1 files changed, 88 insertions, 0 deletions
diff --git a/libkdegames/highscore/kfilelock.cpp b/libkdegames/highscore/kfilelock.cpp
new file mode 100644
index 00000000..7dc83b96
--- /dev/null
+++ b/libkdegames/highscore/kfilelock.cpp
@@ -0,0 +1,88 @@
+/*
+    This file is part of the KDE games library
+    Copyright (C) 2003 Nicolas Hadacek <hadacek@kde.org>
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License version 2 as published by the Free Software Foundation.
+
+    This library 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
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public License
+    along with this library; see the file COPYING.LIB.  If not, write to
+    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+    Boston, MA 02110-1301, USA.
+*/
+
+#include "kfilelock.h"
+
+#include <unistd.h>
+#include <sys/file.h>
+#include <errno.h>
+
+#include <kdebug.h>
+
+
+KFileLock::KFileLock(int fd)
+    : _fd(fd), _locked(false)
+{}
+
+int KFileLock::lock()
+{
+    kdDebug(11002) << "lock fd=" << _fd << endl;
+#ifdef F_SETLK
+# ifndef SEEK_SET
+#  define SEEK_SET 0
+# endif
+    struct flock lock_data;
+    lock_data.l_type = F_WRLCK;
+    lock_data.l_whence = SEEK_SET;
+    lock_data.l_start = lock_data.l_len = 0;
+    if ( fcntl(_fd, F_SETLK, &lock_data)==-1 ) {
+        if ( errno==EAGAIN ) return -2;
+        return -1;
+    }
+#else
+# ifdef LOCK_EX
+    if ( flock (_fd, LOCK_EX|LOCK_NB)==-1 ) {
+        if ( errno==EWOULDBLOCK ) return -2;
+        return -1;
+    }
+# else
+    if ( lockf(_fd, F_TLOCK, 0)==-1 ) {
+        if ( errno==EACCES ) return -2;
+        return -1;
+    }
+# endif
+#endif
+    _locked = true;
+    return 0;
+}
+
+KFileLock::~KFileLock()
+{
+    unlock();
+}
+
+void KFileLock::unlock()
+{
+    if ( !_locked ) return;
+    kdDebug(11002) << "unlock" << endl;
+# ifdef F_SETLK
+    struct flock lock_data;
+    lock_data.l_type = F_UNLCK;
+    lock_data.l_whence = SEEK_SET;
+    lock_data.l_start = lock_data.l_len = 0;
+    (void)fcntl(_fd, F_SETLK, &lock_data);
+# else
+#  ifdef F_ULOCK
+    lockf(_fd, F_ULOCK, 0);
+#  else
+    flock(_fd, LOCK_UN);
+#  endif
+# endif
+    _locked = false;
+}