Add missing safety comments. am: 03350bc9 am: b3327511 am: 1ef3979c am: b6f2ded4

    #[test]

    #[should_panic]

    fn take_from_raw_panics_on_null() {

        // SAFETY: Passing a null pointer is safe, it should just panic.

        unsafe { AHardwareBuffer::take_from_raw(ptr::null_mut()) };

    }

        };

        let mut raw_buffer_ptr = ptr::null_mut();

        // SAFETY: The pointers are valid because they come from references, and

        // `AHardwareBuffer_allocate` doesn't retain them after it returns.

        let status = unsafe { ffi::AHardwareBuffer_allocate(&buffer_desc, &mut raw_buffer_ptr) };

        assert_eq!(status, 0);

        // SAFETY: The pointer must be valid because it was just allocated successfully, and we

        // don't use it after calling this.

        let buffer = unsafe { AHardwareBuffer::take_from_raw(raw_buffer_ptr as *mut c_void) };

        assert_eq!(buffer.width(), 1024);

    }