[ViewVC] Diff of: cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.114 by root, Thu Nov 30 21:22:45 2006 UTC vs.
Revision 1.140 by root, Sat Jan 20 19:52:15 2007 UTC

…		…
4	#include "perl.h"	4	#include "perl.h"
5	#include "XSUB.h"	5	#include "XSUB.h"
6		6
7	#include "patchlevel.h"	7	#include "patchlevel.h"
8		8
9	#if USE_VALGRIND
10	# include <valgrind/valgrind.h>
11	#endif
12
13	#define PERL_VERSION_ATLEAST(a,b,c) \
14	(PERL_REVISION > (a) \
15	\|\| (PERL_REVISION == (a) \
16	&& (PERL_VERSION > (b) \
17	\|\| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
18
19	#if !PERL_VERSION_ATLEAST (5,6,0)
20	# ifndef PL_ppaddr
21	# define PL_ppaddr ppaddr
22	# endif
23	# ifndef call_sv
24	# define call_sv perl_call_sv
25	# endif
26	# ifndef get_sv
27	# define get_sv perl_get_sv
28	# endif
29	# ifndef get_cv
30	# define get_cv perl_get_cv
31	# endif
32	# ifndef IS_PADGV
33	# define IS_PADGV(v) 0
34	# endif
35	# ifndef IS_PADCONST
36	# define IS_PADCONST(v) 0
37	# endif
38	#endif
39
40	#include <stdio.h>	9	#include <stdio.h>
41	#include <errno.h>	10	#include <errno.h>
42		11	#include <assert.h>
43	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
44	# undef STACKGUARD
45	#endif
46
47	#ifndef STACKGUARD
48	# define STACKGUARD 0
49	#endif
50		12
51	#ifdef HAVE_MMAP	13	#ifdef HAVE_MMAP
52	# include <unistd.h>	14	# include <unistd.h>
53	# include <sys/mman.h>	15	# include <sys/mman.h>
54	# ifndef MAP_ANONYMOUS	16	# ifndef MAP_ANONYMOUS
…		…
69	#else	31	#else
70	# define PAGESIZE 0	32	# define PAGESIZE 0
71	# define BOOT_PAGESIZE (void)0	33	# define BOOT_PAGESIZE (void)0
72	#endif	34	#endif
73		35
		36	#if USE_VALGRIND
		37	# include <valgrind/valgrind.h>
		38	#endif
		39
		40	/* the maximum number of idle cctx that will be pooled */
		41	#define MAX_IDLE_CCTX 8
		42
		43	#define PERL_VERSION_ATLEAST(a,b,c) \
		44	(PERL_REVISION > (a) \
		45	\|\| (PERL_REVISION == (a) \
		46	&& (PERL_VERSION > (b) \
		47	\|\| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		48
		49	#if !PERL_VERSION_ATLEAST (5,6,0)
		50	# ifndef PL_ppaddr
		51	# define PL_ppaddr ppaddr
		52	# endif
		53	# ifndef call_sv
		54	# define call_sv perl_call_sv
		55	# endif
		56	# ifndef get_sv
		57	# define get_sv perl_get_sv
		58	# endif
		59	# ifndef get_cv
		60	# define get_cv perl_get_cv
		61	# endif
		62	# ifndef IS_PADGV
		63	# define IS_PADGV(v) 0
		64	# endif
		65	# ifndef IS_PADCONST
		66	# define IS_PADCONST(v) 0
		67	# endif
		68	#endif
		69
		70	/* 5.8.7 */
		71	#ifndef SvRV_set
		72	# define SvRV_set(s,v) SvRV(s) = (v)
		73	#endif
		74
		75	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		76	# undef STACKGUARD
		77	#endif
		78
		79	#ifndef STACKGUARD
		80	# define STACKGUARD 0
		81	#endif
		82
		83	/* prefer perl internal functions over our own? */
		84	#ifndef PREFER_PERL_FUNCTIONS
		85	# define PREFER_PERL_FUNCTIONS 0
		86	#endif
		87
74	/* The next macro should declare a variable stacklevel that contains and approximation	88	/* The next macro should declare a variable stacklevel that contains and approximation
75	* to the current C stack pointer. Its property is that it changes with each call	89	* to the current C stack pointer. Its property is that it changes with each call
76	* and should be unique. */	90	* and should be unique. */
77	#define dSTACKLEVEL int stacklevel	91	#define dSTACKLEVEL int stacklevel
78	#define STACKLEVEL ((void *)&stacklevel)	92	#define STACKLEVEL ((void *)&stacklevel)
79		93
80	#define IN_DESTRUCT (PL_main_cv == Nullcv)	94	#define IN_DESTRUCT (PL_main_cv == Nullcv)
81		95
82	#if __GNUC__ >= 3	96	#if __GNUC__ >= 3
83	# define attribute(x) __attribute__(x)	97	# define attribute(x) __attribute__(x)
		98	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
84	#else	99	#else
85	# define attribute(x)	100	# define attribute(x)
		101	# define BARRIER
86	#endif	102	#endif
87		103
88	#define NOINLINE attribute ((noinline))	104	#define NOINLINE attribute ((noinline))
89		105
90	#include "CoroAPI.h"	106	#include "CoroAPI.h"
91
92	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
93		107
94	#ifdef USE_ITHREADS	108	#ifdef USE_ITHREADS
95	static perl_mutex coro_mutex;	109	static perl_mutex coro_mutex;
96	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	110	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
97	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	111	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
98	#else	112	#else
99	# define LOCK (void)0	113	# define LOCK (void)0
100	# define UNLOCK (void)0	114	# define UNLOCK (void)0
101	#endif	115	#endif
102		116
		117	/* helper storage struct for Coro::AIO */
		118	struct io_state
		119	{
		120	int errorno;
		121	I32 laststype;
		122	int laststatval;
		123	Stat_t statcache;
		124	};
		125
103	static struct CoroAPI coroapi;	126	static struct CoroAPI coroapi;
104	static AV main_mainstack; / used to differentiate between $main and others */	127	static AV main_mainstack; / used to differentiate between $main and others */
105	static HV coro_state_stash, coro_stash;	128	static HV coro_state_stash, coro_stash;
106	static SV coro_mortal; / will be freed after next transfer */	129	static SV coro_mortal; / will be freed after next transfer */
107		130
…		…
115	/* the stack */	138	/* the stack */
116	void *sptr;	139	void *sptr;
117	long ssize; /* positive == mmap, otherwise malloc */	140	long ssize; /* positive == mmap, otherwise malloc */
118		141
119	/* cpu state */	142	/* cpu state */
120	void idle_sp; / sp of top-level transfer/schedule/cede call */	143	void idle_sp; / sp of top-level transfer/schedule/cede call */
		144	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
121	JMPENV *top_env;	145	JMPENV *top_env;
122	coro_context cctx;	146	coro_context cctx;
123		147
124	int inuse;	148	int inuse;
125		149
…		…
127	int valgrind_id;	151	int valgrind_id;
128	#endif	152	#endif
129	} coro_cctx;	153	} coro_cctx;
130		154
131	enum {	155	enum {
132	CF_RUNNING, /* coroutine is running */	156	CF_RUNNING = 0x0001, /* coroutine is running */
133	CF_READY, /* coroutine is ready */	157	CF_READY = 0x0002, /* coroutine is ready */
		158	CF_NEW = 0x0004, /* has never been switched to */
		159	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
134	};	160	};
135		161
136	/* this is a structure representing a perl-level coroutine */	162	/* this is a structure representing a perl-level coroutine */
137	struct coro {	163	struct coro {
138	/* the c coroutine allocated to this perl coroutine, if any */	164	/* the c coroutine allocated to this perl coroutine, if any */
139	coro_cctx *cctx;	165	coro_cctx *cctx;
140		166
141	/* data associated with this coroutine (initial args) */	167	/* data associated with this coroutine (initial args) */
142	AV *args;	168	AV *args;
143	int refcnt;	169	int refcnt;
144	int flags;	170	int save; /* CORO_SAVE flags */
		171	int flags; /* CF_ flags */
145		172
146	/* optionally saved, might be zero */	173	/* optionally saved, might be zero */
147	AV *defav;	174	AV defav; / @_ */
148	SV *defsv;	175	SV defsv; / $_ */
149	SV *errsv;	176	SV errsv; / $@ */
		177	SV irssv; / $/ */
		178	SV irssv_sv; / real $/ cache */
150		179
151	#define VAR(name,type) type name;	180	#define VAR(name,type) type name;
152	# include "state.h"	181	# include "state.h"
153	#undef VAR	182	#undef VAR
154		183
…		…
156	int prio;	185	int prio;
157	};	186	};
158		187
159	typedef struct coro *Coro__State;	188	typedef struct coro *Coro__State;
160	typedef struct coro *Coro__State_or_hashref;	189	typedef struct coro *Coro__State_or_hashref;
		190
		191	/ Coro ******************************************************************/
		192
		193	#define PRIO_MAX 3
		194	#define PRIO_HIGH 1
		195	#define PRIO_NORMAL 0
		196	#define PRIO_LOW -1
		197	#define PRIO_IDLE -3
		198	#define PRIO_MIN -4
		199
		200	/* for Coro.pm */
		201	static SV *coro_current;
		202	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		203	static int coro_nready;
		204
		205	/ lowlevel stuff ********************************************************/
161		206
162	static AV *	207	static AV *
163	coro_clone_padlist (CV *cv)	208	coro_clone_padlist (CV *cv)
164	{	209	{
165	AV *padlist = CvPADLIST (cv);	210	AV *padlist = CvPADLIST (cv);
…		…
240		285
241	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	286	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
242	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	287	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
243	else	288	else
244	{	289	{
245	#if 0	290	#if PREFER_PERL_FUNCTIONS
246	/* this is probably cleaner, but also slower? */	291	/* this is probably cleaner, but also slower? */
247	CV *cp = Perl_cv_clone (cv);	292	CV *cp = Perl_cv_clone (cv);
248	CvPADLIST (cv) = CvPADLIST (cp);	293	CvPADLIST (cv) = CvPADLIST (cp);
249	CvPADLIST (cp) = 0;	294	CvPADLIST (cp) = 0;
250	SvREFCNT_dec (cp);	295	SvREFCNT_dec (cp);
…		…
274	av_extend (av, AvMAX (av) + 1);	319	av_extend (av, AvMAX (av) + 1);
275		320
276	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	321	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
277	}	322	}
278		323
		324	/ load & save, init *****************************************************/
		325
279	#define SB do {	326	#define SB do {
280	#define SE } while (0)	327	#define SE } while (0)
281		328
282	#define LOAD(state) load_state((state));
283	#define SAVE(state,flags) save_state((state),(flags));
284
285	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	329	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
286		330
287	static void	331	static void
288	load_state(Coro__State c)	332	load_perl (Coro__State c)
289	{	333	{
290	#define VAR(name,type) PL_ ## name = c->name;	334	#define VAR(name,type) PL_ ## name = c->name;
291	# include "state.h"	335	# include "state.h"
292	#undef VAR	336	#undef VAR
293		337
294	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	338	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
295	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	339	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
296	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	340	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		341	if (c->irssv)
		342	{
		343	if (c->irssv == PL_rs \|\| sv_eq (PL_rs, c->irssv))
		344	SvREFCNT_dec (c->irssv);
		345	else
		346	{
		347	REPLACE_SV (PL_rs, c->irssv);
		348	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		349	sv_setsv (c->irssv_sv, PL_rs);
		350	}
		351	}
297		352
298	{	353	{
299	dSP;	354	dSP;
300	CV *cv;	355	CV *cv;
301		356
…		…
310	PUTBACK;	365	PUTBACK;
311	}	366	}
312	}	367	}
313		368
314	static void	369	static void
315	save_state(Coro__State c, int flags)	370	save_perl (Coro__State c)
316	{	371	{
317	{	372	{
318	dSP;	373	dSP;
319	I32 cxix = cxstack_ix;	374	I32 cxix = cxstack_ix;
320	PERL_CONTEXT *ccstk = cxstack;	375	PERL_CONTEXT *ccstk = cxstack;
…		…
323	/*	378	/*
324	* the worst thing you can imagine happens first - we have to save	379	* the worst thing you can imagine happens first - we have to save
325	* (and reinitialize) all cv's in the whole callchain :(	380	* (and reinitialize) all cv's in the whole callchain :(
326	*/	381	*/
327		382
		383	EXTEND (SP, 3 + 1);
328	PUSHs (Nullsv);	384	PUSHs (Nullsv);
329	/* this loop was inspired by pp_caller */	385	/* this loop was inspired by pp_caller */
330	for (;;)	386	for (;;)
331	{	387	{
332	while (cxix >= 0)	388	while (cxix >= 0)
333	{	389	{
334	PERL_CONTEXT *cx = &ccstk[cxix--];	390	PERL_CONTEXT *cx = &ccstk[cxix--];
335		391
336	if (CxTYPE(cx) == CXt_SUB)	392	if (CxTYPE (cx) == CXt_SUB)
337	{	393	{
338	CV *cv = cx->blk_sub.cv;	394	CV *cv = cx->blk_sub.cv;
339		395
340	if (CvDEPTH (cv))	396	if (CvDEPTH (cv))
341	{	397	{
342	EXTEND (SP, 3);	398	EXTEND (SP, 3);
343
344	PUSHs ((SV *)CvPADLIST(cv));	399	PUSHs ((SV *)CvPADLIST (cv));
345	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	400	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
346	PUSHs ((SV *)cv);	401	PUSHs ((SV *)cv);
347		402
348	CvDEPTH (cv) = 0;	403	CvDEPTH (cv) = 0;
349	get_padlist (cv);	404	get_padlist (cv);
350	}	405	}
351	}	406	}
352	#ifdef CXt_FORMAT
353	else if (CxTYPE(cx) == CXt_FORMAT)
354	{
355	/* I never used formats, so how should I know how these are implemented? */
356	/* my bold guess is as a simple, plain sub... */
357	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
358	}
359	#endif
360	}	407	}
361		408
362	if (top_si->si_type == PERLSI_MAIN)	409	if (top_si->si_type == PERLSI_MAIN)
363	break;	410	break;
364		411
…		…
368	}	415	}
369		416
370	PUTBACK;	417	PUTBACK;
371	}	418	}
372		419
373	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	420	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
374	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	421	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
375	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	422	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		423	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
376		424
377	#define VAR(name,type)c->name = PL_ ## name;	425	#define VAR(name,type)c->name = PL_ ## name;
378	# include "state.h"	426	# include "state.h"
379	#undef VAR	427	#undef VAR
380	}	428	}
…		…
383	* allocate various perl stacks. This is an exact copy	431	* allocate various perl stacks. This is an exact copy
384	* of perl.c:init_stacks, except that it uses less memory	432	* of perl.c:init_stacks, except that it uses less memory
385	* on the (sometimes correct) assumption that coroutines do	433	* on the (sometimes correct) assumption that coroutines do
386	* not usually need a lot of stackspace.	434	* not usually need a lot of stackspace.
387	*/	435	*/
		436	#if PREFER_PERL_FUNCTIONS
		437	# define coro_init_stacks init_stacks
		438	#else
388	static void	439	static void
389	coro_init_stacks ()	440	coro_init_stacks ()
390	{	441	{
391	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	442	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
392	PL_curstackinfo->si_type = PERLSI_MAIN;	443	PL_curstackinfo->si_type = PERLSI_MAIN;
393	PL_curstack = PL_curstackinfo->si_stack;	444	PL_curstack = PL_curstackinfo->si_stack;
394	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	445	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
395		446
396	PL_stack_base = AvARRAY(PL_curstack);	447	PL_stack_base = AvARRAY(PL_curstack);
397	PL_stack_sp = PL_stack_base;	448	PL_stack_sp = PL_stack_base;
398	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	449	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
399		450
400	New(50,PL_tmps_stack,96,SV*);	451	New(50,PL_tmps_stack,128,SV*);
401	PL_tmps_floor = -1;	452	PL_tmps_floor = -1;
402	PL_tmps_ix = -1;	453	PL_tmps_ix = -1;
403	PL_tmps_max = 96;	454	PL_tmps_max = 128;
404		455
405	New(54,PL_markstack,16,I32);	456	New(54,PL_markstack,32,I32);
406	PL_markstack_ptr = PL_markstack;	457	PL_markstack_ptr = PL_markstack;
407	PL_markstack_max = PL_markstack + 16;	458	PL_markstack_max = PL_markstack + 32;
408		459
409	#ifdef SET_MARK_OFFSET	460	#ifdef SET_MARK_OFFSET
410	SET_MARK_OFFSET;	461	SET_MARK_OFFSET;
411	#endif	462	#endif
412		463
413	New(54,PL_scopestack,16,I32);	464	New(54,PL_scopestack,32,I32);
414	PL_scopestack_ix = 0;	465	PL_scopestack_ix = 0;
415	PL_scopestack_max = 16;	466	PL_scopestack_max = 32;
416		467
417	New(54,PL_savestack,96,ANY);	468	New(54,PL_savestack,64,ANY);
418	PL_savestack_ix = 0;	469	PL_savestack_ix = 0;
419	PL_savestack_max = 96;	470	PL_savestack_max = 64;
420		471
421	#if !PERL_VERSION_ATLEAST (5,9,0)	472	#if !PERL_VERSION_ATLEAST (5,9,0)
422	New(54,PL_retstack,8,OP*);	473	New(54,PL_retstack,16,OP*);
423	PL_retstack_ix = 0;	474	PL_retstack_ix = 0;
424	PL_retstack_max = 8;	475	PL_retstack_max = 16;
425	#endif	476	#endif
426	}	477	}
		478	#endif
427		479
428	/*	480	/*
429	* destroy the stacks, the callchain etc...	481	* destroy the stacks, the callchain etc...
430	*/	482	*/
431	static void	483	static void
432	coro_destroy_stacks ()	484	coro_destroy_stacks ()
433	{	485	{
434	if (!IN_DESTRUCT)	486	if (!IN_DESTRUCT)
435	{	487	{
436	/* is this ugly, I ask? */	488	/* restore all saved variables and stuff */
437	LEAVE_SCOPE (0);	489	LEAVE_SCOPE (0);
		490	assert (PL_tmps_floor == -1);
438		491
439	/* sure it is, but more important: is it correct?? :/ */	492	/* free all temporaries */
440	FREETMPS;	493	FREETMPS;
		494	assert (PL_tmps_ix == -1);
441		495
		496	/* unwind all extra stacks */
442	/POPSTACK_TO (PL_mainstack);//D//use/	497	POPSTACK_TO (PL_mainstack);
		498
		499	/* unwind main stack */
		500	dounwind (-1);
443	}	501	}
444		502
445	while (PL_curstackinfo->si_next)	503	while (PL_curstackinfo->si_next)
446	PL_curstackinfo = PL_curstackinfo->si_next;	504	PL_curstackinfo = PL_curstackinfo->si_next;
447		505
448	while (PL_curstackinfo)	506	while (PL_curstackinfo)
449	{	507	{
450	PERL_SI *p = PL_curstackinfo->si_prev;	508	PERL_SI *p = PL_curstackinfo->si_prev;
451		509
452	{ /D//remove/
453	dSP;
454	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
455	PUTBACK; /* possibly superfluous */
456	}
457
458	if (!IN_DESTRUCT)	510	if (!IN_DESTRUCT)
459	{
460	dounwind (-1);/D//remove/
461	SvREFCNT_dec (PL_curstackinfo->si_stack);	511	SvREFCNT_dec (PL_curstackinfo->si_stack);
462	}
463		512
464	Safefree (PL_curstackinfo->si_cxstack);	513	Safefree (PL_curstackinfo->si_cxstack);
465	Safefree (PL_curstackinfo);	514	Safefree (PL_curstackinfo);
466	PL_curstackinfo = p;	515	PL_curstackinfo = p;
467	}	516	}
…		…
473	#if !PERL_VERSION_ATLEAST (5,9,0)	522	#if !PERL_VERSION_ATLEAST (5,9,0)
474	Safefree (PL_retstack);	523	Safefree (PL_retstack);
475	#endif	524	#endif
476	}	525	}
477		526
		527	/ coroutine stack handling **********************************************/
		528
478	static void	529	static void
479	setup_coro (struct coro *coro)	530	setup_coro (struct coro *coro)
480	{	531	{
481	/*	532	/*
482	* emulate part of the perl startup here.	533	* emulate part of the perl startup here.
483	*/	534	*/
484		535
485	coro_init_stacks ();	536	coro_init_stacks ();
486		537
487	PL_curcop = 0;	538	PL_curcop = &PL_compiling;
488	PL_in_eval = 0;	539	PL_in_eval = EVAL_NULL;
489	PL_curpm = 0;	540	PL_curpm = 0;
		541	PL_localizing = 0;
		542	PL_dirty = 0;
		543	PL_restartop = 0;
490		544
491	{	545	{
492	dSP;	546	dSP;
493	LOGOP myop;	547	LOGOP myop;
494		548
495	/* I have no idea why this is needed, but it is */
496	PUSHMARK (SP);
497
498	SvREFCNT_dec (GvAV (PL_defgv));	549	SvREFCNT_dec (GvAV (PL_defgv));
499	GvAV (PL_defgv) = coro->args; coro->args = 0;	550	GvAV (PL_defgv) = coro->args; coro->args = 0;
500		551
501	Zero (&myop, 1, LOGOP);	552	Zero (&myop, 1, LOGOP);
502	myop.op_next = Nullop;	553	myop.op_next = Nullop;
503	myop.op_flags = OPf_WANT_VOID;	554	myop.op_flags = OPf_WANT_VOID;
504		555
505	PL_op = (OP *)&myop;
506
507	PUSHMARK (SP);	556	PUSHMARK (SP);
508	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));	557	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
509	PUTBACK;	558	PUTBACK;
		559	PL_op = (OP *)&myop;
510	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	560	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
511	SPAGAIN;	561	SPAGAIN;
512
513	ENTER; /* necessary e.g. for dounwind */
514	}	562	}
		563
		564	ENTER; /* necessary e.g. for dounwind */
515	}	565	}
516		566
517	static void	567	static void
518	free_coro_mortal ()	568	free_coro_mortal ()
519	{	569	{
…		…
522	SvREFCNT_dec (coro_mortal);	572	SvREFCNT_dec (coro_mortal);
523	coro_mortal = 0;	573	coro_mortal = 0;
524	}	574	}
525	}	575	}
526		576
		577	/* inject a fake call to Coro::State::_cctx_init into the execution */
527	static void NOINLINE	578	static void NOINLINE
528	prepare_cctx (coro_cctx *cctx)	579	prepare_cctx (coro_cctx *cctx)
529	{	580	{
530	dSP;	581	dSP;
531	LOGOP myop;	582	LOGOP myop;
532		583
533	Zero (&myop, 1, LOGOP);	584	Zero (&myop, 1, LOGOP);
534	myop.op_next = PL_op;	585	myop.op_next = PL_op;
535	myop.op_flags = OPf_WANT_VOID;	586	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
536
537	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
538		587
539	PUSHMARK (SP);	588	PUSHMARK (SP);
		589	EXTEND (SP, 2);
		590	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
540	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	591	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
541	PUTBACK;	592	PUTBACK;
		593	PL_op = (OP *)&myop;
542	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	594	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
543	SPAGAIN;	595	SPAGAIN;
544	}	596	}
545		597
546	static void	598	static void
547	coro_run (void *arg)	599	coro_run (void *arg)
548	{	600	{
549	/* coro_run is the alternative epilogue of transfer() */	601	/* coro_run is the alternative tail of transfer(), so unlock here. */
550	UNLOCK;	602	UNLOCK;
551		603
552	/*	604	/*
553	* this is a _very_ stripped down perl interpreter ;)	605	* this is a _very_ stripped down perl interpreter ;)
554	*/	606	*/
…		…
556		608
557	/* inject call to cctx_init */	609	/* inject call to cctx_init */
558	prepare_cctx ((coro_cctx *)arg);	610	prepare_cctx ((coro_cctx *)arg);
559		611
560	/* somebody will hit me for both perl_run and PL_restartop */	612	/* somebody will hit me for both perl_run and PL_restartop */
		613	PL_restartop = PL_op;
561	perl_run (PL_curinterp);	614	perl_run (PL_curinterp);
562		615
563	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	616	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
564	abort ();	617	abort ();
565	}	618	}
…		…
569	{	622	{
570	coro_cctx *cctx;	623	coro_cctx *cctx;
571		624
572	++cctx_count;	625	++cctx_count;
573		626
574	New (0, cctx, 1, coro_cctx);	627	Newz (0, cctx, 1, coro_cctx);
575		628
576	#if HAVE_MMAP	629	#if HAVE_MMAP
577		630
578	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	631	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
579	/* mmap suppsedly does allocate-on-write for us */	632	/* mmap supposedly does allocate-on-write for us */
580	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);	633	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
581		634
582	if (cctx->sptr == (void *)-1)	635	if (cctx->sptr == (void *)-1)
583	{	636	{
584	perror ("FATAL: unable to mmap stack for coroutine");	637	perror ("FATAL: unable to mmap stack for coroutine");
…		…
613		666
614	return cctx;	667	return cctx;
615	}	668	}
616		669
617	static void	670	static void
618	cctx_free (coro_cctx *cctx)	671	cctx_destroy (coro_cctx *cctx)
619	{	672	{
620	if (!cctx)	673	if (!cctx)
621	return;	674	return;
622		675
623	--cctx_count;	676	--cctx_count;
…		…
640	{	693	{
641	coro_cctx *cctx;	694	coro_cctx *cctx;
642		695
643	if (cctx_first)	696	if (cctx_first)
644	{	697	{
645	--cctx_idle;
646	cctx = cctx_first;	698	cctx = cctx_first;
647	cctx_first = cctx->next;	699	cctx_first = cctx->next;
		700	--cctx_idle;
648	}	701	}
649	else	702	else
650	{	703	{
651	cctx = cctx_new ();	704	cctx = cctx_new ();
652	PL_op = PL_op->op_next;	705	PL_op = PL_op->op_next;
…		…
656	}	709	}
657		710
658	static void	711	static void
659	cctx_put (coro_cctx *cctx)	712	cctx_put (coro_cctx *cctx)
660	{	713	{
		714	/* free another cctx if overlimit */
		715	if (cctx_idle >= MAX_IDLE_CCTX)
		716	{
		717	coro_cctx *first = cctx_first;
		718	cctx_first = first->next;
		719	--cctx_idle;
		720
		721	assert (!first->inuse);
		722	cctx_destroy (first);
		723	}
		724
661	++cctx_idle;	725	++cctx_idle;
662	cctx->next = cctx_first;	726	cctx->next = cctx_first;
663	cctx_first = cctx;	727	cctx_first = cctx;
664	}	728	}
665		729
		730	/ coroutine switching ***************************************************/
		731
666	/* never call directly, always through the coro_state_transfer global variable */	732	/* never call directly, always through the coro_state_transfer global variable */
667	static void NOINLINE	733	static void NOINLINE
668	transfer (struct coro prev, struct coro next, int flags)	734	transfer (struct coro prev, struct coro next)
669	{	735	{
670	dSTACKLEVEL;	736	dSTACKLEVEL;
671		737
672	/* sometimes transfer is only called to set idle_sp */	738	/* sometimes transfer is only called to set idle_sp */
673	if (flags == TRANSFER_SET_STACKLEVEL)	739	if (!next)
		740	{
674	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	741	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		742	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
		743	}
675	else if (prev != next)	744	else if (prev != next)
676	{	745	{
677	coro_cctx *prev__cctx;	746	coro_cctx *prev__cctx;
678		747
679	if (!prev->cctx)	748	if (prev->flags & CF_NEW)
680	{	749	{
681	/* create a new empty context */	750	/* create a new empty context */
682	Newz (0, prev->cctx, 1, coro_cctx);	751	Newz (0, prev->cctx, 1, coro_cctx);
683	prev->cctx->inuse = 1;	752	prev->cctx->inuse = 1;
		753	prev->flags &= ~CF_NEW;
684	prev->flags \|= CF_RUNNING;	754	prev->flags \|= CF_RUNNING;
685	}	755	}
686		756
		757	/TODO: must not croak here /
687	if (!prev->flags & CF_RUNNING)	758	if (!prev->flags & CF_RUNNING)
688	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");	759	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
689		760
690	if (next->flags & CF_RUNNING)	761	if (next->flags & CF_RUNNING)
691	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");	762	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
692		763
		764	if (next->flags & CF_DESTROYED)
		765	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		766
693	prev->flags &= ~CF_RUNNING;	767	prev->flags &= ~CF_RUNNING;
694	next->flags \|= CF_RUNNING;	768	next->flags \|= CF_RUNNING;
695		769
696	LOCK;	770	LOCK;
697		771
698	if (next->mainstack)	772	if (next->flags & CF_NEW)
699	{	773	{
700	/* coroutine already started */	774	/* need to start coroutine */
701	SAVE (prev, flags);	775	next->flags &= ~CF_NEW;
702	LOAD (next);	776	/* first get rid of the old state */
		777	save_perl (prev);
		778	/* setup coroutine call */
		779	setup_coro (next);
		780	/* need a new stack */
		781	assert (!next->cctx);
703	}	782	}
704	else	783	else
705	{	784	{
706	/* need to start coroutine */	785	/* coroutine already started */
707	/* first get rid of the old state */	786	save_perl (prev);
708	SAVE (prev, -1);	787	load_perl (next);
709	/* setup coroutine call */
710	setup_coro (next);
711	/* need a new stack */
712	assert (!next->stack);
713	}	788	}
714		789
715	prev__cctx = prev->cctx;	790	prev__cctx = prev->cctx;
716		791
717	/* possibly "free" the cctx */	792	/* possibly "free" the cctx */
718	if (prev__cctx->idle_sp == STACKLEVEL)	793	if (prev__cctx->idle_sp == STACKLEVEL)
719	{	794	{
720	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	795	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
721	assert (PL_top_env == prev__cctx->top_env);	796	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		797
		798	prev->cctx = 0;
722		799
723	cctx_put (prev__cctx);	800	cctx_put (prev__cctx);
724	prev->cctx = 0;	801	prev__cctx->inuse = 0;
725	}	802	}
726		803
727	if (!next->cctx)	804	if (!next->cctx)
		805	{
728	next->cctx = cctx_get ();	806	next->cctx = cctx_get ();
		807	assert (!next->cctx->inuse);
		808	next->cctx->inuse = 1;
		809	}
729		810
730	if (prev__cctx != next->cctx)	811	if (prev__cctx != next->cctx)
731	{	812	{
732	assert ( prev__cctx->inuse);
733	assert (!next->cctx->inuse);
734
735	prev__cctx->inuse = 0;
736	next->cctx->inuse = 1;
737
738	prev__cctx->top_env = PL_top_env;	813	prev__cctx->top_env = PL_top_env;
739	PL_top_env = next->cctx->top_env;	814	PL_top_env = next->cctx->top_env;
740	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	815	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
741	}	816	}
742		817
743	free_coro_mortal ();	818	free_coro_mortal ();
744
745	UNLOCK;	819	UNLOCK;
746	}	820	}
747	}	821	}
748		822
749	struct transfer_args	823	struct transfer_args
750	{	824	{
751	struct coro prev, next;	825	struct coro prev, next;
752	int flags;
753	};	826	};
754		827
755	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	828	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
756		829
		830	/ high level stuff ******************************************************/
		831
757	static void	832	static int
758	coro_state_destroy (struct coro *coro)	833	coro_state_destroy (struct coro *coro)
759	{	834	{
760	if (coro->refcnt--)	835	if (coro->flags & CF_DESTROYED)
761	return;	836	return 0;
762		837
		838	coro->flags \|= CF_DESTROYED;
		839
763	if (coro->flags & CF_RUNNING)	840	if (coro->flags & CF_READY)
764	croak ("FATAL: tried to destroy currently running coroutine");	841	{
		842	/* reduce nready, as destroying a ready coro effectively unreadies it */
		843	/* alternative: look through all ready queues and remove the coro */
		844	LOCK;
		845	--coro_nready;
		846	UNLOCK;
		847	}
		848	else
		849	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
765		850
766	if (coro->mainstack && coro->mainstack != main_mainstack)	851	if (coro->mainstack && coro->mainstack != main_mainstack)
767	{	852	{
768	struct coro temp;	853	struct coro temp;
769		854
770	SAVE ((&temp), TRANSFER_SAVE_ALL);	855	assert (!(coro->flags & CF_RUNNING));
771	LOAD (coro);	856
		857	Zero (&temp, 1, struct coro);
		858	temp.save = CORO_SAVE_ALL;
		859
		860	if (coro->flags & CF_RUNNING)
		861	croak ("FATAL: tried to destroy currently running coroutine");
		862
		863	save_perl (&temp);
		864	load_perl (coro);
772		865
773	coro_destroy_stacks ();	866	coro_destroy_stacks ();
774		867
775	LOAD ((&temp)); /* this will get rid of defsv etc.. */	868	load_perl (&temp); /* this will get rid of defsv etc.. */
776		869
777	coro->mainstack = 0;	870	coro->mainstack = 0;
778	}	871	}
779		872
780	cctx_free (coro->cctx);	873	cctx_destroy (coro->cctx);
781	SvREFCNT_dec (coro->args);	874	SvREFCNT_dec (coro->args);
782	Safefree (coro);	875
		876	return 1;
783	}	877	}
784		878
785	static int	879	static int
786	coro_state_clear (pTHX_ SV sv, MAGIC mg)	880	coro_state_free (pTHX_ SV sv, MAGIC mg)
787	{	881	{
788	struct coro coro = (struct coro )mg->mg_ptr;	882	struct coro coro = (struct coro )mg->mg_ptr;
789	mg->mg_ptr = 0;	883	mg->mg_ptr = 0;
790		884
		885	if (--coro->refcnt < 0)
		886	{
791	coro_state_destroy (coro);	887	coro_state_destroy (coro);
		888	Safefree (coro);
		889	}
792		890
793	return 0;	891	return 0;
794	}	892	}
795		893
796	static int	894	static int
…		…
803	return 0;	901	return 0;
804	}	902	}
805		903
806	static MGVTBL coro_state_vtbl = {	904	static MGVTBL coro_state_vtbl = {
807	0, 0, 0, 0,	905	0, 0, 0, 0,
808	coro_state_clear,	906	coro_state_free,
809	0,	907	0,
810	#ifdef MGf_DUP	908	#ifdef MGf_DUP
811	coro_state_dup,	909	coro_state_dup,
812	#else	910	#else
813	# define MGf_DUP 0	911	# define MGf_DUP 0
…		…
835	assert (mg->mg_type == PERL_MAGIC_ext);	933	assert (mg->mg_type == PERL_MAGIC_ext);
836	return (struct coro *)mg->mg_ptr;	934	return (struct coro *)mg->mg_ptr;
837	}	935	}
838		936
839	static void	937	static void
840	prepare_transfer (struct transfer_args ta, SV prev, SV *next, int flags)	938	prepare_transfer (struct transfer_args ta, SV prev_sv, SV *next_sv)
841	{	939	{
842	ta->prev = SvSTATE (prev);	940	ta->prev = SvSTATE (prev_sv);
843	ta->next = SvSTATE (next);	941	ta->next = SvSTATE (next_sv);
844	ta->flags = flags;
845	}	942	}
846		943
847	static void	944	static void
848	api_transfer (SV prev, SV next, int flags)	945	api_transfer (SV prev_sv, SV next_sv)
849	{	946	{
850	dTHX;
851	struct transfer_args ta;	947	struct transfer_args ta;
852		948
853	prepare_transfer (&ta, prev, next, flags);	949	prepare_transfer (&ta, prev_sv, next_sv);
854	TRANSFER (ta);	950	TRANSFER (ta);
855	}	951	}
856		952
		953	static int
		954	api_save (SV *coro_sv, int new_save)
		955	{
		956	struct coro *coro = SvSTATE (coro_sv);
		957	int old_save = coro->save;
		958
		959	if (new_save >= 0)
		960	coro->save = new_save;
		961
		962	return old_save;
		963	}
		964
857	/ Coro ******************************************************************/	965	/ Coro ******************************************************************/
858		966
859	#define PRIO_MAX 3
860	#define PRIO_HIGH 1
861	#define PRIO_NORMAL 0
862	#define PRIO_LOW -1
863	#define PRIO_IDLE -3
864	#define PRIO_MIN -4
865
866	/* for Coro.pm */
867	static GV coro_current, coro_idle;
868	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
869	static int coro_nready;
870
871	static void	967	static void
872	coro_enq (SV *coro_sv)	968	coro_enq (SV *coro_sv)
873	{	969	{
874	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	970	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
875	coro_nready++;
876	}	971	}
877		972
878	static SV *	973	static SV *
879	coro_deq (int min_prio)	974	coro_deq (int min_prio)
880	{	975	{
…		…
884	if (min_prio < 0)	979	if (min_prio < 0)
885	min_prio = 0;	980	min_prio = 0;
886		981
887	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	982	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
888	if (AvFILLp (coro_ready [prio]) >= 0)	983	if (AvFILLp (coro_ready [prio]) >= 0)
889	{
890	coro_nready--;
891	return av_shift (coro_ready [prio]);	984	return av_shift (coro_ready [prio]);
892	}
893		985
894	return 0;	986	return 0;
895	}	987	}
896		988
897	static int	989	static int
…		…
905	coro = SvSTATE (coro_sv);	997	coro = SvSTATE (coro_sv);
906		998
907	if (coro->flags & CF_READY)	999	if (coro->flags & CF_READY)
908	return 0;	1000	return 0;
909		1001
910	if (coro->flags & CF_RUNNING)
911	croak ("Coro::ready called on currently running coroutine");
912
913	coro->flags \|= CF_READY;	1002	coro->flags \|= CF_READY;
914		1003
915	LOCK;	1004	LOCK;
916	coro_enq (SvREFCNT_inc (coro_sv));	1005	coro_enq (SvREFCNT_inc (coro_sv));
		1006	++coro_nready;
917	UNLOCK;	1007	UNLOCK;
918		1008
919	return 1;	1009	return 1;
920	}	1010	}
921		1011
922	static int	1012	static int
923	api_is_ready (SV *coro_sv)	1013	api_is_ready (SV *coro_sv)
924	{	1014	{
925	return !!SvSTATE (coro_sv)->flags & CF_READY;	1015	return !!(SvSTATE (coro_sv)->flags & CF_READY);
926	}	1016	}
927		1017
928	static void	1018	static void
929	prepare_schedule (struct transfer_args *ta)	1019	prepare_schedule (struct transfer_args *ta)
930	{	1020	{
931	SV current, prev, *next;	1021	SV prev_sv, next_sv;
932
933	current = GvSV (coro_current);
934		1022
935	for (;;)	1023	for (;;)
936	{	1024	{
937	LOCK;	1025	LOCK;
938	next = coro_deq (PRIO_MIN);	1026	next_sv = coro_deq (PRIO_MIN);
		1027
		1028	/* nothing to schedule: call the idle handler */
		1029	if (!next_sv)
		1030	{
		1031	dSP;
		1032	UNLOCK;
		1033
		1034	ENTER;
		1035	SAVETMPS;
		1036
		1037	PUSHMARK (SP);
		1038	PUTBACK;
		1039	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1040
		1041	FREETMPS;
		1042	LEAVE;
		1043	continue;
		1044	}
		1045
		1046	ta->next = SvSTATE (next_sv);
		1047
		1048	/* cannot transfer to destroyed coros, skip and look for next */
		1049	if (ta->next->flags & CF_DESTROYED)
		1050	{
		1051	UNLOCK;
		1052	SvREFCNT_dec (next_sv);
		1053	/* coro_nready is already taken care of by destroy */
		1054	continue;
		1055	}
		1056
		1057	--coro_nready;
939	UNLOCK;	1058	UNLOCK;
940
941	if (next)
942	break;	1059	break;
943
944	{
945	dSP;
946
947	ENTER;
948	SAVETMPS;
949
950	PUSHMARK (SP);
951	PUTBACK;
952	call_sv (GvSV (coro_idle), G_DISCARD);
953
954	FREETMPS;
955	LEAVE;
956	}	1060	}
957	}
958
959	prev = SvRV (current);
960	SvRV (current) = next;
961		1061
962	/* free this only after the transfer */	1062	/* free this only after the transfer */
		1063	prev_sv = SvRV (coro_current);
		1064	SvRV_set (coro_current, next_sv);
		1065	ta->prev = SvSTATE (prev_sv);
		1066
		1067	assert (ta->next->flags & CF_READY);
		1068	ta->next->flags &= ~CF_READY;
		1069
963	LOCK;	1070	LOCK;
964	free_coro_mortal ();	1071	free_coro_mortal ();
		1072	coro_mortal = prev_sv;
965	UNLOCK;	1073	UNLOCK;
966	coro_mortal = prev;
967
968	ta->prev = SvSTATE (prev);
969	ta->next = SvSTATE (next);
970	ta->flags = TRANSFER_SAVE_ALL;
971
972	ta->next->flags &= ~CF_READY;
973	}	1074	}
974		1075
975	static void	1076	static void
976	prepare_cede (struct transfer_args *ta)	1077	prepare_cede (struct transfer_args *ta)
977	{	1078	{
978	api_ready (GvSV (coro_current));	1079	api_ready (coro_current);
979
980	prepare_schedule (ta);	1080	prepare_schedule (ta);
981	}	1081	}
982		1082
		1083	static int
		1084	prepare_cede_notself (struct transfer_args *ta)
		1085	{
		1086	if (coro_nready)
		1087	{
		1088	SV *prev = SvRV (coro_current);
		1089	prepare_schedule (ta);
		1090	api_ready (prev);
		1091	return 1;
		1092	}
		1093	else
		1094	return 0;
		1095	}
		1096
983	static void	1097	static void
984	api_schedule (void)	1098	api_schedule (void)
985	{	1099	{
986	dTHX;
987	struct transfer_args ta;	1100	struct transfer_args ta;
988		1101
989	prepare_schedule (&ta);	1102	prepare_schedule (&ta);
990	TRANSFER (ta);	1103	TRANSFER (ta);
991	}	1104	}
992		1105
993	static void	1106	static int
994	api_cede (void)	1107	api_cede (void)
995	{	1108	{
996	dTHX;
997	struct transfer_args ta;	1109	struct transfer_args ta;
998		1110
999	prepare_cede (&ta);	1111	prepare_cede (&ta);
		1112
		1113	if (ta.prev != ta.next)
		1114	{
1000	TRANSFER (ta);	1115	TRANSFER (ta);
		1116	return 1;
		1117	}
		1118	else
		1119	return 0;
		1120	}
		1121
		1122	static int
		1123	api_cede_notself (void)
		1124	{
		1125	struct transfer_args ta;
		1126
		1127	if (prepare_cede_notself (&ta))
		1128	{
		1129	TRANSFER (ta);
		1130	return 1;
		1131	}
		1132	else
		1133	return 0;
1001	}	1134	}
1002		1135
1003	MODULE = Coro::State PACKAGE = Coro::State	1136	MODULE = Coro::State PACKAGE = Coro::State
1004		1137
1005	PROTOTYPES: DISABLE	1138	PROTOTYPES: DISABLE
…		…
1011	#endif	1144	#endif
1012	BOOT_PAGESIZE;	1145	BOOT_PAGESIZE;
1013		1146
1014	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1147	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1015		1148
1016	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1149	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1017	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1150	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1018	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1151	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1152	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1153	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1019		1154
1020	main_mainstack = PL_mainstack;	1155	main_mainstack = PL_mainstack;
1021		1156
1022	coroapi.ver = CORO_API_VERSION;	1157	coroapi.ver = CORO_API_VERSION;
1023	coroapi.transfer = api_transfer;	1158	coroapi.transfer = api_transfer;
…		…
1033	HV *hv;	1168	HV *hv;
1034	int i;	1169	int i;
1035		1170
1036	Newz (0, coro, 1, struct coro);	1171	Newz (0, coro, 1, struct coro);
1037	coro->args = newAV ();	1172	coro->args = newAV ();
		1173	coro->save = CORO_SAVE_ALL;
		1174	coro->flags = CF_NEW;
1038		1175
1039	hv = newHV ();	1176	hv = newHV ();
1040	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;	1177	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
1041	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1178	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1042		1179
1043	for (i = 1; i < items; i++)	1180	for (i = 1; i < items; i++)
1044	av_push (coro->args, newSVsv (ST (i)));	1181	av_push (coro->args, newSVsv (ST (i)));
1045	}	1182	}
1046	OUTPUT:	1183	OUTPUT:
		1184	RETVAL
		1185
		1186	int
		1187	save (SV *coro, int new_save = -1)
		1188	CODE:
		1189	RETVAL = api_save (coro, new_save);
		1190	OUTPUT:
1047	RETVAL	1191	RETVAL
1048		1192
1049	void	1193	void
1050	_set_stacklevel (...)	1194	_set_stacklevel (...)
1051	ALIAS:	1195	ALIAS:
1052	Coro::State::transfer = 1	1196	Coro::State::transfer = 1
1053	Coro::schedule = 2	1197	Coro::schedule = 2
1054	Coro::cede = 3	1198	Coro::cede = 3
1055	Coro::Cont::yield = 4	1199	Coro::cede_notself = 4
1056	CODE:	1200	CODE:
1057	{	1201	{
1058	struct transfer_args ta;	1202	struct transfer_args ta;
1059		1203
1060	switch (ix)	1204	switch (ix)
1061	{	1205	{
1062	case 0:	1206	case 0:
1063	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));	1207	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
1064	ta.next = 0;	1208	ta.next = 0;
1065	ta.flags = TRANSFER_SET_STACKLEVEL;
1066	break;	1209	break;
1067		1210
1068	case 1:	1211	case 1:
1069	if (items != 3)	1212	if (items != 2)
1070	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1213	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1071		1214
1072	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1215	prepare_transfer (&ta, ST (0), ST (1));
1073	break;	1216	break;
1074		1217
1075	case 2:	1218	case 2:
1076	prepare_schedule (&ta);	1219	prepare_schedule (&ta);
1077	break;	1220	break;
…		…
1079	case 3:	1222	case 3:
1080	prepare_cede (&ta);	1223	prepare_cede (&ta);
1081	break;	1224	break;
1082		1225
1083	case 4:	1226	case 4:
1084	{	1227	if (!prepare_cede_notself (&ta))
1085	SV *yieldstack;	1228	XSRETURN_EMPTY;
1086	SV *sv;
1087	AV *defav = GvAV (PL_defgv);
1088		1229
1089	yieldstack = *hv_fetch (
1090	(HV *)SvRV (GvSV (coro_current)),
1091	"yieldstack", sizeof ("yieldstack") - 1,
1092	0
1093	);
1094
1095	/* set up @_ -- ugly */
1096	av_clear (defav);
1097	av_fill (defav, items - 1);
1098	while (items--)
1099	av_store (defav, items, SvREFCNT_inc (ST(items)));
1100
1101	sv = av_pop ((AV *)SvRV (yieldstack));
1102	ta.prev = SvSTATE (av_fetch ((AV )SvRV (sv), 0, 0));
1103	ta.next = SvSTATE (av_fetch ((AV )SvRV (sv), 1, 0));
1104	ta.flags = 0;
1105	SvREFCNT_dec (sv);
1106	}
1107	break;	1230	break;
1108
1109	}	1231	}
1110		1232
		1233	BARRIER;
1111	TRANSFER (ta);	1234	TRANSFER (ta);
1112	}
1113		1235
1114	void	1236	if (GIMME_V != G_VOID && ta.next != ta.prev)
1115	_clone_state_from (SV dst, SV src)	1237	XSRETURN_YES;
		1238	}
		1239
		1240	bool
		1241	_destroy (SV *coro_sv)
1116	CODE:	1242	CODE:
1117	{	1243	RETVAL = coro_state_destroy (SvSTATE (coro_sv));
1118	struct coro *coro_src = SvSTATE (src);	1244	OUTPUT:
1119		1245	RETVAL
1120	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1121
1122	++coro_src->refcnt;
1123	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags \|= MGf_DUP;
1124	}
1125		1246
1126	void	1247	void
1127	_exit (code)	1248	_exit (code)
1128	int code	1249	int code
1129	PROTOTYPE: $	1250	PROTOTYPE: $
…		…
1157	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1278	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1158	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1279	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1159	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1280	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1160	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1281	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1161		1282
1162	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1283	coro_current = get_sv ("Coro::current", FALSE);
1163	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1284	SvREADONLY_on (coro_current);
1164		1285
1165	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1286	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1166	coro_ready[i] = newAV ();	1287	coro_ready[i] = newAV ();
1167		1288
1168	{	1289	{
1169	SV *sv = perl_get_sv("Coro::API", 1);	1290	SV *sv = perl_get_sv("Coro::API", 1);
1170		1291
1171	coroapi.schedule = api_schedule;	1292	coroapi.schedule = api_schedule;
		1293	coroapi.save = api_save;
1172	coroapi.cede = api_cede;	1294	coroapi.cede = api_cede;
		1295	coroapi.cede_notself = api_cede_notself;
1173	coroapi.ready = api_ready;	1296	coroapi.ready = api_ready;
1174	coroapi.is_ready = api_is_ready;	1297	coroapi.is_ready = api_is_ready;
1175	coroapi.nready = &coro_nready;	1298	coroapi.nready = &coro_nready;
1176	coroapi.current = coro_current;	1299	coroapi.current = coro_current;
1177		1300
1178	GCoroAPI = &coroapi;	1301	GCoroAPI = &coroapi;
1179	sv_setiv (sv, (IV)&coroapi);	1302	sv_setiv (sv, (IV)&coroapi);
1180	SvREADONLY_on (sv);	1303	SvREADONLY_on (sv);
1181	}	1304	}
1182	}	1305	}
		1306
		1307	void
		1308	_set_current (SV *current)
		1309	PROTOTYPE: $
		1310	CODE:
		1311	SvREFCNT_dec (SvRV (coro_current));
		1312	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1183		1313
1184	int	1314	int
1185	prio (Coro::State coro, int newprio = 0)	1315	prio (Coro::State coro, int newprio = 0)
1186	ALIAS:	1316	ALIAS:
1187	nice = 1	1317	nice = 1
…		…
1190	RETVAL = coro->prio;	1320	RETVAL = coro->prio;
1191		1321
1192	if (items > 1)	1322	if (items > 1)
1193	{	1323	{
1194	if (ix)	1324	if (ix)
1195	newprio += coro->prio;	1325	newprio = coro->prio - newprio;
1196		1326
1197	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1327	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1198	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1328	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1199		1329
1200	coro->prio = newprio;	1330	coro->prio = newprio;
1201	}	1331	}
1202	}	1332	}
		1333	OUTPUT:
		1334	RETVAL
1203		1335
1204	SV *	1336	SV *
1205	ready (SV *self)	1337	ready (SV *self)
1206	PROTOTYPE: $	1338	PROTOTYPE: $
1207	CODE:	1339	CODE:
…		…
1229		1361
1230	SV *	1362	SV *
1231	_get_state ()	1363	_get_state ()
1232	CODE:	1364	CODE:
1233	{	1365	{
1234	struct {	1366	struct io_state *data;
1235	int errorno;
1236	int laststype;
1237	int laststatval;
1238	Stat_t statcache;
1239	} data;
1240		1367
		1368	RETVAL = newSV (sizeof (struct io_state));
		1369	data = (struct io_state *)SvPVX (RETVAL);
		1370	SvCUR_set (RETVAL, sizeof (struct io_state));
		1371	SvPOK_only (RETVAL);
		1372
1241	data.errorno = errno;	1373	data->errorno = errno;
1242	data.laststype = PL_laststype;	1374	data->laststype = PL_laststype;
1243	data.laststatval = PL_laststatval;	1375	data->laststatval = PL_laststatval;
1244	data.statcache = PL_statcache;	1376	data->statcache = PL_statcache;
1245
1246	RETVAL = newSVpvn ((char *)&data, sizeof data);
1247	}	1377	}
1248	OUTPUT:	1378	OUTPUT:
1249	RETVAL	1379	RETVAL
1250		1380
1251	void	1381	void
1252	_set_state (char *data_)	1382	_set_state (char *data_)
1253	PROTOTYPE: $	1383	PROTOTYPE: $
1254	CODE:	1384	CODE:
1255	{	1385	{
1256	struct {	1386	struct io_state data = (void )data_;
1257	int errorno;
1258	int laststype;
1259	int laststatval;
1260	Stat_t statcache;
1261	} data = (void )data_;
1262		1387
1263	errno = data->errorno;	1388	errno = data->errorno;
1264	PL_laststype = data->laststype;	1389	PL_laststype = data->laststype;
1265	PL_laststatval = data->laststatval;	1390	PL_laststatval = data->laststatval;
1266	PL_statcache = data->statcache;	1391	PL_statcache = data->statcache;
1267	}	1392	}
		1393

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Comparing Coro/Coro/State.xs (file contents): Revision 1.114 by root, Thu Nov 30 21:22:45 2006 UTC vs. Revision 1.140 by root, Sat Jan 20 19:52:15 2007 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.114 by root, Thu Nov 30 21:22:45 2006 UTC vs.
Revision 1.140 by root, Sat Jan 20 19:52:15 2007 UTC