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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.1 by root, Sat Jul 14 22:14:21 2001 UTC vs.
Revision 1.94 by root, Sun Nov 26 17:14:15 2006 UTC

…		…
		1	#define PERL_NO_GET_CONTEXT
		2
		3	#include "libcoro/coro.c"
		4
1	#include "EXTERN.h"	5	#include "EXTERN.h"
2	#include "perl.h"	6	#include "perl.h"
3	#include "XSUB.h"	7	#include "XSUB.h"
4		8
		9	#include "patchlevel.h"
		10
		11	#if PERL_VERSION < 6
		12	# ifndef PL_ppaddr
		13	# define PL_ppaddr ppaddr
		14	# endif
		15	# ifndef call_sv
		16	# define call_sv perl_call_sv
		17	# endif
		18	# ifndef get_sv
		19	# define get_sv perl_get_sv
		20	# endif
		21	# ifndef get_cv
		22	# define get_cv perl_get_cv
		23	# endif
		24	# ifndef IS_PADGV
		25	# define IS_PADGV(v) 0
		26	# endif
		27	# ifndef IS_PADCONST
		28	# define IS_PADCONST(v) 0
		29	# endif
		30	#endif
		31
		32	#include <stdio.h>
		33	#include <errno.h>
		34
		35	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		36	# undef STACKGUARD
		37	#endif
		38
		39	#ifndef STACKGUARD
		40	# define STACKGUARD 0
		41	#endif
		42
		43	#ifdef HAVE_MMAP
		44	# include <unistd.h>
		45	# include <sys/mman.h>
		46	# ifndef MAP_ANONYMOUS
		47	# ifdef MAP_ANON
		48	# define MAP_ANONYMOUS MAP_ANON
		49	# else
		50	# undef HAVE_MMAP
		51	# endif
		52	# endif
		53	# include <limits.h>
		54	# ifndef PAGESIZE
		55	# define PAGESIZE pagesize
		56	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		57	static long pagesize;
		58	# else
		59	# define BOOT_PAGESIZE
		60	# endif
		61	#endif
		62
		63	/* The next macro should declare a variable stacklevel that contains and approximation
		64	* to the current C stack pointer. Its property is that it changes with each call
		65	* and should be unique. */
		66	#define dSTACKLEVEL int stacklevel
		67	#define STACKLEVEL ((void *)&stacklevel)
		68
		69	#define IN_DESTRUCT (PL_main_cv == Nullcv)
		70
		71	#include "CoroAPI.h"
		72
		73	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
		74
		75	#ifdef USE_ITHREADS
		76	static perl_mutex coro_mutex;
		77	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		78	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		79	#else
		80	# define LOCK (void)0
		81	# define UNLOCK (void)0
		82	#endif
		83
		84	static struct CoroAPI coroapi;
		85	static AV main_mainstack; / used to differentiate between $main and others */
		86	static HV coro_state_stash, coro_stash;
		87	static SV coro_mortal; / will be freed after next transfer */
		88
		89	/* this is a structure representing a c-level coroutine */
		90	typedef struct coro_stack {
		91	struct coro_stack *next;
		92
		93	/* the stack */
		94	void *sptr;
		95	long ssize; /* positive == mmap, otherwise malloc */
		96
		97	/* cpu state */
		98	void idle_sp; / original stacklevel when coroutine was created */
		99	JMPENV *top_env;
		100	coro_context cctx;
		101	} coro_stack;
		102
		103	/* the (fake) coro_stack representing the main program */
		104	static coro_stack *main_stack;
		105
		106	/* this is a structure representing a perl-level coroutine */
5	struct coro {	107	struct coro {
		108	/* the c coroutine allocated to this perl coroutine, if any */
		109	coro_stack *stack;
		110
		111	/* data associated with this coroutine (initial args) */
		112	AV *args;
		113	int refcnt;
		114
		115	/* optionally saved, might be zero */
		116	AV *defav;
		117	SV *defsv;
		118	SV *errsv;
		119
		120	/* saved global state not related to stacks */
6	U8 dowarn;	121	U8 dowarn;
7		122	I32 in_eval;
		123
		124	/* the stacks and related info (callchain etc..) */
8	PERL_SI *curstackinfo;	125	PERL_SI *curstackinfo;
9	AV *curstack;	126	AV *curstack;
10	AV *mainstack;	127	AV *mainstack;
11	SV **stack_sp;	128	SV **stack_sp;
12	OP *op;	129	OP *op;
13	SV **curpad;	130	SV **curpad;
		131	AV *comppad;
		132	CV *compcv;
14	SV **stack_base;	133	SV **stack_base;
15	SV **stack_max;	134	SV **stack_max;
16	SV **tmps_stack;	135	SV **tmps_stack;
17	I32 tmps_floor;	136	I32 tmps_floor;
18	I32 tmps_ix;	137	I32 tmps_ix;
27	I32 savestack_ix;	146	I32 savestack_ix;
28	I32 savestack_max;	147	I32 savestack_max;
29	OP **retstack;	148	OP **retstack;
30	I32 retstack_ix;	149	I32 retstack_ix;
31	I32 retstack_max;	150	I32 retstack_max;
		151	PMOP *curpm;
32	COP *curcop;	152	COP *curcop;
33		153
34	SV *proc;	154	/* coro process data */
		155	int prio;
35	};	156	};
36		157
37	typedef struct coro *Coro__State;	158	typedef struct coro *Coro__State;
38	typedef struct coro *Coro__State_or_hashref;	159	typedef struct coro *Coro__State_or_hashref;
39		160
40	#define SAVE(c) \	161	static AV *
		162	coro_clone_padlist (pTHX_ CV *cv)
		163	{
		164	AV *padlist = CvPADLIST (cv);
		165	AV newpadlist, newpad;
		166
		167	newpadlist = newAV ();
		168	AvREAL_off (newpadlist);
		169	#if PERL_VERSION < 9
		170	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		171	#else
		172	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		173	#endif
		174	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		175	--AvFILLp (padlist);
		176
		177	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
		178	av_store (newpadlist, 1, (SV *)newpad);
		179
		180	return newpadlist;
		181	}
		182
		183	static void
		184	free_padlist (pTHX_ AV *padlist)
		185	{
		186	/* may be during global destruction */
		187	if (SvREFCNT (padlist))
		188	{
		189	I32 i = AvFILLp (padlist);
		190	while (i >= 0)
		191	{
		192	SV **svp = av_fetch (padlist, i--, FALSE);
		193	if (svp)
		194	{
		195	SV *sv;
		196	while (&PL_sv_undef != (sv = av_pop ((AV )svp)))
		197	SvREFCNT_dec (sv);
		198
		199	SvREFCNT_dec (*svp);
		200	}
		201	}
		202
		203	SvREFCNT_dec ((SV*)padlist);
		204	}
		205	}
		206
		207	static int
		208	coro_cv_free (pTHX_ SV sv, MAGIC mg)
		209	{
		210	AV *padlist;
		211	AV av = (AV )mg->mg_obj;
		212
		213	/* casting is fun. */
		214	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
		215	free_padlist (aTHX_ padlist);
		216
		217	SvREFCNT_dec (av);
		218
		219	return 0;
		220	}
		221
		222	#define PERL_MAGIC_coro PERL_MAGIC_ext
		223
		224	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
		225
		226	/* the next two functions merely cache the padlists */
		227	static void
		228	get_padlist (pTHX_ CV *cv)
		229	{
		230	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);
		231
		232	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
		233	CvPADLIST (cv) = (AV )av_pop ((AV )mg->mg_obj);
		234	else
		235	{
		236	#if 0
		237	/* this should work - but it doesn't :( */
		238	CV *cp = Perl_cv_clone (aTHX_ cv);
		239	CvPADLIST (cv) = CvPADLIST (cp);
		240	CvPADLIST (cp) = 0;
		241	SvREFCNT_dec (cp);
		242	#else
		243	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		244	#endif
		245	}
		246	}
		247
		248	static void
		249	put_padlist (pTHX_ CV *cv)
		250	{
		251	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);
		252
		253	if (!mg)
		254	{
		255	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
		256	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		257	mg->mg_virtual = &vtbl_coro;
		258	mg->mg_obj = (SV *)newAV ();
		259	}
		260
		261	av_push ((AV )mg->mg_obj, (SV )CvPADLIST (cv));
		262	}
		263
		264	#define SB do {
		265	#define SE } while (0)
		266
		267	#define LOAD(state) load_state(aTHX_ (state));
		268	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
		269
		270	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
		271
		272	static void
		273	load_state(pTHX_ Coro__State c)
		274	{
		275	PL_dowarn = c->dowarn;
		276	PL_in_eval = c->in_eval;
		277
		278	PL_curstackinfo = c->curstackinfo;
		279	PL_curstack = c->curstack;
		280	PL_mainstack = c->mainstack;
		281	PL_stack_sp = c->stack_sp;
		282	PL_op = c->op;
		283	PL_curpad = c->curpad;
		284	PL_comppad = c->comppad;
		285	PL_compcv = c->compcv;
		286	PL_stack_base = c->stack_base;
		287	PL_stack_max = c->stack_max;
		288	PL_tmps_stack = c->tmps_stack;
		289	PL_tmps_floor = c->tmps_floor;
		290	PL_tmps_ix = c->tmps_ix;
		291	PL_tmps_max = c->tmps_max;
		292	PL_markstack = c->markstack;
		293	PL_markstack_ptr = c->markstack_ptr;
		294	PL_markstack_max = c->markstack_max;
		295	PL_scopestack = c->scopestack;
		296	PL_scopestack_ix = c->scopestack_ix;
		297	PL_scopestack_max = c->scopestack_max;
		298	PL_savestack = c->savestack;
		299	PL_savestack_ix = c->savestack_ix;
		300	PL_savestack_max = c->savestack_max;
		301	#if PERL_VERSION < 9
		302	PL_retstack = c->retstack;
		303	PL_retstack_ix = c->retstack_ix;
		304	PL_retstack_max = c->retstack_max;
		305	#endif
		306	PL_curpm = c->curpm;
		307	PL_curcop = c->curcop;
		308
		309	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
		310	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
		311	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		312
		313	{
		314	dSP;
		315	CV *cv;
		316
		317	/* now do the ugly restore mess */
		318	while ((cv = (CV *)POPs))
		319	{
		320	AV padlist = (AV )POPs;
		321
		322	if (padlist)
		323	{
		324	put_padlist (aTHX_ cv); /* mark this padlist as available */
		325	CvPADLIST(cv) = padlist;
		326	}
		327
		328	++CvDEPTH(cv);
		329	}
		330
		331	PUTBACK;
		332	}
		333	}
		334
		335	static void
		336	save_state(pTHX_ Coro__State c, int flags)
		337	{
		338	{
		339	dSP;
		340	I32 cxix = cxstack_ix;
		341	PERL_CONTEXT *ccstk = cxstack;
		342	PERL_SI *top_si = PL_curstackinfo;
		343
		344	/*
		345	* the worst thing you can imagine happens first - we have to save
		346	* (and reinitialize) all cv's in the whole callchain :(
		347	*/
		348
		349	PUSHs (Nullsv);
		350	/* this loop was inspired by pp_caller */
		351	for (;;)
		352	{
		353	while (cxix >= 0)
		354	{
		355	PERL_CONTEXT *cx = &ccstk[cxix--];
		356
		357	if (CxTYPE(cx) == CXt_SUB)
		358	{
		359	CV *cv = cx->blk_sub.cv;
		360	if (CvDEPTH(cv))
		361	{
		362	EXTEND (SP, CvDEPTH(cv)*2);
		363
		364	while (--CvDEPTH(cv))
		365	{
		366	/* this tells the restore code to increment CvDEPTH */
		367	PUSHs (Nullsv);
		368	PUSHs ((SV *)cv);
		369	}
		370
		371	PUSHs ((SV *)CvPADLIST(cv));
		372	PUSHs ((SV *)cv);
		373
		374	get_padlist (aTHX_ cv);
		375	}
		376	}
		377	#ifdef CXt_FORMAT
		378	else if (CxTYPE(cx) == CXt_FORMAT)
		379	{
		380	/* I never used formats, so how should I know how these are implemented? */
		381	/* my bold guess is as a simple, plain sub... */
		382	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
		383	}
		384	#endif
		385	}
		386
		387	if (top_si->si_type == PERLSI_MAIN)
		388	break;
		389
		390	top_si = top_si->si_prev;
		391	ccstk = top_si->si_cxstack;
		392	cxix = top_si->si_cxix;
		393	}
		394
		395	PUTBACK;
		396	}
		397
		398	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
		399	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
		400	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		401
41	c->dowarn = PL_dowarn; \	402	c->dowarn = PL_dowarn;
		403	c->in_eval = PL_in_eval;
		404
42	c->curstackinfo = PL_curstackinfo; \	405	c->curstackinfo = PL_curstackinfo;
43	c->curstack = PL_curstack; \	406	c->curstack = PL_curstack;
44	c->mainstack = PL_mainstack; \	407	c->mainstack = PL_mainstack;
45	c->stack_sp = PL_stack_sp; \	408	c->stack_sp = PL_stack_sp;
46	c->op = PL_op; \	409	c->op = PL_op;
47	c->curpad = PL_curpad; \	410	c->curpad = PL_curpad;
		411	c->comppad = PL_comppad;
		412	c->compcv = PL_compcv;
48	c->stack_base = PL_stack_base; \	413	c->stack_base = PL_stack_base;
49	c->stack_max = PL_stack_max; \	414	c->stack_max = PL_stack_max;
50	c->tmps_stack = PL_tmps_stack; \	415	c->tmps_stack = PL_tmps_stack;
51	c->tmps_floor = PL_tmps_floor; \	416	c->tmps_floor = PL_tmps_floor;
52	c->tmps_ix = PL_tmps_ix; \	417	c->tmps_ix = PL_tmps_ix;
53	c->tmps_max = PL_tmps_max; \	418	c->tmps_max = PL_tmps_max;
54	c->markstack = PL_markstack; \	419	c->markstack = PL_markstack;
55	c->markstack_ptr = PL_markstack_ptr; \	420	c->markstack_ptr = PL_markstack_ptr;
56	c->markstack_max = PL_markstack_max; \	421	c->markstack_max = PL_markstack_max;
57	c->scopestack = PL_scopestack; \	422	c->scopestack = PL_scopestack;
58	c->scopestack_ix = PL_scopestack_ix; \	423	c->scopestack_ix = PL_scopestack_ix;
59	c->scopestack_max = PL_scopestack_max;\	424	c->scopestack_max = PL_scopestack_max;
60	c->savestack = PL_savestack; \	425	c->savestack = PL_savestack;
61	c->savestack_ix = PL_savestack_ix; \	426	c->savestack_ix = PL_savestack_ix;
62	c->savestack_max = PL_savestack_max; \	427	c->savestack_max = PL_savestack_max;
		428	#if PERL_VERSION < 9
63	c->retstack = PL_retstack; \	429	c->retstack = PL_retstack;
64	c->retstack_ix = PL_retstack_ix; \	430	c->retstack_ix = PL_retstack_ix;
65	c->retstack_max = PL_retstack_max; \	431	c->retstack_max = PL_retstack_max;
		432	#endif
		433	c->curpm = PL_curpm;
66	c->curcop = PL_curcop;	434	c->curcop = PL_curcop;
		435	}
67		436
68	#define LOAD(c) \	437	/*
69	PL_dowarn = c->dowarn; \	438	* allocate various perl stacks. This is an exact copy
70	PL_curstackinfo = c->curstackinfo; \	439	* of perl.c:init_stacks, except that it uses less memory
71	PL_curstack = c->curstack; \	440	* on the (sometimes correct) assumption that coroutines do
72	PL_mainstack = c->mainstack; \	441	* not usually need a lot of stackspace.
73	PL_stack_sp = c->stack_sp; \	442	*/
74	PL_op = c->op; \	443	static void
75	PL_curpad = c->curpad; \	444	coro_init_stacks (pTHX)
76	PL_stack_base = c->stack_base; \
77	PL_stack_max = c->stack_max; \
78	PL_tmps_stack = c->tmps_stack; \
79	PL_tmps_floor = c->tmps_floor; \
80	PL_tmps_ix = c->tmps_ix; \
81	PL_tmps_max = c->tmps_max; \
82	PL_markstack = c->markstack; \
83	PL_markstack_ptr = c->markstack_ptr; \
84	PL_markstack_max = c->markstack_max; \
85	PL_scopestack = c->scopestack; \
86	PL_scopestack_ix = c->scopestack_ix; \
87	PL_scopestack_max = c->scopestack_max;\
88	PL_savestack = c->savestack; \
89	PL_savestack_ix = c->savestack_ix; \
90	PL_savestack_max = c->savestack_max; \
91	PL_retstack = c->retstack; \
92	PL_retstack_ix = c->retstack_ix; \
93	PL_retstack_max = c->retstack_max; \
94	PL_curcop = c->curcop;
95
96	/* this is an EXACT copy of S_nuke_stacks in perl.c, which is unfortunately static */
97	STATIC void
98	S_nuke_stacks(pTHX)
99	{	445	{
100	while (PL_curstackinfo->si_next)	446	LOCK;
		447
		448	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
		449	PL_curstackinfo->si_type = PERLSI_MAIN;
101	PL_curstackinfo = PL_curstackinfo->si_next;	450	PL_curstack = PL_curstackinfo->si_stack;
102	while (PL_curstackinfo) {	451	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
103	PERL_SI *p = PL_curstackinfo->si_prev;	452
104	/* curstackinfo->si_stack got nuked by sv_free_arenas() */	453	PL_stack_base = AvARRAY(PL_curstack);
105	Safefree(PL_curstackinfo->si_cxstack);	454	PL_stack_sp = PL_stack_base;
106	Safefree(PL_curstackinfo);	455	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
107	PL_curstackinfo = p;	456
		457	New(50,PL_tmps_stack,96,SV*);
		458	PL_tmps_floor = -1;
		459	PL_tmps_ix = -1;
		460	PL_tmps_max = 96;
		461
		462	New(54,PL_markstack,16,I32);
		463	PL_markstack_ptr = PL_markstack;
		464	PL_markstack_max = PL_markstack + 16;
		465
		466	#ifdef SET_MARK_OFFSET
		467	SET_MARK_OFFSET;
		468	#endif
		469
		470	New(54,PL_scopestack,16,I32);
		471	PL_scopestack_ix = 0;
		472	PL_scopestack_max = 16;
		473
		474	New(54,PL_savestack,96,ANY);
		475	PL_savestack_ix = 0;
		476	PL_savestack_max = 96;
		477
		478	#if PERL_VERSION < 9
		479	New(54,PL_retstack,8,OP*);
		480	PL_retstack_ix = 0;
		481	PL_retstack_max = 8;
		482	#endif
		483
		484	UNLOCK;
		485	}
		486
		487	/*
		488	* destroy the stacks, the callchain etc...
		489	*/
		490	static void
		491	destroy_stacks(pTHX)
		492	{
		493	if (!IN_DESTRUCT)
		494	{
		495	/* is this ugly, I ask? */
		496	LEAVE_SCOPE (0);
		497
		498	/* sure it is, but more important: is it correct?? :/ */
		499	FREETMPS;
		500
		501	/POPSTACK_TO (PL_mainstack);//D//use/
108	}	502	}
		503
		504	while (PL_curstackinfo->si_next)
		505	PL_curstackinfo = PL_curstackinfo->si_next;
		506
		507	while (PL_curstackinfo)
		508	{
		509	PERL_SI *p = PL_curstackinfo->si_prev;
		510
		511	{ /D//remove/
		512	dSP;
		513	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
		514	PUTBACK; /* possibly superfluous */
		515	}
		516
		517	if (!IN_DESTRUCT)
		518	{
		519	dounwind (-1);/D//remove/
		520	SvREFCNT_dec (PL_curstackinfo->si_stack);
		521	}
		522
		523	Safefree (PL_curstackinfo->si_cxstack);
		524	Safefree (PL_curstackinfo);
		525	PL_curstackinfo = p;
		526	}
		527
109	Safefree(PL_tmps_stack);	528	Safefree (PL_tmps_stack);
110	Safefree(PL_markstack);	529	Safefree (PL_markstack);
111	Safefree(PL_scopestack);	530	Safefree (PL_scopestack);
112	Safefree(PL_savestack);	531	Safefree (PL_savestack);
		532	#if PERL_VERSION < 9
113	Safefree(PL_retstack);	533	Safefree (PL_retstack);
		534	#endif
114	}	535	}
115		536
		537	static void
		538	setup_coro (struct coro *coro)
		539	{
		540	/*
		541	* emulate part of the perl startup here.
		542	*/
		543	dTHX;
		544	dSP;
		545	UNOP myop;
		546	SV sub_init = (SV )get_cv ("Coro::State::coro_init", FALSE);
		547
		548	coro_init_stacks (aTHX);
		549	/PL_curcop = 0;/
		550	/PL_in_eval = PL_in_eval;/ /* inherit */
		551	SvREFCNT_dec (GvAV (PL_defgv));
		552	GvAV (PL_defgv) = coro->args; coro->args = 0;
		553
		554	SPAGAIN;
		555
		556	Zero (&myop, 1, UNOP);
		557	myop.op_next = Nullop;
		558	myop.op_flags = OPf_WANT_VOID;
		559
		560	PL_op = (OP *)&myop;
		561
		562	PUSHMARK(SP);
		563	XPUSHs (sub_init);
		564	PUTBACK;
		565	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		566	SPAGAIN;
		567
		568	ENTER; /* necessary e.g. for dounwind */
		569	}
		570
		571	static void
		572	free_coro_mortal ()
		573	{
		574	if (coro_mortal)
		575	{
		576	SvREFCNT_dec (coro_mortal);
		577	coro_mortal = 0;
		578	}
		579	}
		580
		581	static void
		582	coro_run (void *arg)
		583	{
		584	/*
		585	* this is a _very_ stripped down perl interpreter ;)
		586	*/
		587	dTHX;
		588	int ret;
		589
		590	UNLOCK;
		591
		592	PL_top_env = &PL_start_env;
		593
		594	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));
		595	sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
		596
		597	/* continue at cctx_init, without entersub */
		598	PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
		599
		600	/* somebody will hit me for both perl_run and PL_restartop */
		601	ret = perl_run (aTHX_ PERL_GET_CONTEXT);
		602	printf ("ret %d\n", ret);//D
		603
		604	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
		605	abort ();
		606	}
		607
		608	static coro_stack *
		609	stack_new ()
		610	{
		611	coro_stack *stack;
		612
		613	New (0, stack, 1, coro_stack);
		614
		615	#if HAVE_MMAP
		616
		617	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		618	/* mmap suppsedly does allocate-on-write for us */
		619	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		620
		621	if (stack->sptr == (void *)-1)
		622	{
		623	perror ("FATAL: unable to mmap stack for coroutine");
		624	_exit (EXIT_FAILURE);
		625	}
		626
		627	# if STACKGUARD
		628	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		629	# endif
		630
		631	#else
		632
		633	stack->ssize = STACKSIZE * (long)sizeof (long);
		634	New (0, stack->sptr, STACKSIZE, long);
		635
		636	if (!stack->sptr)
		637	{
		638	perror (stderr, "FATAL: unable to malloc stack for coroutine");
		639	_exit (EXIT_FAILURE);
		640	}
		641
		642	#endif
		643
		644	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
		645
		646	return stack;
		647	}
		648
		649	static void
		650	stack_free (coro_stack *stack)
		651	{
		652	if (!stack \|\| stack == main_stack)
		653	return;
		654
		655	#if HAVE_MMAP
		656	munmap (stack->sptr, stack->ssize);
		657	#else
		658	Safefree (stack->sptr);
		659	#endif
		660
		661	Safefree (stack);
		662	}
		663
		664	static coro_stack *stack_first;
		665
		666	static coro_stack *
		667	stack_get ()
		668	{
		669	coro_stack *stack;
		670
		671	if (stack_first)
		672	{
		673	stack = stack_first;
		674	stack_first = stack->next;
		675	}
		676	else
		677	{
		678	stack = stack_new ();
		679	PL_op = PL_op->op_next;
		680	}
		681
		682	return stack;
		683	}
		684
		685	static void
		686	stack_put (coro_stack *stack)
		687	{
		688	stack->next = stack_first;
		689	stack_first = stack;
		690	}
		691
		692	/* never call directly, always through the coro_state_transfer global variable */
		693	static void
		694	transfer_impl (pTHX_ struct coro prev, struct coro next, int flags)
		695	{
		696	dSTACKLEVEL;
		697
		698	/* sometimes transfer is only called to set idle_sp */
		699	if (flags == TRANSFER_SET_STACKLEVEL)
		700	((coro_stack *)prev)->idle_sp = STACKLEVEL;
		701	else if (prev != next)
		702	{
		703	coro_stack *prev__stack;
		704
		705	LOCK;
		706
		707	if (next->mainstack)
		708	{
		709	/* coroutine already started */
		710	SAVE (prev, flags);
		711	LOAD (next);
		712	}
		713	else
		714	{
		715	/* need to start coroutine */
		716	/* first get rid of the old state */
		717	SAVE (prev, -1);
		718	/* setup coroutine call */
		719	setup_coro (next);
		720	/* need a stack */
		721	next->stack = 0;
		722	}
		723
		724	prev__stack = prev->stack;
		725
		726	/* possibly "free" the stack */
		727	if (prev__stack->idle_sp == STACKLEVEL)
		728	{
		729	stack_put (prev__stack);
		730	prev->stack = 0;
		731	}
		732
		733	if (!next->stack)
		734	next->stack = stack_get ();
		735
		736	if (prev__stack != next->stack)
		737	{
		738	prev__stack->top_env = PL_top_env;
		739	PL_top_env = next->stack->top_env;
		740	printf ("stacksw %p %p\n", prev__stack->idle_sp, next->stack->idle_sp);//D
		741	coro_transfer (&prev__stack->cctx, &next->stack->cctx);
		742	}
		743
		744	free_coro_mortal ();
		745
		746	UNLOCK;
		747	}
		748	}
		749
		750	/* use this function pointer to call the above function */
		751	/* this is done to increase chances of the compiler not inlining the call */
		752	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
		753	void (coro_state_transfer)(pTHX_ struct coro prev, struct coro *next, int flags) = transfer_impl;
		754
		755	struct transfer_args
		756	{
		757	struct coro prev, next;
		758	int flags;
		759	};
		760
		761	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)
		762
		763	static void
		764	coro_state_destroy (struct coro *coro)
		765	{
		766	if (coro->refcnt--)
		767	return;
		768
		769	if (coro->mainstack && coro->mainstack != main_mainstack)
		770	{
		771	struct coro temp;
		772
		773	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
		774	LOAD (aTHX_ coro);
		775
		776	destroy_stacks (aTHX);
		777
		778	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		779
		780	coro->mainstack = 0;
		781	}
		782
		783	stack_free (coro->stack);
		784	SvREFCNT_dec (coro->args);
		785	Safefree (coro);
		786	}
		787
		788	static int
		789	coro_state_clear (SV sv, MAGIC mg)
		790	{
		791	struct coro coro = (struct coro )mg->mg_ptr;
		792	mg->mg_ptr = 0;
		793
		794	coro_state_destroy (coro);
		795
		796	return 0;
		797	}
		798
		799	static int
		800	coro_state_dup (MAGIC mg, CLONE_PARAMS params)
		801	{
		802	struct coro coro = (struct coro )mg->mg_ptr;
		803
		804	++coro->refcnt;
		805
		806	return 0;
		807	}
		808
		809	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };
		810
		811	static struct coro *
		812	SvSTATE (SV *coro)
		813	{
		814	HV *stash;
		815	MAGIC *mg;
		816
		817	if (SvROK (coro))
		818	coro = SvRV (coro);
		819
		820	stash = SvSTASH (coro);
		821	if (stash != coro_stash && stash != coro_state_stash)
		822	{
		823	/* very slow, but rare, check */
		824	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		825	croak ("Coro::State object required");
		826	}
		827
		828	mg = SvMAGIC (coro);
		829	assert (mg->mg_type == PERL_MAGIC_ext);
		830	return (struct coro *)mg->mg_ptr;
		831	}
		832
		833	static void
		834	prepare_transfer (pTHX_ struct transfer_args ta, SV prev, SV *next, int flags)
		835	{
		836	ta->prev = SvSTATE (prev);
		837	ta->next = SvSTATE (next);
		838	ta->flags = flags;
		839	}
		840
		841	static void
		842	api_transfer (SV prev, SV next, int flags)
		843	{
		844	dTHX;
		845	struct transfer_args ta;
		846
		847	prepare_transfer (aTHX_ &ta, prev, next, flags);
		848	TRANSFER (ta);
		849	}
		850
		851	/ Coro ******************************************************************/
		852
		853	#define PRIO_MAX 3
		854	#define PRIO_HIGH 1
		855	#define PRIO_NORMAL 0
		856	#define PRIO_LOW -1
		857	#define PRIO_IDLE -3
		858	#define PRIO_MIN -4
		859
		860	/* for Coro.pm */
		861	static GV coro_current, coro_idle;
		862	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		863	static int coro_nready;
		864
		865	static void
		866	coro_enq (pTHX_ SV *sv)
		867	{
		868	int prio;
		869
		870	if (SvTYPE (sv) != SVt_PVHV)
		871	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		872
		873	prio = SvSTATE (sv)->prio;
		874
		875	av_push (coro_ready [prio - PRIO_MIN], sv);
		876	coro_nready++;
		877	}
		878
		879	static SV *
		880	coro_deq (pTHX_ int min_prio)
		881	{
		882	int prio = PRIO_MAX - PRIO_MIN;
		883
		884	min_prio -= PRIO_MIN;
		885	if (min_prio < 0)
		886	min_prio = 0;
		887
		888	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
		889	if (AvFILLp (coro_ready [prio]) >= 0)
		890	{
		891	coro_nready--;
		892	return av_shift (coro_ready [prio]);
		893	}
		894
		895	return 0;
		896	}
		897
		898	static void
		899	api_ready (SV *coro)
		900	{
		901	dTHX;
		902
		903	if (SvROK (coro))
		904	coro = SvRV (coro);
		905
		906	LOCK;
		907	coro_enq (aTHX_ SvREFCNT_inc (coro));
		908	UNLOCK;
		909	}
		910
		911	static void
		912	prepare_schedule (aTHX_ struct transfer_args *ta)
		913	{
		914	SV current, prev, *next;
		915
		916	LOCK;
		917
		918	current = GvSV (coro_current);
		919
		920	for (;;)
		921	{
		922	LOCK;
		923
		924	next = coro_deq (aTHX_ PRIO_MIN);
		925
		926	if (next)
		927	break;
		928
		929	UNLOCK;
		930
		931	{
		932	dSP;
		933
		934	ENTER;
		935	SAVETMPS;
		936
		937	PUSHMARK (SP);
		938	PUTBACK;
		939	call_sv (GvSV (coro_idle), G_DISCARD);
		940
		941	FREETMPS;
		942	LEAVE;
		943	}
		944	}
		945
		946	prev = SvRV (current);
		947	SvRV (current) = next;
		948
		949	/* free this only after the transfer */
		950	free_coro_mortal ();
		951	coro_mortal = prev;
		952
		953	ta->prev = SvSTATE (prev);
		954	ta->next = SvSTATE (next);
		955	ta->flags = TRANSFER_SAVE_ALL;
		956
		957	UNLOCK;
		958	}
		959
		960	static void
		961	prepare_cede (aTHX_ struct transfer_args *ta)
		962	{
		963	LOCK;
		964	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
		965	UNLOCK;
		966
		967	prepare_schedule (ta);
		968	}
		969
		970	static void
		971	api_schedule (void)
		972	{
		973	dTHX;
		974	struct transfer_args ta;
		975
		976	prepare_schedule (&ta);
		977	TRANSFER (ta);
		978	}
		979
		980	static void
		981	api_cede (void)
		982	{
		983	dTHX;
		984	struct transfer_args ta;
		985
		986	prepare_cede (&ta);
		987	TRANSFER (ta);
		988	}
		989
116	MODULE = Coro::State PACKAGE = Coro::State	990	MODULE = Coro::State PACKAGE = Coro::State
117		991
118	PROTOTYPES: ENABLE	992	PROTOTYPES: DISABLE
119		993
120	Coro::State	994	BOOT:
121	newprocess(proc)	995	{
122	SV * proc	996	#ifdef USE_ITHREADS
123	PROTOTYPE: &	997	MUTEX_INIT (&coro_mutex);
		998	#endif
		999	BOOT_PAGESIZE;
		1000
		1001	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
		1002
		1003	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
		1004	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
		1005	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
		1006
		1007	main_mainstack = PL_mainstack;
		1008
		1009	coroapi.ver = CORO_API_VERSION;
		1010	coroapi.transfer = api_transfer;
		1011
		1012	Newz (0, main_stack, 1, coro_stack);
		1013	main_stack->idle_sp = (void *)-1;
		1014
		1015	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
		1016	}
		1017
		1018	SV *
		1019	new (char *klass, ...)
124	CODE:	1020	CODE:
125	Coro__State coro;	1021	{
126		1022	struct coro *coro;
		1023	HV *hv;
		1024	int i;
		1025
127	New (0, coro, 1, struct coro);	1026	Newz (0, coro, 1, struct coro);
		1027	coro->args = newAV ();
128		1028
		1029	hv = newHV ();
		1030	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
		1031	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1032
		1033	for (i = 1; i < items; i++)
		1034	av_push (coro->args, newSVsv (ST (i)));
		1035
		1036	coro->stack = main_stack;
129	coro->mainstack = 0; /* actual work is done inside transfer */	1037	/coro->mainstack = 0; //actual work is done inside transfer /
130	coro->proc = SvREFCNT_inc (proc);	1038	/coro->stack = 0;/
131		1039	}
132	RETVAL = coro;
133	OUTPUT:	1040	OUTPUT:
134	RETVAL	1041	RETVAL
135		1042
136	void	1043	void
137	transfer(prev,next)	1044	_set_stacklevel (...)
138	Coro::State_or_hashref prev	1045	ALIAS:
139	Coro::State_or_hashref next	1046	Coro::State::transfer = 1
		1047	Coro::schedule = 2
		1048	Coro::cede = 3
		1049	Coro::Cont::yield = 4
140	CODE:	1050	CODE:
		1051	{
		1052	struct transfer_args ta;
141		1053
142	PUTBACK;	1054	switch (ix)
143	SAVE (prev);
144
145	/*
146	* this could be done in newprocess which would to
147	* extremely elegant and fast (just PUTBACK/SAVE/LOAD/SPAGAIN)
148	* code here, but lazy allocation of stacks has also
149	* some virtues and the overhead of the if() is nil.
150	*/
151	if (next->mainstack)
152	{	1055	{
153	LOAD (next);	1056	case 0:
154	next->mainstack = 0; /* unnecessary but much cleaner */	1057	ta.prev = (struct coro )INT2PTR (coro_stack , SvIV (ST (0)));
155	SPAGAIN;	1058	ta.next = 0;
		1059	ta.flags = TRANSFER_SET_STACKLEVEL;
		1060	break;
		1061
		1062	case 1:
		1063	if (items != 3)
		1064	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1065
		1066	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1067	break;
		1068
		1069	case 2:
		1070	prepare_schedule (&ta);
		1071	break;
		1072
		1073	case 3:
		1074	prepare_cede (&ta);
		1075	break;
		1076
		1077	case 4:
		1078	{
		1079	SV *yieldstack;
		1080	SV *sv;
		1081	AV *defav = GvAV (PL_defgv);
		1082
		1083	yieldstack = *hv_fetch (
		1084	(HV *)SvRV (GvSV (coro_current)),
		1085	"yieldstack", sizeof ("yieldstack") - 1,
		1086	0
		1087	);
		1088
		1089	/* set up @_ -- ugly */
		1090	av_clear (defav);
		1091	av_fill (defav, items - 1);
		1092	while (items--)
		1093	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1094
		1095	sv = av_pop ((AV *)SvRV (yieldstack));
		1096	ta.prev = SvSTATE (av_fetch ((AV )SvRV (sv), 0, 0));
		1097	ta.next = SvSTATE (av_fetch ((AV )SvRV (sv), 1, 0));
		1098	ta.flags = 0;
		1099	SvREFCNT_dec (sv);
		1100	}
		1101	break;
		1102
156	}	1103	}
		1104
		1105	TRANSFER (ta);
		1106	}
		1107
		1108	void
		1109	_clone_state_from (SV dst, SV src)
		1110	CODE:
		1111	{
		1112	struct coro *coro_src = SvSTATE (src);
		1113
		1114	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
		1115
		1116	++coro_src->refcnt;
		1117	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags \|= MGf_DUP;
		1118	}
		1119
		1120	void
		1121	_nonlocal_goto (IV nextop)
		1122	CODE:
		1123	/* uuh, somebody will kill me again for this */
		1124	PL_op->op_next = INT2PTR (OP *, nextop);
		1125
		1126	void
		1127	_exit (code)
		1128	int code
		1129	PROTOTYPE: $
		1130	CODE:
		1131	_exit (code);
		1132
		1133	MODULE = Coro::State PACKAGE = Coro
		1134
		1135	BOOT:
		1136	{
		1137	int i;
		1138
		1139	coro_stash = gv_stashpv ("Coro", TRUE);
		1140
		1141	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
		1142	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
		1143	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
		1144	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
		1145	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
		1146	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
		1147
		1148	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
		1149	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
		1150
		1151	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
		1152	coro_ready[i] = newAV ();
		1153
157	else	1154	{
		1155	SV *sv = perl_get_sv("Coro::API", 1);
		1156
		1157	coroapi.schedule = api_schedule;
		1158	coroapi.cede = api_cede;
		1159	coroapi.ready = api_ready;
		1160	coroapi.nready = &coro_nready;
		1161	coroapi.current = coro_current;
		1162
		1163	GCoroAPI = &coroapi;
		1164	sv_setiv (sv, (IV)&coroapi);
		1165	SvREADONLY_on (sv);
		1166	}
		1167	}
		1168
		1169	int
		1170	prio (Coro::State coro, int newprio = 0)
		1171	ALIAS:
		1172	nice = 1
		1173	CODE:
		1174	{
		1175	RETVAL = coro->prio;
		1176
		1177	if (items > 1)
158	{	1178	{
159	/*
160	* emulate part of the perl startup here.
161	*/
162	UNOP myop;
163
164	init_stacks ();
165	PL_op = (OP *)&myop;
166	/PL_curcop = 0;/
167
168	SPAGAIN;
169	Zero(&myop, 1, UNOP);
170	myop.op_next = Nullop;
171	myop.op_flags = OPf_WANT_VOID;
172
173	EXTEND (SP,1);
174	PUSHs (next->proc);
175		1179	if (ix)
176	PUTBACK;	1180	newprio += coro->prio;
177	/*
178	* the next line is slightly wrong, as PL_op->op_next
179	* is actually being executed so we skip the first op
180	* that doens't matter, though, since it is only
181	* pp_nextstate and we never return...
182	*/
183	PL_op = Perl_pp_entersub(aTHX);
184	SPAGAIN;
185		1181
186	ENTER;	1182	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1183	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1184
		1185	coro->prio = newprio;
187	}	1186	}
		1187	}
188		1188
189	void	1189	void
190	DESTROY(coro)	1190	ready (SV *self)
191	Coro::State coro	1191	PROTOTYPE: $
		1192	CODE:
		1193	api_ready (self);
		1194
		1195	int
		1196	nready (...)
		1197	PROTOTYPE:
192	CODE:	1198	CODE:
		1199	RETVAL = coro_nready;
		1200	OUTPUT:
		1201	RETVAL
193		1202
194	if (coro->mainstack)	1203	MODULE = Coro::State PACKAGE = Coro::AIO
195	{
196	struct coro temp;
197		1204
198	PUTBACK;	1205	SV *
199	SAVE((&temp));	1206	_get_state ()
200	LOAD(coro);	1207	CODE:
		1208	{
		1209	struct {
		1210	int errorno;
		1211	int laststype;
		1212	int laststatval;
		1213	Stat_t statcache;
		1214	} data;
201		1215
202	S_nuke_stacks ();	1216	data.errorno = errno;
		1217	data.laststype = PL_laststype;
		1218	data.laststatval = PL_laststatval;
		1219	data.statcache = PL_statcache;
203		1220
204	LOAD((&temp));	1221	RETVAL = newSVpvn ((char *)&data, sizeof data);
205	SPAGAIN;	1222	}
206	}	1223	OUTPUT:
		1224	RETVAL
207		1225
208	SvREFCNT_dec (coro->proc);	1226	void
209	Safefree (coro);	1227	_set_state (char *data_)
		1228	PROTOTYPE: $
		1229	CODE:
		1230	{
		1231	struct {
		1232	int errorno;
		1233	int laststype;
		1234	int laststatval;
		1235	Stat_t statcache;
		1236	} data = (void )data_;
210		1237
211		1238	errno = data->errorno;
		1239	PL_laststype = data->laststype;
		1240	PL_laststatval = data->laststatval;
		1241	PL_statcache = data->statcache;
		1242	}

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Comparing Coro/Coro/State.xs (file contents): Revision 1.1 by root, Sat Jul 14 22:14:21 2001 UTC vs. Revision 1.94 by root, Sun Nov 26 17:14:15 2006 UTC

Diff Legend

Comparing Coro/Coro/State.xs (file contents):
Revision 1.1 by root, Sat Jul 14 22:14:21 2001 UTC vs.
Revision 1.94 by root, Sun Nov 26 17:14:15 2006 UTC