Subversion Repositories planix.SVN

#include "lib.h"
#include <errno.h>
#include "sys9.h"

char    end[];
static  char    *bloc = { end };
extern  int     _BRK_(void*);

char *
brk(char *p)
{
        unsigned long n;

        n = (unsigned long)p;
        n += 3;
        n &= ~3;
        if(_BRK_((void*)n) < 0){
                errno = ENOMEM;
                return (char *)-1;
        }
        bloc = (char *)n;
        return 0;
}

void *
sbrk(unsigned long n)
{
        n += 3;
        n &= ~3;
        if(_BRK_((void *)(bloc+n)) < 0){
                errno = ENOMEM;
                return (void *)-1;
        }
        bloc += n;
        return (void *)(bloc-n);
}