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pal_init.c
00001 /* 00002 * Copyright (c) 2016 ARM Limited. All rights reserved. 00003 * SPDX-License-Identifier: Apache-2.0 00004 * Licensed under the Apache License, Version 2.0 (the License); you may 00005 * not use this file except in compliance with the License. 00006 * You may obtain a copy of the License at 00007 * 00008 * http://www.apache.org/licenses/LICENSE-2.0 00009 * 00010 * Unless required by applicable law or agreed to in writing, software 00011 * distributed under the License is distributed on an AS IS BASIS, WITHOUT 00012 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 00013 * See the License for the specific language governing permissions and 00014 * limitations under the License. 00015 */ 00016 00017 00018 #include "pal.h" 00019 #include "pal_plat_rtos.h" 00020 #include "pal_plat_network.h" 00021 #include "pal_macros.h" 00022 00023 //this variable must be a int32_t for using atomic increment 00024 static int32_t g_palIntialized = 0; 00025 00026 00027 palStatus_t pal_init() 00028 { 00029 00030 palStatus_t status = PAL_SUCCESS; 00031 int32_t currentInitValue; 00032 // get the return value of g_palIntialized+1 to save it locally 00033 currentInitValue = pal_osAtomicIncrement(&g_palIntialized,1); 00034 // if increased for the 1st time 00035 if (1 == currentInitValue) 00036 { 00037 DEBUG_PRINT("Init for the 1st time, initializing the modules\r\n"); 00038 status = pal_plat_RTOSInitialize(NULL); 00039 if (PAL_SUCCESS == status) 00040 { 00041 00042 status = pal_plat_socketsInit(NULL); 00043 if (PAL_SUCCESS != status) 00044 { 00045 DEBUG_PRINT("init of network module has failed with status %d\r\n",status); 00046 } 00047 } 00048 else 00049 { 00050 DEBUG_PRINT("init of RTOS module has failed with status %d\r\n",status); 00051 } 00052 } 00053 // if failed decrees the value of g_palIntialized 00054 if (PAL_SUCCESS != status) 00055 { 00056 pal_plat_socketsTerminate(NULL); 00057 pal_plat_RTOSDestroy(); 00058 pal_osAtomicIncrement(&g_palIntialized, -1); 00059 } 00060 return status; 00061 } 00062 00063 00064 void pal_destroy() 00065 { 00066 int32_t currentInitValue; 00067 // get the current value of g_palIntialized locally 00068 currentInitValue = pal_osAtomicIncrement(&g_palIntialized, -1); 00069 if (0 == currentInitValue) 00070 { 00071 DEBUG_PRINT("Destroying modules\r\n"); 00072 pal_plat_RTOSDestroy(); 00073 pal_plat_socketsTerminate(NULL); 00074 } 00075 }
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