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/******************************************************************************
* Project Persistency
* (c) copyright 2012
* Company XS Embedded GmbH
*****************************************************************************/
/******************************************************************************
* This Source Code Form is subject to the terms of the
* Mozilla Public License, v. 2.0. If a copy of the MPL was not distributed
* with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
******************************************************************************/
/**
* @file persistence_client_library_handle.c
* @ingroup Persistence client library handle
* @author Ingo Huerner
* @brief Implementation of the persistence client library handle
* Library provides an API to access persistent data
* @see
*/
#include "persistence_client_library_handle.h"
#include "persistence_client_library_custom_loader.h"
#include <pthread.h>
#include <stdlib.h>
/// handle index
static int gHandleIdx = 1;
static int gInitialized = 0;
/// open file descriptor handle array
int gOpenFdArray[MaxPersHandle] = {0};
/// persistence key handle array
PersistenceKeyHandle_s gKeyHandleArray[MaxPersHandle];
/// persistence key handle array
PersistenceFileHandle_s gFileHandleArray[MaxPersHandle];
/// free handle array
int gFreeHandleArray[MaxPersHandle] = {0};
int gFreeHandleIdxHead = 0;
pthread_mutex_t gMtx;
/// get persistence handle
int get_persistence_handle_idx(char* dbPath, char* key, PersistenceInfo_s* info)
{
int handle = 0;
if(gInitialized == 0)
{
gInitialized = 1;
pthread_mutex_init(&gMtx, 0);
}
if(pthread_mutex_lock(&gMtx) == 0)
{
if( PersistenceStorage_shared == info->configKey.storage
|| PersistenceStorage_local == info->configKey.storage)
{
if(gFreeHandleIdxHead > 0) // check if we have a free spot in the array before the current max
{
handle = gFreeHandleArray[--gFreeHandleIdxHead];
}
else
{
if(gHandleIdx < MaxPersHandle-1)
{
handle = gHandleIdx++; // no free spot before current max, increment handle index
}
else
{
handle = -1;
DLT_LOG(gDLTContext, DLT_LOG_ERROR, DLT_STRING("get_persistence_handle_idx => Reached maximum of open handles: "), DLT_INT(MaxPersHandle));
}
}
}
else if(PersistenceStorage_custom == info->configKey.storage)
{
int idx = custom_client_name_to_id(dbPath, 1);
char workaroundPath[128]; // workaround, because /sys/ can not be accessed on host!!!!
snprintf(workaroundPath, 128, "%s%s", "/Data", dbPath );
if( (idx < PersCustomLib_LastEntry) && (gPersCustomFuncs[idx].custom_plugin_handle_open != NULL) )
{
int flag = 0, mode = 0;
handle = gPersCustomFuncs[idx].custom_plugin_handle_open(workaroundPath, flag, mode);
}
else
{
handle = EPERS_NOPLUGINFUNCT;
}
}
pthread_mutex_unlock(&gMtx);
}
return handle;
}
/// close persistence handle
int set_persistence_handle_close_idx(int handle, char* dbPath, char* key, PersistenceInfo_s* info)
{
int rval = 0;
if(pthread_mutex_lock(&gMtx) == 0)
{
if( PersistenceStorage_shared == info->configKey.storage
|| PersistenceStorage_local == info->configKey.storage)
{
if(gFreeHandleIdxHead < MaxPersHandle)
{
gFreeHandleArray[gFreeHandleIdxHead++] = handle;
}
}
else if(PersistenceStorage_custom == gKeyHandleArray[handle].info.configKey.storage )
{
int idx = custom_client_name_to_id(gKeyHandleArray[handle].dbPath, 1);
if( (idx < PersCustomLib_LastEntry) && (gPersCustomFuncs[idx].custom_plugin_handle_close != NULL) )
{
rval = gPersCustomFuncs[idx].custom_plugin_handle_close(handle);
}
else
{
rval = EPERS_NOPLUGINFUNCT;
}
}
pthread_mutex_unlock(&gMtx);
}
}
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