ScopedHandle
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class ScopedHandle {
public:
ScopedHandle() : handle_(NULL) {
}
explicit ScopedHandle(HANDLE h) : handle_(NULL) {
Set(h);
}
~ScopedHandle() {
Close();
}
// Use this instead of comparing to INVALID_HANDLE_VALUE to pick up our NULL
// usage for errors.
bool IsValid() const {
return handle_ != NULL;
}
void Set(HANDLE new_handle) {
Close();
// Windows is inconsistent about invalid handles, so we always use NULL
if (new_handle != INVALID_HANDLE_VALUE)
handle_ = new_handle;
}
HANDLE Get() {
return handle_;
}
operator HANDLE() { return handle_; }
HANDLE Take() {
// transfers ownership away from this object
HANDLE h = handle_;
handle_ = NULL;
return h;
}
void Close() {
if (handle_) {
if (!::CloseHandle(handle_)) {
NOTREACHED();
}
handle_ = NULL;
}
}
private:
HANDLE handle_;
DISALLOW_EVIL_CONSTRUCTORS(ScopedHandle);
};
