code
962 PROTOTYPE: $ 2058 PROTOTYPE: $
963 CODE: 2059 CODE:
964#if defined(__GLIBC__) || _POSIX_C_SOURCE 2060 RETVAL = boolSV (!!coro->cctx);
965 _exit (code); 2061 OUTPUT:
966#else 2062 RETVAL
967 signal (SIGTERM, SIG_DFL);
968 raise (SIGTERM);
969 exit (code);
970#endif
971 2063
972MODULE = Coro::State PACKAGE = Coro::Cont 2064int
2065is_traced (Coro::State coro)
2066 PROTOTYPE: $
2067 CODE:
2068 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2069 OUTPUT:
2070 RETVAL
973 2071
974# this is slightly dirty (should expose a c-level api) 2072UV
2073rss (Coro::State coro)
2074 PROTOTYPE: $
2075 ALIAS:
2076 usecount = 1
2077 CODE:
2078 switch (ix)
2079 {
2080 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2081 case 1: RETVAL = coro->usecount; break;
2082 }
2083 OUTPUT:
2084 RETVAL
975 2085
976void 2086void
977yield(...) 2087force_cctx ()
2088 CODE:
2089 struct coro *coro = SvSTATE (coro_current);
2090 coro->cctx->idle_sp = 0;
2091
2092void
2093swap_defsv (Coro::State self)
978 PROTOTYPE: @ 2094 PROTOTYPE: $
2095 ALIAS:
2096 swap_defav = 1
979 CODE: 2097 CODE:
980 static SV *returnstk; 2098 if (!self->slot)
981 SV *sv; 2099 croak ("cannot swap state with coroutine that has no saved state");
982 AV *defav = GvAV (PL_defgv); 2100 else
983 struct coro *prev, *next; 2101 {
2102 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2103 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
984 2104
985 if (!returnstk) 2105 SV *tmp = *src; *src = *dst; *dst = tmp;
986 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 2106 }
987
988 /* set up @_ -- ugly */
989 av_clear (defav);
990 av_fill (defav, items - 1);
991 while (items--)
992 av_store (defav, items, SvREFCNT_inc (ST(items)));
993
994 mg_get (returnstk); /* isn't documentation wrong for mg_get? */
995 sv = av_pop ((AV *)SvRV (returnstk));
996 prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
997 next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
998 SvREFCNT_dec (sv);
999
1000 transfer(aTHX_ prev, next, 0);
1001 2107
1002MODULE = Coro::State PACKAGE = Coro 2108MODULE = Coro::State PACKAGE = Coro
1003 2109
1004# this is slightly dirty (should expose a c-level api)
1005
1006BOOT: 2110BOOT:
1007{ 2111{
1008 int i; 2112 int i;
2113
2114 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2115 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2116 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2117
2118 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2119 SvREADONLY_on (coro_current);
2120
1009 HV *stash = gv_stashpv ("Coro", TRUE); 2121 coro_stash = gv_stashpv ("Coro", TRUE);
1010 2122
1011 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2123 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1012 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2124 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1013 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2125 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1014 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2126 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1015 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2127 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1016 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2128 newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1017
1018 coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1019 coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1020 2129
1021 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2130 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1022 coro_ready[i] = newAV (); 2131 coro_ready[i] = newAV ();
1023 2132
1024 { 2133 {
1025 SV *sv = perl_get_sv("Coro::API", 1); 2134 SV *sv = perl_get_sv ("Coro::API", TRUE);
2135 perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1026 2136
1027 coroapi.schedule = api_schedule; 2137 coroapi.schedule = api_schedule;
2138 coroapi.cede = api_cede;
2139 coroapi.cede_notself = api_cede_notself;
1028 coroapi.ready = api_ready; 2140 coroapi.ready = api_ready;
2141 coroapi.is_ready = api_is_ready;
1029 coroapi.nready = &coro_nready; 2142 coroapi.nready = &coro_nready;
1030 coroapi.current = coro_current; 2143 coroapi.current = coro_current;
1031 2144
1032 GCoroAPI = &coroapi; 2145 GCoroAPI = &coroapi;
1033 sv_setiv(sv, (IV)&coroapi); 2146 sv_setiv (sv, (IV)&coroapi);
1034 SvREADONLY_on(sv); 2147 SvREADONLY_on (sv);
1035 } 2148 }
1036} 2149}
1037 2150
1038void 2151void
1039ready(self) 2152_set_current (SV *current)
1040 SV * self 2153 PROTOTYPE: $
1041 CODE: 2154 CODE:
1042 api_ready (self); 2155 SvREFCNT_dec (SvRV (coro_current));
2156 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2157
2158void
2159_set_readyhook (SV *hook)
2160 PROTOTYPE: $
2161 CODE:
2162 LOCK;
2163 SvREFCNT_dec (coro_readyhook);
2164 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2165 UNLOCK;
1043 2166
1044int 2167int
2168prio (Coro::State coro, int newprio = 0)
2169 ALIAS:
2170 nice = 1
2171 CODE:
2172{
2173 RETVAL = coro->prio;
2174
2175 if (items > 1)
2176 {
2177 if (ix)
2178 newprio = coro->prio - newprio;
2179
2180 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2181 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2182
2183 coro->prio = newprio;
2184 }
2185}
2186 OUTPUT:
2187 RETVAL
2188
2189SV *
2190ready (SV *self)
2191 PROTOTYPE: $
2192 CODE:
2193 RETVAL = boolSV (api_ready (self));
2194 OUTPUT:
2195 RETVAL
2196
2197int
1045nready(...) 2198nready (...)
1046 PROTOTYPE: 2199 PROTOTYPE:
1047 CODE: 2200 CODE:
1048 RETVAL = coro_nready; 2201 RETVAL = coro_nready;
1049 OUTPUT: 2202 OUTPUT:
1050 RETVAL 2203 RETVAL
1051 2204
1052void 2205void
1053schedule(...) 2206throw (Coro::State self, SV *throw = &PL_sv_undef)
1054 PROTOTYPE: 2207 PROTOTYPE: $;$
1055 ALIAS: 2208 CODE:
1056 cede = 1 2209 SvREFCNT_dec (self->throw);
2210 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
2211
2212# for async_pool speedup
2213void
2214_pool_1 (SV *cb)
1057 CODE: 2215 CODE:
1058 api_schedule (ix); 2216{
2217 struct coro *coro = SvSTATE (coro_current);
2218 HV *hv = (HV *)SvRV (coro_current);
2219 AV *defav = GvAV (PL_defgv);
2220 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2221 AV *invoke_av;
2222 int i, len;
1059 2223
2224 if (!invoke)
2225 {
2226 SV *old = PL_diehook;
2227 PL_diehook = 0;
2228 SvREFCNT_dec (old);
2229 croak ("\3async_pool terminate\2\n");
2230 }
2231
2232 SvREFCNT_dec (coro->saved_deffh);
2233 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2234
2235 hv_store (hv, "desc", sizeof ("desc") - 1,
2236 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2237
2238 invoke_av = (AV *)SvRV (invoke);
2239 len = av_len (invoke_av);
2240
2241 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2242
2243 if (len > 0)
2244 {
2245 av_fill (defav, len - 1);
2246 for (i = 0; i < len; ++i)
2247 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2248 }
2249
2250 SvREFCNT_dec (invoke);
2251}
2252
2253void
2254_pool_2 (SV *cb)
2255 CODE:
2256{
2257 struct coro *coro = SvSTATE (coro_current);
2258
2259 sv_setsv (cb, &PL_sv_undef);
2260
2261 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2262 coro->saved_deffh = 0;
2263
2264 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2265 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2266 {
2267 SV *old = PL_diehook;
2268 PL_diehook = 0;
2269 SvREFCNT_dec (old);
2270 croak ("\3async_pool terminate\2\n");
2271 }
2272
2273 av_clear (GvAV (PL_defgv));
2274 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2275 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2276
2277 coro->prio = 0;
2278
2279 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2280 api_trace (coro_current, 0);
2281
2282 av_push (av_async_pool, newSVsv (coro_current));
2283}
2284
2285#if 0
2286
2287void
2288_generator_call (...)
2289 PROTOTYPE: @
2290 PPCODE:
2291 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2292 xxxx
2293 abort ();
2294
2295SV *
2296gensub (SV *sub, ...)
2297 PROTOTYPE: &;@
2298 CODE:
2299{
2300 struct coro *coro;
2301 MAGIC *mg;
2302 CV *xcv;
2303 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2304 int i;
2305
2306 CvGV (ncv) = CvGV (cv);
2307 CvFILE (ncv) = CvFILE (cv);
2308
2309 Newz (0, coro, 1, struct coro);
2310 coro->args = newAV ();
2311 coro->flags = CF_NEW;
2312
2313 av_extend (coro->args, items - 1);
2314 for (i = 1; i < items; i++)
2315 av_push (coro->args, newSVsv (ST (i)));
2316
2317 CvISXSUB_on (ncv);
2318 CvXSUBANY (ncv).any_ptr = (void *)coro;
2319
2320 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2321
2322 CvXSUB (ncv) = CvXSUB (xcv);
2323 CvANON_on (ncv);
2324
2325 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2326 RETVAL = newRV_noinc ((SV *)ncv);
2327}
2328 OUTPUT:
2329 RETVAL
2330
2331#endif
2332
2333
2334MODULE = Coro::State PACKAGE = Coro::AIO
2335
2336void
2337_get_state (SV *self)
2338 PPCODE:
2339{
2340 AV *defav = GvAV (PL_defgv);
2341 AV *av = newAV ();
2342 int i;
2343 SV *data_sv = newSV (sizeof (struct io_state));
2344 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2345 SvCUR_set (data_sv, sizeof (struct io_state));
2346 SvPOK_only (data_sv);
2347
2348 data->errorno = errno;
2349 data->laststype = PL_laststype;
2350 data->laststatval = PL_laststatval;
2351 data->statcache = PL_statcache;
2352
2353 av_extend (av, AvFILLp (defav) + 1 + 1);
2354
2355 for (i = 0; i <= AvFILLp (defav); ++i)
2356 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2357
2358 av_push (av, data_sv);
2359
2360 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2361
2362 api_ready (self);
2363}
2364
2365void
2366_set_state (SV *state)
2367 PROTOTYPE: $
2368 PPCODE:
2369{
2370 AV *av = (AV *)SvRV (state);
2371 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2372 int i;
2373
2374 errno = data->errorno;
2375 PL_laststype = data->laststype;
2376 PL_laststatval = data->laststatval;
2377 PL_statcache = data->statcache;
2378
2379 EXTEND (SP, AvFILLp (av));
2380 for (i = 0; i < AvFILLp (av); ++i)
2381 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2382}
2383
2384
2385MODULE = Coro::State PACKAGE = Coro::AnyEvent
2386
2387BOOT:
2388 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2389
2390SV *
2391_schedule (...)
2392 PROTOTYPE: @
2393 CODE:
2394{
2395 static int incede;
2396
2397 api_cede_notself ();
2398
2399 ++incede;
2400 while (coro_nready >= incede && api_cede ())
2401 ;
2402
2403 sv_setsv (sv_activity, &PL_sv_undef);
2404 if (coro_nready >= incede)
2405 {
2406 PUSHMARK (SP);
2407 PUTBACK;
2408 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2409 SPAGAIN;
2410 }
2411
2412 --incede;
2413}
2414
2415
2416MODULE = Coro::State PACKAGE = PerlIO::cede
2417
2418BOOT:
2419 PerlIO_define_layer (aTHX_ &PerlIO_cede);

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines