Changeset 5167 for trunk/libtransmission/platform.c

Timestamp:

Feb 28, 2008, 7:06:23 PM (13 years ago)

Author:

charles

Message:

add win32/posix wrapper function tr_lockfile() to libT and use it in daemon/gtk.

File:

• trunk/libtransmission/platform.c (modified) (1 diff)

trunk/libtransmission/platform.c

@@ -450 +450 @@
     return buf;
 }
+
+/***
+****
+***/
+
+int
+tr_lockfile( const char * filename )
+{
+    int ret;
+
+#ifdef WIN32
+
+    HANDLE file = CreateFile( filename,
+                              GENERIC_READ|GENERIC_WRITE,
+                              FILE_SHARE_READ|FILE_SHARE_WRITE,
+                              NULL,
+                              OPEN_ALWAYS,
+                              FILE_ATTRIBUTE_NORMAL,
+                              NULL );
+    if( file == INVALID_HANDLE_VALUE )
+        ret = TR_LOCKFILE_EOPEN;
+    else if( !LockFile( file, 0, 0, 1, 1 ) )
+        ret = TR_LOCKFILE_ELOCK;
+    else
+        ret = TR_LOCKFILE_SUCCESS;
+
+#else
+
+    int fd = open( filename, O_RDWR | O_CREAT, 0666 );
+    if( fd < 0 )
+        ret = TR_LOCKFILE_EOPEN;
+    else {
+        struct flock lk;
+        memset( &lk, 0,  sizeof( lk ) );
+        lk.l_start = 0;
+        lk.l_len = 0;
+        lk.l_type = F_WRLCK;
+        lk.l_whence = SEEK_SET;
+        if( -1 == fcntl( fd, F_SETLK, &lk ) )
+            ret = TR_LOCKFILE_ELOCK;
+        else
+            ret = TR_LOCKFILE_SUCCESS;
+    }
+
+#endif
+
+    return ret;
+}