cef/include/wrapper/cef_library_loader.h

134 lines
4.2 KiB
C++

// Copyright (c) 2018 Marshall A. Greenblatt. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the name Chromium Embedded
// Framework nor the names of its contributors may be used to endorse
// or promote products derived from this software without specific prior
// written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#ifndef CEF_INCLUDE_WRAPPER_CEF_LIBRARY_LOADER_H_
#define CEF_INCLUDE_WRAPPER_CEF_LIBRARY_LOADER_H_
#pragma once
#include "include/base/cef_build.h"
#ifdef __cplusplus
#include <string>
extern "C" {
#endif // __cplusplus
///
/// Load the CEF library at the specified |path|. Returns true (1) on
/// success and false (0) on failure.
///
int cef_load_library(const char* path);
///
/// Unload the CEF library that was previously loaded. Returns true (1)
/// on success and false (0) on failure.
///
int cef_unload_library(void);
#ifdef __cplusplus
}
#if defined(OS_MAC)
///
/// Scoped helper for loading and unloading the CEF framework library at
/// runtime from the expected location in the app bundle. Loading at runtime
/// instead of linking directly is a requirement of the macOS sandbox
/// implementation.
///
/// Example usage in the main process:
///
/// <pre>
/// #include "include/wrapper/cef_library_loader.h"
///
/// int main(int argc, char* argv[]) {
/// // Dynamically load the CEF framework library.
/// CefScopedLibraryLoader library_loader;
/// if (!library_loader.LoadInMain())
/// return 1;
///
/// // Continue with CEF initialization...
/// }
/// </pre>
///
/// Example usage in the helper process:
///
/// <pre>
/// #include "include/cef_sandbox_mac.h"
/// #include "include/wrapper/cef_library_loader.h"
///
/// int main(int argc, char* argv[]) {
/// // Initialize the macOS sandbox for this helper process.
/// CefScopedSandboxContext sandbox_context;
/// if (!sandbox_context.Initialize(argc, argv))
/// return 1;
///
/// // Dynamically load the CEF framework library.
/// CefScopedLibraryLoader library_loader;
/// if (!library_loader.LoadInHelper())
/// return 1;
///
/// // Continue with CEF initialization...
/// }
/// </pre>
///
class CefScopedLibraryLoader {
public:
CefScopedLibraryLoader();
CefScopedLibraryLoader(const CefScopedLibraryLoader&) = delete;
CefScopedLibraryLoader& operator=(const CefScopedLibraryLoader&) = delete;
~CefScopedLibraryLoader();
///
/// Load the CEF framework in the main process from the expected app
/// bundle location relative to the executable. Returns true if the
/// load succeeds.
///
bool LoadInMain() { return Load(false); }
///
/// Load the CEF framework in the helper process from the expected app
/// bundle location relative to the executable. Returns true if the
/// load succeeds.
///
bool LoadInHelper() { return Load(true); }
private:
bool Load(bool helper);
bool loaded_;
};
#endif // defined(OS_MAC)
#endif // __cplusplus
#endif // CEF_INCLUDE_WRAPPER_CEF_LIBRARY_LOADER_H_