Move DeviceOpener class to a separate file.

It is used by several of the filesystems, so it seems a good idea to move it to the shared/ directory. UFS2, BFS, XFS, EXT2 and EXFAT are adjusted. Change-Id: I493e37a1e7d3ae24251469f82befd985a3c1dbdd Reviewed-on: https://review.haiku-os.org/c/haiku/+/2489 Reviewed-by: Adrien Destugues <[email protected]>
2020-05-10 08:29:31 +00:00
parent e9c3e80c58
commit d72239d23d
19 changed files with 368 additions and 867 deletions
@@ -0,0 +1,43 @@
+/*
+ * Copyright 2008-2010, Axel Dörfler, [email protected].
+ * All rights reserved. Distributed under the terms of the MIT License.
+ */
+
+#ifndef DEVICEOPENER_H
+#define DEVICEOPENER_H
+
+#include "system_dependencies.h"
+
+class DeviceOpener {
+	public:
+								DeviceOpener(int fd, int mode);
+								DeviceOpener(const char* device, int mode);
+								~DeviceOpener();
+
+				int				Open(const char* device, int mode);
+				int				Open(int fd, int mode);
+				void*			InitCache(off_t numBlocks, uint32 blockSize);
+				void			RemoveCache(bool allowWrites);
+
+				void			Keep();
+
+				int				Device() const { return fDevice; }
+				int				Mode() const { return fMode; }
+				bool			IsReadOnly() const {
+												return _IsReadOnly(fMode); }
+
+				status_t		GetSize(off_t* _size,
+										uint32* _blockSize = NULL);
+
+	private:
+			static	bool		_IsReadOnly(int mode)
+									{ return (mode & O_RWMASK) == O_RDONLY; }
+			static	bool		_IsReadWrite(int mode)
+									{ return (mode & O_RWMASK) == O_RDWR; }
+
+					int			fDevice;
+					int			fMode;
+					void*		fBlockCache;
+};
+
+#endif	// DEVICEOPENER_H