Subversion Repositories planix.SVN

#include <u.h>
#include <libc.h>
#include <thread.h>

static Lock l;

void
_xinc(long *p)
{

        lock(&l);
        (*p)++;
        unlock(&l);
}

long
_xdec(long *p)
{
        long r;

        lock(&l);
        r = --(*p);
        unlock(&l);
        return r;
}