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// Copyright 2019 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/optional.h"
#include "content/common/content_export.h"
#include "content/public/browser/browser_or_resource_context.h"
#include "gpu/command_buffer/common/id_type.h"
namespace content {
class BrowsingInstance;
using BrowsingInstanceId = gpu::IdType32<BrowsingInstance>;
// This class is used to specify the context in which process model decisions
// need to be made. For example, dynamically added isolated origins only take
// effect in future BrowsingInstances, and this class can be used to specify
// that a process model decision is being made from a specific
// BrowsingInstance, so that only isolated origins that are applicable to that
// BrowsingInstance are used. This object may be used on UI or IO threads.
class CONTENT_EXPORT IsolationContext {
// Normal use cases should create an IsolationContext associated with both a
// BrowsingInstance and a BrowserContext (profile). The constructor that
// takes in a BrowserContext* may only be used on the UI thread; when
// creating this object on the IO thread, the BrowserOrResourceContext
// version should be used instead.
IsolationContext(BrowsingInstanceId browsing_instance_id,
BrowserContext* browser_context);
IsolationContext(BrowsingInstanceId browsing_instance_id,
BrowserOrResourceContext browser_or_resource_context);
// Also temporarily allow constructing an IsolationContext not associated
// with a specific BrowsingInstance. Callers can use this when they don't
// know the current BrowsingInstance, or aren't associated with one.
// TODO(alexmos): This is primarily used in tests, as well as in call sites
// which do not yet plumb proper BrowsingInstance information. Once the
// remaining non-test call sites are removed or updated, this should become a
// test-only API.
explicit IsolationContext(BrowserContext* browser_context);
~IsolationContext() = default;
// Returns the BrowsingInstance ID associated with this isolation context.
// BrowsingInstance IDs are ordered such that BrowsingInstances with lower
// IDs were created earlier than BrowsingInstances with higher IDs.
// If this is not specified (i.e., |browsing_instance_id().is_null()| is
// true), then this IsolationContext isn't restricted to any particular
// BrowsingInstance. Asking for isolated origins from an IsolationContext
// with a null |browsing_instance_id()| will return the latest available
// isolated origins.
BrowsingInstanceId browsing_instance_id() const {
return browsing_instance_id_;
// Return the BrowserOrResourceContext associated with this IsolationContext.
// This represents the profile associated with this IsolationContext, and can
// be used on both UI and IO threads.
const BrowserOrResourceContext& browser_or_resource_context() const {
return browser_or_resource_context_;
// When non-null, associates this context with a particular BrowsingInstance.
BrowsingInstanceId browsing_instance_id_;
BrowserOrResourceContext browser_or_resource_context_;
} // namespace content