Move ScopedFd from libcore to libnativehelper (part 1)

Change-Id: I01941409001107ff1825a56919cdbea6fa017fa5

1 files changed, 46 insertions, 0 deletions

diff --git a/include/nativehelper/ScopedFd.h b/include/nativehelper/ScopedFd.h
new file mode 100644
index 0000000..d2b7935
--- /dev/null
+++ b/include/nativehelper/ScopedFd.h
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2009 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef SCOPED_FD_H_included
+#define SCOPED_FD_H_included
+
+#include <unistd.h>
+
+// A smart pointer that closes the given fd on going out of scope.
+// Use this when the fd is incidental to the purpose of your function,
+// but needs to be cleaned up on exit.
+class ScopedFd {
+public:
+    explicit ScopedFd(int fd) : fd(fd) {
+    }
+
+    ~ScopedFd() {
+        close(fd);
+    }
+
+    int get() const {
+        return fd;
+    }
+
+private:
+    int fd;
+
+    // Disallow copy and assignment.
+    ScopedFd(const ScopedFd&);
+    void operator=(const ScopedFd&);
+};
+
+#endif  // SCOPED_FD_H_included