portdat.h

著名操作系统Plan 9的第三版的部分核心源代码。现在很难找到了。Plan 9是bell实验室开发的Unix后继者。

	Pte	**map;
	int	mapsize;
	Pte	*ssegmap[SSEGMAPSIZE];
};

enum
{
	RENDHASH =	32,		/* Hash to lookup rendezvous tags */
	MNTHASH	=	32,		/* Hash to walk mount table */
	NFD =		100,		/* per process file descriptors */
	PGHLOG  =	9,
	PGHSIZE	=	1<<PGHLOG,	/* Page hash for image lookup */
};
#define REND(p,s)	((p)->rendhash[(s)%RENDHASH])
#define MOUNTH(p,s)	((p)->mnthash[(s)->qid.path%MNTHASH])

struct Pgrp
{
	Ref;				/* also used as a lock when mounting */
	int	noattach;
	ulong	pgrpid;
	QLock	debug;			/* single access via devproc.c */
	RWlock	ns;			/* Namespace n read/one write lock */
	QLock	nsh;
	Mhead	*mnthash[MNTHASH];
};

struct Rgrp
{
	Ref;
	Proc	*rendhash[RENDHASH];	/* Rendezvous tag hash */
};

struct Egrp
{
	Ref;
	QLock;
	Evalue	*entries;
	ulong	path;	/* qid.path of next Evalue to be allocated */
	ulong	vers;	/* of Egrp */
};

struct Evalue
{
	char	*name;
	char	*value;
	int	len;
	Evalue	*link;
	Qid	qid;
};

struct Fgrp
{
	Ref;
	Chan	**fd;
	int	nfd;			/* number allocated */
	int	maxfd;			/* highest fd in use */
};

enum
{
	DELTAFD	= 20		/* incremental increase in Fgrp.fd's */
};

struct Palloc
{
	Lock;
	ulong	p0, p1;			/* base of pages in bank 0/1 */
	ulong	np0, np1;		/* number of pages in bank 0/1 */
	Page	*head;			/* most recently used */
	Page	*tail;			/* least recently used */
	ulong	freecount;		/* how many pages on free list now */
	ulong	user;			/* how many user pages */
	Page	*hash[PGHSIZE];
	Lock	hashlock;
	Rendez	r;			/* Sleep for free mem */
	QLock	pwait;			/* Queue of procs waiting for memory */
	ulong	cmembase;		/* Key memory */
	ulong	cmemtop;
};

struct Waitq
{
	Waitmsg	w;
	Waitq	*next;
};

enum
{
	RFNAMEG		= (1<<0),
	RFENVG		= (1<<1),
	RFFDG		= (1<<2),
	RFNOTEG		= (1<<3),
	RFPROC		= (1<<4),
	RFMEM		= (1<<5),
	RFNOWAIT	= (1<<6),
	RFCNAMEG	= (1<<10),
	RFCENVG		= (1<<11),
	RFCFDG		= (1<<12),
	RFREND		= (1<<13),
	RFNOMNT		= (1<<14),
};

/*
 *  process memory segments - NSEG always last !
 */
enum
{
	SSEG, TSEG, DSEG, BSEG, ESEG, LSEG, SEG1, SEG2, SEG3, SEG4, NSEG
};

enum
{
	Dead = 0,		/* Process states */
	Moribund,
	Ready,
	Scheding,
	Running,
	Queueing,
	QueueingR,
	QueueingW,
	Wakeme,
	Broken,
	Stopped,
	Rendezvous,

	Proc_stopme = 1, 	/* devproc requests */
	Proc_exitme,
	Proc_traceme,
	Proc_exitbig,

	TUser = 0, 		/* Proc.time */
	TSys,
	TReal,
	TCUser,
	TCSys,
	TCReal,

	NERR = 15,
	NNOTE = 5,

	Nrq		= 20,	/* number of scheduler priority levels */
	PriLock		= 0,	/* priority for processes waiting on a lock */
	PriNormal	= 10,	/* base priority for normal processes */
	PriKproc	= 13,	/* base priority for kernel processes */
	PriRoot		= 13,	/* base priority for root processes */
};

struct Proc
{
	Label	sched;		/* known to l.s */
	char	*kstack;	/* known to l.s */
	Mach	*mach;		/* machine running this proc */
	char	text[NAMELEN];
	char	user[NAMELEN];
	Proc	*rnext;		/* next process in run queue */
	Proc	*qnext;		/* next process on queue for a QLock */
	QLock	*qlock;		/* addrof qlock being queued for DEBUG */
	int	state;
	char	*psstate;	/* What /proc/#/status reports */
	Segment	*seg[NSEG];
	QLock	seglock;	/* locked whenever seg[] changes */
	ulong	pid;
	ulong	noteid;		/* Equivalent of note group */

	Lock	exl;		/* Lock count and waitq */
	Waitq	*waitq;		/* Exited processes wait children */
	int	nchild;		/* Number of living children */
	int	nwait;		/* Number of uncollected wait records */
	QLock	qwaitr;
	Rendez	waitr;		/* Place to hang out in wait */
	Proc	*parent;

	Pgrp	*pgrp;		/* Process group for namespace */
	Egrp 	*egrp;		/* Environment group */
	Fgrp	*fgrp;		/* File descriptor group */
	Rgrp	*rgrp;		/* Rendez group */

	ulong	parentpid;
	ulong	time[6];	/* User, Sys, Real; child U, S, R */
	short	insyscall;
	int	fpstate;

	QLock	debug;		/* to access debugging elements of User */
	Proc	*pdbg;		/* the debugging process */
	ulong	procmode;	/* proc device file mode */
	int	hang;		/* hang at next exec for debug */
	int	procctl;	/* Control for /proc debugging */
	ulong	pc;		/* DEBUG only */

	Lock	rlock;		/* sync sleep/wakeup with postnote */
	Rendez	*r;		/* rendezvous point slept on */
	Rendez	sleep;		/* place for syssleep/debug */
	int	notepending;	/* note issued but not acted on */
	int	kp;		/* true if a kernel process */
	Proc	*palarm;	/* Next alarm time */
	ulong	alarm;		/* Time of call */
	int	newtlb;		/* Pager has changed my pte's, I must flush */

	ulong	rendtag;	/* Tag for rendezvous */
	ulong	rendval;	/* Value for rendezvous */
	Proc	*rendhash;	/* Hash list for tag values */

	ulong	twhen;
	Rendez	*trend;
	Proc	*tlink;
	int	(*tfn)(void*);
	void	(*kpfun)(void*);
	void	*kparg;

	FPsave	fpsave;		/* address of this is known by db */
	int	scallnr;	/* sys call number - known by db */
	Sargs	s;		/* address of this is known by db */
	int	nerrlab;
	Label	errlab[NERR];
	char	error[ERRLEN];
	char	elem[NAMELEN];	/* last name element from namec */
	Chan	*slash;
	Chan	*dot;

	Note	note[NNOTE];
	short	nnote;
	short	notified;	/* sysnoted is due */
	Note	lastnote;
	int	(*notify)(void*, char*);

	int	lockwait;	/* waiting for lock to be released */

	Mach	*wired;
	Mach	*mp;		/* machine this process last ran on */
	ulong	priority;	/* priority level */
	ulong	basepri;	/* base priority level */
	ulong	rt;		/* # ticks used since last blocked */
	ulong	art;		/* avg # ticks used since last blocked */
	ulong	movetime;	/* last time process switched processors */
	ulong	readytime;	/* time process went ready */
	int	preempted;	/* true if this process hasn't finished the interrupt
				 *  that last preempted it
				 */
	ulong	qpc;		/* pc calling last blocking qlock */

	void	*ureg;		/* User registers for notes */
	void	*dbgreg;	/* User registers for devproc */
	Notsave;

	/*
	 *  machine specific MMU
	 */
	PMMU;
};

enum
{
	PRINTSIZE =	256,
	MAXCRYPT = 	127,
	NUMSIZE	=	12,		/* size of formatted number */
	MB =		(1024*1024),
	READSTR =	1000,		/* temporary buffer size for device reads */
};

extern	Conf	conf;
extern	char*	conffile;
extern	int	cpuserver;
extern	Dev*	devtab[];
extern  char	eve[];
extern	char	hostdomain[];
extern	uchar	initcode[];
extern	FPsave	initfp;
extern  Queue*	kbdq;
extern  Ref	noteidalloc;
extern	int	nrdy;
extern	Palloc	palloc;
extern  Queue	*printq;
extern	char*	statename[];
extern  Image	swapimage;
extern	char	sysname[NAMELEN];
extern	Pthash	syspt;
extern	Talarm	talarm;

enum
{
	CHDIR =		0x80000000L,
	CHAPPEND = 	0x40000000L,
	CHEXCL =	0x20000000L,
	CHMOUNT	=	0x10000000L,
};

/*
 * auth messages
 */
enum
{
	FScchal	= 1,
	FSschal,
	FSok,
	FSctick,
	FSstick,
	FSerr,

	RXschal	= 0,
	RXstick	= 1,

	AUTHLEN	= 8,
};

enum
{
	LRESPROF	= 3,
};

/*
 *  action log
 */
struct Log {
	Lock;
	int	opens;
	char*	buf;
	char	*end;
	char	*rptr;
	int	len;

	int	logmask;	/* mask of things to debug */

	QLock	readq;
	Rendez	readr;
};

struct Logflag {
	char*	name;
	int	mask;
};

struct Cmdbuf
{
	char	buf[256];
	char	*f[16];
	int	nf;
};

extern int nsyscall;

#define DEVDOTDOT -1

#pragma	varargck	argpos	print	1
#pragma	varargck	argpos	snprint	3
#pragma	varargck	argpos	sprint	2
#pragma	varargck	argpos	fprint	2

#pragma	varargck	type	"lld"	vlong
#pragma	varargck	type	"llx"	vlong
#pragma	varargck	type	"lld"	uvlong
#pragma	varargck	type	"llx"	uvlong
#pragma	varargck	type	"lx"	void*
#pragma	varargck	type	"ld"	long
#pragma	varargck	type	"lx"	long
#pragma	varargck	type	"ld"	ulong
#pragma	varargck	type	"lx"	ulong
#pragma	varargck	type	"d"	int
#pragma	varargck	type	"x"	int
#pragma	varargck	type	"c"	int
#pragma	varargck	type	"C"	int
#pragma	varargck	type	"d"	uint
#pragma	varargck	type	"x"	uint
#pragma	varargck	type	"c"	uint
#pragma	varargck	type	"C"	uint
#pragma	varargck	type	"f"	double
#pragma	varargck	type	"e"	double
#pragma	varargck	type	"g"	double
#pragma	varargck	type	"s"	char*
#pragma	varargck	type	"S"	Rune*
#pragma	varargck	type	"r"	void
#pragma	varargck	type	"%"	void
#pragma	varargck	type	"I"	uchar*
#pragma	varargck	type	"V"	uchar*
#pragma	varargck	type	"E"	uchar*
#pragma	varargck	type	"M"	uchar*
#pragma	varargck	type	"p"	void*