32 lines
524 B
C
32 lines
524 B
C
/* $Source: /cvsroot/tack/Ack/plat/linux386/libsys/sbrk.c,v $
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* $State: Exp $
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* $Revision: 1.1 $
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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#include "libsys.h"
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#define OUT_OF_MEMORY (void*)(-1) /* sbrk returns this on failure */
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extern char _end[1];
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static char* current = _end;
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void* sbrk(intptr_t increment)
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{
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char* old;
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char* new;
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if (increment == 0)
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return current;
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old = current;
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new = old + increment;
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if (brk(new) < 0)
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return OUT_OF_MEMORY;
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current = new;
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return old;
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}
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