refactor[osal/linux/os_log]: Use C constructor.

Change-Id: I178b570db0131965deecbcf536ab8f680a35c46f
Signed-off-by: Chandler Chen <chandler.chen@rock-chips.com>
Signed-off-by: Hongjin Li <vic.hong@rock-chips.com>

osal/CMakeLists.txt

@@ -55,7 +55,7 @@ add_library(osal OBJECT
     android/os_log.c
     linux/os_mem.c
     linux/os_env.c
-    linux/os_log.cpp
+    linux/os_log.c
     windows/os_mem.c
     windows/os_env.c
     windows/os_log.c

osal/linux/os_log.c

@@ -1,43 +1,23 @@
+/* SPDX-License-Identifier: Apache-2.0 OR MIT */
 /*
- * Copyright 2015 Rockchip Electronics Co. LTD
- *
- * 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.
+ * Copyright (c) 2015 Rockchip Electronics Co., Ltd.
  */
 
 #if defined(linux) && !defined(__ANDROID__)
+
+#define MODULE_TAG "os_log"
+
 #include <stdio.h>
 #include <stdarg.h>
 #include <syslog.h>
 
 #include "os_log.h"
 #include "os_env.h"
+#include "mpp_singleton.h"
 
 #define LINE_SZ 1024
 
-class SyslogWrapper
-{
-private:
-    // avoid any unwanted function
-    SyslogWrapper(const SyslogWrapper &);
-    SyslogWrapper &operator=(const SyslogWrapper &);
-public:
-    SyslogWrapper();
-    ~SyslogWrapper();
-};
-
-static SyslogWrapper syslog_wrapper;
-
-SyslogWrapper::SyslogWrapper()
+void syslog_wrapper_init()
 {
     int option = LOG_PID;
     RK_U32 syslog_perror = 1;
@@ -54,7 +34,7 @@ SyslogWrapper::SyslogWrapper()
     openlog("mpp", option, LOG_USER);
 }
 
-SyslogWrapper::~SyslogWrapper()
+void syslog_wrapper_deinit()
 {
     closelog();
 }
@@ -101,4 +81,6 @@ void os_log_fatal(const char* tag, const char* msg, va_list list)
     vsyslog(LOG_CRIT, line, list);
 }
 
+MPP_SINGLETON(MPP_SGLN_OS_LOG, os_log, syslog_wrapper_init, syslog_wrapper_deinit)
+
 #endif