33 lines
562 B
C
33 lines
562 B
C
#include <lib.h>
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#define brk _brk
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#define sbrk _sbrk
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#include <unistd.h>
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extern char *_brksize;
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PUBLIC char *brk(addr)
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char *addr;
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{
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if (_callm1(MM, BRK, 0, 0, 0, addr, NIL_PTR, NIL_PTR) == 0) {
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_brksize = _M.m2_p1;
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return(NIL_PTR);
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} else {
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return((char *) -1);
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}
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}
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PUBLIC char *sbrk(incr)
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int incr;
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{
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char *newsize, *oldsize;
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oldsize = _brksize;
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newsize = _brksize + incr;
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if (incr > 0 && newsize < oldsize || incr < 0 && newsize > oldsize)
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return((char *) -1);
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if (_brk(newsize) == 0)
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return(oldsize);
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else
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return((char *) -1);
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}
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