--- /dev/null
+/*
+* Copyright (C) 2016 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 EMUGL_COMMON_LOGGING_H_
+#define EMUGL_COMMON_LOGGING_H_
+
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wredundant-decls"
+
+namespace emugl {
+enum class LogLevel {
+ TRACE,
+ DEBUG,
+ INFO,
+ WARNING,
+ ERROR,
+ FATAL,
+};
+} // namespace emugl
+
+typedef void (*logger_t)(const emugl::LogLevel &level, const char* fmt, ...);
+extern logger_t emugl_logger;
+extern logger_t emugl_cxt_logger;
+void set_emugl_logger(logger_t f);
+void set_emugl_cxt_logger(logger_t f);
+
+#define GL_LOGGING 1
+
+#if GL_LOGGING
+
+#define GL_LOG(...) do { \
+ emugl_logger(__VA_ARGS__); \
+} while (0)
+
+#define GL_CXT_LOG(...) do { \
+ emugl_cxt_logger(__VA_ARGS__); \
+} while (0)
+
+#else
+#define GL_LOG(...) 0
+#endif
+
+#pragma GCC diagnostic pop
+
+#endif