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/* Copyright (c) 1990 Regents of the University of California */ |
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|
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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#endif |
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|
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/* |
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* Basic memory allocation w/o overhead. |
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* Calls malloc(3) for big requests. |
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* |
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*/ |
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|
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#define NULL 0 |
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|
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#ifndef MBLKSIZ |
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#define MBLKSIZ 16376 /* size of memory allocation block */ |
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#endif |
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#define WASTEFRAC 4 /* don't waste more than this */ |
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#ifndef ALIGN |
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#define ALIGN int /* type for alignment */ |
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#endif |
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#define BYTES_WORD sizeof(ALIGN) |
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|
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|
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char * |
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bmalloc(n) /* allocate a block of n bytes, no refunds */ |
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register unsigned n; |
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{ |
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extern char *malloc(); |
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static char *bpos = NULL; |
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static unsigned nrem = 0; |
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|
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if (n > nrem && (n > MBLKSIZ || nrem > MBLKSIZ/WASTEFRAC)) |
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return(malloc(n)); /* too big */ |
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|
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n = (n+(BYTES_WORD-1))&~(BYTES_WORD-1); /* word align */ |
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|
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if (n > nrem) { |
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if ((bpos = malloc((unsigned)MBLKSIZ)) == NULL) { |
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nrem = 0; |
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return(NULL); |
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} |
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nrem = MBLKSIZ; |
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} |
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bpos += n; |
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nrem -= n; |
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return(bpos - n); |
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} |
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|
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|
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bfree(p, n) /* free random memory */ |
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char *p; |
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unsigned n; |
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{ |
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/* not implemented */ |
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} |
