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SGI Developer Toolbox 6.1
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SGI Developer Toolbox 6.1 - Disc 4.iso
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haeberli
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bufpool.h
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C/C++ Source or Header
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1994-08-01
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/*
* Copyright 1991, 1992, 1993, 1994, Silicon Graphics, Inc.
* All Rights Reserved.
*
* This is UNPUBLISHED PROPRIETARY SOURCE CODE of Silicon Graphics, Inc.;
* the contents of this file may not be disclosed to third parties, copied or
* duplicated in any form, in whole or in part, without the prior written
* permission of Silicon Graphics, Inc.
*
* RESTRICTED RIGHTS LEGEND:
* Use, duplication or disclosure by the Government is subject to restrictions
* as set forth in subdivision (c)(1)(ii) of the Rights in Technical Data
* and Computer Software clause at DFARS 252.227-7013, and/or in similar or
* successor clauses in the FAR, DOD or NASA FAR Supplement. Unpublished -
* rights reserved under the Copyright Laws of the United States.
*/
/* bufpool.h */
#ifndef BUFPOOL
#define BUFPOOL
#define NBLOCKS 32
typedef enum { is_allocated = 0xf3a1, is_free = 0xf1a2 } Magic;
typedef struct _buffer {
struct _buffer *next; /* next buffer on free list */
} Buffer ;
typedef struct _Pool {
Buffer *freelist; /* linked list of free buffers */
char *blocklist[NBLOCKS]; /* blocks of malloced memory */
int nextblock; /* next free block index */
char *curblock; /* last malloced block */
int buffersize; /* bytes per buffer */
int nextsize; /* size of next block of memory */
int nextfree; /* byte offset past next free buffer */
#ifndef NDEBUG
char *name; /* name of the pool */
Magic magic; /* marker for valid pool */
#endif
} Pool;
extern Pool *new_pool( int, int, char * );
extern char *new_buffer( Pool * );
extern void free_buffer( Pool *, void * );
extern void clear_pool( Pool * );
#endif