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76 lines
2.0 KiB
C++
76 lines
2.0 KiB
C++
// Copyright 2013 The Flutter 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 FLUTTER_FML_NATIVE_LIBRARY_H_
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#define FLUTTER_FML_NATIVE_LIBRARY_H_
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#include <optional>
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#include "flutter/fml/build_config.h"
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#include "flutter/fml/macros.h"
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#include "flutter/fml/memory/ref_counted.h"
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#include "flutter/fml/memory/ref_ptr.h"
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#if defined(FML_OS_WIN)
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#include <windows.h>
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#endif // defined(FML_OS_WIN)
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namespace fml {
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class NativeLibrary : public fml::RefCountedThreadSafe<NativeLibrary> {
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public:
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#if FML_OS_WIN
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using Handle = HMODULE;
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using SymbolHandle = FARPROC;
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#else // FML_OS_WIN
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using Handle = void*;
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using SymbolHandle = void*;
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#endif // FML_OS_WIN
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static fml::RefPtr<NativeLibrary> Create(const char* path);
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static fml::RefPtr<NativeLibrary> CreateWithHandle(
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Handle handle,
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bool close_handle_when_done);
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static fml::RefPtr<NativeLibrary> CreateForCurrentProcess();
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template <typename T>
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const std::optional<T> ResolveFunction(const char* symbol) {
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auto* resolved_symbol = Resolve(symbol);
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if (!resolved_symbol) {
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return std::nullopt;
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}
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return std::optional<T>(reinterpret_cast<T>(resolved_symbol));
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}
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const uint8_t* ResolveSymbol(const char* symbol) {
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auto* resolved_symbol = reinterpret_cast<const uint8_t*>(Resolve(symbol));
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if (resolved_symbol == nullptr) {
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FML_DLOG(INFO) << "Could not resolve symbol in library: " << symbol;
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}
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return resolved_symbol;
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}
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private:
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Handle handle_ = nullptr;
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bool close_handle_ = true;
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explicit NativeLibrary(const char* path);
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NativeLibrary(Handle handle, bool close_handle);
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~NativeLibrary();
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Handle GetHandle() const;
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SymbolHandle Resolve(const char* symbol) const;
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FML_DISALLOW_COPY_AND_ASSIGN(NativeLibrary);
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FML_FRIEND_REF_COUNTED_THREAD_SAFE(NativeLibrary);
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FML_FRIEND_MAKE_REF_COUNTED(NativeLibrary);
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};
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} // namespace fml
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#endif // FLUTTER_FML_NATIVE_LIBRARY_H_
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