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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 1.263 by root, Wed Nov 12 04:49:06 2008 UTC

1#include "libcoro/coro.c"
2
3#define PERL_NO_GET_CONTEXT
4#define PERL_EXT
5
1#include "EXTERN.h" 6#include "EXTERN.h"
2#include "perl.h" 7#include "perl.h"
3#include "XSUB.h" 8#include "XSUB.h"
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#endif
22 52
23#define SUB_INIT "Coro::State::initialize" 53/* the maximum number of idle cctx that will be pooled */
24#define UCORO_STATE "_coro_state" 54static int cctx_max_idle = 4;
25 55
26/* The next macro should declare a variable stacklevel that contains and approximation 56#define PERL_VERSION_ATLEAST(a,b,c) \
27 * to the current C stack pointer. Its property is that it changes with each call 57 (PERL_REVISION > (a) \
28 * and should be unique. */ 58 || (PERL_REVISION == (a) \
59 && (PERL_VERSION > (b) \
60 || (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
61
62#if !PERL_VERSION_ATLEAST (5,6,0)
63# ifndef PL_ppaddr
64# define PL_ppaddr ppaddr
65# endif
66# ifndef call_sv
67# define call_sv perl_call_sv
68# endif
69# ifndef get_sv
70# define get_sv perl_get_sv
71# endif
72# ifndef get_cv
73# define get_cv perl_get_cv
74# endif
75# ifndef IS_PADGV
76# define IS_PADGV(v) 0
77# endif
78# ifndef IS_PADCONST
79# define IS_PADCONST(v) 0
80# endif
81#endif
82
83/* 5.11 */
84#ifndef CxHASARGS
85# define CxHASARGS(cx) (cx)->blk_sub.hasargs
86#endif
87
88/* 5.10.0 */
89#ifndef SvREFCNT_inc_NN
90# define SvREFCNT_inc_NN(sv) SvREFCNT_inc (sv)
91#endif
92
93/* 5.8.8 */
94#ifndef GV_NOTQUAL
95# define GV_NOTQUAL 0
96#endif
97#ifndef newSV
98# define newSV(l) NEWSV(0,l)
99#endif
100
101/* 5.8.7 */
102#ifndef SvRV_set
103# define SvRV_set(s,v) SvRV(s) = (v)
104#endif
105
106#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
107# undef CORO_STACKGUARD
108#endif
109
110#ifndef CORO_STACKGUARD
111# define CORO_STACKGUARD 0
112#endif
113
114/* prefer perl internal functions over our own? */
115#ifndef CORO_PREFER_PERL_FUNCTIONS
116# define CORO_PREFER_PERL_FUNCTIONS 0
117#endif
118
119/* The next macros try to return the current stack pointer, in an as
120 * portable way as possible. */
121#define dSTACKLEVEL volatile char stacklevel
29#define dSTACKLEVEL void *stacklevel = &stacklevel 122#define STACKLEVEL ((void *)&stacklevel)
30 123
31#define labs(l) ((l) >= 0 ? (l) : -(l)) 124#define IN_DESTRUCT (PL_main_cv == Nullcv)
125
126#if __GNUC__ >= 3
127# define attribute(x) __attribute__(x)
128# define BARRIER __asm__ __volatile__ ("" : : : "memory")
129# define expect(expr,value) __builtin_expect ((expr),(value))
130# define INLINE static inline
131#else
132# define attribute(x)
133# define BARRIER
134# define expect(expr,value) (expr)
135# define INLINE static
136#endif
137
138#define expect_false(expr) expect ((expr) != 0, 0)
139#define expect_true(expr) expect ((expr) != 0, 1)
140
141#define NOINLINE attribute ((noinline))
32 142
33#include "CoroAPI.h" 143#include "CoroAPI.h"
34 144
145#ifdef USE_ITHREADS
146
147static perl_mutex coro_lock;
148# define LOCK do { MUTEX_LOCK (&coro_lock); } while (0)
149# define UNLOCK do { MUTEX_UNLOCK (&coro_lock); } while (0)
150# if CORO_PTHREAD
151static void *coro_thx;
152# endif
153
154#else
155
156# define LOCK (void)0
157# define UNLOCK (void)0
158
159#endif
160
161# undef LOCK
162# define LOCK (void)0
163# undef UNLOCK
164# define UNLOCK (void)0
165
166/* helper storage struct for Coro::AIO */
167struct io_state
168{
169 AV *res;
170 int errorno;
171 I32 laststype; /* U16 in 5.10.0 */
172 int laststatval;
173 Stat_t statcache;
174};
175
176static double (*nvtime)(); /* so why doesn't it take void? */
177
178static U32 cctx_gen;
179static size_t cctx_stacksize = CORO_STACKSIZE;
35static struct CoroAPI coroapi; 180static struct CoroAPI coroapi;
181static AV *main_mainstack; /* used to differentiate between $main and others */
182static JMPENV *main_top_env;
183static HV *coro_state_stash, *coro_stash;
184static volatile SV *coro_mortal; /* will be freed/thrown after next transfer */
185static volatile struct coro *transfer_next;
36 186
37/* this is actually not only the c stack but also c registers etc... */ 187struct transfer_args
188{
189 struct coro *prev, *next;
190};
191
192static GV *irsgv; /* $/ */
193static GV *stdoutgv; /* *STDOUT */
194static SV *rv_diehook;
195static SV *rv_warnhook;
196static HV *hv_sig; /* %SIG */
197
198/* async_pool helper stuff */
199static SV *sv_pool_rss;
200static SV *sv_pool_size;
201static AV *av_async_pool;
202
203/* Coro::AnyEvent */
204static SV *sv_activity;
205
206static struct coro_cctx *cctx_first;
207static int cctx_count, cctx_idle;
208
209enum {
210 CC_MAPPED = 0x01,
211 CC_NOREUSE = 0x02, /* throw this away after tracing */
212 CC_TRACE = 0x04,
213 CC_TRACE_SUB = 0x08, /* trace sub calls */
214 CC_TRACE_LINE = 0x10, /* trace each statement */
215 CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
216};
217
218/* this is a structure representing a c-level coroutine */
219typedef struct coro_cctx {
220 struct coro_cctx *next;
221
222 /* the stack */
223 void *sptr;
224 size_t ssize;
225
226 /* cpu state */
227 void *idle_sp; /* sp of top-level transfer/schedule/cede call */
228 JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
229 JMPENV *top_env;
230 coro_context cctx;
231
232 U32 gen;
233#if CORO_USE_VALGRIND
234 int valgrind_id;
235#endif
236 unsigned char flags;
237} coro_cctx;
238
239enum {
240 CF_RUNNING = 0x0001, /* coroutine is running */
241 CF_READY = 0x0002, /* coroutine is ready */
242 CF_NEW = 0x0004, /* has never been switched to */
243 CF_DESTROYED = 0x0008, /* coroutine data has been freed */
244};
245
246/* the structure where most of the perl state is stored, overlaid on the cxstack */
38typedef struct { 247typedef struct {
39 int refcnt; /* pointer reference counter */ 248 SV *defsv;
40 int usecnt; /* shared by how many coroutines */ 249 AV *defav;
41 int gencnt; /* generation counter */ 250 SV *errsv;
251 SV *irsgv;
252#define VAR(name,type) type name;
253# include "state.h"
254#undef VAR
255} perl_slots;
42 256
43 coro_context cctx; 257#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
44 258
45 void *sptr; 259/* this is a structure representing a perl-level coroutine */
46 long ssize; /* positive == mmap, otherwise malloc */
47} coro_stack;
48
49struct coro { 260struct coro {
50 /* the optional C context */ 261 /* the c coroutine allocated to this perl coroutine, if any */
51 coro_stack *stack; 262 coro_cctx *cctx;
52 void *cursp;
53 int gencnt;
54 263
55 /* optionally saved, might be zero */ 264 /* 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; 265 AV *mainstack;
68 SV **stack_sp; 266 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;
91 267
92 /* data associated with this coroutine (initial args) */ 268 AV *args; /* data associated with this coroutine (initial args) */
93 AV *args; 269 int refcnt; /* coroutines are refcounted, yes */
270 int flags; /* CF_ flags */
271 HV *hv; /* the perl hash associated with this coro, if any */
272
273 /* statistics */
274 int usecount; /* number of transfers to this coro */
275
276 /* coro process data */
277 int prio;
278 SV *throw; /* exception to be thrown */
279
280 /* async_pool */
281 SV *saved_deffh;
282
283 /* linked list */
284 struct coro *next, *prev;
94}; 285};
95 286
96typedef struct coro *Coro__State; 287typedef struct coro *Coro__State;
97typedef struct coro *Coro__State_or_hashref; 288typedef 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}
775 289
776/** Coro ********************************************************************/ 290/** Coro ********************************************************************/
777 291
778#define PRIO_MAX 3 292#define PRIO_MAX 3
779#define PRIO_HIGH 1 293#define PRIO_HIGH 1
… …
781#define PRIO_LOW -1 295#define PRIO_LOW -1
782#define PRIO_IDLE -3 296#define PRIO_IDLE -3
783#define PRIO_MIN -4 297#define PRIO_MIN -4
784 298
785/* for Coro.pm */ 299/* for Coro.pm */
786static GV *coro_current, *coro_idle; 300static SV *coro_current;
301static SV *coro_readyhook;
787static AV *coro_ready[PRIO_MAX-PRIO_MIN+1]; 302static AV *coro_ready [PRIO_MAX - PRIO_MIN + 1];
788static int coro_nready; 303static int coro_nready;
304static struct coro *coro_first;
305
306/** lowlevel stuff **********************************************************/
307
308static SV *
309coro_get_sv (pTHX_ const char *name, int create)
310{
311#if PERL_VERSION_ATLEAST (5,10,0)
312 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
313 get_sv (name, create);
314#endif
315 return get_sv (name, create);
316}
317
318static AV *
319coro_get_av (pTHX_ const char *name, int create)
320{
321#if PERL_VERSION_ATLEAST (5,10,0)
322 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
323 get_av (name, create);
324#endif
325 return get_av (name, create);
326}
327
328static HV *
329coro_get_hv (pTHX_ const char *name, int create)
330{
331#if PERL_VERSION_ATLEAST (5,10,0)
332 /* silence stupid and wrong 5.10 warning that I am unable to switch off */
333 get_hv (name, create);
334#endif
335 return get_hv (name, create);
336}
337
338static AV *
339coro_clone_padlist (pTHX_ CV *cv)
340{
341 AV *padlist = CvPADLIST (cv);
342 AV *newpadlist, *newpad;
343
344 newpadlist = newAV ();
345 AvREAL_off (newpadlist);
346#if PERL_VERSION_ATLEAST (5,10,0)
347 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
348#else
349 Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
350#endif
351 newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
352 --AvFILLp (padlist);
353
354 av_store (newpadlist, 0, SvREFCNT_inc_NN (*av_fetch (padlist, 0, FALSE)));
355 av_store (newpadlist, 1, (SV *)newpad);
356
357 return newpadlist;
358}
789 359
790static void 360static void
791coro_enq (SV *sv) 361free_padlist (pTHX_ AV *padlist)
792{ 362{
793 if (SvROK (sv)) 363 /* may be during global destruction */
364 if (SvREFCNT (padlist))
794 { 365 {
795 SV *hv = SvRV (sv); 366 I32 i = AvFILLp (padlist);
796 if (SvTYPE (hv) == SVt_PVHV) 367 while (i >= 0)
797 { 368 {
798 SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0); 369 SV **svp = av_fetch (padlist, i--, FALSE);
799 int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL; 370 if (svp)
371 {
372 SV *sv;
373 while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
374 SvREFCNT_dec (sv);
800 375
801 prio = prio > PRIO_MAX ? PRIO_MAX 376 SvREFCNT_dec (*svp);
802 : prio < PRIO_MIN ? PRIO_MIN 377 }
803 : prio;
804
805 av_push (coro_ready [prio - PRIO_MIN], sv);
806 coro_nready++;
807
808 return;
809 } 378 }
379
380 SvREFCNT_dec ((SV*)padlist);
381 }
382}
383
384static int
385coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
386{
387 AV *padlist;
388 AV *av = (AV *)mg->mg_obj;
389
390 /* casting is fun. */
391 while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
392 free_padlist (aTHX_ padlist);
393
394 SvREFCNT_dec (av); /* sv_magicext increased the refcount */
395
396 return 0;
397}
398
399#define CORO_MAGIC_type_cv PERL_MAGIC_ext
400#define CORO_MAGIC_type_state PERL_MAGIC_ext
401
402static MGVTBL coro_cv_vtbl = {
403 0, 0, 0, 0,
404 coro_cv_free
405};
406
407#define CORO_MAGIC(sv, type) \
408 SvMAGIC (sv) \
409 ? SvMAGIC (sv)->mg_type == type \
410 ? SvMAGIC (sv) \
411 : mg_find (sv, type) \
412 : 0
413
414#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
415#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
416
417INLINE struct coro *
418SvSTATE_ (pTHX_ SV *coro)
419{
420 HV *stash;
421 MAGIC *mg;
422
423 if (SvROK (coro))
424 coro = SvRV (coro);
425
426 if (expect_false (SvTYPE (coro) != SVt_PVHV))
427 croak ("Coro::State object required");
428
429 stash = SvSTASH (coro);
430 if (expect_false (stash != coro_stash && stash != coro_state_stash))
431 {
432 /* very slow, but rare, check */
433 if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
434 croak ("Coro::State object required");
435 }
436
437 mg = CORO_MAGIC_state (coro);
438 return (struct coro *)mg->mg_ptr;
439}
440
441#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
442
443/* the next two functions merely cache the padlists */
444static void
445get_padlist (pTHX_ CV *cv)
446{
447 MAGIC *mg = CORO_MAGIC_cv (cv);
448 AV *av;
449
450 if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
451 CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
452 else
453 {
454#if CORO_PREFER_PERL_FUNCTIONS
455 /* this is probably cleaner? but also slower! */
456 /* in practise, it seems to be less stable */
457 CV *cp = Perl_cv_clone (cv);
458 CvPADLIST (cv) = CvPADLIST (cp);
459 CvPADLIST (cp) = 0;
460 SvREFCNT_dec (cp);
461#else
462 CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
463#endif
810 } 464 }
465}
811 466
812 croak ("Coro::ready tried to enqueue something that is not a coroutine"); 467static void
468put_padlist (pTHX_ CV *cv)
469{
470 MAGIC *mg = CORO_MAGIC_cv (cv);
471 AV *av;
472
473 if (expect_false (!mg))
474 mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
475
476 av = (AV *)mg->mg_obj;
477
478 if (expect_false (AvFILLp (av) >= AvMAX (av)))
479 av_extend (av, AvMAX (av) + 1);
480
481 AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
482}
483
484/** load & save, init *******************************************************/
485
486static void
487load_perl (pTHX_ Coro__State c)
488{
489 perl_slots *slot = c->slot;
490 c->slot = 0;
491
492 PL_mainstack = c->mainstack;
493
494 GvSV (PL_defgv) = slot->defsv;
495 GvAV (PL_defgv) = slot->defav;
496 GvSV (PL_errgv) = slot->errsv;
497 GvSV (irsgv) = slot->irsgv;
498
499 #define VAR(name,type) PL_ ## name = slot->name;
500 # include "state.h"
501 #undef VAR
502
503 {
504 dSP;
505
506 CV *cv;
507
508 /* now do the ugly restore mess */
509 while (expect_true (cv = (CV *)POPs))
510 {
511 put_padlist (aTHX_ cv); /* mark this padlist as available */
512 CvDEPTH (cv) = PTR2IV (POPs);
513 CvPADLIST (cv) = (AV *)POPs;
514 }
515
516 PUTBACK;
517 }
518}
519
520static void
521save_perl (pTHX_ Coro__State c)
522{
523 {
524 dSP;
525 I32 cxix = cxstack_ix;
526 PERL_CONTEXT *ccstk = cxstack;
527 PERL_SI *top_si = PL_curstackinfo;
528
529 /*
530 * the worst thing you can imagine happens first - we have to save
531 * (and reinitialize) all cv's in the whole callchain :(
532 */
533
534 XPUSHs (Nullsv);
535 /* this loop was inspired by pp_caller */
536 for (;;)
537 {
538 while (expect_true (cxix >= 0))
539 {
540 PERL_CONTEXT *cx = &ccstk[cxix--];
541
542 if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
543 {
544 CV *cv = cx->blk_sub.cv;
545
546 if (expect_true (CvDEPTH (cv)))
547 {
548 EXTEND (SP, 3);
549 PUSHs ((SV *)CvPADLIST (cv));
550 PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
551 PUSHs ((SV *)cv);
552
553 CvDEPTH (cv) = 0;
554 get_padlist (aTHX_ cv);
555 }
556 }
557 }
558
559 if (expect_true (top_si->si_type == PERLSI_MAIN))
560 break;
561
562 top_si = top_si->si_prev;
563 ccstk = top_si->si_cxstack;
564 cxix = top_si->si_cxix;
565 }
566
567 PUTBACK;
568 }
569
570 /* allocate some space on the context stack for our purposes */
571 /* we manually unroll here, as usually 2 slots is enough */
572 if (SLOT_COUNT >= 1) CXINC;
573 if (SLOT_COUNT >= 2) CXINC;
574 if (SLOT_COUNT >= 3) CXINC;
575 {
576 int i;
577 for (i = 3; i < SLOT_COUNT; ++i)
578 CXINC;
579 }
580 cxstack_ix -= SLOT_COUNT; /* undo allocation */
581
582 c->mainstack = PL_mainstack;
583
584 {
585 perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
586
587 slot->defav = GvAV (PL_defgv);
588 slot->defsv = DEFSV;
589 slot->errsv = ERRSV;
590 slot->irsgv = GvSV (irsgv);
591
592 #define VAR(name,type) slot->name = PL_ ## name;
593 # include "state.h"
594 #undef VAR
595 }
596}
597
598/*
599 * allocate various perl stacks. This is an exact copy
600 * of perl.c:init_stacks, except that it uses less memory
601 * on the (sometimes correct) assumption that coroutines do
602 * not usually need a lot of stackspace.
603 */
604#if CORO_PREFER_PERL_FUNCTIONS
605# define coro_init_stacks init_stacks
606#else
607static void
608coro_init_stacks (pTHX)
609{
610 PL_curstackinfo = new_stackinfo(32, 8);
611 PL_curstackinfo->si_type = PERLSI_MAIN;
612 PL_curstack = PL_curstackinfo->si_stack;
613 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
614
615 PL_stack_base = AvARRAY(PL_curstack);
616 PL_stack_sp = PL_stack_base;
617 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
618
619 New(50,PL_tmps_stack,32,SV*);
620 PL_tmps_floor = -1;
621 PL_tmps_ix = -1;
622 PL_tmps_max = 32;
623
624 New(54,PL_markstack,16,I32);
625 PL_markstack_ptr = PL_markstack;
626 PL_markstack_max = PL_markstack + 16;
627
628#ifdef SET_MARK_OFFSET
629 SET_MARK_OFFSET;
630#endif
631
632 New(54,PL_scopestack,8,I32);
633 PL_scopestack_ix = 0;
634 PL_scopestack_max = 8;
635
636 New(54,PL_savestack,24,ANY);
637 PL_savestack_ix = 0;
638 PL_savestack_max = 24;
639
640#if !PERL_VERSION_ATLEAST (5,10,0)
641 New(54,PL_retstack,4,OP*);
642 PL_retstack_ix = 0;
643 PL_retstack_max = 4;
644#endif
645}
646#endif
647
648/*
649 * destroy the stacks, the callchain etc...
650 */
651static void
652coro_destruct_stacks (pTHX)
653{
654 while (PL_curstackinfo->si_next)
655 PL_curstackinfo = PL_curstackinfo->si_next;
656
657 while (PL_curstackinfo)
658 {
659 PERL_SI *p = PL_curstackinfo->si_prev;
660
661 if (!IN_DESTRUCT)
662 SvREFCNT_dec (PL_curstackinfo->si_stack);
663
664 Safefree (PL_curstackinfo->si_cxstack);
665 Safefree (PL_curstackinfo);
666 PL_curstackinfo = p;
667 }
668
669 Safefree (PL_tmps_stack);
670 Safefree (PL_markstack);
671 Safefree (PL_scopestack);
672 Safefree (PL_savestack);
673#if !PERL_VERSION_ATLEAST (5,10,0)
674 Safefree (PL_retstack);
675#endif
676}
677
678static size_t
679coro_rss (pTHX_ struct coro *coro)
680{
681 size_t rss = sizeof (*coro);
682
683 if (coro->mainstack)
684 {
685 perl_slots tmp_slot;
686 perl_slots *slot;
687
688 if (coro->flags & CF_RUNNING)
689 {
690 slot = &tmp_slot;
691
692 #define VAR(name,type) slot->name = PL_ ## name;
693 # include "state.h"
694 #undef VAR
695 }
696 else
697 slot = coro->slot;
698
699 if (slot)
700 {
701 rss += sizeof (slot->curstackinfo);
702 rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
703 rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
704 rss += slot->tmps_max * sizeof (SV *);
705 rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
706 rss += slot->scopestack_max * sizeof (I32);
707 rss += slot->savestack_max * sizeof (ANY);
708
709#if !PERL_VERSION_ATLEAST (5,10,0)
710 rss += slot->retstack_max * sizeof (OP *);
711#endif
712 }
713 }
714
715 return rss;
716}
717
718/** coroutine stack handling ************************************************/
719
720static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
721static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
722static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
723
724/* apparently < 5.8.8 */
725#ifndef MgPV_nolen_const
726#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
727 SvPV_nolen((SV*)((mg)->mg_ptr)) : \
728 (const char*)(mg)->mg_ptr)
729#endif
730
731/* we sometimes need to create the effect of entersub calling us */
732#define ENTERSUB_HEAD ENTER; SAVETMPS
733/* we somtimes need to create the effect of leaving via entersub */
734#define ENTERSUB_TAIL LEAVE
735
736/*
737 * This overrides the default magic get method of %SIG elements.
738 * The original one doesn't provide for reading back of PL_diehook/PL_warnhook
739 * and instead of tryign to save and restore the hash elements, we just provide
740 * readback here.
741 * We only do this when the hook is != 0, as they are often set to 0 temporarily,
742 * not expecting this to actually change the hook. This is a potential problem
743 * when a schedule happens then, but we ignore this.
744 */
745static int
746coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
747{
748 const char *s = MgPV_nolen_const (mg);
749
750 if (*s == '_')
751 {
752 SV **svp = 0;
753
754 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
755 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
756
757 if (svp)
758 {
759 sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
760 return 0;
761 }
762 }
763
764 return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
765}
766
767static int
768coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
769{
770 const char *s = MgPV_nolen_const (mg);
771
772 if (*s == '_')
773 {
774 SV **svp = 0;
775
776 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
777 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
778
779 if (svp)
780 {
781 SV *old = *svp;
782 *svp = 0;
783 SvREFCNT_dec (old);
784 return 0;
785 }
786 }
787
788 return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
789}
790
791static int
792coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
793{
794 const char *s = MgPV_nolen_const (mg);
795
796 if (*s == '_')
797 {
798 SV **svp = 0;
799
800 if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
801 if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
802
803 if (svp)
804 {
805 SV *old = *svp;
806 *svp = newSVsv (sv);
807 SvREFCNT_dec (old);
808 return 0;
809 }
810 }
811
812 return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
813}
814
815static void
816coro_setup (pTHX_ struct coro *coro)
817{
818 /*
819 * emulate part of the perl startup here.
820 */
821 coro_init_stacks (aTHX);
822
823 PL_runops = RUNOPS_DEFAULT;
824 PL_curcop = &PL_compiling;
825 PL_in_eval = EVAL_NULL;
826 PL_comppad = 0;
827 PL_curpm = 0;
828 PL_curpad = 0;
829 PL_localizing = 0;
830 PL_dirty = 0;
831 PL_restartop = 0;
832#if PERL_VERSION_ATLEAST (5,10,0)
833 PL_parser = 0;
834#endif
835
836 /* recreate the die/warn hooks */
837 PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
838 PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
839
840 GvSV (PL_defgv) = newSV (0);
841 GvAV (PL_defgv) = coro->args; coro->args = 0;
842 GvSV (PL_errgv) = newSV (0);
843 GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
844 PL_rs = newSVsv (GvSV (irsgv));
845 PL_defoutgv = (GV *)SvREFCNT_inc_NN (stdoutgv);
846
847 {
848 dSP;
849 UNOP myop;
850
851 Zero (&myop, 1, UNOP);
852 myop.op_next = Nullop;
853 myop.op_flags = OPf_WANT_VOID;
854
855 PUSHMARK (SP);
856 XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
857 PUTBACK;
858 PL_op = (OP *)&myop;
859 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
860 SPAGAIN;
861 }
862
863 /* this newly created coroutine might be run on an existing cctx which most
864 * likely was suspended in set_stacklevel, called from entersub.
865 * set_stacklevel doesn't do anything on return, but entersub does LEAVE,
866 * so we ENTER here for symmetry.
867 */
868 ENTERSUB_HEAD;
869}
870
871static void
872coro_destruct (pTHX_ struct coro *coro)
873{
874 if (!IN_DESTRUCT)
875 {
876 /* restore all saved variables and stuff */
877 LEAVE_SCOPE (0);
878 assert (PL_tmps_floor == -1);
879
880 /* free all temporaries */
881 FREETMPS;
882 assert (PL_tmps_ix == -1);
883
884 /* unwind all extra stacks */
885 POPSTACK_TO (PL_mainstack);
886
887 /* unwind main stack */
888 dounwind (-1);
889 }
890
891 SvREFCNT_dec (GvSV (PL_defgv));
892 SvREFCNT_dec (GvAV (PL_defgv));
893 SvREFCNT_dec (GvSV (PL_errgv));
894 SvREFCNT_dec (PL_defoutgv);
895 SvREFCNT_dec (PL_rs);
896 SvREFCNT_dec (GvSV (irsgv));
897
898 SvREFCNT_dec (PL_diehook);
899 SvREFCNT_dec (PL_warnhook);
900
901 SvREFCNT_dec (coro->saved_deffh);
902 SvREFCNT_dec (coro->throw);
903
904 coro_destruct_stacks (aTHX);
905}
906
907INLINE void
908free_coro_mortal (pTHX)
909{
910 if (expect_true (coro_mortal))
911 {
912 SvREFCNT_dec (coro_mortal);
913 coro_mortal = 0;
914 }
915}
916
917static int
918runops_trace (pTHX)
919{
920 COP *oldcop = 0;
921 int oldcxix = -2;
922 struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
923 coro_cctx *cctx = coro->cctx;
924
925 while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
926 {
927 PERL_ASYNC_CHECK ();
928
929 if (cctx->flags & CC_TRACE_ALL)
930 {
931 if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
932 {
933 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
934 SV **bot, **top;
935 AV *av = newAV (); /* return values */
936 SV **cb;
937 dSP;
938
939 GV *gv = CvGV (cx->blk_sub.cv);
940 SV *fullname = sv_2mortal (newSV (0));
941 if (isGV (gv))
942 gv_efullname3 (fullname, gv, 0);
943
944 bot = PL_stack_base + cx->blk_oldsp + 1;
945 top = cx->blk_gimme == G_ARRAY ? SP + 1
946 : cx->blk_gimme == G_SCALAR ? bot + 1
947 : bot;
948
949 av_extend (av, top - bot);
950 while (bot < top)
951 av_push (av, SvREFCNT_inc_NN (*bot++));
952
953 PL_runops = RUNOPS_DEFAULT;
954 ENTER;
955 SAVETMPS;
956 EXTEND (SP, 3);
957 PUSHMARK (SP);
958 PUSHs (&PL_sv_no);
959 PUSHs (fullname);
960 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
961 PUTBACK;
962 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
963 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
964 SPAGAIN;
965 FREETMPS;
966 LEAVE;
967 PL_runops = runops_trace;
968 }
969
970 if (oldcop != PL_curcop)
971 {
972 oldcop = PL_curcop;
973
974 if (PL_curcop != &PL_compiling)
975 {
976 SV **cb;
977
978 if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
979 {
980 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
981
982 if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
983 {
984 runops_proc_t old_runops = PL_runops;
985 dSP;
986 GV *gv = CvGV (cx->blk_sub.cv);
987 SV *fullname = sv_2mortal (newSV (0));
988
989 if (isGV (gv))
990 gv_efullname3 (fullname, gv, 0);
991
992 PL_runops = RUNOPS_DEFAULT;
993 ENTER;
994 SAVETMPS;
995 EXTEND (SP, 3);
996 PUSHMARK (SP);
997 PUSHs (&PL_sv_yes);
998 PUSHs (fullname);
999 PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
1000 PUTBACK;
1001 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
1002 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1003 SPAGAIN;
1004 FREETMPS;
1005 LEAVE;
1006 PL_runops = runops_trace;
1007 }
1008
1009 oldcxix = cxstack_ix;
1010 }
1011
1012 if (cctx->flags & CC_TRACE_LINE)
1013 {
1014 dSP;
1015
1016 PL_runops = RUNOPS_DEFAULT;
1017 ENTER;
1018 SAVETMPS;
1019 EXTEND (SP, 3);
1020 PL_runops = RUNOPS_DEFAULT;
1021 PUSHMARK (SP);
1022 PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
1023 PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
1024 PUTBACK;
1025 cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
1026 if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
1027 SPAGAIN;
1028 FREETMPS;
1029 LEAVE;
1030 PL_runops = runops_trace;
1031 }
1032 }
1033 }
1034 }
1035 }
1036
1037 TAINT_NOT;
1038 return 0;
1039}
1040
1041static void
1042prepare_set_stacklevel (struct transfer_args *ta, struct coro_cctx *cctx)
1043{
1044 ta->prev = (struct coro *)cctx;
1045 ta->next = 0;
1046}
1047
1048/* inject a fake call to Coro::State::_cctx_init into the execution */
1049/* _cctx_init should be careful, as it could be called at almost any time */
1050/* during execution of a perl program */
1051/* also initialises PL_top_env */
1052static void NOINLINE
1053cctx_prepare (pTHX_ coro_cctx *cctx)
1054{
1055 dSP;
1056 UNOP myop;
1057
1058 PL_top_env = &PL_start_env;
1059
1060 if (cctx->flags & CC_TRACE)
1061 PL_runops = runops_trace;
1062
1063 Zero (&myop, 1, UNOP);
1064 myop.op_next = PL_op;
1065 myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
1066
1067 PUSHMARK (SP);
1068 EXTEND (SP, 2);
1069 PUSHs (sv_2mortal (newSViv ((IV)cctx)));
1070 PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
1071 PUTBACK;
1072 PL_op = (OP *)&myop;
1073 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
1074 SPAGAIN;
1075}
1076
1077/* the tail of transfer: execute stuff we can only do after a transfer */
1078INLINE void
1079transfer_tail (pTHX)
1080{
1081 struct coro *next = (struct coro *)transfer_next;
1082 assert (!(transfer_next = 0)); /* just used for the side effect when asserts are enabled */
1083 assert (("FATAL: transfer_next was zero in transfer_tail (please report)", next));
1084
1085 free_coro_mortal (aTHX);
1086 UNLOCK;
1087
1088 if (expect_false (next->throw))
1089 {
1090 SV *exception = sv_2mortal (next->throw);
1091
1092 next->throw = 0;
1093 sv_setsv (ERRSV, exception);
1094 croak (0);
1095 }
1096}
1097
1098/*
1099 * this is a _very_ stripped down perl interpreter ;)
1100 */
1101static void
1102cctx_run (void *arg)
1103{
1104#ifdef USE_ITHREADS
1105# if CORO_PTHREAD
1106 PERL_SET_CONTEXT (coro_thx);
1107# endif
1108#endif
1109 {
1110 dTHX;
1111
1112 /* entersub called ENTER, but we never 'returned', undo that here */
1113 ENTERSUB_TAIL;
1114
1115 /* we now skip the entersub that did lead to transfer() */
1116 PL_op = PL_op->op_next;
1117
1118 /* inject a fake subroutine call to cctx_init */
1119 cctx_prepare (aTHX_ (coro_cctx *)arg);
1120
1121 /* cctx_run is the alternative tail of transfer() */
1122 transfer_tail (aTHX);
1123
1124 /* somebody or something will hit me for both perl_run and PL_restartop */
1125 PL_restartop = PL_op;
1126 perl_run (PL_curinterp);
1127
1128 /*
1129 * If perl-run returns we assume exit() was being called or the coro
1130 * fell off the end, which seems to be the only valid (non-bug)
1131 * reason for perl_run to return. We try to exit by jumping to the
1132 * bootstrap-time "top" top_env, as we cannot restore the "main"
1133 * coroutine as Coro has no such concept
1134 */
1135 PL_top_env = main_top_env;
1136 JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
1137 }
1138}
1139
1140static coro_cctx *
1141cctx_new ()
1142{
1143 coro_cctx *cctx;
1144
1145 ++cctx_count;
1146 New (0, cctx, 1, coro_cctx);
1147
1148 cctx->gen = cctx_gen;
1149 cctx->flags = 0;
1150 cctx->idle_sp = 0; /* can be accessed by transfer between cctx_run and set_stacklevel, on throw */
1151
1152 return cctx;
1153}
1154
1155/* create a new cctx only suitable as source */
1156static coro_cctx *
1157cctx_new_empty ()
1158{
1159 coro_cctx *cctx = cctx_new ();
1160
1161 cctx->sptr = 0;
1162 coro_create (&cctx->cctx, 0, 0, 0, 0);
1163
1164 return cctx;
1165}
1166
1167/* create a new cctx suitable as destination/running a perl interpreter */
1168static coro_cctx *
1169cctx_new_run ()
1170{
1171 coro_cctx *cctx = cctx_new ();
1172 void *stack_start;
1173 size_t stack_size;
1174
1175#if HAVE_MMAP
1176 cctx->ssize = ((cctx_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
1177 /* mmap supposedly does allocate-on-write for us */
1178 cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
1179
1180 if (cctx->sptr != (void *)-1)
1181 {
1182 #if CORO_STACKGUARD
1183 mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
1184 #endif
1185 stack_start = (char *)cctx->sptr + CORO_STACKGUARD * PAGESIZE;
1186 stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
1187 cctx->flags |= CC_MAPPED;
1188 }
1189 else
1190#endif
1191 {
1192 cctx->ssize = cctx_stacksize * (long)sizeof (long);
1193 New (0, cctx->sptr, cctx_stacksize, long);
1194
1195 if (!cctx->sptr)
1196 {
1197 perror ("FATAL: unable to allocate stack for coroutine");
1198 _exit (EXIT_FAILURE);
1199 }
1200
1201 stack_start = cctx->sptr;
1202 stack_size = cctx->ssize;
1203 }
1204
1205 #if CORO_USE_VALGRIND
1206 cctx->valgrind_id = VALGRIND_STACK_REGISTER ((char *)stack_start, (char *)stack_start + stack_size);
1207 #endif
1208
1209 coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
1210
1211 return cctx;
1212}
1213
1214static void
1215cctx_destroy (coro_cctx *cctx)
1216{
1217 if (!cctx)
1218 return;
1219
1220 --cctx_count;
1221 coro_destroy (&cctx->cctx);
1222
1223 /* coro_transfer creates new, empty cctx's */
1224 if (cctx->sptr)
1225 {
1226 #if CORO_USE_VALGRIND
1227 VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
1228 #endif
1229
1230#if HAVE_MMAP
1231 if (cctx->flags & CC_MAPPED)
1232 munmap (cctx->sptr, cctx->ssize);
1233 else
1234#endif
1235 Safefree (cctx->sptr);
1236 }
1237
1238 Safefree (cctx);
1239}
1240
1241/* wether this cctx should be destructed */
1242#define CCTX_EXPIRED(cctx) ((cctx)->gen != cctx_gen || ((cctx)->flags & CC_NOREUSE))
1243
1244static coro_cctx *
1245cctx_get (pTHX)
1246{
1247 while (expect_true (cctx_first))
1248 {
1249 coro_cctx *cctx = cctx_first;
1250 cctx_first = cctx->next;
1251 --cctx_idle;
1252
1253 if (expect_true (!CCTX_EXPIRED (cctx)))
1254 return cctx;
1255
1256 cctx_destroy (cctx);
1257 }
1258
1259 return cctx_new_run ();
1260}
1261
1262static void
1263cctx_put (coro_cctx *cctx)
1264{
1265 assert (("FATAL: cctx_put called on non-initialised cctx in Coro (please report)", cctx->sptr));
1266
1267 /* free another cctx if overlimit */
1268 if (expect_false (cctx_idle >= cctx_max_idle))
1269 {
1270 coro_cctx *first = cctx_first;
1271 cctx_first = first->next;
1272 --cctx_idle;
1273
1274 cctx_destroy (first);
1275 }
1276
1277 ++cctx_idle;
1278 cctx->next = cctx_first;
1279 cctx_first = cctx;
1280}
1281
1282/** coroutine switching *****************************************************/
1283
1284static void
1285transfer_check (pTHX_ struct coro *prev, struct coro *next)
1286{
1287 if (expect_true (prev != next))
1288 {
1289 if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
1290 croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
1291
1292 if (expect_false (next->flags & CF_RUNNING))
1293 croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
1294
1295 if (expect_false (next->flags & CF_DESTROYED))
1296 croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
1297
1298#if !PERL_VERSION_ATLEAST (5,10,0)
1299 if (expect_false (PL_lex_state != LEX_NOTPARSING))
1300 croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
1301#endif
1302 }
1303}
1304
1305/* always use the TRANSFER macro */
1306static void NOINLINE
1307transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
1308{
1309 dSTACKLEVEL;
1310
1311 /* sometimes transfer is only called to set idle_sp */
1312 if (expect_false (!next))
1313 {
1314 ((coro_cctx *)prev)->idle_sp = STACKLEVEL;
1315 assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
1316 }
1317 else if (expect_true (prev != next))
1318 {
1319 coro_cctx *prev__cctx;
1320
1321 if (expect_false (prev->flags & CF_NEW))
1322 {
1323 /* create a new empty/source context */
1324 prev->cctx = cctx_new_empty ();
1325 prev->flags &= ~CF_NEW;
1326 prev->flags |= CF_RUNNING;
1327 }
1328
1329 prev->flags &= ~CF_RUNNING;
1330 next->flags |= CF_RUNNING;
1331
1332 LOCK;
1333
1334 /* first get rid of the old state */
1335 save_perl (aTHX_ prev);
1336
1337 if (expect_false (next->flags & CF_NEW))
1338 {
1339 /* need to start coroutine */
1340 next->flags &= ~CF_NEW;
1341 /* setup coroutine call */
1342 coro_setup (aTHX_ next);
1343 }
1344 else
1345 load_perl (aTHX_ next);
1346
1347 prev__cctx = prev->cctx;
1348
1349 /* possibly untie and reuse the cctx */
1350 if (expect_true (
1351 prev__cctx->idle_sp == STACKLEVEL
1352 && !(prev__cctx->flags & CC_TRACE)
1353 && !force_cctx
1354 ))
1355 {
1356 /* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
1357 assert (("FATAL: current top_env must equal previous top_env in Coro (please report)", PL_top_env == prev__cctx->idle_te));
1358
1359 prev->cctx = 0;
1360
1361 /* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
1362 /* without this the next cctx_get might destroy the prev__cctx while still in use */
1363 if (expect_false (CCTX_EXPIRED (prev__cctx)))
1364 if (!next->cctx)
1365 next->cctx = cctx_get (aTHX);
1366
1367 cctx_put (prev__cctx);
1368 }
1369
1370 ++next->usecount;
1371
1372 if (expect_true (!next->cctx))
1373 next->cctx = cctx_get (aTHX);
1374
1375 assert (("FATAL: transfer_next already nonzero in Coro (please report)", !transfer_next));
1376 transfer_next = next;
1377
1378 if (expect_false (prev__cctx != next->cctx))
1379 {
1380 prev__cctx->top_env = PL_top_env;
1381 PL_top_env = next->cctx->top_env;
1382 coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
1383 }
1384
1385 transfer_tail (aTHX);
1386 }
1387}
1388
1389#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
1390#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
1391
1392/** high level stuff ********************************************************/
1393
1394static int
1395coro_state_destroy (pTHX_ struct coro *coro)
1396{
1397 if (coro->flags & CF_DESTROYED)
1398 return 0;
1399
1400 coro->flags |= CF_DESTROYED;
1401
1402 if (coro->flags & CF_READY)
1403 {
1404 /* reduce nready, as destroying a ready coro effectively unreadies it */
1405 /* alternative: look through all ready queues and remove the coro */
1406 LOCK;
1407 --coro_nready;
1408 UNLOCK;
1409 }
1410 else
1411 coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
1412
1413 if (coro->mainstack && coro->mainstack != main_mainstack)
1414 {
1415 struct coro temp;
1416
1417 if (coro->flags & CF_RUNNING)
1418 croak ("FATAL: tried to destroy currently running coroutine");
1419
1420 save_perl (aTHX_ &temp);
1421 load_perl (aTHX_ coro);
1422
1423 coro_destruct (aTHX_ coro);
1424
1425 load_perl (aTHX_ &temp);
1426
1427 coro->slot = 0;
1428 }
1429
1430 cctx_destroy (coro->cctx);
1431 SvREFCNT_dec (coro->args);
1432
1433 if (coro->next) coro->next->prev = coro->prev;
1434 if (coro->prev) coro->prev->next = coro->next;
1435 if (coro == coro_first) coro_first = coro->next;
1436
1437 return 1;
1438}
1439
1440static int
1441coro_state_free (pTHX_ SV *sv, MAGIC *mg)
1442{
1443 struct coro *coro = (struct coro *)mg->mg_ptr;
1444 mg->mg_ptr = 0;
1445
1446 coro->hv = 0;
1447
1448 if (--coro->refcnt < 0)
1449 {
1450 coro_state_destroy (aTHX_ coro);
1451 Safefree (coro);
1452 }
1453
1454 return 0;
1455}
1456
1457static int
1458coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
1459{
1460 struct coro *coro = (struct coro *)mg->mg_ptr;
1461
1462 ++coro->refcnt;
1463
1464 return 0;
1465}
1466
1467static MGVTBL coro_state_vtbl = {
1468 0, 0, 0, 0,
1469 coro_state_free,
1470 0,
1471#ifdef MGf_DUP
1472 coro_state_dup,
1473#else
1474# define MGf_DUP 0
1475#endif
1476};
1477
1478static void
1479prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1480{
1481 ta->prev = SvSTATE (prev_sv);
1482 ta->next = SvSTATE (next_sv);
1483 TRANSFER_CHECK (*ta);
1484}
1485
1486static void
1487api_transfer (SV *prev_sv, SV *next_sv)
1488{
1489 dTHX;
1490 struct transfer_args ta;
1491
1492 prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1493 TRANSFER (ta, 1);
1494}
1495
1496/** Coro ********************************************************************/
1497
1498static void
1499coro_enq (pTHX_ SV *coro_sv)
1500{
1501 av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
813} 1502}
814 1503
815static SV * 1504static SV *
816coro_deq (int min_prio) 1505coro_deq (pTHX)
817{ 1506{
818 int prio = PRIO_MAX - PRIO_MIN; 1507 int prio;
819 1508
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; ) 1509 for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
825 if (av_len (coro_ready[prio]) >= 0) 1510 if (AvFILLp (coro_ready [prio]) >= 0)
826 {
827 coro_nready--;
828 return av_shift (coro_ready[prio]); 1511 return av_shift (coro_ready [prio]);
829 }
830 1512
831 return 0; 1513 return 0;
832} 1514}
833 1515
1516static int
1517api_ready (SV *coro_sv)
1518{
1519 dTHX;
1520 struct coro *coro;
1521 SV *sv_hook;
1522 void (*xs_hook)(void);
1523
1524 if (SvROK (coro_sv))
1525 coro_sv = SvRV (coro_sv);
1526
1527 coro = SvSTATE (coro_sv);
1528
1529 if (coro->flags & CF_READY)
1530 return 0;
1531
1532 coro->flags |= CF_READY;
1533
1534 LOCK;
1535
1536 sv_hook = coro_nready ? 0 : coro_readyhook;
1537 xs_hook = coro_nready ? 0 : coroapi.readyhook;
1538
1539 coro_enq (aTHX_ SvREFCNT_inc_NN (coro_sv));
1540 ++coro_nready;
1541
1542 UNLOCK;
1543
1544 if (sv_hook)
1545 {
1546 dSP;
1547
1548 ENTER;
1549 SAVETMPS;
1550
1551 PUSHMARK (SP);
1552 PUTBACK;
1553 call_sv (sv_hook, G_DISCARD);
1554 SPAGAIN;
1555
1556 FREETMPS;
1557 LEAVE;
1558 }
1559
1560 if (xs_hook)
1561 xs_hook ();
1562
1563 return 1;
1564}
1565
1566static int
1567api_is_ready (SV *coro_sv)
1568{
1569 dTHX;
1570
1571 return !!(SvSTATE (coro_sv)->flags & CF_READY);
1572}
1573
1574INLINE void
1575prepare_schedule (pTHX_ struct transfer_args *ta)
1576{
1577 SV *prev_sv, *next_sv;
1578
1579 for (;;)
1580 {
1581 LOCK;
1582 next_sv = coro_deq (aTHX);
1583
1584 /* nothing to schedule: call the idle handler */
1585 if (expect_false (!next_sv))
1586 {
1587 dSP;
1588 UNLOCK;
1589
1590 ENTER;
1591 SAVETMPS;
1592
1593 PUSHMARK (SP);
1594 PUTBACK;
1595 call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
1596 SPAGAIN;
1597
1598 FREETMPS;
1599 LEAVE;
1600 continue;
1601 }
1602
1603 ta->next = SvSTATE (next_sv);
1604
1605 /* cannot transfer to destroyed coros, skip and look for next */
1606 if (expect_false (ta->next->flags & CF_DESTROYED))
1607 {
1608 UNLOCK;
1609 SvREFCNT_dec (next_sv);
1610 /* coro_nready has already been taken care of by destroy */
1611 continue;
1612 }
1613
1614 --coro_nready;
1615 UNLOCK;
1616 break;
1617 }
1618
1619 /* free this only after the transfer */
1620 prev_sv = SvRV (coro_current);
1621 ta->prev = SvSTATE (prev_sv);
1622 TRANSFER_CHECK (*ta);
1623 assert (("FATAL: next coroutine isn't marked as ready in Coro (please report)", ta->next->flags & CF_READY));
1624 ta->next->flags &= ~CF_READY;
1625 SvRV_set (coro_current, next_sv);
1626
1627 LOCK;
1628 free_coro_mortal (aTHX);
1629 coro_mortal = prev_sv;
1630 UNLOCK;
1631}
1632
1633INLINE void
1634prepare_cede (pTHX_ struct transfer_args *ta)
1635{
1636 api_ready (coro_current);
1637 prepare_schedule (aTHX_ ta);
1638}
1639
1640static int
1641prepare_cede_notself (pTHX_ struct transfer_args *ta)
1642{
1643 if (coro_nready)
1644 {
1645 SV *prev = SvRV (coro_current);
1646 prepare_schedule (aTHX_ ta);
1647 api_ready (prev);
1648 return 1;
1649 }
1650 else
1651 return 0;
1652}
1653
834static void 1654static void
835api_ready (SV *coro) 1655api_schedule (void)
836{ 1656{
837 coro_enq (SvREFCNT_inc (coro)); 1657 dTHX;
1658 struct transfer_args ta;
1659
1660 prepare_schedule (aTHX_ &ta);
1661 TRANSFER (ta, 1);
1662}
1663
1664static int
1665api_cede (void)
1666{
1667 dTHX;
1668 struct transfer_args ta;
1669
1670 prepare_cede (aTHX_ &ta);
1671
1672 if (expect_true (ta.prev != ta.next))
1673 {
1674 TRANSFER (ta, 1);
1675 return 1;
1676 }
1677 else
1678 return 0;
1679}
1680
1681static int
1682api_cede_notself (void)
1683{
1684 dTHX;
1685 struct transfer_args ta;
1686
1687 if (prepare_cede_notself (aTHX_ &ta))
1688 {
1689 TRANSFER (ta, 1);
1690 return 1;
1691 }
1692 else
1693 return 0;
838} 1694}
839 1695
840static void 1696static void
841api_schedule (int cede) 1697api_trace (SV *coro_sv, int flags)
842{ 1698{
843 SV *prev, *next; 1699 dTHX;
1700 struct coro *coro = SvSTATE (coro_sv);
844 1701
845 prev = GvSV (coro_current); 1702 if (flags & CC_TRACE)
1703 {
1704 if (!coro->cctx)
1705 coro->cctx = cctx_new_run ();
1706 else if (!(coro->cctx->flags & CC_TRACE))
1707 croak ("cannot enable tracing on coroutine with custom stack");
846 1708
847 if (cede) 1709 coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
848 coro_enq (SvREFCNT_inc (prev)); 1710 }
1711 else if (coro->cctx && coro->cctx->flags & CC_TRACE)
1712 {
1713 coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
849 1714
850 next = coro_deq (PRIO_MIN); 1715 if (coro->flags & CF_RUNNING)
851 1716 PL_runops = RUNOPS_DEFAULT;
852 if (!next) 1717 else
853 next = SvREFCNT_inc (GvSV (coro_idle)); 1718 coro->slot->runops = RUNOPS_DEFAULT;
854 1719 }
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} 1720}
863 1721
1722#if 0
1723static int
1724coro_gensub_free (pTHX_ SV *sv, MAGIC *mg)
1725{
1726 AV *padlist;
1727 AV *av = (AV *)mg->mg_obj;
1728
1729 abort ();
1730
1731 return 0;
1732}
1733
1734static MGVTBL coro_gensub_vtbl = {
1735 0, 0, 0, 0,
1736 coro_gensub_free
1737};
1738#endif
1739
1740/*****************************************************************************/
1741/* PerlIO::cede */
1742
1743typedef struct
1744{
1745 PerlIOBuf base;
1746 NV next, every;
1747} PerlIOCede;
1748
1749static IV
1750PerlIOCede_pushed (pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1751{
1752 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1753
1754 self->every = SvCUR (arg) ? SvNV (arg) : 0.01;
1755 self->next = nvtime () + self->every;
1756
1757 return PerlIOBuf_pushed (aTHX_ f, mode, Nullsv, tab);
1758}
1759
1760static SV *
1761PerlIOCede_getarg (pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
1762{
1763 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1764
1765 return newSVnv (self->every);
1766}
1767
1768static IV
1769PerlIOCede_flush (pTHX_ PerlIO *f)
1770{
1771 PerlIOCede *self = PerlIOSelf (f, PerlIOCede);
1772 double now = nvtime ();
1773
1774 if (now >= self->next)
1775 {
1776 api_cede ();
1777 self->next = now + self->every;
1778 }
1779
1780 return PerlIOBuf_flush (aTHX_ f);
1781}
1782
1783static PerlIO_funcs PerlIO_cede =
1784{
1785 sizeof(PerlIO_funcs),
1786 "cede",
1787 sizeof(PerlIOCede),
1788 PERLIO_K_DESTRUCT | PERLIO_K_RAW,
1789 PerlIOCede_pushed,
1790 PerlIOBuf_popped,
1791 PerlIOBuf_open,
1792 PerlIOBase_binmode,
1793 PerlIOCede_getarg,
1794 PerlIOBase_fileno,
1795 PerlIOBuf_dup,
1796 PerlIOBuf_read,
1797 PerlIOBuf_unread,
1798 PerlIOBuf_write,
1799 PerlIOBuf_seek,
1800 PerlIOBuf_tell,
1801 PerlIOBuf_close,
1802 PerlIOCede_flush,
1803 PerlIOBuf_fill,
1804 PerlIOBase_eof,
1805 PerlIOBase_error,
1806 PerlIOBase_clearerr,
1807 PerlIOBase_setlinebuf,
1808 PerlIOBuf_get_base,
1809 PerlIOBuf_bufsiz,
1810 PerlIOBuf_get_ptr,
1811 PerlIOBuf_get_cnt,
1812 PerlIOBuf_set_ptrcnt,
1813};
1814
1815
864MODULE = Coro::State PACKAGE = Coro::State 1816MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
865 1817
866PROTOTYPES: ENABLE 1818PROTOTYPES: DISABLE
867 1819
868BOOT: 1820BOOT:
869{ /* {} necessary for stoopid perl-5.6.x */ 1821{
870 ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1); 1822#ifdef USE_ITHREADS
871 PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1); 1823 MUTEX_INIT (&coro_lock);
1824# if CORO_PTHREAD
1825 coro_thx = PERL_GET_CONTEXT;
1826# endif
1827#endif
1828 BOOT_PAGESIZE;
1829
1830 irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
1831 stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
1832
1833 orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
1834 orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
1835 orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
1836
1837 hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
1838 rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
1839 rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
1840
872 coro_state_stash = gv_stashpv ("Coro::State", TRUE); 1841 coro_state_stash = gv_stashpv ("Coro::State", TRUE);
873 1842
874 newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV)); 1843 newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
875 newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV)); 1844 newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
876 newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV)); 1845 newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
877 newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT)); 1846 newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
878
879 if (!padlist_cache)
880 padlist_cache = newHV ();
881 1847
882 main_mainstack = PL_mainstack; 1848 main_mainstack = PL_mainstack;
1849 main_top_env = PL_top_env;
883 1850
1851 while (main_top_env->je_prev)
1852 main_top_env = main_top_env->je_prev;
1853
884 coroapi.ver = CORO_API_VERSION; 1854 coroapi.ver = CORO_API_VERSION;
1855 coroapi.rev = CORO_API_REVISION;
885 coroapi.transfer = api_transfer; 1856 coroapi.transfer = api_transfer;
886}
887 1857
888Coro::State 1858 {
889_newprocess(args) 1859 SV **svp = hv_fetch (PL_modglobal, "Time::NVtime", 12, 0);
890 SV * args 1860
891 PROTOTYPE: $ 1861 if (!svp) croak ("Time::HiRes is required");
1862 if (!SvIOK (*svp)) croak ("Time::NVtime isn't a function pointer");
1863
1864 nvtime = INT2PTR (double (*)(), SvIV (*svp));
1865 }
1866
1867 assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1868}
1869
1870SV *
1871new (char *klass, ...)
892 CODE: 1872 CODE:
893 Coro__State coro; 1873{
1874 struct coro *coro;
1875 MAGIC *mg;
1876 HV *hv;
1877 int i;
894 1878
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); 1879 Newz (0, coro, 1, struct coro);
1880 coro->args = newAV ();
1881 coro->flags = CF_NEW;
899 1882
900 coro->args = (AV *)SvREFCNT_inc (SvRV (args)); 1883 if (coro_first) coro_first->prev = coro;
901 coro->mainstack = 0; /* actual work is done inside transfer */ 1884 coro->next = coro_first;
902 coro->stack = 0; 1885 coro_first = coro;
903 1886
904 RETVAL = coro; 1887 coro->hv = hv = newHV ();
1888 mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
1889 mg->mg_flags |= MGf_DUP;
1890 RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1891
1892 av_extend (coro->args, items - 1);
1893 for (i = 1; i < items; i++)
1894 av_push (coro->args, newSVsv (ST (i)));
1895}
905 OUTPUT: 1896 OUTPUT:
906 RETVAL 1897 RETVAL
907 1898
1899# these not obviously related functions are all rolled into the same xs
1900# function to increase chances that they all will call transfer with the same
1901# stack offset
908void 1902void
909transfer(prev, next, flags) 1903_set_stacklevel (...)
910 Coro::State_or_hashref prev 1904 ALIAS:
911 Coro::State_or_hashref next 1905 Coro::State::transfer = 1
912 int flags 1906 Coro::schedule = 2
913 PROTOTYPE: @ 1907 Coro::cede = 3
1908 Coro::cede_notself = 4
914 CODE: 1909 CODE:
1910{
1911 struct transfer_args ta;
1912
915 PUTBACK; 1913 PUTBACK;
916 transfer (aTHX_ prev, next, flags); 1914 switch (ix)
1915 {
1916 case 0:
1917 prepare_set_stacklevel (&ta, (struct coro_cctx *)SvIV (ST (0)));
1918 break;
1919
1920 case 1:
1921 if (items != 2)
1922 croak ("Coro::State::transfer (prev, next) expects two arguments, not %d", items);
1923
1924 prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1925 break;
1926
1927 case 2:
1928 prepare_schedule (aTHX_ &ta);
1929 break;
1930
1931 case 3:
1932 prepare_cede (aTHX_ &ta);
1933 break;
1934
1935 case 4:
1936 if (!prepare_cede_notself (aTHX_ &ta))
1937 XSRETURN_EMPTY;
1938
1939 break;
1940 }
917 SPAGAIN; 1941 SPAGAIN;
918 1942
1943 BARRIER;
1944 PUTBACK;
1945 TRANSFER (ta, 0);
1946 SPAGAIN; /* might be the sp of a different coroutine now */
1947 /* be extra careful not to ever do anything after TRANSFER */
1948}
1949
1950bool
1951_destroy (SV *coro_sv)
1952 CODE:
1953 RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1954 OUTPUT:
1955 RETVAL
1956
919void 1957void
920DESTROY(coro) 1958_exit (int code)
921 Coro::State coro 1959 PROTOTYPE: $
922 CODE: 1960 CODE:
1961 _exit (code);
923 1962
924 if (coro->mainstack && coro->mainstack != main_mainstack) 1963int
1964cctx_stacksize (int new_stacksize = 0)
1965 CODE:
1966 RETVAL = cctx_stacksize;
1967 if (new_stacksize)
1968 {
1969 cctx_stacksize = new_stacksize;
1970 ++cctx_gen;
1971 }
1972 OUTPUT:
1973 RETVAL
1974
1975int
1976cctx_max_idle (int max_idle = 0)
1977 CODE:
1978 RETVAL = cctx_max_idle;
1979 if (max_idle > 1)
1980 cctx_max_idle = max_idle;
1981 OUTPUT:
1982 RETVAL
1983
1984int
1985cctx_count ()
1986 CODE:
1987 RETVAL = cctx_count;
1988 OUTPUT:
1989 RETVAL
1990
1991int
1992cctx_idle ()
1993 CODE:
1994 RETVAL = cctx_idle;
1995 OUTPUT:
1996 RETVAL
1997
1998void
1999list ()
2000 PPCODE:
2001{
2002 struct coro *coro;
2003 for (coro = coro_first; coro; coro = coro->next)
2004 if (coro->hv)
2005 XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
2006}
2007
2008void
2009call (Coro::State coro, SV *coderef)
2010 ALIAS:
2011 eval = 1
2012 CODE:
2013{
2014 if (coro->mainstack && ((coro->flags & CF_RUNNING) || coro->slot))
925 { 2015 {
926 struct coro temp; 2016 struct coro temp;
927 2017
2018 if (!(coro->flags & CF_RUNNING))
2019 {
2020 PUTBACK;
2021 save_perl (aTHX_ &temp);
2022 load_perl (aTHX_ coro);
2023 }
2024
2025 {
2026 dSP;
2027 ENTER;
2028 SAVETMPS;
928 PUTBACK; 2029 PUTBACK;
929 SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL); 2030 PUSHSTACK;
930 LOAD(aTHX_ coro); 2031 PUSHMARK (SP);
2032
2033 if (ix)
2034 eval_sv (coderef, 0);
2035 else
2036 call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
2037
2038 POPSTACK;
931 SPAGAIN; 2039 SPAGAIN;
2040 FREETMPS;
2041 LEAVE;
2042 PUTBACK;
2043 }
932 2044
933 destroy_stacks (aTHX); 2045 if (!(coro->flags & CF_RUNNING))
934 2046 {
935 LOAD((&temp)); /* this will get rid of defsv etc.. */ 2047 save_perl (aTHX_ coro);
2048 load_perl (aTHX_ &temp);
936 SPAGAIN; 2049 SPAGAIN;
937 2050 }
938 coro->mainstack = 0;
939 } 2051 }
2052}
940 2053
941 deallocate_stack (coro); 2054SV *
942 2055is_ready (Coro::State coro)
943 Safefree (coro); 2056 PROTOTYPE: $
2057 ALIAS:
2058 is_ready = CF_READY
2059 is_running = CF_RUNNING
2060 is_new = CF_NEW
2061 is_destroyed = CF_DESTROYED
2062 CODE:
2063 RETVAL = boolSV (coro->flags & ix);
2064 OUTPUT:
2065 RETVAL
944 2066
945void 2067void
946flush() 2068throw (Coro::State self, SV *throw = &PL_sv_undef)
947 CODE: 2069 PROTOTYPE: $;$
948#ifdef MAY_FLUSH 2070 CODE:
949 flush_padlist_cache (); 2071 SvREFCNT_dec (self->throw);
950#endif 2072 self->throw = SvOK (throw) ? newSVsv (throw) : 0;
951 2073
952void 2074void
953_exit(code) 2075api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
954 int code 2076
2077SV *
2078has_cctx (Coro::State coro)
955 PROTOTYPE: $ 2079 PROTOTYPE: $
956 CODE: 2080 CODE:
957#if defined(__GLIBC__) || _POSIX_C_SOURCE 2081 RETVAL = boolSV (!!coro->cctx);
958 _exit (code); 2082 OUTPUT:
959#else 2083 RETVAL
960 signal (SIGTERM, SIG_DFL);
961 raise (SIGTERM);
962 exit (code);
963#endif
964 2084
965MODULE = Coro::State PACKAGE = Coro::Cont 2085int
2086is_traced (Coro::State coro)
2087 PROTOTYPE: $
2088 CODE:
2089 RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
2090 OUTPUT:
2091 RETVAL
966 2092
967# this is slightly dirty (should expose a c-level api) 2093UV
2094rss (Coro::State coro)
2095 PROTOTYPE: $
2096 ALIAS:
2097 usecount = 1
2098 CODE:
2099 switch (ix)
2100 {
2101 case 0: RETVAL = coro_rss (aTHX_ coro); break;
2102 case 1: RETVAL = coro->usecount; break;
2103 }
2104 OUTPUT:
2105 RETVAL
968 2106
969void 2107void
970yield(...) 2108force_cctx ()
2109 CODE:
2110 struct coro *coro = SvSTATE (coro_current);
2111 coro->cctx->idle_sp = 0;
2112
2113void
2114swap_defsv (Coro::State self)
971 PROTOTYPE: @ 2115 PROTOTYPE: $
2116 ALIAS:
2117 swap_defav = 1
972 CODE: 2118 CODE:
973 static SV *returnstk; 2119 if (!self->slot)
974 SV *sv; 2120 croak ("cannot swap state with coroutine that has no saved state");
975 AV *defav = GvAV (PL_defgv); 2121 else
976 struct coro *prev, *next; 2122 {
2123 SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
2124 SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
977 2125
978 if (!returnstk) 2126 SV *tmp = *src; *src = *dst; *dst = tmp;
979 returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE)); 2127 }
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 2128
995MODULE = Coro::State PACKAGE = Coro 2129MODULE = Coro::State PACKAGE = Coro
996 2130
997# this is slightly dirty (should expose a c-level api)
998
999BOOT: 2131BOOT:
1000{ 2132{
1001 int i; 2133 int i;
2134
2135 av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
2136 sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
2137 sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
2138
2139 coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
2140 SvREADONLY_on (coro_current);
2141
1002 HV *stash = gv_stashpv ("Coro", TRUE); 2142 coro_stash = gv_stashpv ("Coro", TRUE);
1003 2143
1004 newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX)); 2144 newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1005 newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH)); 2145 newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1006 newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL)); 2146 newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1007 newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW)); 2147 newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1008 newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE)); 2148 newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1009 newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN)); 2149 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 2150
1014 for (i = PRIO_MAX - PRIO_MIN + 1; i--; ) 2151 for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1015 coro_ready[i] = newAV (); 2152 coro_ready[i] = newAV ();
1016 2153
1017 { 2154 {
1018 SV *sv = perl_get_sv("Coro::API", 1); 2155 SV *sv = coro_get_sv (aTHX_ "Coro::API", TRUE);
1019 2156
1020 coroapi.schedule = api_schedule; 2157 coroapi.schedule = api_schedule;
2158 coroapi.cede = api_cede;
2159 coroapi.cede_notself = api_cede_notself;
1021 coroapi.ready = api_ready; 2160 coroapi.ready = api_ready;
2161 coroapi.is_ready = api_is_ready;
1022 coroapi.nready = &coro_nready; 2162 coroapi.nready = &coro_nready;
1023 coroapi.current = coro_current; 2163 coroapi.current = coro_current;
1024 2164
1025 GCoroAPI = &coroapi; 2165 GCoroAPI = &coroapi;
1026 sv_setiv(sv, (IV)&coroapi); 2166 sv_setiv (sv, (IV)&coroapi);
1027 SvREADONLY_on(sv); 2167 SvREADONLY_on (sv);
1028 } 2168 }
1029} 2169}
1030 2170
1031void 2171void
1032ready(self) 2172_set_current (SV *current)
1033 SV * self 2173 PROTOTYPE: $
1034 CODE: 2174 CODE:
1035 api_ready (self); 2175 SvREFCNT_dec (SvRV (coro_current));
2176 SvRV_set (coro_current, SvREFCNT_inc_NN (SvRV (current)));
2177
2178void
2179_set_readyhook (SV *hook)
2180 PROTOTYPE: $
2181 CODE:
2182 LOCK;
2183 SvREFCNT_dec (coro_readyhook);
2184 coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
2185 UNLOCK;
1036 2186
1037int 2187int
2188prio (Coro::State coro, int newprio = 0)
2189 ALIAS:
2190 nice = 1
2191 CODE:
2192{
2193 RETVAL = coro->prio;
2194
2195 if (items > 1)
2196 {
2197 if (ix)
2198 newprio = coro->prio - newprio;
2199
2200 if (newprio < PRIO_MIN) newprio = PRIO_MIN;
2201 if (newprio > PRIO_MAX) newprio = PRIO_MAX;
2202
2203 coro->prio = newprio;
2204 }
2205}
2206 OUTPUT:
2207 RETVAL
2208
2209SV *
2210ready (SV *self)
2211 PROTOTYPE: $
2212 CODE:
2213 RETVAL = boolSV (api_ready (self));
2214 OUTPUT:
2215 RETVAL
2216
2217int
1038nready(...) 2218nready (...)
1039 PROTOTYPE: 2219 PROTOTYPE:
1040 CODE: 2220 CODE:
1041 RETVAL = coro_nready; 2221 RETVAL = coro_nready;
1042 OUTPUT: 2222 OUTPUT:
1043 RETVAL 2223 RETVAL
1044 2224
2225# for async_pool speedup
1045void 2226void
1046schedule(...) 2227_pool_1 (SV *cb)
1047 PROTOTYPE:
1048 ALIAS:
1049 cede = 1
1050 CODE: 2228 CODE:
1051 api_schedule (ix); 2229{
2230 struct coro *coro = SvSTATE (coro_current);
2231 HV *hv = (HV *)SvRV (coro_current);
2232 AV *defav = GvAV (PL_defgv);
2233 SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
2234 AV *invoke_av;
2235 int i, len;
1052 2236
2237 if (!invoke)
2238 {
2239 SV *old = PL_diehook;
2240 PL_diehook = 0;
2241 SvREFCNT_dec (old);
2242 croak ("\3async_pool terminate\2\n");
2243 }
2244
2245 SvREFCNT_dec (coro->saved_deffh);
2246 coro->saved_deffh = SvREFCNT_inc_NN ((SV *)PL_defoutgv);
2247
2248 hv_store (hv, "desc", sizeof ("desc") - 1,
2249 newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
2250
2251 invoke_av = (AV *)SvRV (invoke);
2252 len = av_len (invoke_av);
2253
2254 sv_setsv (cb, AvARRAY (invoke_av)[0]);
2255
2256 if (len > 0)
2257 {
2258 av_fill (defav, len - 1);
2259 for (i = 0; i < len; ++i)
2260 av_store (defav, i, SvREFCNT_inc_NN (AvARRAY (invoke_av)[i + 1]));
2261 }
2262
2263 SvREFCNT_dec (invoke);
2264}
2265
2266void
2267_pool_2 (SV *cb)
2268 CODE:
2269{
2270 struct coro *coro = SvSTATE (coro_current);
2271
2272 sv_setsv (cb, &PL_sv_undef);
2273
2274 SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
2275 coro->saved_deffh = 0;
2276
2277 if (coro_rss (aTHX_ coro) > SvUV (sv_pool_rss)
2278 || av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
2279 {
2280 SV *old = PL_diehook;
2281 PL_diehook = 0;
2282 SvREFCNT_dec (old);
2283 croak ("\3async_pool terminate\2\n");
2284 }
2285
2286 av_clear (GvAV (PL_defgv));
2287 hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
2288 newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
2289
2290 coro->prio = 0;
2291
2292 if (coro->cctx && (coro->cctx->flags & CC_TRACE))
2293 api_trace (coro_current, 0);
2294
2295 av_push (av_async_pool, newSVsv (coro_current));
2296}
2297
2298#if 0
2299
2300void
2301_generator_call (...)
2302 PROTOTYPE: @
2303 PPCODE:
2304 fprintf (stderr, "call %p\n", CvXSUBANY(cv).any_ptr);
2305 xxxx
2306 abort ();
2307
2308SV *
2309gensub (SV *sub, ...)
2310 PROTOTYPE: &;@
2311 CODE:
2312{
2313 struct coro *coro;
2314 MAGIC *mg;
2315 CV *xcv;
2316 CV *ncv = (CV *)newSV_type (SVt_PVCV);
2317 int i;
2318
2319 CvGV (ncv) = CvGV (cv);
2320 CvFILE (ncv) = CvFILE (cv);
2321
2322 Newz (0, coro, 1, struct coro);
2323 coro->args = newAV ();
2324 coro->flags = CF_NEW;
2325
2326 av_extend (coro->args, items - 1);
2327 for (i = 1; i < items; i++)
2328 av_push (coro->args, newSVsv (ST (i)));
2329
2330 CvISXSUB_on (ncv);
2331 CvXSUBANY (ncv).any_ptr = (void *)coro;
2332
2333 xcv = GvCV (gv_fetchpv ("Coro::_generator_call", 0, SVt_PVCV));
2334
2335 CvXSUB (ncv) = CvXSUB (xcv);
2336 CvANON_on (ncv);
2337
2338 mg = sv_magicext ((SV *)ncv, 0, CORO_MAGIC_type_state, &coro_gensub_vtbl, (char *)coro, 0);
2339 RETVAL = newRV_noinc ((SV *)ncv);
2340}
2341 OUTPUT:
2342 RETVAL
2343
2344#endif
2345
2346
2347MODULE = Coro::State PACKAGE = Coro::AIO
2348
2349void
2350_get_state (SV *self)
2351 PPCODE:
2352{
2353 AV *defav = GvAV (PL_defgv);
2354 AV *av = newAV ();
2355 int i;
2356 SV *data_sv = newSV (sizeof (struct io_state));
2357 struct io_state *data = (struct io_state *)SvPVX (data_sv);
2358 SvCUR_set (data_sv, sizeof (struct io_state));
2359 SvPOK_only (data_sv);
2360
2361 data->errorno = errno;
2362 data->laststype = PL_laststype;
2363 data->laststatval = PL_laststatval;
2364 data->statcache = PL_statcache;
2365
2366 av_extend (av, AvFILLp (defav) + 1 + 1);
2367
2368 for (i = 0; i <= AvFILLp (defav); ++i)
2369 av_push (av, SvREFCNT_inc_NN (AvARRAY (defav)[i]));
2370
2371 av_push (av, data_sv);
2372
2373 XPUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
2374
2375 api_ready (self);
2376}
2377
2378void
2379_set_state (SV *state)
2380 PROTOTYPE: $
2381 PPCODE:
2382{
2383 AV *av = (AV *)SvRV (state);
2384 struct io_state *data = (struct io_state *)SvPVX (AvARRAY (av)[AvFILLp (av)]);
2385 int i;
2386
2387 errno = data->errorno;
2388 PL_laststype = data->laststype;
2389 PL_laststatval = data->laststatval;
2390 PL_statcache = data->statcache;
2391
2392 EXTEND (SP, AvFILLp (av));
2393 for (i = 0; i < AvFILLp (av); ++i)
2394 PUSHs (sv_2mortal (SvREFCNT_inc_NN (AvARRAY (av)[i])));
2395}
2396
2397
2398MODULE = Coro::State PACKAGE = Coro::AnyEvent
2399
2400BOOT:
2401 sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
2402
2403SV *
2404_schedule (...)
2405 PROTOTYPE: @
2406 CODE:
2407{
2408 static int incede;
2409
2410 api_cede_notself ();
2411
2412 ++incede;
2413 while (coro_nready >= incede && api_cede ())
2414 ;
2415
2416 sv_setsv (sv_activity, &PL_sv_undef);
2417 if (coro_nready >= incede)
2418 {
2419 PUSHMARK (SP);
2420 PUTBACK;
2421 call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
2422 SPAGAIN;
2423 }
2424
2425 --incede;
2426}
2427
2428
2429MODULE = Coro::State PACKAGE = PerlIO::cede
2430
2431BOOT:
2432 PerlIO_define_layer (aTHX_ &PerlIO_cede);
2433

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