ipsw: implemented file locking for on-demand downloading

1 files changed, 43 insertions, 0 deletions

diff --git a/src/locking.h b/src/locking.h
new file mode 100644
index 0000000..9bde00b
--- /dev/null
+++ b/src/locking.h
@@ -0,0 +1,43 @@
+/*
+ * locking.h
+ * locking extras header file
+ *
+ * Copyright (c) 2012 Nikias Bassen. All Rights Reserved.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+#ifndef LOCKING_H
+#define LOCKING_H
+#ifdef WIN32
+#include <windows.h>
+#else
+#include <stdio.h>
+#include <fcntl.h>
+#endif
+
+typedef struct {
+#ifdef WIN32
+	HANDLE fp;
+	OVERLAPPED ldata;
+#else
+	FILE* fp;
+	struct flock ldata;
+#endif	
+} lock_info_t;
+
+int lock_file(const char* filename, lock_info_t* lockp);
+int unlock_file(lock_info_t* lockp);
+
+#endif