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33 lines
898 B
33 lines
898 B
/* bufpool.h */
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#ifndef BUFPOOL
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#define BUFPOOL
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#define NBLOCKS 32
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typedef enum { is_allocated = 0xf3a1, is_free = 0xf1a2 } Magic;
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typedef struct _buffer {
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struct _buffer *next; /* next buffer on free list */
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} Buffer ;
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typedef struct Pool {
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Buffer *freelist; /* linked list of free buffers */
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char *blocklist[NBLOCKS]; /* blocks of malloced memory */
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int nextblock; /* next free block index */
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char *curblock; /* last malloced block */
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int buffersize; /* bytes per buffer */
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int nextsize; /* size of next block of memory */
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int nextfree; /* byte offset past next free buffer */
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#ifndef NDEBUG
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char *name; /* name of the pool */
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Magic magic; /* marker for valid pool */
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#endif
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} Pool;
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extern Pool *__gl_new_pool( int, int, char * );
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extern char *__gl_new_buffer( Pool * );
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extern void __gl_free_buffer( Pool *, void * );
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extern void __gl_clear_pool( Pool * );
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#endif
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