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LibraryHandleWin32.cpp
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82 lines (63 loc) · 2.03 KB
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/** @file
@brief Implementation
@date 2014
@author
Ryan Pavlik
<ryan@sensics.com>
<http://sensics.com>
*/
// Copyright 2014 Sensics, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Internal Includes
#include "LibraryHandleWin32.h"
#include <libfunctionality/Exceptions.h>
// Library/third-party includes
// - none
// Standard includes
#include <string>
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
namespace libfunc {
static std::string getLastErrorMessage() {
std::string error_msg;
const auto error_code = GetLastError();
if (ERROR_SUCCESS == error_code)
return error_msg;
char *buffer = NULL;
FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
NULL, error_code, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPTSTR)&buffer, 0, NULL);
if (!buffer)
return error_msg;
error_msg = buffer;
LocalFree(buffer);
return error_msg;
}
static void LibraryFreer(void *handle) {
FreeLibrary(static_cast<HMODULE>(handle));
}
LibraryHandle RAIILoadLibrary(std::string const &name) {
auto lib = LibraryHandle(static_cast<void *>(LoadLibrary(name.c_str())),
&LibraryFreer);
if (!lib) {
const auto error_msg = getLastErrorMessage();
if (error_msg.empty()) {
throw exceptions::CannotLoadPlugin(name);
} else {
throw exceptions::CannotLoadPlugin(name, error_msg.c_str());
}
}
return lib;
}
} // end of namespace libfunc