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[/] [openrisc/] [trunk/] [rtos/] [ecos-2.0/] [packages/] [compat/] [linux/] [v2_0/] [include/] [linux/] [list.h] - Rev 27
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/* * JFFS2 -- Journalling Flash File System, Version 2. * * Copyright (C) 2002 Red Hat, Inc. * * Created by Jonathan Larmour <jlarmour@redhat.com> * *=========================================================================== *####ECOSGPLCOPYRIGHTBEGIN#### * ------------------------------------------- * This file is part of eCos, the Embedded Configurable Operating System. * Copyright (C) 2003 Red Hat. * * eCos is free software; you can redistribute it and/or modify it under * the terms of the GNU General Public License as published by the Free * Software Foundation; either version 2 or (at your option) any later version. * * eCos is distributed in the hope that it will be useful, but WITHOUT ANY * WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * for more details. * * You should have received a copy of the GNU General Public License along * with eCos; if not, write to the Free Software Foundation, Inc., * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. * * As a special exception, if other files instantiate templates or use macros * or inline functions from this file, or you compile this file and link it * with other works to produce a work based on this file, this file does not * by itself cause the resulting work to be covered by the GNU General Public * License. However the source code for this file must still be made available * in accordance with section (3) of the GNU General Public License. * * This exception does not invalidate any other reasons why a work based on * this file might be covered by the GNU General Public License. * * Alternative licenses for eCos may be arranged by contacting Red Hat, Inc. * at http://sources.redhat.com/ecos/ecos-license/ * ------------------------------------------- *####ECOSGPLCOPYRIGHTEND#### *=========================================================================== * */ #ifndef CYGONCE_FS_JFFS2_LIST_H #define CYGONCE_FS_JFFS2_LIST_H /* -----------------------------------------------------------------------*/ /* Doubly linked list implementation to replace the GPL'd one used in the Linux kernel. */ #include <stddef.h> #include <cyg/infra/cyg_type.h> /* TYPES */ struct list_head { struct list_head *next; struct list_head *prev; }; /* MACROS */ #define INIT_LIST_HEAD( _list_ ) \ CYG_MACRO_START \ (_list_)->next = (_list_)->prev = (_list_); \ CYG_MACRO_END /* FUNCTIONS */ /* Insert an entry _after_ the specified entry */ static __inline__ void list_add( struct list_head *newent, struct list_head *afterthisent ) { struct list_head *next = afterthisent->next; newent->next = next; newent->prev = afterthisent; afterthisent->next = newent; next->prev = newent; } /* list_add() */ /* Insert an entry _before_ the specified entry */ static __inline__ void list_add_tail( struct list_head *newent, struct list_head *beforethisent ) { struct list_head *prev = beforethisent->prev; newent->prev = prev; newent->next = beforethisent; beforethisent->prev = newent; prev->next = newent; } /* list_add_tail() */ /* Delete the specified entry */ static __inline__ void list_del( struct list_head *ent ) { ent->prev->next = ent->next; ent->next->prev = ent->prev; } /* list_del() */ /* Is this list empty? */ static __inline__ int list_empty( struct list_head *list ) { return ( list->next == list ); } /* list_empty() */ /* list_entry - Assuming you have a struct of type _type_ that contains a list which has the name _member_ in that struct type, then given the address of that list in the struct, _list_, this returns the address of the container structure */ #define list_entry( _list_, _type_, _member_ ) \ ((_type_ *)((char *)(_list_)-(char *)(offsetof(_type_,_member_)))) /* list_for_each - using _ent_, iterate through list _list_ */ #define list_for_each( _ent_, _list_ ) \ for ( (_ent_) = (_list_)->next; \ (_ent_) != (_list_); \ (_ent_) = (_ent_)->next ) /* -----------------------------------------------------------------------*/ #endif /* #ifndef CYGONCE_FS_JFFS2_LIST_H */ /* EOF list.h */
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