[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 1.143 by root, Wed Feb 28 11:43:03 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 CORO_USE_VALGRIND
		37	# include <valgrind/valgrind.h>
		38	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		39	#else
		40	# define REGISTER_STACK(cctx,start,end)
		41	#endif
		42
		43	/* the maximum number of idle cctx that will be pooled */
		44	#define MAX_IDLE_CCTX 8
		45
		46	#define PERL_VERSION_ATLEAST(a,b,c) \
		47	(PERL_REVISION > (a) \
		48	\|\| (PERL_REVISION == (a) \
		49	&& (PERL_VERSION > (b) \
		50	\|\| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		51
		52	#if !PERL_VERSION_ATLEAST (5,6,0)
		53	# ifndef PL_ppaddr
		54	# define PL_ppaddr ppaddr
		55	# endif
		56	# ifndef call_sv
		57	# define call_sv perl_call_sv
		58	# endif
		59	# ifndef get_sv
		60	# define get_sv perl_get_sv
		61	# endif
		62	# ifndef get_cv
		63	# define get_cv perl_get_cv
		64	# endif
		65	# ifndef IS_PADGV
		66	# define IS_PADGV(v) 0
		67	# endif
		68	# ifndef IS_PADCONST
		69	# define IS_PADCONST(v) 0
		70	# endif
		71	#endif
		72
		73	/* 5.8.7 */
		74	#ifndef SvRV_set
		75	# define SvRV_set(s,v) SvRV(s) = (v)
		76	#endif
		77
		78	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		79	# undef CORO_STACKGUARD
		80	#endif
		81
		82	#ifndef CORO_STACKGUARD
		83	# define CORO_STACKGUARD 0
		84	#endif
		85
		86	/* prefer perl internal functions over our own? */
		87	#ifndef CORO_PREFER_PERL_FUNCTIONS
		88	# define CORO_PREFER_PERL_FUNCTIONS 0
		89	#endif
		90
74	/* The next macro should declare a variable stacklevel that contains and approximation	91	/* 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	92	* to the current C stack pointer. Its property is that it changes with each call
76	* and should be unique. */	93	* and should be unique. */
77	#define dSTACKLEVEL int stacklevel	94	#define dSTACKLEVEL int stacklevel
78	#define STACKLEVEL ((void *)&stacklevel)	95	#define STACKLEVEL ((void *)&stacklevel)
79		96
80	#define IN_DESTRUCT (PL_main_cv == Nullcv)	97	#define IN_DESTRUCT (PL_main_cv == Nullcv)
81		98
82	#if __GNUC__ >= 3	99	#if __GNUC__ >= 3
83	# define attribute(x) __attribute__(x)	100	# define attribute(x) __attribute__(x)
		101	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
84	#else	102	#else
85	# define attribute(x)	103	# define attribute(x)
		104	# define BARRIER
86	#endif	105	#endif
87		106
88	#define NOINLINE attribute ((noinline))	107	#define NOINLINE attribute ((noinline))
89		108
90	#include "CoroAPI.h"	109	#include "CoroAPI.h"
91
92	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
93		110
94	#ifdef USE_ITHREADS	111	#ifdef USE_ITHREADS
95	static perl_mutex coro_mutex;	112	static perl_mutex coro_mutex;
96	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	113	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
97	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	114	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
98	#else	115	#else
99	# define LOCK (void)0	116	# define LOCK (void)0
100	# define UNLOCK (void)0	117	# define UNLOCK (void)0
101	#endif	118	#endif
102		119
		120	/* helper storage struct for Coro::AIO */
		121	struct io_state
		122	{
		123	int errorno;
		124	I32 laststype;
		125	int laststatval;
		126	Stat_t statcache;
		127	};
		128
103	static struct CoroAPI coroapi;	129	static struct CoroAPI coroapi;
104	static AV main_mainstack; / used to differentiate between $main and others */	130	static AV main_mainstack; / used to differentiate between $main and others */
105	static HV coro_state_stash, coro_stash;	131	static HV coro_state_stash, coro_stash;
106	static SV coro_mortal; / will be freed after next transfer */	132	static SV coro_mortal; / will be freed after next transfer */
107		133
…		…
112	typedef struct coro_cctx {	138	typedef struct coro_cctx {
113	struct coro_cctx *next;	139	struct coro_cctx *next;
114		140
115	/* the stack */	141	/* the stack */
116	void *sptr;	142	void *sptr;
117	long ssize; /* positive == mmap, otherwise malloc */	143	ssize_t ssize; /* positive == mmap, otherwise malloc */
118		144
119	/* cpu state */	145	/* cpu state */
120	void idle_sp; / sp of top-level transfer/schedule/cede call */	146	void idle_sp; / sp of top-level transfer/schedule/cede call */
		147	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
121	JMPENV *top_env;	148	JMPENV *top_env;
122	coro_context cctx;	149	coro_context cctx;
123		150
124	int inuse;	151	int inuse;
125		152
126	#if USE_VALGRIND	153	#if CORO_USE_VALGRIND
127	int valgrind_id;	154	int valgrind_id;
128	#endif	155	#endif
129	} coro_cctx;	156	} coro_cctx;
130		157
131	enum {	158	enum {
132	CF_RUNNING, /* coroutine is running */	159	CF_RUNNING = 0x0001, /* coroutine is running */
133	CF_READY, /* coroutine is ready */	160	CF_READY = 0x0002, /* coroutine is ready */
		161	CF_NEW = 0x0004, /* has never been switched to */
		162	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
134	};	163	};
135		164
136	/* this is a structure representing a perl-level coroutine */	165	/* this is a structure representing a perl-level coroutine */
137	struct coro {	166	struct coro {
138	/* the c coroutine allocated to this perl coroutine, if any */	167	/* the c coroutine allocated to this perl coroutine, if any */
139	coro_cctx *cctx;	168	coro_cctx *cctx;
140		169
141	/* data associated with this coroutine (initial args) */	170	/* data associated with this coroutine (initial args) */
142	AV *args;	171	AV *args;
143	int refcnt;	172	int refcnt;
144	int flags;	173	int save; /* CORO_SAVE flags */
		174	int flags; /* CF_ flags */
145		175
146	/* optionally saved, might be zero */	176	/* optionally saved, might be zero */
147	AV *defav;	177	AV defav; / @_ */
148	SV *defsv;	178	SV defsv; / $_ */
149	SV *errsv;	179	SV errsv; / $@ */
		180	SV irssv; / $/ */
		181	SV irssv_sv; / real $/ cache */
150		182
151	#define VAR(name,type) type name;	183	#define VAR(name,type) type name;
152	# include "state.h"	184	# include "state.h"
153	#undef VAR	185	#undef VAR
154		186
…		…
156	int prio;	188	int prio;
157	};	189	};
158		190
159	typedef struct coro *Coro__State;	191	typedef struct coro *Coro__State;
160	typedef struct coro *Coro__State_or_hashref;	192	typedef struct coro *Coro__State_or_hashref;
		193
		194	/ Coro ******************************************************************/
		195
		196	#define PRIO_MAX 3
		197	#define PRIO_HIGH 1
		198	#define PRIO_NORMAL 0
		199	#define PRIO_LOW -1
		200	#define PRIO_IDLE -3
		201	#define PRIO_MIN -4
		202
		203	/* for Coro.pm */
		204	static SV *coro_current;
		205	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		206	static int coro_nready;
		207
		208	/ lowlevel stuff ********************************************************/
161		209
162	static AV *	210	static AV *
163	coro_clone_padlist (CV *cv)	211	coro_clone_padlist (CV *cv)
164	{	212	{
165	AV *padlist = CvPADLIST (cv);	213	AV *padlist = CvPADLIST (cv);
…		…
240		288
241	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	289	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
242	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	290	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
243	else	291	else
244	{	292	{
245	#if 0	293	#if CORO_PREFER_PERL_FUNCTIONS
246	/* this is probably cleaner, but also slower? */	294	/* this is probably cleaner, but also slower? */
247	CV *cp = Perl_cv_clone (cv);	295	CV *cp = Perl_cv_clone (cv);
248	CvPADLIST (cv) = CvPADLIST (cp);	296	CvPADLIST (cv) = CvPADLIST (cp);
249	CvPADLIST (cp) = 0;	297	CvPADLIST (cp) = 0;
250	SvREFCNT_dec (cp);	298	SvREFCNT_dec (cp);
…		…
274	av_extend (av, AvMAX (av) + 1);	322	av_extend (av, AvMAX (av) + 1);
275		323
276	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	324	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
277	}	325	}
278		326
		327	/ load & save, init *****************************************************/
		328
279	#define SB do {	329	#define SB do {
280	#define SE } while (0)	330	#define SE } while (0)
281		331
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	332	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
286		333
287	static void	334	static void
288	load_state(Coro__State c)	335	load_perl (Coro__State c)
289	{	336	{
290	#define VAR(name,type) PL_ ## name = c->name;	337	#define VAR(name,type) PL_ ## name = c->name;
291	# include "state.h"	338	# include "state.h"
292	#undef VAR	339	#undef VAR
293		340
294	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	341	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
295	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	342	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
296	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	343	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		344	if (c->irssv)
		345	{
		346	if (c->irssv == PL_rs \|\| sv_eq (PL_rs, c->irssv))
		347	SvREFCNT_dec (c->irssv);
		348	else
		349	{
		350	REPLACE_SV (PL_rs, c->irssv);
		351	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		352	sv_setsv (c->irssv_sv, PL_rs);
		353	}
		354	}
297		355
298	{	356	{
299	dSP;	357	dSP;
300	CV *cv;	358	CV *cv;
301		359
…		…
307	CvPADLIST (cv) = (AV *)POPs;	365	CvPADLIST (cv) = (AV *)POPs;
308	}	366	}
309		367
310	PUTBACK;	368	PUTBACK;
311	}	369	}
		370	assert (!PL_comppad \|\| AvARRAY (PL_comppad));//D
312	}	371	}
313		372
314	static void	373	static void
315	save_state(Coro__State c, int flags)	374	save_perl (Coro__State c)
316	{	375	{
		376	assert (!PL_comppad \|\| AvARRAY (PL_comppad));//D
317	{	377	{
318	dSP;	378	dSP;
319	I32 cxix = cxstack_ix;	379	I32 cxix = cxstack_ix;
320	PERL_CONTEXT *ccstk = cxstack;	380	PERL_CONTEXT *ccstk = cxstack;
321	PERL_SI *top_si = PL_curstackinfo;	381	PERL_SI *top_si = PL_curstackinfo;
…		…
323	/*	383	/*
324	* the worst thing you can imagine happens first - we have to save	384	* the worst thing you can imagine happens first - we have to save
325	* (and reinitialize) all cv's in the whole callchain :(	385	* (and reinitialize) all cv's in the whole callchain :(
326	*/	386	*/
327		387
		388	EXTEND (SP, 3 + 1);
328	PUSHs (Nullsv);	389	PUSHs (Nullsv);
329	/* this loop was inspired by pp_caller */	390	/* this loop was inspired by pp_caller */
330	for (;;)	391	for (;;)
331	{	392	{
332	while (cxix >= 0)	393	while (cxix >= 0)
333	{	394	{
334	PERL_CONTEXT *cx = &ccstk[cxix--];	395	PERL_CONTEXT *cx = &ccstk[cxix--];
335		396
336	if (CxTYPE(cx) == CXt_SUB)	397	if (CxTYPE (cx) == CXt_SUB)
337	{	398	{
338	CV *cv = cx->blk_sub.cv;	399	CV *cv = cx->blk_sub.cv;
339		400
340	if (CvDEPTH (cv))	401	if (CvDEPTH (cv))
341	{	402	{
342	EXTEND (SP, 3);	403	EXTEND (SP, 3);
343
344	PUSHs ((SV *)CvPADLIST(cv));	404	PUSHs ((SV *)CvPADLIST (cv));
345	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	405	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
346	PUSHs ((SV *)cv);	406	PUSHs ((SV *)cv);
347		407
348	CvDEPTH (cv) = 0;	408	CvDEPTH (cv) = 0;
349	get_padlist (cv);	409	get_padlist (cv);
350	}	410	}
351	}	411	}
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	}	412	}
361		413
362	if (top_si->si_type == PERLSI_MAIN)	414	if (top_si->si_type == PERLSI_MAIN)
363	break;	415	break;
364		416
…		…
368	}	420	}
369		421
370	PUTBACK;	422	PUTBACK;
371	}	423	}
372		424
373	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	425	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;	426	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
375	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	427	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		428	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
376		429
377	#define VAR(name,type)c->name = PL_ ## name;	430	#define VAR(name,type)c->name = PL_ ## name;
378	# include "state.h"	431	# include "state.h"
379	#undef VAR	432	#undef VAR
380	}	433	}
…		…
383	* allocate various perl stacks. This is an exact copy	436	* allocate various perl stacks. This is an exact copy
384	* of perl.c:init_stacks, except that it uses less memory	437	* of perl.c:init_stacks, except that it uses less memory
385	* on the (sometimes correct) assumption that coroutines do	438	* on the (sometimes correct) assumption that coroutines do
386	* not usually need a lot of stackspace.	439	* not usually need a lot of stackspace.
387	*/	440	*/
		441	#if CORO_PREFER_PERL_FUNCTIONS
		442	# define coro_init_stacks init_stacks
		443	#else
388	static void	444	static void
389	coro_init_stacks ()	445	coro_init_stacks ()
390	{	446	{
391	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	447	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
392	PL_curstackinfo->si_type = PERLSI_MAIN;	448	PL_curstackinfo->si_type = PERLSI_MAIN;
393	PL_curstack = PL_curstackinfo->si_stack;	449	PL_curstack = PL_curstackinfo->si_stack;
394	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	450	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
395		451
396	PL_stack_base = AvARRAY(PL_curstack);	452	PL_stack_base = AvARRAY(PL_curstack);
397	PL_stack_sp = PL_stack_base;	453	PL_stack_sp = PL_stack_base;
398	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	454	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
399		455
400	New(50,PL_tmps_stack,96,SV*);	456	New(50,PL_tmps_stack,128,SV*);
401	PL_tmps_floor = -1;	457	PL_tmps_floor = -1;
402	PL_tmps_ix = -1;	458	PL_tmps_ix = -1;
403	PL_tmps_max = 96;	459	PL_tmps_max = 128;
404		460
405	New(54,PL_markstack,16,I32);	461	New(54,PL_markstack,32,I32);
406	PL_markstack_ptr = PL_markstack;	462	PL_markstack_ptr = PL_markstack;
407	PL_markstack_max = PL_markstack + 16;	463	PL_markstack_max = PL_markstack + 32;
408		464
409	#ifdef SET_MARK_OFFSET	465	#ifdef SET_MARK_OFFSET
410	SET_MARK_OFFSET;	466	SET_MARK_OFFSET;
411	#endif	467	#endif
412		468
413	New(54,PL_scopestack,16,I32);	469	New(54,PL_scopestack,32,I32);
414	PL_scopestack_ix = 0;	470	PL_scopestack_ix = 0;
415	PL_scopestack_max = 16;	471	PL_scopestack_max = 32;
416		472
417	New(54,PL_savestack,96,ANY);	473	New(54,PL_savestack,64,ANY);
418	PL_savestack_ix = 0;	474	PL_savestack_ix = 0;
419	PL_savestack_max = 96;	475	PL_savestack_max = 64;
420		476
421	#if !PERL_VERSION_ATLEAST (5,9,0)	477	#if !PERL_VERSION_ATLEAST (5,9,0)
422	New(54,PL_retstack,8,OP*);	478	New(54,PL_retstack,16,OP*);
423	PL_retstack_ix = 0;	479	PL_retstack_ix = 0;
424	PL_retstack_max = 8;	480	PL_retstack_max = 16;
425	#endif	481	#endif
426	}	482	}
		483	#endif
427		484
428	/*	485	/*
429	* destroy the stacks, the callchain etc...	486	* destroy the stacks, the callchain etc...
430	*/	487	*/
431	static void	488	static void
432	coro_destroy_stacks ()	489	coro_destroy_stacks ()
433	{	490	{
434	if (!IN_DESTRUCT)	491	if (!IN_DESTRUCT)
435	{	492	{
436	/* is this ugly, I ask? */	493	/* restore all saved variables and stuff */
437	LEAVE_SCOPE (0);	494	LEAVE_SCOPE (0);
		495	assert (PL_tmps_floor == -1);
438		496
439	/* sure it is, but more important: is it correct?? :/ */	497	/* free all temporaries */
440	FREETMPS;	498	FREETMPS;
		499	assert (PL_tmps_ix == -1);
441		500
		501	/* unwind all extra stacks */
442	/POPSTACK_TO (PL_mainstack);//D//use/	502	POPSTACK_TO (PL_mainstack);
		503
		504	/* unwind main stack */
		505	dounwind (-1);
443	}	506	}
444		507
445	while (PL_curstackinfo->si_next)	508	while (PL_curstackinfo->si_next)
446	PL_curstackinfo = PL_curstackinfo->si_next;	509	PL_curstackinfo = PL_curstackinfo->si_next;
447		510
448	while (PL_curstackinfo)	511	while (PL_curstackinfo)
449	{	512	{
450	PERL_SI *p = PL_curstackinfo->si_prev;	513	PERL_SI *p = PL_curstackinfo->si_prev;
451		514
452	{ /D//remove/
453	dSP;
454	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
455	PUTBACK; /* possibly superfluous */
456	}
457
458	if (!IN_DESTRUCT)	515	if (!IN_DESTRUCT)
459	{
460	dounwind (-1);/D//remove/
461	SvREFCNT_dec (PL_curstackinfo->si_stack);	516	SvREFCNT_dec (PL_curstackinfo->si_stack);
462	}
463		517
464	Safefree (PL_curstackinfo->si_cxstack);	518	Safefree (PL_curstackinfo->si_cxstack);
465	Safefree (PL_curstackinfo);	519	Safefree (PL_curstackinfo);
466	PL_curstackinfo = p;	520	PL_curstackinfo = p;
467	}	521	}
…		…
473	#if !PERL_VERSION_ATLEAST (5,9,0)	527	#if !PERL_VERSION_ATLEAST (5,9,0)
474	Safefree (PL_retstack);	528	Safefree (PL_retstack);
475	#endif	529	#endif
476	}	530	}
477		531
		532	/ coroutine stack handling **********************************************/
		533
478	static void	534	static void
479	setup_coro (struct coro *coro)	535	setup_coro (struct coro *coro)
480	{	536	{
481	/*	537	/*
482	* emulate part of the perl startup here.	538	* emulate part of the perl startup here.
483	*/	539	*/
484		540
485	coro_init_stacks ();	541	coro_init_stacks ();
486		542
		543	PL_curcop = &PL_compiling;
		544	PL_in_eval = EVAL_NULL;
487	PL_curcop = 0;	545	PL_comppad = 0;
488	PL_in_eval = 0;
489	PL_curpm = 0;	546	PL_curpm = 0;
		547	PL_localizing = 0;
		548	PL_dirty = 0;
		549	PL_restartop = 0;
490		550
491	{	551	{
492	dSP;	552	dSP;
493	LOGOP myop;	553	LOGOP myop;
494		554
495	/* I have no idea why this is needed, but it is */
496	PUSHMARK (SP);
497
498	SvREFCNT_dec (GvAV (PL_defgv));	555	SvREFCNT_dec (GvAV (PL_defgv));
499	GvAV (PL_defgv) = coro->args; coro->args = 0;	556	GvAV (PL_defgv) = coro->args; coro->args = 0;
500		557
501	Zero (&myop, 1, LOGOP);	558	Zero (&myop, 1, LOGOP);
502	myop.op_next = Nullop;	559	myop.op_next = Nullop;
503	myop.op_flags = OPf_WANT_VOID;	560	myop.op_flags = OPf_WANT_VOID;
504		561
505	PL_op = (OP *)&myop;
506
507	PUSHMARK (SP);	562	PUSHMARK (SP);
508	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));	563	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
509	PUTBACK;	564	PUTBACK;
		565	PL_op = (OP *)&myop;
510	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	566	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
511	SPAGAIN;	567	SPAGAIN;
512
513	ENTER; /* necessary e.g. for dounwind */
514	}	568	}
		569
		570	ENTER; /* necessary e.g. for dounwind */
515	}	571	}
516		572
517	static void	573	static void
518	free_coro_mortal ()	574	free_coro_mortal ()
519	{	575	{
…		…
522	SvREFCNT_dec (coro_mortal);	578	SvREFCNT_dec (coro_mortal);
523	coro_mortal = 0;	579	coro_mortal = 0;
524	}	580	}
525	}	581	}
526		582
		583	/* inject a fake call to Coro::State::_cctx_init into the execution */
527	static void NOINLINE	584	static void NOINLINE
528	prepare_cctx (coro_cctx *cctx)	585	prepare_cctx (coro_cctx *cctx)
529	{	586	{
530	dSP;	587	dSP;
531	LOGOP myop;	588	LOGOP myop;
532		589
533	Zero (&myop, 1, LOGOP);	590	Zero (&myop, 1, LOGOP);
534	myop.op_next = PL_op;	591	myop.op_next = PL_op;
535	myop.op_flags = OPf_WANT_VOID;	592	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
536
537	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
538		593
539	PUSHMARK (SP);	594	PUSHMARK (SP);
		595	EXTEND (SP, 2);
		596	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
540	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	597	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
541	PUTBACK;	598	PUTBACK;
		599	PL_op = (OP *)&myop;
542	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	600	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
543	SPAGAIN;	601	SPAGAIN;
544	}	602	}
545		603
546	static void	604	static void
547	coro_run (void *arg)	605	coro_run (void *arg)
548	{	606	{
549	/* coro_run is the alternative epilogue of transfer() */	607	/* coro_run is the alternative tail of transfer(), so unlock here. */
550	UNLOCK;	608	UNLOCK;
551		609
552	/*	610	/*
553	* this is a _very_ stripped down perl interpreter ;)	611	* this is a _very_ stripped down perl interpreter ;)
554	*/	612	*/
…		…
556		614
557	/* inject call to cctx_init */	615	/* inject call to cctx_init */
558	prepare_cctx ((coro_cctx *)arg);	616	prepare_cctx ((coro_cctx *)arg);
559		617
560	/* somebody will hit me for both perl_run and PL_restartop */	618	/* somebody will hit me for both perl_run and PL_restartop */
		619	PL_restartop = PL_op;
561	perl_run (PL_curinterp);	620	perl_run (PL_curinterp);
562		621
563	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	622	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
564	abort ();	623	abort ();
565	}	624	}
…		…
569	{	628	{
570	coro_cctx *cctx;	629	coro_cctx *cctx;
571		630
572	++cctx_count;	631	++cctx_count;
573		632
574	New (0, cctx, 1, coro_cctx);	633	Newz (0, cctx, 1, coro_cctx);
575		634
576	#if HAVE_MMAP	635	#if HAVE_MMAP
577		636
578	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	637	cctx->ssize = ((CORO_STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
579	/* mmap suppsedly does allocate-on-write for us */	638	/* 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);	639	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
581		640
582	if (cctx->sptr == (void *)-1)	641	if (cctx->sptr != (void *)-1)
583	{
584	perror ("FATAL: unable to mmap stack for coroutine");
585	_exit (EXIT_FAILURE);
586	}	642	{
587
588	# if STACKGUARD	643	# if CORO_STACKGUARD
589	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	644	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
590	# endif	645	# endif
591		646	REGISTER_STACK (
592	#else	647	cctx,
593
594	cctx->ssize = STACKSIZE * (long)sizeof (long);
595	New (0, cctx->sptr, STACKSIZE, long);
596
597	if (!cctx->sptr)
598	{
599	perror ("FATAL: unable to malloc stack for coroutine");
600	_exit (EXIT_FAILURE);
601	}
602
603	#endif
604
605	#if USE_VALGRIND
606	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
607	STACKGUARD * PAGESIZE + (char *)cctx->sptr,	648	CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr,
608	cctx->ssize + (char *)cctx->sptr	649	cctx->ssize + (char *)cctx->sptr
609	);	650	);
610	#endif
611		651
612	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);	652	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		653	}
		654	else
		655	#endif
		656	{
		657	cctx->ssize = -CORO_STACKSIZE * (long)sizeof (long);
		658	New (0, cctx->sptr, CORO_STACKSIZE, long);
		659
		660	if (!cctx->sptr)
		661	{
		662	perror ("FATAL: unable to allocate stack for coroutine");
		663	_exit (EXIT_FAILURE);
		664	}
		665
		666	REGISTER_STACK (
		667	cctx,
		668	(char *)cctx->sptr,
		669	(char *)cctx->sptr - cctx->ssize
		670	);
		671
		672	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, -cctx->ssize);
		673	}
613		674
614	return cctx;	675	return cctx;
615	}	676	}
616		677
617	static void	678	static void
618	cctx_free (coro_cctx *cctx)	679	cctx_destroy (coro_cctx *cctx)
619	{	680	{
620	if (!cctx)	681	if (!cctx)
621	return;	682	return;
622		683
623	--cctx_count;	684	--cctx_count;
624		685
625	#if USE_VALGRIND	686	#if CORO_USE_VALGRIND
626	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	687	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
627	#endif	688	#endif
628		689
629	#if HAVE_MMAP	690	#if HAVE_MMAP
		691	if (cctx->ssize > 0)
630	munmap (cctx->sptr, cctx->ssize);	692	munmap (cctx->sptr, cctx->ssize);
631	#else	693	else
		694	#endif
632	Safefree (cctx->sptr);	695	Safefree (cctx->sptr);
633	#endif
634		696
635	Safefree (cctx);	697	Safefree (cctx);
636	}	698	}
637		699
638	static coro_cctx *	700	static coro_cctx *
…		…
640	{	702	{
641	coro_cctx *cctx;	703	coro_cctx *cctx;
642		704
643	if (cctx_first)	705	if (cctx_first)
644	{	706	{
645	--cctx_idle;
646	cctx = cctx_first;	707	cctx = cctx_first;
647	cctx_first = cctx->next;	708	cctx_first = cctx->next;
		709	--cctx_idle;
648	}	710	}
649	else	711	else
650	{	712	{
651	cctx = cctx_new ();	713	cctx = cctx_new ();
652	PL_op = PL_op->op_next;	714	PL_op = PL_op->op_next;
…		…
656	}	718	}
657		719
658	static void	720	static void
659	cctx_put (coro_cctx *cctx)	721	cctx_put (coro_cctx *cctx)
660	{	722	{
		723	/* free another cctx if overlimit */
		724	if (cctx_idle >= MAX_IDLE_CCTX)
		725	{
		726	coro_cctx *first = cctx_first;
		727	cctx_first = first->next;
		728	--cctx_idle;
		729
		730	assert (!first->inuse);
		731	cctx_destroy (first);
		732	}
		733
661	++cctx_idle;	734	++cctx_idle;
662	cctx->next = cctx_first;	735	cctx->next = cctx_first;
663	cctx_first = cctx;	736	cctx_first = cctx;
664	}	737	}
665		738
		739	/ coroutine switching ***************************************************/
		740
666	/* never call directly, always through the coro_state_transfer global variable */	741	/* never call directly, always through the coro_state_transfer global variable */
667	static void NOINLINE	742	static void NOINLINE
668	transfer (struct coro prev, struct coro next, int flags)	743	transfer (struct coro prev, struct coro next)
669	{	744	{
670	dSTACKLEVEL;	745	dSTACKLEVEL;
671		746
672	/* sometimes transfer is only called to set idle_sp */	747	/* sometimes transfer is only called to set idle_sp */
673	if (flags == TRANSFER_SET_STACKLEVEL)	748	if (!next)
		749	{
674	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	750	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		751	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
		752	}
675	else if (prev != next)	753	else if (prev != next)
676	{	754	{
677	coro_cctx *prev__cctx;	755	coro_cctx *prev__cctx;
678		756
679	if (!prev->cctx)	757	if (prev->flags & CF_NEW)
680	{	758	{
681	/* create a new empty context */	759	/* create a new empty context */
682	Newz (0, prev->cctx, 1, coro_cctx);	760	Newz (0, prev->cctx, 1, coro_cctx);
683	prev->cctx->inuse = 1;	761	prev->cctx->inuse = 1;
		762	prev->flags &= ~CF_NEW;
684	prev->flags \|= CF_RUNNING;	763	prev->flags \|= CF_RUNNING;
685	}	764	}
686		765
		766	/TODO: must not croak here /
687	if (!prev->flags & CF_RUNNING)	767	if (!prev->flags & CF_RUNNING)
688	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");	768	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
689		769
690	if (next->flags & CF_RUNNING)	770	if (next->flags & CF_RUNNING)
691	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");	771	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
692		772
		773	if (next->flags & CF_DESTROYED)
		774	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		775
693	prev->flags &= ~CF_RUNNING;	776	prev->flags &= ~CF_RUNNING;
694	next->flags \|= CF_RUNNING;	777	next->flags \|= CF_RUNNING;
695		778
696	LOCK;	779	LOCK;
697		780
698	if (next->mainstack)	781	if (next->flags & CF_NEW)
699	{	782	{
700	/* coroutine already started */	783	/* need to start coroutine */
701	SAVE (prev, flags);	784	next->flags &= ~CF_NEW;
702	LOAD (next);	785	/* first get rid of the old state */
		786	save_perl (prev);
		787	/* setup coroutine call */
		788	setup_coro (next);
		789	/* need a new stack */
		790	assert (!next->cctx);
703	}	791	}
704	else	792	else
705	{	793	{
706	/* need to start coroutine */	794	/* coroutine already started */
707	/* first get rid of the old state */	795	save_perl (prev);
708	SAVE (prev, -1);	796	load_perl (next);
709	/* setup coroutine call */
710	setup_coro (next);
711	/* need a new stack */
712	assert (!next->stack);
713	}	797	}
714		798
715	prev__cctx = prev->cctx;	799	prev__cctx = prev->cctx;
716		800
717	/* possibly "free" the cctx */	801	/* possibly "free" the cctx */
718	if (prev__cctx->idle_sp == STACKLEVEL)	802	if (prev__cctx->idle_sp == STACKLEVEL)
719	{	803	{
720	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	804	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
721	assert (PL_top_env == prev__cctx->top_env);	805	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		806
		807	prev->cctx = 0;
722		808
723	cctx_put (prev__cctx);	809	cctx_put (prev__cctx);
724	prev->cctx = 0;	810	prev__cctx->inuse = 0;
725	}	811	}
726		812
727	if (!next->cctx)	813	if (!next->cctx)
		814	{
728	next->cctx = cctx_get ();	815	next->cctx = cctx_get ();
		816	assert (!next->cctx->inuse);
		817	next->cctx->inuse = 1;
		818	}
729		819
730	if (prev__cctx != next->cctx)	820	if (prev__cctx != next->cctx)
731	{	821	{
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;	822	prev__cctx->top_env = PL_top_env;
739	PL_top_env = next->cctx->top_env;	823	PL_top_env = next->cctx->top_env;
740	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	824	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
741	}	825	}
742		826
743	free_coro_mortal ();	827	free_coro_mortal ();
744
745	UNLOCK;	828	UNLOCK;
746	}	829	}
747	}	830	}
748		831
749	struct transfer_args	832	struct transfer_args
750	{	833	{
751	struct coro prev, next;	834	struct coro prev, next;
752	int flags;
753	};	835	};
754		836
755	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	837	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
756		838
		839	/ high level stuff ******************************************************/
		840
757	static void	841	static int
758	coro_state_destroy (struct coro *coro)	842	coro_state_destroy (struct coro *coro)
759	{	843	{
760	if (coro->refcnt--)	844	if (coro->flags & CF_DESTROYED)
761	return;	845	return 0;
762		846
		847	coro->flags \|= CF_DESTROYED;
		848
763	if (coro->flags & CF_RUNNING)	849	if (coro->flags & CF_READY)
764	croak ("FATAL: tried to destroy currently running coroutine");	850	{
		851	/* reduce nready, as destroying a ready coro effectively unreadies it */
		852	/* alternative: look through all ready queues and remove the coro */
		853	LOCK;
		854	--coro_nready;
		855	UNLOCK;
		856	}
		857	else
		858	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
765		859
766	if (coro->mainstack && coro->mainstack != main_mainstack)	860	if (coro->mainstack && coro->mainstack != main_mainstack)
767	{	861	{
768	struct coro temp;	862	struct coro temp;
769		863
770	SAVE ((&temp), TRANSFER_SAVE_ALL);	864	assert (!(coro->flags & CF_RUNNING));
771	LOAD (coro);	865
		866	Zero (&temp, 1, struct coro);
		867	temp.save = CORO_SAVE_ALL;
		868
		869	if (coro->flags & CF_RUNNING)
		870	croak ("FATAL: tried to destroy currently running coroutine");
		871
		872	save_perl (&temp);
		873	load_perl (coro);
772		874
773	coro_destroy_stacks ();	875	coro_destroy_stacks ();
774		876
775	LOAD ((&temp)); /* this will get rid of defsv etc.. */	877	load_perl (&temp); /* this will get rid of defsv etc.. */
776		878
777	coro->mainstack = 0;	879	coro->mainstack = 0;
778	}	880	}
779		881
780	cctx_free (coro->cctx);	882	cctx_destroy (coro->cctx);
781	SvREFCNT_dec (coro->args);	883	SvREFCNT_dec (coro->args);
782	Safefree (coro);	884
		885	return 1;
783	}	886	}
784		887
785	static int	888	static int
786	coro_state_clear (pTHX_ SV sv, MAGIC mg)	889	coro_state_free (pTHX_ SV sv, MAGIC mg)
787	{	890	{
788	struct coro coro = (struct coro )mg->mg_ptr;	891	struct coro coro = (struct coro )mg->mg_ptr;
789	mg->mg_ptr = 0;	892	mg->mg_ptr = 0;
790		893
		894	if (--coro->refcnt < 0)
		895	{
791	coro_state_destroy (coro);	896	coro_state_destroy (coro);
		897	Safefree (coro);
		898	}
792		899
793	return 0;	900	return 0;
794	}	901	}
795		902
796	static int	903	static int
…		…
803	return 0;	910	return 0;
804	}	911	}
805		912
806	static MGVTBL coro_state_vtbl = {	913	static MGVTBL coro_state_vtbl = {
807	0, 0, 0, 0,	914	0, 0, 0, 0,
808	coro_state_clear,	915	coro_state_free,
809	0,	916	0,
810	#ifdef MGf_DUP	917	#ifdef MGf_DUP
811	coro_state_dup,	918	coro_state_dup,
812	#else	919	#else
813	# define MGf_DUP 0	920	# define MGf_DUP 0
…		…
835	assert (mg->mg_type == PERL_MAGIC_ext);	942	assert (mg->mg_type == PERL_MAGIC_ext);
836	return (struct coro *)mg->mg_ptr;	943	return (struct coro *)mg->mg_ptr;
837	}	944	}
838		945
839	static void	946	static void
840	prepare_transfer (struct transfer_args ta, SV prev, SV *next, int flags)	947	prepare_transfer (struct transfer_args ta, SV prev_sv, SV *next_sv)
841	{	948	{
842	ta->prev = SvSTATE (prev);	949	ta->prev = SvSTATE (prev_sv);
843	ta->next = SvSTATE (next);	950	ta->next = SvSTATE (next_sv);
844	ta->flags = flags;
845	}	951	}
846		952
847	static void	953	static void
848	api_transfer (SV prev, SV next, int flags)	954	api_transfer (SV prev_sv, SV next_sv)
849	{	955	{
850	dTHX;
851	struct transfer_args ta;	956	struct transfer_args ta;
852		957
853	prepare_transfer (&ta, prev, next, flags);	958	prepare_transfer (&ta, prev_sv, next_sv);
854	TRANSFER (ta);	959	TRANSFER (ta);
855	}	960	}
856		961
		962	static int
		963	api_save (SV *coro_sv, int new_save)
		964	{
		965	struct coro *coro = SvSTATE (coro_sv);
		966	int old_save = coro->save;
		967
		968	if (new_save >= 0)
		969	coro->save = new_save;
		970
		971	return old_save;
		972	}
		973
857	/ Coro ******************************************************************/	974	/ Coro ******************************************************************/
858		975
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	976	static void
872	coro_enq (SV *coro_sv)	977	coro_enq (SV *coro_sv)
873	{	978	{
874	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	979	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
875	coro_nready++;
876	}	980	}
877		981
878	static SV *	982	static SV *
879	coro_deq (int min_prio)	983	coro_deq (int min_prio)
880	{	984	{
…		…
884	if (min_prio < 0)	988	if (min_prio < 0)
885	min_prio = 0;	989	min_prio = 0;
886		990
887	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	991	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
888	if (AvFILLp (coro_ready [prio]) >= 0)	992	if (AvFILLp (coro_ready [prio]) >= 0)
889	{
890	coro_nready--;
891	return av_shift (coro_ready [prio]);	993	return av_shift (coro_ready [prio]);
892	}
893		994
894	return 0;	995	return 0;
895	}	996	}
896		997
897	static int	998	static int
…		…
905	coro = SvSTATE (coro_sv);	1006	coro = SvSTATE (coro_sv);
906		1007
907	if (coro->flags & CF_READY)	1008	if (coro->flags & CF_READY)
908	return 0;	1009	return 0;
909		1010
910	if (coro->flags & CF_RUNNING)
911	croak ("Coro::ready called on currently running coroutine");
912
913	coro->flags \|= CF_READY;	1011	coro->flags \|= CF_READY;
914		1012
915	LOCK;	1013	LOCK;
916	coro_enq (SvREFCNT_inc (coro_sv));	1014	coro_enq (SvREFCNT_inc (coro_sv));
		1015	++coro_nready;
917	UNLOCK;	1016	UNLOCK;
918		1017
919	return 1;	1018	return 1;
920	}	1019	}
921		1020
922	static int	1021	static int
923	api_is_ready (SV *coro_sv)	1022	api_is_ready (SV *coro_sv)
924	{	1023	{
925	return !!SvSTATE (coro_sv)->flags & CF_READY;	1024	return !!(SvSTATE (coro_sv)->flags & CF_READY);
926	}	1025	}
927		1026
928	static void	1027	static void
929	prepare_schedule (struct transfer_args *ta)	1028	prepare_schedule (struct transfer_args *ta)
930	{	1029	{
931	SV current, prev, *next;	1030	SV prev_sv, next_sv;
932
933	current = GvSV (coro_current);
934		1031
935	for (;;)	1032	for (;;)
936	{	1033	{
937	LOCK;	1034	LOCK;
938	next = coro_deq (PRIO_MIN);	1035	next_sv = coro_deq (PRIO_MIN);
		1036
		1037	/* nothing to schedule: call the idle handler */
		1038	if (!next_sv)
		1039	{
		1040	dSP;
		1041	UNLOCK;
		1042
		1043	ENTER;
		1044	SAVETMPS;
		1045
		1046	PUSHMARK (SP);
		1047	PUTBACK;
		1048	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1049
		1050	FREETMPS;
		1051	LEAVE;
		1052	continue;
		1053	}
		1054
		1055	ta->next = SvSTATE (next_sv);
		1056
		1057	/* cannot transfer to destroyed coros, skip and look for next */
		1058	if (ta->next->flags & CF_DESTROYED)
		1059	{
		1060	UNLOCK;
		1061	SvREFCNT_dec (next_sv);
		1062	/* coro_nready is already taken care of by destroy */
		1063	continue;
		1064	}
		1065
		1066	--coro_nready;
939	UNLOCK;	1067	UNLOCK;
940
941	if (next)
942	break;	1068	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	}	1069	}
957	}
958
959	prev = SvRV (current);
960	SvRV (current) = next;
961		1070
962	/* free this only after the transfer */	1071	/* free this only after the transfer */
		1072	prev_sv = SvRV (coro_current);
		1073	SvRV_set (coro_current, next_sv);
		1074	ta->prev = SvSTATE (prev_sv);
		1075
		1076	assert (ta->next->flags & CF_READY);
		1077	ta->next->flags &= ~CF_READY;
		1078
963	LOCK;	1079	LOCK;
964	free_coro_mortal ();	1080	free_coro_mortal ();
		1081	coro_mortal = prev_sv;
965	UNLOCK;	1082	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	}	1083	}
974		1084
975	static void	1085	static void
976	prepare_cede (struct transfer_args *ta)	1086	prepare_cede (struct transfer_args *ta)
977	{	1087	{
978	api_ready (GvSV (coro_current));	1088	api_ready (coro_current);
979
980	prepare_schedule (ta);	1089	prepare_schedule (ta);
981	}	1090	}
982		1091
		1092	static int
		1093	prepare_cede_notself (struct transfer_args *ta)
		1094	{
		1095	if (coro_nready)
		1096	{
		1097	SV *prev = SvRV (coro_current);
		1098	prepare_schedule (ta);
		1099	api_ready (prev);
		1100	return 1;
		1101	}
		1102	else
		1103	return 0;
		1104	}
		1105
983	static void	1106	static void
984	api_schedule (void)	1107	api_schedule (void)
985	{	1108	{
986	dTHX;
987	struct transfer_args ta;	1109	struct transfer_args ta;
988		1110
989	prepare_schedule (&ta);	1111	prepare_schedule (&ta);
990	TRANSFER (ta);	1112	TRANSFER (ta);
991	}	1113	}
992		1114
993	static void	1115	static int
994	api_cede (void)	1116	api_cede (void)
995	{	1117	{
996	dTHX;
997	struct transfer_args ta;	1118	struct transfer_args ta;
998		1119
999	prepare_cede (&ta);	1120	prepare_cede (&ta);
		1121
		1122	if (ta.prev != ta.next)
		1123	{
1000	TRANSFER (ta);	1124	TRANSFER (ta);
		1125	return 1;
		1126	}
		1127	else
		1128	return 0;
		1129	}
		1130
		1131	static int
		1132	api_cede_notself (void)
		1133	{
		1134	struct transfer_args ta;
		1135
		1136	if (prepare_cede_notself (&ta))
		1137	{
		1138	TRANSFER (ta);
		1139	return 1;
		1140	}
		1141	else
		1142	return 0;
1001	}	1143	}
1002		1144
1003	MODULE = Coro::State PACKAGE = Coro::State	1145	MODULE = Coro::State PACKAGE = Coro::State
1004		1146
1005	PROTOTYPES: DISABLE	1147	PROTOTYPES: DISABLE
…		…
1011	#endif	1153	#endif
1012	BOOT_PAGESIZE;	1154	BOOT_PAGESIZE;
1013		1155
1014	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1156	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1015		1157
1016	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1158	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1017	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1159	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1018	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1160	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1161	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1162	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1019		1163
1020	main_mainstack = PL_mainstack;	1164	main_mainstack = PL_mainstack;
1021		1165
1022	coroapi.ver = CORO_API_VERSION;	1166	coroapi.ver = CORO_API_VERSION;
1023	coroapi.transfer = api_transfer;	1167	coroapi.transfer = api_transfer;
…		…
1033	HV *hv;	1177	HV *hv;
1034	int i;	1178	int i;
1035		1179
1036	Newz (0, coro, 1, struct coro);	1180	Newz (0, coro, 1, struct coro);
1037	coro->args = newAV ();	1181	coro->args = newAV ();
		1182	coro->save = CORO_SAVE_ALL;
		1183	coro->flags = CF_NEW;
1038		1184
1039	hv = newHV ();	1185	hv = newHV ();
1040	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;	1186	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));	1187	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1042		1188
1043	for (i = 1; i < items; i++)	1189	for (i = 1; i < items; i++)
1044	av_push (coro->args, newSVsv (ST (i)));	1190	av_push (coro->args, newSVsv (ST (i)));
1045	}	1191	}
1046	OUTPUT:	1192	OUTPUT:
		1193	RETVAL
		1194
		1195	int
		1196	save (SV *coro, int new_save = -1)
		1197	CODE:
		1198	RETVAL = api_save (coro, new_save);
		1199	OUTPUT:
1047	RETVAL	1200	RETVAL
1048		1201
1049	void	1202	void
1050	_set_stacklevel (...)	1203	_set_stacklevel (...)
1051	ALIAS:	1204	ALIAS:
1052	Coro::State::transfer = 1	1205	Coro::State::transfer = 1
1053	Coro::schedule = 2	1206	Coro::schedule = 2
1054	Coro::cede = 3	1207	Coro::cede = 3
1055	Coro::Cont::yield = 4	1208	Coro::cede_notself = 4
1056	CODE:	1209	CODE:
1057	{	1210	{
1058	struct transfer_args ta;	1211	struct transfer_args ta;
1059		1212
1060	switch (ix)	1213	switch (ix)
1061	{	1214	{
1062	case 0:	1215	case 0:
1063	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));	1216	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
1064	ta.next = 0;	1217	ta.next = 0;
1065	ta.flags = TRANSFER_SET_STACKLEVEL;
1066	break;	1218	break;
1067		1219
1068	case 1:	1220	case 1:
1069	if (items != 3)	1221	if (items != 2)
1070	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1222	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1071		1223
1072	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1224	prepare_transfer (&ta, ST (0), ST (1));
1073	break;	1225	break;
1074		1226
1075	case 2:	1227	case 2:
1076	prepare_schedule (&ta);	1228	prepare_schedule (&ta);
1077	break;	1229	break;
…		…
1079	case 3:	1231	case 3:
1080	prepare_cede (&ta);	1232	prepare_cede (&ta);
1081	break;	1233	break;
1082		1234
1083	case 4:	1235	case 4:
1084	{	1236	if (!prepare_cede_notself (&ta))
1085	SV *yieldstack;	1237	XSRETURN_EMPTY;
1086	SV *sv;
1087	AV *defav = GvAV (PL_defgv);
1088		1238
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;	1239	break;
1108
1109	}	1240	}
1110		1241
		1242	BARRIER;
1111	TRANSFER (ta);	1243	TRANSFER (ta);
1112	}
1113		1244
1114	void	1245	if (GIMME_V != G_VOID && ta.next != ta.prev)
1115	_clone_state_from (SV dst, SV src)	1246	XSRETURN_YES;
		1247	}
		1248
		1249	bool
		1250	_destroy (SV *coro_sv)
1116	CODE:	1251	CODE:
1117	{	1252	RETVAL = coro_state_destroy (SvSTATE (coro_sv));
1118	struct coro *coro_src = SvSTATE (src);	1253	OUTPUT:
1119		1254	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		1255
1126	void	1256	void
1127	_exit (code)	1257	_exit (code)
1128	int code	1258	int code
1129	PROTOTYPE: $	1259	PROTOTYPE: $
…		…
1157	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1287	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1158	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1288	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1159	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1289	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1160	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1290	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1161		1291
1162	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1292	coro_current = get_sv ("Coro::current", FALSE);
1163	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1293	SvREADONLY_on (coro_current);
1164		1294
1165	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1295	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1166	coro_ready[i] = newAV ();	1296	coro_ready[i] = newAV ();
1167		1297
1168	{	1298	{
1169	SV *sv = perl_get_sv("Coro::API", 1);	1299	SV *sv = perl_get_sv("Coro::API", 1);
1170		1300
1171	coroapi.schedule = api_schedule;	1301	coroapi.schedule = api_schedule;
		1302	coroapi.save = api_save;
1172	coroapi.cede = api_cede;	1303	coroapi.cede = api_cede;
		1304	coroapi.cede_notself = api_cede_notself;
1173	coroapi.ready = api_ready;	1305	coroapi.ready = api_ready;
1174	coroapi.is_ready = api_is_ready;	1306	coroapi.is_ready = api_is_ready;
1175	coroapi.nready = &coro_nready;	1307	coroapi.nready = &coro_nready;
1176	coroapi.current = coro_current;	1308	coroapi.current = coro_current;
1177		1309
1178	GCoroAPI = &coroapi;	1310	GCoroAPI = &coroapi;
1179	sv_setiv (sv, (IV)&coroapi);	1311	sv_setiv (sv, (IV)&coroapi);
1180	SvREADONLY_on (sv);	1312	SvREADONLY_on (sv);
1181	}	1313	}
1182	}	1314	}
		1315
		1316	void
		1317	_set_current (SV *current)
		1318	PROTOTYPE: $
		1319	CODE:
		1320	SvREFCNT_dec (SvRV (coro_current));
		1321	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1183		1322
1184	int	1323	int
1185	prio (Coro::State coro, int newprio = 0)	1324	prio (Coro::State coro, int newprio = 0)
1186	ALIAS:	1325	ALIAS:
1187	nice = 1	1326	nice = 1
…		…
1190	RETVAL = coro->prio;	1329	RETVAL = coro->prio;
1191		1330
1192	if (items > 1)	1331	if (items > 1)
1193	{	1332	{
1194	if (ix)	1333	if (ix)
1195	newprio += coro->prio;	1334	newprio = coro->prio - newprio;
1196		1335
1197	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1336	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1198	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1337	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1199		1338
1200	coro->prio = newprio;	1339	coro->prio = newprio;
1201	}	1340	}
1202	}	1341	}
		1342	OUTPUT:
		1343	RETVAL
1203		1344
1204	SV *	1345	SV *
1205	ready (SV *self)	1346	ready (SV *self)
1206	PROTOTYPE: $	1347	PROTOTYPE: $
1207	CODE:	1348	CODE:
…		…
1229		1370
1230	SV *	1371	SV *
1231	_get_state ()	1372	_get_state ()
1232	CODE:	1373	CODE:
1233	{	1374	{
1234	struct {	1375	struct io_state *data;
1235	int errorno;
1236	int laststype;
1237	int laststatval;
1238	Stat_t statcache;
1239	} data;
1240		1376
		1377	RETVAL = newSV (sizeof (struct io_state));
		1378	data = (struct io_state *)SvPVX (RETVAL);
		1379	SvCUR_set (RETVAL, sizeof (struct io_state));
		1380	SvPOK_only (RETVAL);
		1381
1241	data.errorno = errno;	1382	data->errorno = errno;
1242	data.laststype = PL_laststype;	1383	data->laststype = PL_laststype;
1243	data.laststatval = PL_laststatval;	1384	data->laststatval = PL_laststatval;
1244	data.statcache = PL_statcache;	1385	data->statcache = PL_statcache;
1245
1246	RETVAL = newSVpvn ((char *)&data, sizeof data);
1247	}	1386	}
1248	OUTPUT:	1387	OUTPUT:
1249	RETVAL	1388	RETVAL
1250		1389
1251	void	1390	void
1252	_set_state (char *data_)	1391	_set_state (char *data_)
1253	PROTOTYPE: $	1392	PROTOTYPE: $
1254	CODE:	1393	CODE:
1255	{	1394	{
1256	struct {	1395	struct io_state data = (void )data_;
1257	int errorno;
1258	int laststype;
1259	int laststatval;
1260	Stat_t statcache;
1261	} data = (void )data_;
1262		1396
1263	errno = data->errorno;	1397	errno = data->errorno;
1264	PL_laststype = data->laststype;	1398	PL_laststype = data->laststype;
1265	PL_laststatval = data->laststatval;	1399	PL_laststatval = data->laststatval;
1266	PL_statcache = data->statcache;	1400	PL_statcache = data->statcache;
1267	}	1401	}
		1402

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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 1.143 by root, Wed Feb 28 11:43:03 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 1.143 by root, Wed Feb 28 11:43:03 2007 UTC