rt-thread/include/rtservice.h

108 lines
2.1 KiB
C

/*
* File : rtservice.h
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006 - 2012, RT-Thread Development Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2006-03-16 Bernard the first version
* 2006-09-07 Bernard move the kservice APIs to rtthread.h
* 2007-06-27 Bernard fix the rt_list_remove bug
* 2012-03-22 Bernard rename kservice.h to rtservice.h
*/
#ifdef __cplusplus
extern "C" {
#endif
/**
* @addtogroup KernelService
*/
/*@{*/
/**
* @brief initialize a list object
*/
#define RT_LIST_OBJECT_INIT(object) { &(object), &(object) }
/**
* @brief initialize a list
*
* @param l list to be initialized
*/
rt_inline void rt_list_init(rt_list_t *l)
{
l->next = l->prev = l;
}
/**
* @brief insert a node after a list
*
* @param l list to insert it
* @param n new node to be inserted
*/
rt_inline void rt_list_insert_after(rt_list_t *l, rt_list_t *n)
{
l->next->prev = n;
n->next = l->next;
l->next = n;
n->prev = l;
}
/**
* @brief insert a node before a list
*
* @param n new node to be inserted
* @param l list to insert it
*/
rt_inline void rt_list_insert_before(rt_list_t *l, rt_list_t *n)
{
l->prev->next = n;
n->prev = l->prev;
l->prev = n;
n->next = l;
}
/**
* @brief remove node from list.
* @param n the node to remove from the list.
*/
rt_inline void rt_list_remove(rt_list_t *n)
{
n->next->prev = n->prev;
n->prev->next = n->next;
n->next = n->prev = n;
}
/**
* @brief tests whether a list is empty
* @param l the list to test.
*/
rt_inline int rt_list_isempty(const rt_list_t *l)
{
return l->next == l;
}
/**
* @brief get the struct for this entry
* @param node the entry point
* @param type the type of structure
* @param member the name of list in structure
*/
#define rt_list_entry(node, type, member) \
((type *)((char *)(node) - (unsigned long)(&((type *)0)->member)))
/*@}*/
#ifdef __cplusplus
}
#endif