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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/scoped_native_library.h"
#include "build/build_config.h"
#include "testing/gtest/include/gtest/gtest.h"
#if defined(OS_WIN)
#include "base/files/file_path.h"
#endif
namespace base {
// Tests whether or not a function pointer retrieved via ScopedNativeLibrary
// is available only in a scope.
TEST(ScopedNativeLibrary, Basic) {
#if defined(OS_WIN)
// Get the pointer to DirectDrawCreate() from "ddraw.dll" and verify it
// is valid only in this scope.
// FreeLibrary() doesn't actually unload a DLL until its reference count
// becomes zero, i.e. function pointer is still valid if the DLL used
// in this test is also used by another part of this executable.
// So, this test uses "ddraw.dll", which is not used by Chrome at all but
// installed on all versions of Windows.
const char kFunctionName[] = "DirectDrawCreate";
NativeLibrary native_library;
{
FilePath path(GetNativeLibraryName(L"ddraw"));
native_library = LoadNativeLibrary(path, NULL);
ScopedNativeLibrary library(native_library);
EXPECT_TRUE(library.is_valid());
EXPECT_EQ(native_library, library.get());
FARPROC test_function =
reinterpret_cast<FARPROC>(library.GetFunctionPointer(kFunctionName));
EXPECT_EQ(0, IsBadCodePtr(test_function));
EXPECT_EQ(
GetFunctionPointerFromNativeLibrary(native_library, kFunctionName),
test_function);
}
EXPECT_EQ(NULL,
GetFunctionPointerFromNativeLibrary(native_library, kFunctionName));
#endif
}
} // namespace base
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