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glibc  2.9
dirstream.h
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00001 /* Copyright (C) 1993, 1995, 1996, 2007 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003 
00004    The GNU C Library is free software; you can redistribute it and/or
00005    modify it under the terms of the GNU Lesser General Public
00006    License as published by the Free Software Foundation; either
00007    version 2.1 of the License, or (at your option) any later version.
00008 
00009    The GNU C Library is distributed in the hope that it will be useful,
00010    but WITHOUT ANY WARRANTY; without even the implied warranty of
00011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012    Lesser General Public License for more details.
00013 
00014    You should have received a copy of the GNU Lesser General Public
00015    License along with the GNU C Library; if not, write to the Free
00016    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00017    02111-1307 USA.  */
00018 
00019 #ifndef       _DIRSTREAM_H
00020 #define       _DIRSTREAM_H  1
00021 
00022 #include <sys/types.h>
00023 
00024 #include <bits/libc-lock.h>
00025 
00026 /* Directory stream type.
00027 
00028    The miscellaneous Unix `readdir' implementations read directory data
00029    into a buffer and return `struct dirent *' pointers into it.  */
00030 
00031 struct __dirstream
00032   {
00033     int fd;                 /* File descriptor.  */
00034 
00035     __libc_lock_define (, lock) /* Mutex lock for this structure.  */
00036 
00037     size_t allocation;             /* Space allocated for the block.  */
00038     size_t size;            /* Total valid data in the block.  */
00039     size_t offset;          /* Current offset into the block.  */
00040 
00041     off_t filepos;          /* Position of next entry to read.  */
00042 
00043     /* Directory block.  */
00044     char data[0] __attribute__ ((aligned (__alignof__ (void*))));
00045   };
00046 
00047 #define _DIR_dirfd(dirp)    ((dirp)->fd)
00048 
00049 #endif /* dirstream.h */