Optimize file log.

src/base/io/log/FileLogWriter.h

@@ -0,0 +1,48 @@
+/* XMRig
+ * Copyright 2018-2020 SChernykh   <https://github.com/SChernykh>
+ * Copyright 2016-2020 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *   GNU General Public License for more details.
+ *
+ *   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 XMRIG_FILELOGWRITER_H
+#define XMRIG_FILELOGWRITER_H
+
+
+#include <cstddef>
+
+
+namespace xmrig {
+
+
+class FileLogWriter
+{
+public:
+    FileLogWriter() = default;
+    FileLogWriter(const char *fileName) { open(fileName); }
+
+    inline bool isOpen() const  { return m_file >= 0; }
+
+    bool open(const char *fileName);
+    bool write(const char *data, size_t size);
+
+private:
+    int m_file = -1;
+};
+
+
+} /* namespace xmrig */
+
+
+#endif /* XMRIG_FILELOGWRITER_H */