static int module_create(MODULE_HOST * module_host, BROKER_HANDLE broker, GATEWAY_MODULE_LOADER_INFO * gw_loader_info, const char * remote_module_args)
{
int result;
if (remote_module_args == NULL)
{
/*Codes_SRS_NATIVEMODULEHOST_17_026: [ If any step above fails, then NativeModuleHost_Create shall free all resources allocated and return NULL. ]*/
LogError("An error occurred getting module args for module");
result = __LINE__;
}
else
{
/*Codes_SRS_NATIVEMODULEHOST_17_019: [ NativeModuleHost_Create shall load the module library with the pasred entrypoint. ]*/
module_host->module_library_handle = gw_loader_info->loader->api->Load(
gw_loader_info->loader,
gw_loader_info->entrypoint);
if (module_host->module_library_handle == NULL)
{
/*Codes_SRS_NATIVEMODULEHOST_17_026: [ If any step above fails, then NativeModuleHost_Create shall free all resources allocated and return NULL. ]*/
result = __LINE__;
}
else
{
MODULE_LOADER_API* loader_api = gw_loader_info->loader->api;
/*Codes_SRS_NATIVEMODULEHOST_17_020: [ NativeModuleHost_Create shall get the MODULE_API pointer from the loader. ]*/
const MODULE_API* module_apis = loader_api->GetApi(gw_loader_info->loader, module_host->module_library_handle);
if (module_apis == NULL)
{
/*Codes_SRS_NATIVEMODULEHOST_17_026: [ If any step above fails, then NativeModuleHost_Create shall free all resources allocated and return NULL. ]*/
loader_api->Unload(gw_loader_info->loader, module_host->module_library_handle);
result = __LINE__;
}
else
{
/*Codes_SRS_NATIVEMODULEHOST_17_021: [ NativeModuleHost_Create shall call the module's _ParseConfigurationFromJson on the "module.args" object. ]*/
const void* module_configuration = MODULE_PARSE_CONFIGURATION_FROM_JSON(module_apis)(remote_module_args);
/*Codes_SRS_NATIVEMODULEHOST_17_022: [ NativeModuleHost_Create shall build the module confguration from the parsed entrypoint and parsed module arguments. ]*/
const void* transformed_module_configuration = loader_api->BuildModuleConfiguration(
gw_loader_info->loader,
gw_loader_info->entrypoint,
module_configuration
);
/*Codes_SRS_NATIVEMODULEHOST_17_023: [ NativeModuleHost_Create shall call the module's _Create on the built module configuration. ]*/
module_host->module = MODULE_CREATE(module_apis)(broker, transformed_module_configuration);
if (module_host->module == NULL)
{
/*Codes_SRS_NATIVEMODULEHOST_17_026: [ If any step above fails, then NativeModuleHost_Create shall free all resources allocated and return NULL. ]*/
loader_api->Unload(gw_loader_info->loader, module_host->module_library_handle);
result = __LINE__;
}
else
{
/*Codes_SRS_NATIVEMODULEHOST_17_025: [ NativeModuleHost_Create shall return a non-null pointer to a MODULE_HANDLE on success. ]*/
module_host->module_loader = gw_loader_info->loader;
module_host->module_host_broker = broker;
result = 0;
}
/*Codes_SRS_NATIVEMODULEHOST_17_024: [ NativeModuleHost_Create shall free all resources used during module loading. ]*/
MODULE_FREE_CONFIGURATION(module_apis)((void*)module_configuration);
loader_api->FreeModuleConfiguration(gw_loader_info->loader, transformed_module_configuration);
}
}
}
return result;
}
static MODULE_LIBRARY_HANDLE NodeModuleLoader_Load(const MODULE_LOADER* loader, const void* entrypoint)
{
NODE_MODULE_HANDLE_DATA* result;
// loader cannot be null
if (loader == NULL)
{
//Codes_SRS_NODE_MODULE_LOADER_13_001 : [NodeModuleLoader_Load shall return NULL if loader is NULL.]
result = NULL;
LogError("invalid inputs - loader = %p", loader);
}
else
{
if (loader->type != NODEJS)
{
//Codes_SRS_NODE_MODULE_LOADER_13_002 : [NodeModuleLoader_Load shall return NULL if loader->type is not NODEJS.]
result = NULL;
LogError("loader->type is not NODEJS");
}
else
{
result = (NODE_MODULE_HANDLE_DATA*)malloc(sizeof(NODE_MODULE_HANDLE_DATA));
if (result == NULL)
{
//Codes_SRS_NODE_MODULE_LOADER_13_003 : [NodeModuleLoader_Load shall return NULL if an underlying platform call fails.]
LogError("malloc returned NULL");
}
else
{
result->binding_module = NodeModuleLoader_LoadBindingModule(loader);
if (result->binding_module == NULL)
{
LogError("NodeModuleLoader_LoadBindingModule returned NULL");
//Codes_SRS_NODE_MODULE_LOADER_13_003 : [NodeModuleLoader_Load shall return NULL if an underlying platform call fails.]
free(result);
result = NULL;
}
else
{
//Codes_SRS_NODE_MODULE_LOADER_13_033: [ NodeModuleLoader_Load shall call DynamicLibrary_FindSymbol on the binding module handle with the symbol name Module_GetApi to acquire the function that returns the module's API table. ]
pfModule_GetApi pfnGetAPI = (pfModule_GetApi)DynamicLibrary_FindSymbol(result->binding_module, MODULE_GETAPI_NAME);
if (pfnGetAPI == NULL)
{
DynamicLibrary_UnloadLibrary(result->binding_module);
free(result);
//Codes_SRS_NODE_MODULE_LOADER_13_003 : [NodeModuleLoader_Load shall return NULL if an underlying platform call fails.]
result = NULL;
LogError("DynamicLibrary_FindSymbol() returned NULL");
}
else
{
//Codes_SRS_NODE_MODULE_LOADER_13_005 : [NodeModuleLoader_Load shall return a non - NULL pointer of type MODULE_LIBRARY_HANDLE when successful.]
result->api = pfnGetAPI(Module_ApiGatewayVersion);
//Codes_SRS_NODE_MODULE_LOADER_13_034: [ NodeModuleLoader_Load shall return NULL if the MODULE_API pointer returned by the binding module is NULL. ]
//Codes_SRS_NODE_MODULE_LOADER_13_035: [ NodeModuleLoader_Load shall return NULL if MODULE_API::version is greater than Module_ApiGatewayVersion. ]
//Codes_SRS_NODE_MODULE_LOADER_13_036: [ NodeModuleLoader_Load shall return NULL if the Module_Create function in MODULE_API is NULL. ]
//Codes_SRS_NODE_MODULE_LOADER_13_037: [ NodeModuleLoader_Load shall return NULL if the Module_Receive function in MODULE_API is NULL. ]
//Codes_SRS_NODE_MODULE_LOADER_13_038: [ NodeModuleLoader_Load shall return NULL if the Module_Destroy function in MODULE_API is NULL. ]
/* if any of the required functions is NULL then we have a misbehaving module */
if (result->api == NULL ||
result->api->version > Module_ApiGatewayVersion ||
MODULE_CREATE(result->api) == NULL ||
MODULE_DESTROY(result->api) == NULL ||
MODULE_RECEIVE(result->api) == NULL)
{
LogError(
"pfnGetapi() returned an invalid MODULE_API instance. "
"result->api = %p, "
"result->api->version = %d, "
"MODULE_CREATE(result->api) = %p, "
"MODULE_DESTROY(result->api) = %p, "
"MODULE_RECEIVE(result->api) = %p, ",
result->api,
result->api != NULL ? result->api->version : 0x0,
result->api != NULL ? MODULE_CREATE(result->api) : NULL,
result->api != NULL ? MODULE_DESTROY(result->api) : NULL,
result->api != NULL ? MODULE_RECEIVE(result->api) : NULL
);
DynamicLibrary_UnloadLibrary(result->binding_module);
free(result);
//Codes_SRS_NODE_MODULE_LOADER_13_003 : [NodeModuleLoader_Load shall return NULL if an underlying platform call fails.]
result = NULL;
}
}
}
}
}
}
return result;
}