/* scoped_fd, automatically close a file descriptor
- Copyright (C) 2018 Free Software Foundation, Inc.
+ Copyright (C) 2018-2019 Free Software Foundation, Inc.
This file is part of GDB.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
-#ifndef SCOPED_FD_H
-#define SCOPED_FD_H
+#ifndef COMMON_SCOPED_FD_H
+#define COMMON_SCOPED_FD_H
#include <unistd.h>
+#include "filestuff.h"
/* A smart-pointer-like class to automatically close a file descriptor. */
{
public:
explicit scoped_fd (int fd = -1) noexcept : m_fd (fd) {}
+
+ scoped_fd (scoped_fd &&other)
+ : m_fd (other.m_fd)
+ {
+ other.m_fd = -1;
+ }
+
~scoped_fd ()
{
if (m_fd >= 0)
close (m_fd);
}
+ scoped_fd &operator= (scoped_fd &&other)
+ {
+ if (m_fd != other.m_fd)
+ {
+ if (m_fd >= 0)
+ close (m_fd);
+ m_fd = other.m_fd;
+ other.m_fd = -1;
+ }
+ return *this;
+ }
+
DISABLE_COPY_AND_ASSIGN (scoped_fd);
int release () noexcept
return fd;
}
+ /* Like release, but return a gdb_file_up that owns the file
+ descriptor. On success, this scoped_fd will be released. On
+ failure, return NULL and leave this scoped_fd in possession of
+ the fd. */
+ gdb_file_up to_file (const char *mode) noexcept
+ {
+ gdb_file_up result (fdopen (m_fd, mode));
+ if (result != nullptr)
+ m_fd = -1;
+ return result;
+ }
+
int get () const noexcept
{
return m_fd;
int m_fd;
};
-#endif /* SCOPED_FD_H */
+#endif /* COMMON_SCOPED_FD_H */