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65 lines
1.9 KiB
C
65 lines
1.9 KiB
C
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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef BASE_SCOPED_NATIVE_LIBRARY_H_
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#define BASE_SCOPED_NATIVE_LIBRARY_H_
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#include "base/base_export.h"
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#include "base/macros.h"
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#include "base/native_library.h"
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#include "base/scoped_generic.h"
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namespace base {
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class FilePath;
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struct BASE_EXPORT NativeLibraryTraits {
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// It's assumed that this is a fast inline function with little-to-no
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// penalty for duplicate calls. This must be a static function even
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// for stateful traits.
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static NativeLibrary InvalidValue() { return nullptr; }
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// This free function will not be called if library == InvalidValue()!
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static void Free(NativeLibrary library);
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};
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// A class which encapsulates a base::NativeLibrary object available only in a
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// scope.
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// This class automatically unloads the loaded library in its destructor.
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class BASE_EXPORT ScopedNativeLibrary
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: public ScopedGeneric<NativeLibrary, NativeLibraryTraits> {
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public:
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// Initializes with a NULL library.
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ScopedNativeLibrary();
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~ScopedNativeLibrary() override;
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// Takes ownership of the given library handle.
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explicit ScopedNativeLibrary(NativeLibrary library);
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// Opens the given library and manages its lifetime.
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explicit ScopedNativeLibrary(const FilePath& library_path);
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// Move constructor. Takes ownership of handle stored in |scoped_library|
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ScopedNativeLibrary(ScopedNativeLibrary&& scoped_library);
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// Move assignment operator. Takes ownership of handle stored in
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// |scoped_library|.
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ScopedNativeLibrary& operator=(ScopedNativeLibrary&& scoped_library) =
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default;
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void* GetFunctionPointer(const char* function_name) const;
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const NativeLibraryLoadError* GetError() const;
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private:
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NativeLibraryLoadError error_;
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DISALLOW_COPY_AND_ASSIGN(ScopedNativeLibrary);
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};
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} // namespace base
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#endif // BASE_SCOPED_NATIVE_LIBRARY_H_
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