34 lines
516 B
C
34 lines
516 B
C
#include "lib.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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int k;
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k = callm1(MM, BRK, 0, 0, 0, addr, NIL_PTR, NIL_PTR);
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if (k == OK) {
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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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extern int endv, dorgv;
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oldsize = brksize;
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newsize = brksize + incr;
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if (incr > 0 && newsize < oldsize) 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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