*
*/
+#ifndef LTTNG_FILE_DESCRIPTOR_HPP
+#define LTTNG_FILE_DESCRIPTOR_HPP
+
#include <common/error.hpp>
#include <common/format.hpp>
/*
* RAII wrapper around a UNIX file descriptor. A file_descriptor's underlying
- * file descriptor
+ * file descriptor.
*/
class file_descriptor {
public:
- explicit file_descriptor(int raw_fd) noexcept : _raw_fd{raw_fd}
+ file_descriptor()
+ {
+ }
+
+ explicit file_descriptor(int raw_fd) noexcept : _raw_fd{ raw_fd }
{
LTTNG_ASSERT(_is_valid_fd(_raw_fd));
}
file_descriptor(const file_descriptor&) = delete;
+ file_descriptor& operator=(const file_descriptor&) = delete;
+ file_descriptor& operator=(file_descriptor&& other)
+ {
+ _cleanup();
+ std::swap(_raw_fd, other._raw_fd);
+ return *this;
+ }
- file_descriptor(file_descriptor&& other) : _raw_fd{-1}
+ file_descriptor(file_descriptor&& other) noexcept
{
- LTTNG_ASSERT(_is_valid_fd(_raw_fd));
std::swap(_raw_fd, other._raw_fd);
}
~file_descriptor()
{
- if (!_is_valid_fd(_raw_fd)) {
- return;
- }
-
- const auto ret = ::close(_raw_fd);
- if (ret) {
- PERROR("%s",
- fmt::format("Failed to close file descriptor: fd = {}",
- _raw_fd)
- .c_str());
- }
+ _cleanup();
}
int fd() const noexcept
return fd >= 0;
}
- int _raw_fd;
+ void _cleanup()
+ {
+ if (!_is_valid_fd(_raw_fd)) {
+ return;
+ }
+
+ const auto ret = ::close(_raw_fd);
+
+ _raw_fd = -1;
+ if (ret) {
+ PERROR("Failed to close file descriptor: fd=%i", _raw_fd);
+ }
+ }
+
+ int _raw_fd = -1;
};
-} /* namespace lttng */
\ No newline at end of file
+} /* namespace lttng */
+
+#endif /* LTTNG_FILE_DESCRIPTOR_HPP */