crashpad/util/win/get_function.cc
Mark Mentovai d075a9eb2e win: Add and use GET_FUNCTION() and GET_FUNCTION_REQUIRED()
These wrap the GetProcAddress(LoadLibrary(), …) idiom into macros that
are much less wordy.

TEST=crashpad_util_test GetFunction.GetFunction and all others
R=scottmg@chromium.org

Review URL: https://codereview.chromium.org/1405323003 .
2015-10-19 14:32:07 -04:00

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// Copyright 2015 The Crashpad Authors. All rights reserved.
//
// 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.
#include "util/win/get_function.h"
#include "base/logging.h"
#include "base/strings/utf_string_conversions.h"
namespace crashpad {
namespace internal {
FARPROC GetFunctionInternal(
const wchar_t* library, const char* function, bool required) {
HMODULE module = LoadLibrary(library);
DPCHECK(!required || module) << "LoadLibrary " << base::UTF16ToUTF8(library);
if (!module) {
return nullptr;
}
// Strip off any leading :: that may have come from stringifying the
// functions name.
if (function[0] == ':' && function[1] == ':' &&
function[2] && function[2] != ':') {
function += 2;
}
FARPROC proc = GetProcAddress(module, function);
DPCHECK(!required || proc) << "GetProcAddress " << function;
return proc;
}
} // namespace internal
} // namespace crashpad