[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 1.93 by root, Sun Nov 26 03:22:50 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	#define labs(l) ((l) >= 0 ? (l) : -(l))
		72
		73	#include "CoroAPI.h"
		74
		75	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
		76
		77	#ifdef USE_ITHREADS
		78	static perl_mutex coro_mutex;
		79	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		80	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		81	#else
		82	# define LOCK (void)0
		83	# define UNLOCK (void)0
		84	#endif
		85
		86	static struct CoroAPI coroapi;
		87	static AV main_mainstack; / used to differentiate between $main and others */
		88	static HV coro_state_stash, coro_stash;
		89	static SV coro_mortal; / will be freed after next transfer */
		90
		91	/* this is a structure representing a c-level coroutine */
		92	typedef struct coro_stack {
		93	struct coro_stack *next;
		94
		95	/* the stack */
		96	void *sptr;
		97	long ssize; /* positive == mmap, otherwise malloc */
		98
		99	/* cpu state */
		100	void idle_sp; / original stacklevel when coroutine was created */
		101	JMPENV *top_env;
		102	coro_context cctx;
		103	} coro_stack;
		104
		105	/* the (fake) coro_stack representing the main program */
		106	static coro_stack *main_stack;
		107
		108	/* this is a structure representing a perl-level coroutine */
5	struct coro {	109	struct coro {
		110	/* the c coroutine allocated to this perl coroutine, if any */
		111	coro_stack *stack;
		112
		113	/* data associated with this coroutine (initial args) */
		114	AV *args;
		115	int refcnt;
		116
		117	/* optionally saved, might be zero */
		118	AV *defav;
		119	SV *defsv;
		120	SV *errsv;
		121
		122	/* saved global state not related to stacks */
6	U8 dowarn;	123	U8 dowarn;
7		124	I32 in_eval;
		125
		126	/* the stacks and related info (callchain etc..) */
8	PERL_SI *curstackinfo;	127	PERL_SI *curstackinfo;
9	AV *curstack;	128	AV *curstack;
10	AV *mainstack;	129	AV *mainstack;
11	SV **stack_sp;	130	SV **stack_sp;
12	OP *op;	131	OP *op;
13	SV **curpad;	132	SV **curpad;
		133	AV *comppad;
		134	CV *compcv;
14	SV **stack_base;	135	SV **stack_base;
15	SV **stack_max;	136	SV **stack_max;
16	SV **tmps_stack;	137	SV **tmps_stack;
17	I32 tmps_floor;	138	I32 tmps_floor;
18	I32 tmps_ix;	139	I32 tmps_ix;
27	I32 savestack_ix;	148	I32 savestack_ix;
28	I32 savestack_max;	149	I32 savestack_max;
29	OP **retstack;	150	OP **retstack;
30	I32 retstack_ix;	151	I32 retstack_ix;
31	I32 retstack_max;	152	I32 retstack_max;
		153	PMOP *curpm;
32	COP *curcop;	154	COP *curcop;
33		155
34	SV *proc;	156	/* coro process data */
		157	int prio;
35	};	158	};
36		159
37	typedef struct coro *Coro__State;	160	typedef struct coro *Coro__State;
38	typedef struct coro *Coro__State_or_hashref;	161	typedef struct coro *Coro__State_or_hashref;
39		162
40	#define SAVE(c) \	163	static AV *
		164	coro_clone_padlist (pTHX_ CV *cv)
		165	{
		166	AV *padlist = CvPADLIST (cv);
		167	AV newpadlist, newpad;
		168
		169	newpadlist = newAV ();
		170	AvREAL_off (newpadlist);
		171	#if PERL_VERSION < 9
		172	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		173	#else
		174	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		175	#endif
		176	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		177	--AvFILLp (padlist);
		178
		179	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
		180	av_store (newpadlist, 1, (SV *)newpad);
		181
		182	return newpadlist;
		183	}
		184
		185	static void
		186	free_padlist (pTHX_ AV *padlist)
		187	{
		188	/* may be during global destruction */
		189	if (SvREFCNT (padlist))
		190	{
		191	I32 i = AvFILLp (padlist);
		192	while (i >= 0)
		193	{
		194	SV **svp = av_fetch (padlist, i--, FALSE);
		195	if (svp)
		196	{
		197	SV *sv;
		198	while (&PL_sv_undef != (sv = av_pop ((AV )svp)))
		199	SvREFCNT_dec (sv);
		200
		201	SvREFCNT_dec (*svp);
		202	}
		203	}
		204
		205	SvREFCNT_dec ((SV*)padlist);
		206	}
		207	}
		208
		209	static int
		210	coro_cv_free (pTHX_ SV sv, MAGIC mg)
		211	{
		212	AV *padlist;
		213	AV av = (AV )mg->mg_obj;
		214
		215	/* casting is fun. */
		216	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
		217	free_padlist (aTHX_ padlist);
		218
		219	SvREFCNT_dec (av);
		220
		221	return 0;
		222	}
		223
		224	#define PERL_MAGIC_coro PERL_MAGIC_ext
		225
		226	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
		227
		228	/* the next two functions merely cache the padlists */
		229	static void
		230	get_padlist (pTHX_ CV *cv)
		231	{
		232	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);
		233
		234	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
		235	CvPADLIST (cv) = (AV )av_pop ((AV )mg->mg_obj);
		236	else
		237	{
		238	#if 0
		239	/* this should work - but it doesn't :( */
		240	CV *cp = Perl_cv_clone (aTHX_ cv);
		241	CvPADLIST (cv) = CvPADLIST (cp);
		242	CvPADLIST (cp) = 0;
		243	SvREFCNT_dec (cp);
		244	#else
		245	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		246	#endif
		247	}
		248	}
		249
		250	static void
		251	put_padlist (pTHX_ CV *cv)
		252	{
		253	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);
		254
		255	if (!mg)
		256	{
		257	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
		258	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		259	mg->mg_virtual = &vtbl_coro;
		260	mg->mg_obj = (SV *)newAV ();
		261	}
		262
		263	av_push ((AV )mg->mg_obj, (SV )CvPADLIST (cv));
		264	}
		265
		266	#define SB do {
		267	#define SE } while (0)
		268
		269	#define LOAD(state) load_state(aTHX_ (state));
		270	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
		271
		272	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
		273
		274	static void
		275	load_state(pTHX_ Coro__State c)
		276	{
		277	PL_dowarn = c->dowarn;
		278	PL_in_eval = c->in_eval;
		279
		280	PL_curstackinfo = c->curstackinfo;
		281	PL_curstack = c->curstack;
		282	PL_mainstack = c->mainstack;
		283	PL_stack_sp = c->stack_sp;
		284	PL_op = c->op;
		285	PL_curpad = c->curpad;
		286	PL_comppad = c->comppad;
		287	PL_compcv = c->compcv;
		288	PL_stack_base = c->stack_base;
		289	PL_stack_max = c->stack_max;
		290	PL_tmps_stack = c->tmps_stack;
		291	PL_tmps_floor = c->tmps_floor;
		292	PL_tmps_ix = c->tmps_ix;
		293	PL_tmps_max = c->tmps_max;
		294	PL_markstack = c->markstack;
		295	PL_markstack_ptr = c->markstack_ptr;
		296	PL_markstack_max = c->markstack_max;
		297	PL_scopestack = c->scopestack;
		298	PL_scopestack_ix = c->scopestack_ix;
		299	PL_scopestack_max = c->scopestack_max;
		300	PL_savestack = c->savestack;
		301	PL_savestack_ix = c->savestack_ix;
		302	PL_savestack_max = c->savestack_max;
		303	#if PERL_VERSION < 9
		304	PL_retstack = c->retstack;
		305	PL_retstack_ix = c->retstack_ix;
		306	PL_retstack_max = c->retstack_max;
		307	#endif
		308	PL_curpm = c->curpm;
		309	PL_curcop = c->curcop;
		310
		311	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
		312	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
		313	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		314
		315	{
		316	dSP;
		317	CV *cv;
		318
		319	/* now do the ugly restore mess */
		320	while ((cv = (CV *)POPs))
		321	{
		322	AV padlist = (AV )POPs;
		323
		324	if (padlist)
		325	{
		326	put_padlist (aTHX_ cv); /* mark this padlist as available */
		327	CvPADLIST(cv) = padlist;
		328	}
		329
		330	++CvDEPTH(cv);
		331	}
		332
		333	PUTBACK;
		334	}
		335	}
		336
		337	static void
		338	save_state(pTHX_ Coro__State c, int flags)
		339	{
		340	{
		341	dSP;
		342	I32 cxix = cxstack_ix;
		343	PERL_CONTEXT *ccstk = cxstack;
		344	PERL_SI *top_si = PL_curstackinfo;
		345
		346	/*
		347	* the worst thing you can imagine happens first - we have to save
		348	* (and reinitialize) all cv's in the whole callchain :(
		349	*/
		350
		351	PUSHs (Nullsv);
		352	/* this loop was inspired by pp_caller */
		353	for (;;)
		354	{
		355	while (cxix >= 0)
		356	{
		357	PERL_CONTEXT *cx = &ccstk[cxix--];
		358
		359	if (CxTYPE(cx) == CXt_SUB)
		360	{
		361	CV *cv = cx->blk_sub.cv;
		362	if (CvDEPTH(cv))
		363	{
		364	EXTEND (SP, CvDEPTH(cv)*2);
		365
		366	while (--CvDEPTH(cv))
		367	{
		368	/* this tells the restore code to increment CvDEPTH */
		369	PUSHs (Nullsv);
		370	PUSHs ((SV *)cv);
		371	}
		372
		373	PUSHs ((SV *)CvPADLIST(cv));
		374	PUSHs ((SV *)cv);
		375
		376	get_padlist (aTHX_ cv);
		377	}
		378	}
		379	#ifdef CXt_FORMAT
		380	else if (CxTYPE(cx) == CXt_FORMAT)
		381	{
		382	/* I never used formats, so how should I know how these are implemented? */
		383	/* my bold guess is as a simple, plain sub... */
		384	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
		385	}
		386	#endif
		387	}
		388
		389	if (top_si->si_type == PERLSI_MAIN)
		390	break;
		391
		392	top_si = top_si->si_prev;
		393	ccstk = top_si->si_cxstack;
		394	cxix = top_si->si_cxix;
		395	}
		396
		397	PUTBACK;
		398	}
		399
		400	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
		401	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
		402	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		403
41	c->dowarn = PL_dowarn; \	404	c->dowarn = PL_dowarn;
		405	c->in_eval = PL_in_eval;
		406
42	c->curstackinfo = PL_curstackinfo; \	407	c->curstackinfo = PL_curstackinfo;
43	c->curstack = PL_curstack; \	408	c->curstack = PL_curstack;
44	c->mainstack = PL_mainstack; \	409	c->mainstack = PL_mainstack;
45	c->stack_sp = PL_stack_sp; \	410	c->stack_sp = PL_stack_sp;
46	c->op = PL_op; \	411	c->op = PL_op;
47	c->curpad = PL_curpad; \	412	c->curpad = PL_curpad;
		413	c->comppad = PL_comppad;
		414	c->compcv = PL_compcv;
48	c->stack_base = PL_stack_base; \	415	c->stack_base = PL_stack_base;
49	c->stack_max = PL_stack_max; \	416	c->stack_max = PL_stack_max;
50	c->tmps_stack = PL_tmps_stack; \	417	c->tmps_stack = PL_tmps_stack;
51	c->tmps_floor = PL_tmps_floor; \	418	c->tmps_floor = PL_tmps_floor;
52	c->tmps_ix = PL_tmps_ix; \	419	c->tmps_ix = PL_tmps_ix;
53	c->tmps_max = PL_tmps_max; \	420	c->tmps_max = PL_tmps_max;
54	c->markstack = PL_markstack; \	421	c->markstack = PL_markstack;
55	c->markstack_ptr = PL_markstack_ptr; \	422	c->markstack_ptr = PL_markstack_ptr;
56	c->markstack_max = PL_markstack_max; \	423	c->markstack_max = PL_markstack_max;
57	c->scopestack = PL_scopestack; \	424	c->scopestack = PL_scopestack;
58	c->scopestack_ix = PL_scopestack_ix; \	425	c->scopestack_ix = PL_scopestack_ix;
59	c->scopestack_max = PL_scopestack_max;\	426	c->scopestack_max = PL_scopestack_max;
60	c->savestack = PL_savestack; \	427	c->savestack = PL_savestack;
61	c->savestack_ix = PL_savestack_ix; \	428	c->savestack_ix = PL_savestack_ix;
62	c->savestack_max = PL_savestack_max; \	429	c->savestack_max = PL_savestack_max;
		430	#if PERL_VERSION < 9
63	c->retstack = PL_retstack; \	431	c->retstack = PL_retstack;
64	c->retstack_ix = PL_retstack_ix; \	432	c->retstack_ix = PL_retstack_ix;
65	c->retstack_max = PL_retstack_max; \	433	c->retstack_max = PL_retstack_max;
		434	#endif
		435	c->curpm = PL_curpm;
66	c->curcop = PL_curcop;	436	c->curcop = PL_curcop;
		437	}
67		438
68	#define LOAD(c) \	439	/*
69	PL_dowarn = c->dowarn; \	440	* allocate various perl stacks. This is an exact copy
70	PL_curstackinfo = c->curstackinfo; \	441	* of perl.c:init_stacks, except that it uses less memory
71	PL_curstack = c->curstack; \	442	* on the (sometimes correct) assumption that coroutines do
72	PL_mainstack = c->mainstack; \	443	* not usually need a lot of stackspace.
73	PL_stack_sp = c->stack_sp; \	444	*/
74	PL_op = c->op; \	445	static void
75	PL_curpad = c->curpad; \	446	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	{	447	{
100	while (PL_curstackinfo->si_next)	448	LOCK;
		449
		450	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
		451	PL_curstackinfo->si_type = PERLSI_MAIN;
101	PL_curstackinfo = PL_curstackinfo->si_next;	452	PL_curstack = PL_curstackinfo->si_stack;
102	while (PL_curstackinfo) {	453	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
103	PERL_SI *p = PL_curstackinfo->si_prev;	454
104	/* curstackinfo->si_stack got nuked by sv_free_arenas() */	455	PL_stack_base = AvARRAY(PL_curstack);
105	Safefree(PL_curstackinfo->si_cxstack);	456	PL_stack_sp = PL_stack_base;
106	Safefree(PL_curstackinfo);	457	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
107	PL_curstackinfo = p;	458
		459	New(50,PL_tmps_stack,96,SV*);
		460	PL_tmps_floor = -1;
		461	PL_tmps_ix = -1;
		462	PL_tmps_max = 96;
		463
		464	New(54,PL_markstack,16,I32);
		465	PL_markstack_ptr = PL_markstack;
		466	PL_markstack_max = PL_markstack + 16;
		467
		468	#ifdef SET_MARK_OFFSET
		469	SET_MARK_OFFSET;
		470	#endif
		471
		472	New(54,PL_scopestack,16,I32);
		473	PL_scopestack_ix = 0;
		474	PL_scopestack_max = 16;
		475
		476	New(54,PL_savestack,96,ANY);
		477	PL_savestack_ix = 0;
		478	PL_savestack_max = 96;
		479
		480	#if PERL_VERSION < 9
		481	New(54,PL_retstack,8,OP*);
		482	PL_retstack_ix = 0;
		483	PL_retstack_max = 8;
		484	#endif
		485
		486	UNLOCK;
		487	}
		488
		489	/*
		490	* destroy the stacks, the callchain etc...
		491	*/
		492	static void
		493	destroy_stacks(pTHX)
		494	{
		495	if (!IN_DESTRUCT)
		496	{
		497	/* is this ugly, I ask? */
		498	LEAVE_SCOPE (0);
		499
		500	/* sure it is, but more important: is it correct?? :/ */
		501	FREETMPS;
		502
		503	/POPSTACK_TO (PL_mainstack);//D//use/
108	}	504	}
		505
		506	while (PL_curstackinfo->si_next)
		507	PL_curstackinfo = PL_curstackinfo->si_next;
		508
		509	while (PL_curstackinfo)
		510	{
		511	PERL_SI *p = PL_curstackinfo->si_prev;
		512
		513	{ /D//remove/
		514	dSP;
		515	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
		516	PUTBACK; /* possibly superfluous */
		517	}
		518
		519	if (!IN_DESTRUCT)
		520	{
		521	dounwind (-1);/D//remove/
		522	SvREFCNT_dec (PL_curstackinfo->si_stack);
		523	}
		524
		525	Safefree (PL_curstackinfo->si_cxstack);
		526	Safefree (PL_curstackinfo);
		527	PL_curstackinfo = p;
		528	}
		529
109	Safefree(PL_tmps_stack);	530	Safefree (PL_tmps_stack);
110	Safefree(PL_markstack);	531	Safefree (PL_markstack);
111	Safefree(PL_scopestack);	532	Safefree (PL_scopestack);
112	Safefree(PL_savestack);	533	Safefree (PL_savestack);
		534	#if PERL_VERSION < 9
113	Safefree(PL_retstack);	535	Safefree (PL_retstack);
		536	#endif
114	}	537	}
115		538
		539	static void
		540	setup_coro (struct coro *coro)
		541	{
		542	/*
		543	* emulate part of the perl startup here.
		544	*/
		545	dTHX;
		546	dSP;
		547	UNOP myop;
		548	SV sub_init = (SV )get_cv ("Coro::State::coro_init", FALSE);
		549
		550	coro_init_stacks (aTHX);
		551	/PL_curcop = 0;/
		552	/PL_in_eval = PL_in_eval;/ /* inherit */
		553	SvREFCNT_dec (GvAV (PL_defgv));
		554	GvAV (PL_defgv) = coro->args; coro->args = 0;
		555
		556	SPAGAIN;
		557
		558	Zero (&myop, 1, UNOP);
		559	myop.op_next = Nullop;
		560	myop.op_flags = OPf_WANT_VOID;
		561
		562	PL_op = (OP *)&myop;
		563
		564	PUSHMARK(SP);
		565	XPUSHs (sub_init);
		566	PUTBACK;
		567	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		568	SPAGAIN;
		569
		570	ENTER; /* necessary e.g. for dounwind */
		571	}
		572
		573	static void
		574	free_coro_mortal ()
		575	{
		576	if (coro_mortal)
		577	{
		578	SvREFCNT_dec (coro_mortal);
		579	coro_mortal = 0;
		580	}
		581	}
		582
		583	static void
		584	coro_run (void *arg)
		585	{
		586	/*
		587	* this is a _very_ stripped down perl interpreter ;)
		588	*/
		589	dTHX;
		590
		591	UNLOCK;
		592
		593	PL_top_env = &PL_start_env;
		594
		595	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));
		596	sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
		597
		598	/* continue at cctx_init, without entersub */
		599	PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
		600
		601	/* somebody will hit me for both perl_run and PL_restart_op */
		602	perl_run (aTHX_ PERL_GET_CONTEXT);
		603
		604	abort ();
		605	}
		606
		607	static coro_stack *
		608	stack_new ()
		609	{
		610	coro_stack *stack;
		611
		612	New (0, stack, 1, coro_stack);
		613
		614	#if HAVE_MMAP
		615
		616	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */
		617	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		618
		619	if (stack->sptr == (void *)-1)
		620	{
		621	perror ("FATAL: unable to mmap stack for coroutine");
		622	_exit (EXIT_FAILURE);
		623	}
		624
		625	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		626
		627	#else
		628
		629	stack->ssize = STACKSIZE * (long)sizeof (long);
		630	New (0, stack->sptr, STACKSIZE, long);
		631
		632	if (!stack->sptr)
		633	{
		634	perror (stderr, "FATAL: unable to malloc stack for coroutine");
		635	_exit (EXIT_FAILURE);
		636	}
		637
		638	#endif
		639
		640	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
		641
		642	return stack;
		643	}
		644
		645	static void
		646	stack_free (coro_stack *stack)
		647	{
		648	if (!stack \|\| stack == main_stack)
		649	return;
		650
		651	#if HAVE_MMAP
		652	munmap (stack->sptr, stack->ssize);
		653	#else
		654	Safefree (stack->sptr);
		655	#endif
		656
		657	Safefree (stack);
		658	}
		659
		660	static coro_stack *stack_first;
		661
		662	static coro_stack *
		663	stack_get ()
		664	{
		665	coro_stack *stack;
		666
		667	if (stack_first)
		668	{
		669	stack = stack_first;
		670	stack_first = stack->next;
		671	}
		672	else
		673	{
		674	stack = stack_new ();
		675	PL_op = PL_op->op_next;
		676	}
		677
		678	return stack;
		679	}
		680
		681	static void
		682	stack_put (coro_stack *stack)
		683	{
		684	stack->next = stack_first;
		685	stack_first = stack;
		686	}
		687
		688	/* never call directly, always through the coro_state_transfer global variable */
		689	static void
		690	transfer_impl (pTHX_ struct coro prev, struct coro next, int flags)
		691	{
		692	dSTACKLEVEL;
		693
		694	/* sometimes transfer is only called to set idle_sp */
		695	if (flags == TRANSFER_SET_STACKLEVEL)
		696	((coro_stack *)prev)->idle_sp = STACKLEVEL;
		697	else if (prev != next)
		698	{
		699	coro_stack *prev__stack;
		700
		701	LOCK;
		702
		703	if (next->mainstack)
		704	{
		705	/* coroutine already started */
		706	SAVE (prev, flags);
		707	LOAD (next);
		708	}
		709	else
		710	{
		711	/* need to start coroutine */
		712	/* first get rid of the old state */
		713	SAVE (prev, -1);
		714	/* setup coroutine call */
		715	setup_coro (next);
		716	/* need a stack */
		717	next->stack = 0;
		718	}
		719
		720	prev__stack = prev->stack;
		721
		722	/* possibly "free" the stack */
		723	if (prev__stack->idle_sp == STACKLEVEL)
		724	{
		725	stack_put (prev__stack);
		726	prev->stack = 0;
		727	}
		728
		729	if (!next->stack)
		730	next->stack = stack_get ();
		731
		732	if (prev__stack != next->stack)
		733	{
		734	prev__stack->top_env = PL_top_env;
		735	PL_top_env = next->stack->top_env;
		736	coro_transfer (&prev__stack->cctx, &next->stack->cctx);
		737	}
		738
		739	free_coro_mortal ();
		740
		741	UNLOCK;
		742	}
		743	}
		744
		745	/* use this function pointer to call the above function */
		746	/* this is done to increase chances of the compiler not inlining the call */
		747	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
		748	void (coro_state_transfer)(pTHX_ struct coro prev, struct coro *next, int flags) = transfer_impl;
		749
		750	struct transfer_args
		751	{
		752	struct coro prev, next;
		753	int flags;
		754	};
		755
		756	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)
		757
		758	static void
		759	coro_state_destroy (struct coro *coro)
		760	{
		761	if (coro->refcnt--)
		762	return;
		763
		764	if (coro->mainstack && coro->mainstack != main_mainstack)
		765	{
		766	struct coro temp;
		767
		768	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
		769	LOAD (aTHX_ coro);
		770
		771	destroy_stacks (aTHX);
		772
		773	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		774
		775	coro->mainstack = 0;
		776	}
		777
		778	stack_free (coro->stack);
		779	SvREFCNT_dec (coro->args);
		780	Safefree (coro);
		781	}
		782
		783	static int
		784	coro_state_clear (SV sv, MAGIC mg)
		785	{
		786	struct coro coro = (struct coro )mg->mg_ptr;
		787	mg->mg_ptr = 0;
		788
		789	coro_state_destroy (coro);
		790
		791	return 0;
		792	}
		793
		794	static int
		795	coro_state_dup (MAGIC mg, CLONE_PARAMS params)
		796	{
		797	struct coro coro = (struct coro )mg->mg_ptr;
		798
		799	++coro->refcnt;
		800
		801	return 0;
		802	}
		803
		804	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };
		805
		806	static struct coro *
		807	SvSTATE (SV *coro)
		808	{
		809	HV *stash;
		810	MAGIC *mg;
		811
		812	if (SvROK (coro))
		813	coro = SvRV (coro);
		814
		815	stash = SvSTASH (coro);
		816	if (stash != coro_stash && stash != coro_state_stash)
		817	{
		818	/* very slow, but rare, check */
		819	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		820	croak ("Coro::State object required");
		821	}
		822
		823	mg = SvMAGIC (coro);
		824	assert (mg->mg_type == PERL_MAGIC_ext);
		825	return (struct coro *)mg->mg_ptr;
		826	}
		827
		828	static void
		829	prepare_transfer (pTHX_ struct transfer_args ta, SV prev, SV *next, int flags)
		830	{
		831	ta->prev = SvSTATE (prev);
		832	ta->next = SvSTATE (next);
		833	ta->flags = flags;
		834	}
		835
		836	static void
		837	api_transfer (SV prev, SV next, int flags)
		838	{
		839	dTHX;
		840	struct transfer_args ta;
		841
		842	prepare_transfer (aTHX_ &ta, prev, next, flags);
		843	TRANSFER (ta);
		844	}
		845
		846	/ Coro ******************************************************************/
		847
		848	#define PRIO_MAX 3
		849	#define PRIO_HIGH 1
		850	#define PRIO_NORMAL 0
		851	#define PRIO_LOW -1
		852	#define PRIO_IDLE -3
		853	#define PRIO_MIN -4
		854
		855	/* for Coro.pm */
		856	static GV coro_current, coro_idle;
		857	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		858	static int coro_nready;
		859
		860	static void
		861	coro_enq (pTHX_ SV *sv)
		862	{
		863	int prio;
		864
		865	if (SvTYPE (sv) != SVt_PVHV)
		866	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		867
		868	prio = SvSTATE (sv)->prio;
		869
		870	av_push (coro_ready [prio - PRIO_MIN], sv);
		871	coro_nready++;
		872	}
		873
		874	static SV *
		875	coro_deq (pTHX_ int min_prio)
		876	{
		877	int prio = PRIO_MAX - PRIO_MIN;
		878
		879	min_prio -= PRIO_MIN;
		880	if (min_prio < 0)
		881	min_prio = 0;
		882
		883	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
		884	if (AvFILLp (coro_ready [prio]) >= 0)
		885	{
		886	coro_nready--;
		887	return av_shift (coro_ready [prio]);
		888	}
		889
		890	return 0;
		891	}
		892
		893	static void
		894	api_ready (SV *coro)
		895	{
		896	dTHX;
		897
		898	if (SvROK (coro))
		899	coro = SvRV (coro);
		900
		901	LOCK;
		902	coro_enq (aTHX_ SvREFCNT_inc (coro));
		903	UNLOCK;
		904	}
		905
		906	static void
		907	prepare_schedule (aTHX_ struct transfer_args *ta)
		908	{
		909	SV current, prev, *next;
		910
		911	LOCK;
		912
		913	current = GvSV (coro_current);
		914
		915	for (;;)
		916	{
		917	LOCK;
		918
		919	next = coro_deq (aTHX_ PRIO_MIN);
		920
		921	if (next)
		922	break;
		923
		924	UNLOCK;
		925
		926	{
		927	dSP;
		928
		929	ENTER;
		930	SAVETMPS;
		931
		932	PUSHMARK (SP);
		933	PUTBACK;
		934	call_sv (GvSV (coro_idle), G_DISCARD);
		935
		936	FREETMPS;
		937	LEAVE;
		938	}
		939	}
		940
		941	prev = SvRV (current);
		942	SvRV (current) = next;
		943
		944	/* free this only after the transfer */
		945	free_coro_mortal ();
		946	coro_mortal = prev;
		947
		948	ta->prev = SvSTATE (prev);
		949	ta->next = SvSTATE (next);
		950	ta->flags = TRANSFER_SAVE_ALL;
		951
		952	UNLOCK;
		953	}
		954
		955	static void
		956	prepare_cede (aTHX_ struct transfer_args *ta)
		957	{
		958	LOCK;
		959	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
		960	UNLOCK;
		961
		962	prepare_schedule (ta);
		963	}
		964
		965	static void
		966	api_schedule (void)
		967	{
		968	dTHX;
		969	struct transfer_args ta;
		970
		971	prepare_schedule (&ta);
		972	TRANSFER (ta);
		973	}
		974
		975	static void
		976	api_cede (void)
		977	{
		978	dTHX;
		979	struct transfer_args ta;
		980
		981	prepare_cede (&ta);
		982	TRANSFER (ta);
		983	}
		984
116	MODULE = Coro::State PACKAGE = Coro::State	985	MODULE = Coro::State PACKAGE = Coro::State
117		986
118	PROTOTYPES: ENABLE	987	PROTOTYPES: DISABLE
119		988
120	Coro::State	989	BOOT:
121	newprocess(proc)	990	{
122	SV * proc	991	#ifdef USE_ITHREADS
123	PROTOTYPE: &	992	MUTEX_INIT (&coro_mutex);
		993	#endif
		994	BOOT_PAGESIZE;
		995
		996	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
		997
		998	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
		999	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
		1000	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
		1001
		1002	main_mainstack = PL_mainstack;
		1003
		1004	coroapi.ver = CORO_API_VERSION;
		1005	coroapi.transfer = api_transfer;
		1006
		1007	Newz (0, main_stack, 1, coro_stack);
		1008	main_stack->idle_sp = (void *)-1;
		1009
		1010	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
		1011	}
		1012
		1013	SV *
		1014	new (char *klass, ...)
124	CODE:	1015	CODE:
125	Coro__State coro;	1016	{
126		1017	struct coro *coro;
		1018	HV *hv;
		1019	int i;
		1020
127	New (0, coro, 1, struct coro);	1021	Newz (0, coro, 1, struct coro);
		1022	coro->args = newAV ();
128		1023
		1024	hv = newHV ();
		1025	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
		1026	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1027
		1028	for (i = 1; i < items; i++)
		1029	av_push (coro->args, newSVsv (ST (i)));
		1030
		1031	coro->stack = main_stack;
129	coro->mainstack = 0; /* actual work is done inside transfer */	1032	/coro->mainstack = 0; //actual work is done inside transfer /
130	coro->proc = SvREFCNT_inc (proc);	1033	/coro->stack = 0;/
131		1034	}
132	RETVAL = coro;
133	OUTPUT:	1035	OUTPUT:
134	RETVAL	1036	RETVAL
135		1037
136	void	1038	void
137	transfer(prev,next)	1039	transfer (...)
138	Coro::State_or_hashref prev	1040	ALIAS:
139	Coro::State_or_hashref next	1041	Coro::schedule = 1
		1042	Coro::cede = 2
		1043	_set_stacklevel = 3
140	CODE:	1044	CODE:
		1045	{
		1046	struct transfer_args ta;
141		1047
142	PUTBACK;	1048	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	{	1049	{
153	LOAD (next);	1050	case 0:
154	next->mainstack = 0; /* unnecessary but much cleaner */	1051	if (items != 3)
155	SPAGAIN;	1052	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1053
		1054	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1055	break;
		1056
		1057	case 1:
		1058	prepare_schedule (&ta);
		1059	break;
		1060
		1061	case 2:
		1062	prepare_cede (&ta);
		1063	break;
		1064
		1065	case 3:
		1066	ta.prev = (struct coro )INT2PTR (coro_stack , SvIV (ST (0)));
		1067	ta.next = 0;
		1068	ta.flags = TRANSFER_SET_STACKLEVEL;
		1069	break;
156	}	1070	}
		1071
		1072	TRANSFER (ta);
		1073	}
		1074
		1075	void
		1076	_clone_state_from (SV dst, SV src)
		1077	CODE:
		1078	{
		1079	struct coro *coro_src = SvSTATE (src);
		1080
		1081	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
		1082
		1083	++coro_src->refcnt;
		1084	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags \|= MGf_DUP;
		1085	}
		1086
		1087	void
		1088	_nonlocal_goto (IV nextop)
		1089	CODE:
		1090	/* uuh, somebody will kill me again for this */
		1091	PL_op->op_next = INT2PTR (OP *, nextop);
		1092
		1093	void
		1094	_exit (code)
		1095	int code
		1096	PROTOTYPE: $
		1097	CODE:
		1098	_exit (code);
		1099
		1100	MODULE = Coro::State PACKAGE = Coro::Cont
		1101
		1102	void
		1103	yield (...)
		1104	PROTOTYPE: @
		1105	CODE:
		1106	{
		1107	SV *yieldstack;
		1108	SV *sv;
		1109	AV *defav = GvAV (PL_defgv);
		1110	struct coro prev, next;
		1111
		1112	yieldstack = *hv_fetch (
		1113	(HV *)SvRV (GvSV (coro_current)),
		1114	"yieldstack", sizeof ("yieldstack") - 1,
		1115	0
		1116	);
		1117
		1118	/* set up @_ -- ugly */
		1119	av_clear (defav);
		1120	av_fill (defav, items - 1);
		1121	while (items--)
		1122	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1123
		1124	sv = av_pop ((AV *)SvRV (yieldstack));
		1125	prev = SvSTATE (av_fetch ((AV )SvRV (sv), 0, 0));
		1126	next = SvSTATE (av_fetch ((AV )SvRV (sv), 1, 0));
		1127	SvREFCNT_dec (sv);
		1128
		1129	coro_state_transfer (aTHX_ prev, next, 0);
		1130	}
		1131
		1132	MODULE = Coro::State PACKAGE = Coro
		1133
		1134	BOOT:
		1135	{
		1136	int i;
		1137
		1138	coro_stash = gv_stashpv ("Coro", TRUE);
		1139
		1140	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
		1141	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
		1142	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
		1143	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
		1144	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
		1145	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
		1146
		1147	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
		1148	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
		1149
		1150	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
		1151	coro_ready[i] = newAV ();
		1152
157	else	1153	{
		1154	SV *sv = perl_get_sv("Coro::API", 1);
		1155
		1156	coroapi.schedule = api_schedule;
		1157	coroapi.cede = api_cede;
		1158	coroapi.ready = api_ready;
		1159	coroapi.nready = &coro_nready;
		1160	coroapi.current = coro_current;
		1161
		1162	GCoroAPI = &coroapi;
		1163	sv_setiv (sv, (IV)&coroapi);
		1164	SvREADONLY_on (sv);
		1165	}
		1166	}
		1167
		1168	int
		1169	prio (Coro::State coro, int newprio = 0)
		1170	ALIAS:
		1171	nice = 1
		1172	CODE:
		1173	{
		1174	RETVAL = coro->prio;
		1175
		1176	if (items > 1)
158	{	1177	{
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		1178	if (ix)
176	PUTBACK;	1179	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		1180
186	ENTER;	1181	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1182	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1183
		1184	coro->prio = newprio;
187	}	1185	}
		1186	}
188		1187
189	void	1188	void
190	DESTROY(coro)	1189	ready (SV *self)
191	Coro::State coro	1190	PROTOTYPE: $
		1191	CODE:
		1192	api_ready (self);
		1193
		1194	int
		1195	nready (...)
		1196	PROTOTYPE:
192	CODE:	1197	CODE:
		1198	RETVAL = coro_nready;
		1199	OUTPUT:
		1200	RETVAL
193		1201
194	if (coro->mainstack)	1202	MODULE = Coro::State PACKAGE = Coro::AIO
195	{
196	struct coro temp;
197		1203
198	PUTBACK;	1204	SV *
199	SAVE((&temp));	1205	_get_state ()
200	LOAD(coro);	1206	CODE:
		1207	{
		1208	struct {
		1209	int errorno;
		1210	int laststype;
		1211	int laststatval;
		1212	Stat_t statcache;
		1213	} data;
201		1214
202	S_nuke_stacks ();	1215	data.errorno = errno;
		1216	data.laststype = PL_laststype;
		1217	data.laststatval = PL_laststatval;
		1218	data.statcache = PL_statcache;
203		1219
204	LOAD((&temp));	1220	RETVAL = newSVpvn ((char *)&data, sizeof data);
205	SPAGAIN;	1221	}
206	}	1222	OUTPUT:
		1223	RETVAL
207		1224
208	SvREFCNT_dec (coro->proc);	1225	void
209	Safefree (coro);	1226	_set_state (char *data_)
		1227	PROTOTYPE: $
		1228	CODE:
		1229	{
		1230	struct {
		1231	int errorno;
		1232	int laststype;
		1233	int laststatval;
		1234	Stat_t statcache;
		1235	} data = (void )data_;
210		1236
211		1237	errno = data->errorno;
		1238	PL_laststype = data->laststype;
		1239	PL_laststatval = data->laststatval;
		1240	PL_statcache = data->statcache;
		1241	}

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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 1.93 by root, Sun Nov 26 03:22:50 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 1.93 by root, Sun Nov 26 03:22:50 2006 UTC