lockfcntl.c
上传用户:s81996212
上传日期:2007-01-04
资源大小:722k
文件大小:1k
- /*
- ** Copyright 1998 - 1999 Double Precision, Inc. See COPYING for
- ** distribution information.
- */
- /* $Id: lockfcntl.c,v 1.3 1999/12/06 13:18:55 mrsam Exp $ */
- #if HAVE_CONFIG_H
- #include "config.h"
- #endif
- #include <sys/types.h>
- #if HAVE_FCNTL_H
- #include <fcntl.h>
- #endif
- #if HAVE_SYS_FCNTL_H
- #include <sys/fcntl.h>
- #endif
- #include "liblock.h"
- int ll_lockfd(int fd, int ltype, LL_OFFSET_TYPE start, LL_OFFSET_TYPE len)
- {
- #if HAS_FLOCK_T
- flock_t ft;
- #else
- struct flock ft;
- #endif
- ft.l_type=ltype & ll_unlock ? F_UNLCK:
- ltype & ll_writelock ? F_WRLCK:F_RDLCK;
- ft.l_whence=ltype & ll_whence_curpos ? 1:
- ltype & ll_whence_end ? 2:0;
- ft.l_start=start;
- ft.l_len=len;
- return (fcntl(fd, (ltype & ll_unlock) == 0 && (ltype & ll_wait)
- ? F_SETLKW:F_SETLK, &ft));
- }