gname_def.h

T-kernel 的extension源代码

/*
 *----------------------------------------------------------------------
 *    T-Kernel / Standard Extension
 *
 *    Copyright (C) 2006 by Ken Sakamura. All rights reserved.
 *    T-Kernel / Standard Extension is distributed 
 *      under the T-License for T-Kernel / Standard Extension.
 *----------------------------------------------------------------------
 *
 *    Version:   1.00.00
 *    Released by T-Engine Forum(http://www.t-engine.org) at 2006/8/11.
 *
 *----------------------------------------------------------------------
 */

/*
 *	gname_def.h (gname)
 *
 *	Global name management
 */

#ifndef __GName_Def_H__
#define __GName_Def_H__ 1

#include <basic.h>
#include <sys/queue.h>

/* It is assumed the entry count of the global name is about 256. */
/* A prime is desirable. */
#define NumOfHashEntries	257
#define HashRate		NumOfHashEntries

/* Maximum character count of the global name */
#define GlobalNameLengthLimit	256

#ifdef DEBUG
#  define NumOfPoolEntries	256
#endif

/* For storing the global name */
typedef struct {
	W	numOfNames;			/* Valid character count */
	TC	name[GlobalNameLengthLimit];	/* Global name */
} GlobalName;

/* Entry holding the global data */
typedef struct {
	QUEUE		queue;		/* link for QUEUE */
	UW		searchKey;	/* Value of the hashed global name */
	ID		pid;		/* Process ID */
	GlobalName	gname;		/* Global name */
	W		data;		/* Data */
	UW		atr;		/* Attribute */
} GNameEntry;

#define InvalidKey		(-1)
#define InvalidPID		(0)

#define OffsetOfSearchKey	8
#define OffsetOfPID		12

/* For entry management  The first one of the queue */
/* As a result of the global name being hashed, the collided entry is linked. */
typedef QUEUE	ListOfEntry;

/* Prototype */
#ifdef DEBUG
IMPORT ID	getPID(void);
#endif

#endif /* __GName_Def_H__ */