Function cmd_register

kernel/generic/src/console/kconsole.c:113–155

Register kconsole command. * * @param cmd Structure describing the command. * * @return False on failure, true on success. * */

 *
 */
bool cmd_register(cmd_info_t *cmd)
{
	spinlock_lock(&cmd_lock);

	/*
	 * Make sure the command is not already listed.
	 */
	list_foreach(cmd_list, link, cmd_info_t, hlp) {
		if (hlp == cmd) {
			/* The command is already there. */
			spinlock_unlock(&cmd_lock);
			return false;
		}

		/* Avoid deadlock. */
		if (hlp < cmd) {
			spinlock_lock(&hlp->lock);
			spinlock_lock(&cmd->lock);
		} else {
			spinlock_lock(&cmd->lock);
			spinlock_lock(&hlp->lock);
		}

		if (str_cmp(hlp->name, cmd->name) == 0) {
			/* The command is already there. */
			spinlock_unlock(&hlp->lock);
			spinlock_unlock(&cmd->lock);
			spinlock_unlock(&cmd_lock);
			return false;
		}

		spinlock_unlock(&hlp->lock);
		spinlock_unlock(&cmd->lock);
	}

	/*
	 * Now the command can be added.
	 */
	list_append(&cmd->link, &cmd_list);

	spinlock_unlock(&cmd_lock);
	return true;
}

/** Print count times a character */
_NO_TRACE static void print_cc(char32_t ch, size_t count)