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/*
Interface definitions for bget.c, the memory management package.
*/
typedef long bufsize;
struct qlinks {
struct bfhead *flink; /* Forward link */
struct bfhead *blink; /* Backward link */
};
/* Header in allocated and free buffers */
struct bhead {
bufsize prevfree; /* Relative link back to previous
free buffer in memory or 0 if
previous buffer is allocated. */
bufsize bsize; /* Buffer size: positive if free,
negative if allocated. */
};
#define BH(p) ((struct bhead *) (p))
/* Header in directly allocated buffers (by acqfcn) */
struct bdhead {
bufsize tsize; /* Total size, including overhead */
struct bhead bh; /* Common header */
};
#define BDH(p) ((struct bdhead *) (p))
/* Header in free buffers */
struct bfhead {
struct bhead bh; /* Common allocated/free header */
struct qlinks ql; /* Links on free list */
};
#define BFH(p) ((struct bfhead *) (p))
class BGet
{
public:
BGet();
struct bfhead freelist;/* = {
{0, 0},
{&freelist, &freelist}
};*/ /* List of free buffers */
void *(*acqfcn) (bufsize size);;
void bpool (void *buffer, bufsize len);
void *bget (bufsize size);
void *bgetz (bufsize size);
void *bgetr (void *buffer, bufsize newsize);
void brel (void *buf);
void bectl (void *(*acquire) (bufsize size), bufsize pool_incr);
};
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