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/**
@file fcntl_lock.c
@date 2009/9/30
@author À¯¿µÃ¢ frog@falinux.com FALinux.Co.,Ltd.
@brief fcntl_lock ÇÔ¼ö
Ver 0.1.0
@modify
@todo
@bug
@remark
@warning
*/
//----------------------------------------------------------------------------
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <ctype.h>
#include <stdarg.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <net/if.h>
#include <linux/sockios.h>
#include <linux/kdev_t.h>
#include <fcntl_lock.h>
int flock_create( char *key_file )
{
int fd;
fd = open( key_file, O_CREAT|O_RDWR );
if( fd < 0 ) return -1;
return fd;
}
int flock_free( int key_fd )
{
if( key_fd >= 0 ) close( key_fd );
}
int flock_lock( int key_fd )
{
struct flock lock;
if( key_fd < 0 ) return key_fd;
lock.l_type = F_WRLCK;
lock.l_start = 0;
lock.l_whence = SEEK_SET;
lock.l_len = 0;
return fcntl(key_fd, F_SETLKW, &lock);
}
int flock_unlock( int key_fd )
{
struct flock lock;
if( key_fd < 0 ) return key_fd;
lock.l_type = F_UNLCK;
lock.l_start = 0;
lock.l_whence = SEEK_SET;
lock.l_len = 0;
fcntl(key_fd, F_SETLK, &lock);
}
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