new branch to integrate BlockDevice, BlockCache

git-svn-id: https://profuse.googlecode.com/svn/branches/profuse_interim@334 aa027e90-d47c-11dd-86d7-074df07e0730

File/File.cpp

@@ -0,0 +1,128 @@
+#include <algorithm>
+#include <cerrno>
+
+#include <File/File.h>
+#include <ProFUSE/Exception.h>
+
+
+
+using ProFUSE::Exception;
+using ProFUSE::POSIXException;
+
+
+File::File()
+{
+    _fd = -1;
+}
+
+File::File(int fd)
+{
+    _fd = fd;
+}
+
+File::File(File& f)
+{
+    _fd = f._fd;
+    f._fd = -1;
+}
+
+File::File(const char *name, int flags, const std::nothrow_t&)
+{
+    _fd = ::open(name, flags);
+}
+
+
+File::File(const char *name, int flags, mode_t mode, const std::nothrow_t&)
+{
+    _fd = ::open(name, flags, mode);
+}
+
+File::File(const char *name, FileFlags flags, const std::nothrow_t&)
+{
+    _fd = ::open(name, flags == ReadOnly ? O_RDONLY : O_RDWR);
+}
+
+File::File(const char *name, int flags)
+{
+    #undef __METHOD__
+    #define __METHOD__ "File::File"
+
+    _fd = ::open(name, flags);
+    if (_fd < 0)
+        throw POSIXException( __METHOD__ ": open", errno);
+}
+
+File::File(const char *name, int flags, mode_t mode)
+{
+#undef __METHOD__
+#define __METHOD__ "File::File"
+    
+    _fd = ::open(name, flags, mode);
+    if (_fd < 0)
+        throw POSIXException( __METHOD__ ": open", errno);
+}
+
+
+File::File(const char *name, FileFlags flags)
+{
+#undef __METHOD__
+#define __METHOD__ "File::File"
+    
+    _fd = ::open(name, flags == ReadOnly ? O_RDONLY : O_RDWR);
+    if (_fd < 0)
+        throw POSIXException( __METHOD__ ": open", errno);    
+}
+
+
+File::~File()
+{
+    close();
+}
+
+int File::release()
+{
+    int tmp = _fd;
+    _fd = -1;
+    return tmp;
+}
+
+void File::close()
+{
+    #undef __METHOD__
+    #define __METHOD__ "File::close"
+
+    if (_fd >= 0)
+    {
+        ::close(_fd);
+        _fd = -1;
+    
+        // destructor shouldn't throw.
+        /*
+        if (::close(fd) != 0) 
+            throw POSIXException(__METHOD__ ": close", errno);
+         */
+    }
+}
+
+
+void File::adopt(File &f)
+{
+    if (&f == this) return;
+    
+    close();
+    _fd = f._fd;
+    f._fd = -1;
+}
+
+void File::adopt(int fd)
+{
+    if (fd == _fd) return;
+    close();
+    _fd = fd;
+}
+
+
+void File::swap(File &f)
+{
+    std::swap(_fd, f._fd);
+}