// SPDX-License-Identifier: CDDL-1.0
/*
 * This file and its contents are supplied under the terms of the
 * Common Development and Distribution License ("CDDL"), version 1.0.
 * You may only use this file in accordance with the terms of version
 * 1.0 of the CDDL.
 *
 * A full copy of the text of the CDDL should have accompanied this
 * source.  A copy of the CDDL is also available via the Internet at
 * https://opensource.org/license/CDDL-1.0.
 */
/*
 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
 * Copyright (c) 2012, 2018 by Delphix. All rights reserved.
 * Copyright (c) 2016 Actifio, Inc. All rights reserved.
 * Copyright (c) 2025, Klara, Inc.
 */

#include <assert.h>
#include <pthread.h>
#include <stddef.h>
#include <sys/procfs_list.h>
#include <sys/mutex.h>
#include <sys/list.h>

/*
 * =========================================================================
 * procfs list
 * =========================================================================
 */

void
seq_printf(struct seq_file *m, const char *fmt, ...)
{
	(void) m, (void) fmt;
}

void
procfs_list_install(const char *module,
    const char *submodule,
    const char *name,
    mode_t mode,
    procfs_list_t *procfs_list,
    int (*show)(struct seq_file *f, void *p),
    int (*show_header)(struct seq_file *f),
    int (*clear)(procfs_list_t *procfs_list),
    size_t procfs_list_node_off)
{
	(void) module, (void) submodule, (void) name, (void) mode, (void) show,
	    (void) show_header, (void) clear;
	mutex_init(&procfs_list->pl_lock, NULL, MUTEX_DEFAULT, NULL);
	list_create(&procfs_list->pl_list,
	    procfs_list_node_off + sizeof (procfs_list_node_t),
	    procfs_list_node_off + offsetof(procfs_list_node_t, pln_link));
	procfs_list->pl_next_id = 1;
	procfs_list->pl_node_offset = procfs_list_node_off;
}

void
procfs_list_uninstall(procfs_list_t *procfs_list)
{
	(void) procfs_list;
}

void
procfs_list_destroy(procfs_list_t *procfs_list)
{
	ASSERT(list_is_empty(&procfs_list->pl_list));
	list_destroy(&procfs_list->pl_list);
	mutex_destroy(&procfs_list->pl_lock);
}

#define	NODE_ID(procfs_list, obj) \
		(((procfs_list_node_t *)(((char *)obj) + \
		(procfs_list)->pl_node_offset))->pln_id)

void
procfs_list_add(procfs_list_t *procfs_list, void *p)
{
	ASSERT(MUTEX_HELD(&procfs_list->pl_lock));
	NODE_ID(procfs_list, p) = procfs_list->pl_next_id++;
	list_insert_tail(&procfs_list->pl_list, p);
}