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#include "rtmisc.h" |
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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 12 /* don't waste more than a fraction */ |
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#ifndef ALIGNT |
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#define ALIGNT double /* type for alignment */ |
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#endif |
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#define BYTES_WORD sizeof(ALIGNT) |
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static void *bposition = NULL; |
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#ifndef MBLKSIZ /* size of memory allocation block */ |
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#define MBLKSIZ ((1<<15)-BYTES_WORD) |
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> |
#endif |
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#define WASTEFRAC 12 /* don't waste more than a fraction */ |
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> |
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> |
static char *bposition = NULL; |
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static size_t nremain = 0; |
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void * |
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bmalloc( /* allocate a block of n bytes */ |
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register size_t n |
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bmalloc( /* quickly allocate a block of n bytes */ |
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size_t n |
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) |
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{ |
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< |
if (n > nremain && (n > MBLKSIZ || nremain > MBLKSIZ/WASTEFRAC)) |
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if ((n > nremain) & ((n > MBLKSIZ) | (nremain > MBLKSIZ/WASTEFRAC))) |
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return(malloc(n)); /* too big */ |
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n = (n+(BYTES_WORD-1))&~(BYTES_WORD-1); /* word align */ |
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n = (n+(BYTES_WORD-1)) & ~(BYTES_WORD-1); /* word align */ |
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if (n > nremain && (bposition = malloc(nremain = MBLKSIZ)) == NULL) { |
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nremain = 0; |
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return(bposition - n); |
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} |
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void |
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bfree( /* free random memory */ |
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register void *p, |
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< |
register size_t n |
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> |
bfree( /* free some memory; anything in process space */ |
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> |
void *pp, |
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> |
size_t n |
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) |
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{ |
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< |
register size_t bsiz; |
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> |
char *p = pp; |
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> |
size_t bsiz; |
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/* check alignment */ |
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bsiz = BYTES_WORD - ((size_t)p&(BYTES_WORD-1)); |
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if (bsiz < BYTES_WORD) { |
