gistfile1.java

    DirectByteBuffer(int cap) {    		// package-private

        super(-1, 0, cap, cap, false);
        Bits.reserveMemory( cap );
        int ps = Bits.pageSize();
        long base = 0;
        try {
            base = unsafe.allocateMemory(cap + ps);
        } catch (OutOfMemoryError x) {
            Bits.unreserveMemory(cap);
            throw x;
        }
        unsafe.setMemory(base, cap + ps, (byte) 0);
        if (base % ps != 0) {
            // Round up to page boundary
            address = base + ps - (base & (ps - 1));
        } else {
            address = base;
        }
        cleaner = Cleaner.create( this, new Deallocator( base, cap ) );
        viewedBuffer = null;

    }