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Comparing Coro/Coro/State.xs (file contents):
Revision 1.30 by root, Sat Aug 25 22:19:05 2001 UTC vs.
Revision 1.256 by root, Sat Nov 8 13:32:18 2008 UTC

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

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