25 lines
539 B
C
25 lines
539 B
C
/* This is an ANSI C version of the classic K&R memory allocator, with
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* some improvements stolen from the Fuzix libc.
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*/
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#ifndef MALLOC_H
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#define MALLOC_H
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typedef struct block_s {
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struct block_s* next;
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size_t size; /* in sizeof(block_t) units */
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} block_t;
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extern block_t __mem_root;
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extern block_t* __mem_first_free;
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#define BLOCKOF(p) (((block_t*)(p)) - 1)
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/* Smallest amount to allocate from brk */
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#define BRKSIZE (512 / sizeof(block_t))
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#define BLOCKCOUNT(bytes) \
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(bytes + sizeof(block_t) + sizeof(block_t) - 1)
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#endif
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