cef/include/cef_shared_memory_region.h
Nik Pavlov 8d7001adc3 Replace ReadOnlySharedMemoryRegion with WritableSharedMemoryRegion (see #3502)
Write access to the shared memory region is required because JavaScript lacks
the capability to create read-only ArrayBuffers. When a user attempts to modify
an ArrayBuffer that utilizes a ReadOnlySharedMemoryRegion as its BackingStore
it triggers an access violation.

Note that this pull request may be reverted in the future if JavaScript adds
read-only ArrayBuffer support.
2023-10-16 22:43:29 +00:00

70 lines
2.7 KiB
C++

// Copyright (c) 2022 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
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// ---------------------------------------------------------------------------
//
// The contents of this file must follow a specific format in order to
// support the CEF translator tool. See the translator.README.txt file in the
// tools directory for more information.
//
#ifndef CEF_INCLUDE_CEF_SHARED_MEMORY_REGION_H_
#define CEF_INCLUDE_CEF_SHARED_MEMORY_REGION_H_
#pragma once
#include "include/cef_base.h"
///
/// Class that wraps platform-dependent share memory region mapping.
///
/*--cef(source=library)--*/
class CefSharedMemoryRegion : public virtual CefBaseRefCounted {
public:
///
/// Returns true if the mapping is valid.
///
/*--cef()--*/
virtual bool IsValid() = 0;
///
/// Returns the size of the mapping in bytes. Returns 0 for invalid instances.
///
/*--cef()--*/
virtual size_t Size() = 0;
///
/// Returns the pointer to the memory. Returns nullptr for invalid instances.
/// The returned pointer is only valid for the life span of this object.
///
/*--cef()--*/
virtual void* Memory() = 0;
};
#endif // CEF_INCLUDE_CEF_SHARED_MEMORY_REGION_H_