Ram Gandikota / Mbed OS ABCD

A metronome using the FRDM K64F board

pal/Source/PAL-Impl/pal_init.c@0:a7a43371b306, 2017-05-14 (annotated)

Committer:
ram54288
Date:
Sun May 14 18:40:18 2017 +0000
Revision:
0:a7a43371b306
Initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ram54288 0:a7a43371b306 1 /*
ram54288 0:a7a43371b306 2 * Copyright (c) 2016 ARM Limited. All rights reserved.
ram54288 0:a7a43371b306 3 * SPDX-License-Identifier: Apache-2.0
ram54288 0:a7a43371b306 4 * Licensed under the Apache License, Version 2.0 (the License); you may
ram54288 0:a7a43371b306 5 * not use this file except in compliance with the License.
ram54288 0:a7a43371b306 6 * You may obtain a copy of the License at
ram54288 0:a7a43371b306 7 *
ram54288 0:a7a43371b306 8 * http://www.apache.org/licenses/LICENSE-2.0
ram54288 0:a7a43371b306 9 *
ram54288 0:a7a43371b306 10 * Unless required by applicable law or agreed to in writing, software
ram54288 0:a7a43371b306 11 * distributed under the License is distributed on an AS IS BASIS, WITHOUT
ram54288 0:a7a43371b306 12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
ram54288 0:a7a43371b306 13 * See the License for the specific language governing permissions and
ram54288 0:a7a43371b306 14 * limitations under the License.
ram54288 0:a7a43371b306 15 */
ram54288 0:a7a43371b306 16
ram54288 0:a7a43371b306 17
ram54288 0:a7a43371b306 18 #include "pal.h"
ram54288 0:a7a43371b306 19 #include "pal_plat_rtos.h"
ram54288 0:a7a43371b306 20 #include "pal_plat_network.h"
ram54288 0:a7a43371b306 21 #include "pal_macros.h"
ram54288 0:a7a43371b306 22
ram54288 0:a7a43371b306 23 //this variable must be a int32_t for using atomic increment
ram54288 0:a7a43371b306 24 static int32_t g_palIntialized = 0;
ram54288 0:a7a43371b306 25
ram54288 0:a7a43371b306 26
ram54288 0:a7a43371b306 27 palStatus_t pal_init()
ram54288 0:a7a43371b306 28 {
ram54288 0:a7a43371b306 29
ram54288 0:a7a43371b306 30 palStatus_t status = PAL_SUCCESS;
ram54288 0:a7a43371b306 31 int32_t currentInitValue;
ram54288 0:a7a43371b306 32 // get the return value of g_palIntialized+1 to save it locally
ram54288 0:a7a43371b306 33 currentInitValue = pal_osAtomicIncrement(&g_palIntialized,1);
ram54288 0:a7a43371b306 34 // if increased for the 1st time
ram54288 0:a7a43371b306 35 if (1 == currentInitValue)
ram54288 0:a7a43371b306 36 {
ram54288 0:a7a43371b306 37 DEBUG_PRINT("Init for the 1st time, initializing the modules\r\n");
ram54288 0:a7a43371b306 38 status = pal_plat_RTOSInitialize(NULL);
ram54288 0:a7a43371b306 39 if (PAL_SUCCESS == status)
ram54288 0:a7a43371b306 40 {
ram54288 0:a7a43371b306 41
ram54288 0:a7a43371b306 42 status = pal_plat_socketsInit(NULL);
ram54288 0:a7a43371b306 43 if (PAL_SUCCESS != status)
ram54288 0:a7a43371b306 44 {
ram54288 0:a7a43371b306 45 DEBUG_PRINT("init of network module has failed with status %d\r\n",status);
ram54288 0:a7a43371b306 46 }
ram54288 0:a7a43371b306 47 }
ram54288 0:a7a43371b306 48 else
ram54288 0:a7a43371b306 49 {
ram54288 0:a7a43371b306 50 DEBUG_PRINT("init of RTOS module has failed with status %d\r\n",status);
ram54288 0:a7a43371b306 51 }
ram54288 0:a7a43371b306 52 }
ram54288 0:a7a43371b306 53 // if failed decrees the value of g_palIntialized
ram54288 0:a7a43371b306 54 if (PAL_SUCCESS != status)
ram54288 0:a7a43371b306 55 {
ram54288 0:a7a43371b306 56 pal_plat_socketsTerminate(NULL);
ram54288 0:a7a43371b306 57 pal_plat_RTOSDestroy();
ram54288 0:a7a43371b306 58 pal_osAtomicIncrement(&g_palIntialized, -1);
ram54288 0:a7a43371b306 59 }
ram54288 0:a7a43371b306 60 return status;
ram54288 0:a7a43371b306 61 }
ram54288 0:a7a43371b306 62
ram54288 0:a7a43371b306 63
ram54288 0:a7a43371b306 64 void pal_destroy()
ram54288 0:a7a43371b306 65 {
ram54288 0:a7a43371b306 66 int32_t currentInitValue;
ram54288 0:a7a43371b306 67 // get the current value of g_palIntialized locally
ram54288 0:a7a43371b306 68 currentInitValue = pal_osAtomicIncrement(&g_palIntialized, -1);
ram54288 0:a7a43371b306 69 if (0 == currentInitValue)
ram54288 0:a7a43371b306 70 {
ram54288 0:a7a43371b306 71 DEBUG_PRINT("Destroying modules\r\n");
ram54288 0:a7a43371b306 72 pal_plat_RTOSDestroy();
ram54288 0:a7a43371b306 73 pal_plat_socketsTerminate(NULL);
ram54288 0:a7a43371b306 74 }
ram54288 0:a7a43371b306 75 }