Function sam_hc_callback_register

lib/sam.c:1462–1545

}

cs_error_t sam_hc_callback_register (sam_hc_callback_t cb)
{
	cs_error_t error = CS_OK;
	pthread_attr_t thread_attr;
	int pipe_error;
	int pipe_fd[2];

	if (sam_internal_data.internal_status != SAM_INTERNAL_STATUS_REGISTERED) {
		return (CS_ERR_BAD_HANDLE);
	}

	if (sam_internal_data.time_interval == 0) {
		return (CS_ERR_INVALID_PARAM);
	}

	if (sam_internal_data.cb_registered) {
		sam_internal_data.hc_callback = cb;

		return (CS_OK);
	}

	/*
	 * We know, this is first registration
	 */

	if (cb == NULL) {
		return (CS_ERR_INVALID_PARAM);
	}

	pipe_error = pipe (pipe_fd);

	if (pipe_error != 0) {
		/*
		 *  Pipe creation error
		 */
		error = CS_ERR_LIBRARY;
		goto error_exit;
	}

	sam_internal_data.cb_rpipe_fd = pipe_fd[0];
	sam_internal_data.cb_wpipe_fd = pipe_fd[1];

	/*
	 * Create thread attributes
	 */
	error = pthread_attr_init (&thread_attr);
	if (error != 0) {
		error = CS_ERR_LIBRARY;
		goto error_close_fd_exit;
	}


	pthread_attr_setdetachstate (&thread_attr, PTHREAD_CREATE_DETACHED);
	pthread_attr_setstacksize (&thread_attr, 32768);

	/*
	 * Create thread
	 */