mbed_error_hist.c

00001 /* mbed Microcontroller Library
00002  * Copyright (c) 2006-2013 ARM Limited
00003  *
00004  * Licensed under the Apache License, Version 2.0 (the "License");
00005  * you may 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,
00012  * WITHOUT 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 #include <stdlib.h>
00017 #include <string.h>
00018 #include <stdarg.h>
00019 #include "device.h"
00020 #include "platform/mbed_error.h"
00021 #include "platform/mbed_toolchain.h"
00022 #include "platform/mbed_critical.h"
00023 #include "platform/mbed_interface.h"
00024 
00025 #ifndef MBED_CONF_ERROR_HIST_DISABLED
00026 #include "platform/mbed_error_hist.h"
00027 
00028 static mbed_error_ctx mbed_error_ctx_log[MBED_CONF_ERROR_HIST_SIZE] = {0};
00029 static int error_log_count = -1;
00030 
00031 mbed_error_status_t mbed_error_hist_put(mbed_error_ctx *error_ctx)
00032 {
00033     //Return error if error_ctx is NULL
00034     if(NULL == error_ctx) {
00035         return MBED_ERROR_INVALID_ARGUMENT;
00036     }
00037     
00038     core_util_critical_section_enter();
00039     error_log_count++;
00040     memcpy(&mbed_error_ctx_log[error_log_count % MBED_CONF_ERROR_HIST_SIZE], error_ctx, sizeof(mbed_error_ctx) );
00041     core_util_critical_section_exit(); 
00042     
00043     return MBED_SUCCESS;
00044 }
00045 
00046 mbed_error_status_t mbed_error_hist_get(int index, mbed_error_ctx *error_ctx)
00047 {
00048     //Return error if index is more than max log size
00049     if(index >= MBED_CONF_ERROR_HIST_SIZE) {
00050         return MBED_ERROR_INVALID_ARGUMENT;
00051     }
00052     
00053     core_util_critical_section_enter();
00054     //calculate the index where we want to pick the ctx
00055     if(error_log_count >= MBED_CONF_ERROR_HIST_SIZE) {
00056         index = (error_log_count + index + 1) % MBED_CONF_ERROR_HIST_SIZE;
00057     }
00058     core_util_critical_section_exit(); 
00059     memcpy(error_ctx, &mbed_error_ctx_log[index % MBED_CONF_ERROR_HIST_SIZE], sizeof(mbed_error_ctx) );
00060         
00061     return MBED_SUCCESS;
00062 }
00063 
00064 mbed_error_ctx *mbed_error_hist_get_entry(void)
00065 {
00066     core_util_critical_section_enter();
00067     error_log_count++;
00068     mbed_error_ctx *ctx = &mbed_error_ctx_log[error_log_count % MBED_CONF_ERROR_HIST_SIZE];
00069     core_util_critical_section_exit(); 
00070     
00071     return ctx;
00072 }
00073 
00074 mbed_error_status_t mbed_error_hist_get_last_error(mbed_error_ctx *error_ctx)
00075 {
00076     if(-1 == error_log_count) {
00077         return MBED_ERROR_ITEM_NOT_FOUND;
00078     }
00079     core_util_critical_section_enter();
00080     memcpy(error_ctx, &mbed_error_ctx_log[error_log_count % MBED_CONF_ERROR_HIST_SIZE], sizeof(mbed_error_ctx) );
00081     core_util_critical_section_exit(); 
00082     
00083     return MBED_SUCCESS;
00084 }
00085 
00086 int mbed_error_hist_get_count()
00087 {
00088     return (error_log_count >= MBED_CONF_ERROR_HIST_SIZE? MBED_CONF_ERROR_HIST_SIZE:error_log_count+1);
00089 }
00090 
00091 mbed_error_status_t mbed_error_hist_reset()
00092 {
00093     core_util_critical_section_enter();
00094     error_log_count = -1;
00095     core_util_critical_section_exit(); 
00096     
00097     return MBED_SUCCESS;
00098 }
00099 
00100 #endif