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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.c
* @ingroup Persistence client library
* @author Ingo Huerner
* @brief Implementation of the persistence client library.
* Library provides an API to access persistent data
* @see
*/
#include "persistence_client_library_lc_interface.h"
#include "persistence_client_library_pas_interface.h"
#include "persistence_client_library_dbus_service.h"
#include "persistence_client_library_handle.h"
#include "persistence_client_library_custom_loader.h"
#include "persistence_client_library.h"
#include <string.h>
#include <errno.h>
#include <stdlib.h>
#include <dlfcn.h>
#include <dlt/dlt.h>
#include <dlt/dlt_common.h>
#include <dbus/dbus.h>
#define USE_DBUS 1
/// debug log and trace (DLT) setup
DLT_DECLARE_CONTEXT(gDLTContext);
static int gShutdownMode = 0;
/// loical function declaration
void invalidateCustomPlugin(int idx);
int pclInitLibrary(const char* appName, int shutdownMode)
{
int status = 0;
int i = 0, rval = 0;
if(gPclInitialized == PCLnotInitialized)
{
gPclInitialized++;
gShutdownMode = shutdownMode;
DLT_REGISTER_CONTEXT(gDLTContext,"pers","Context for persistence client library logging");
DLT_LOG(gDLTContext, DLT_LOG_INFO, DLT_STRING("pclInitLibrary => I N I T Persistence Client Library - "), DLT_STRING(gAppId),
DLT_STRING("- init counter: "), DLT_INT(gPclInitialized) );
/// environment variable for on demand loading of custom libraries
const char *pOnDemandLoad = getenv("PERS_CUSTOM_LIB_LOAD_ON_DEMAND");
/// environment variable for max key value data
const char *pDataSize = getenv("PERS_MAX_KEY_VAL_DATA_SIZE");
if(pDataSize != NULL)
{
gMaxKeyValDataSize = atoi(pDataSize);
}
setup_dbus_mainloop();
#if USE_DBUS
// register for lifecycle and persistence admin service dbus messages
register_lifecycle(shutdownMode);
register_pers_admin_service();
#endif
// clear the open file descriptor array
memset(gOpenFdArray, 0, MaxPersHandle * sizeof(int));
/// get custom library names to load
status = get_custom_libraries();
if(status >= 0)
{
// initialize custom library structure
for(i = 0; i < PersCustomLib_LastEntry; i++)
{
invalidateCustomPlugin(i);
}
if(pOnDemandLoad == NULL) // load all available libraries now
{
for(i=0; i < PersCustomLib_LastEntry; i++ )
{
if(check_valid_idx(i) != -1)
{
if(load_custom_library(i, &gPersCustomFuncs[i] ) == 1)
{
if( (gPersCustomFuncs[i].custom_plugin_init) != NULL)
{
DLT_LOG(gDLTContext, DLT_LOG_INFO, DLT_STRING("pclInitLibrary => Loaded plugin: "),
DLT_STRING(get_custom_client_lib_name(i)));
gPersCustomFuncs[i].custom_plugin_init();
}
else
{
DLT_LOG(gDLTContext, DLT_LOG_ERROR, DLT_STRING("pclInitLibrary => E r r o r could not load plugin functions: "),
DLT_STRING(get_custom_client_lib_name(i)));
}
}
else
{
DLT_LOG(gDLTContext, DLT_LOG_ERROR, DLT_STRING("pclInitLibrary => E r r o r could not load plugin: "),
DLT_STRING(get_custom_client_lib_name(i)));
}
}
else
{
continue;
}
}
}
}
else
{
DLT_LOG(gDLTContext, DLT_LOG_WARN, DLT_STRING("pclInit => Failed to load custom library config table => error number:"), DLT_INT(status));
}
// assign application name
strncpy(gAppId, appName, MaxAppNameLen);
gAppId[MaxAppNameLen-1] = '\0';
// destory mutex
pthread_mutex_destroy(&gDbusInitializedMtx);
pthread_cond_destroy(&gDbusInitializedCond);
rval = 1;
}
else if(gPclInitialized >= PCLinitialized)
{
gPclInitialized++; // increment init counter
DLT_LOG(gDLTContext, DLT_LOG_INFO, DLT_STRING("pclInitLibrary => I N I T Persistence Client Library - "), DLT_STRING(gAppId),
DLT_STRING("- ONLY INCREMENT init counter: "), DLT_INT(gPclInitialized) );
}
return rval;
}
int pclDeinitLibrary(void)
{
int i = 0, rval = 1;
if(gPclInitialized == PCLinitialized)
{
DLT_LOG(gDLTContext, DLT_LOG_INFO, DLT_STRING("pclDeinitLibrary -> D E I N I T client library - "), DLT_STRING(gAppId),
DLT_STRING("- init counter: "), DLT_INT(gPclInitialized));
// unregister for lifecycle and persistence admin service dbus messages
#if USE_DBUS
unregister_lifecycle(gShutdownMode);
unregister_pers_admin_service();
#endif
// unload custom client libraries
for(i=0; i<PersCustomLib_LastEntry; i++)
{
if(gPersCustomFuncs[i].custom_plugin_deinit != NULL)
{
// deinitialize plugin
gPersCustomFuncs[i].custom_plugin_deinit();
// close library handle
dlclose(gPersCustomFuncs[i].handle);
invalidateCustomPlugin(i);
}
}
gPclInitialized = PCLnotInitialized;
DLT_UNREGISTER_CONTEXT(gDLTContext);
}
else if(gPclInitialized > PCLinitialized)
{
DLT_LOG(gDLTContext, DLT_LOG_INFO, DLT_STRING("pclDeinitLibrary -> D E I N I T client library - "), DLT_STRING(gAppId),
DLT_STRING("- ONLY DECREMENT init counter: "), DLT_INT(gPclInitialized));
gPclInitialized--; // decrement init counter
}
return rval;
}
void invalidateCustomPlugin(int idx)
{
gPersCustomFuncs[idx].handle = NULL;
gPersCustomFuncs[idx].custom_plugin_init = NULL;
gPersCustomFuncs[idx].custom_plugin_deinit = NULL;
gPersCustomFuncs[idx].custom_plugin_handle_open = NULL;
gPersCustomFuncs[idx].custom_plugin_handle_close = NULL;
gPersCustomFuncs[idx].custom_plugin_handle_get_data = NULL;
gPersCustomFuncs[idx].custom_plugin_handle_set_data = NULL;
gPersCustomFuncs[idx].custom_plugin_get_data = NULL;
gPersCustomFuncs[idx].custom_plugin_set_data = NULL;
gPersCustomFuncs[idx].custom_plugin_delete_data = NULL;
gPersCustomFuncs[idx].custom_plugin_get_status_notification_clbk = NULL;
gPersCustomFuncs[idx].custom_plugin_handle_get_size = NULL;
gPersCustomFuncs[idx].custom_plugin_get_size = NULL;
gPersCustomFuncs[idx].custom_plugin_create_backup = NULL;
gPersCustomFuncs[idx].custom_plugin_get_backup = NULL;
gPersCustomFuncs[idx].custom_plugin_restore_backup = NULL;
}
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