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Diffstat (limited to 'include/libcamera/base/unique_fd.h')
-rw-r--r--include/libcamera/base/unique_fd.h69
1 files changed, 69 insertions, 0 deletions
diff --git a/include/libcamera/base/unique_fd.h b/include/libcamera/base/unique_fd.h
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+++ b/include/libcamera/base/unique_fd.h
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+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2021, Google Inc.
+ *
+ * unique_fd.h - File descriptor wrapper that owns a file descriptor.
+ */
+
+#pragma once
+
+#include <utility>
+
+#include <libcamera/base/class.h>
+#include <libcamera/base/compiler.h>
+
+namespace libcamera {
+
+class UniqueFD final
+{
+public:
+ UniqueFD()
+ : fd_(-1)
+ {
+ }
+
+ explicit UniqueFD(int fd)
+ : fd_(fd)
+ {
+ }
+
+ UniqueFD(UniqueFD &&other)
+ : fd_(other.release())
+ {
+ }
+
+ ~UniqueFD()
+ {
+ reset();
+ }
+
+ UniqueFD &operator=(UniqueFD &&other)
+ {
+ reset(other.release());
+ return *this;
+ }
+
+ __nodiscard int release()
+ {
+ int fd = fd_;
+ fd_ = -1;
+ return fd;
+ }
+
+ void reset(int fd = -1);
+
+ void swap(UniqueFD &other)
+ {
+ std::swap(fd_, other.fd_);
+ }
+
+ int get() const { return fd_; }
+ bool isValid() const { return fd_ >= 0; }
+
+private:
+ LIBCAMERA_DISABLE_COPY(UniqueFD)
+
+ int fd_;
+};
+
+} /* namespace libcamera */