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https://github.com/google/sandboxed-api.git
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d05dc7ba02
This is the first change in a series that will eventually remove Sandboxed API's use of multiple inheritance. Drive-by: - Rename short member names to full words - Some reformatting PiperOrigin-RevId: 402270954 Change-Id: I8af46b887921265a371b85603fd158ef3a8fab50
95 lines
2.6 KiB
C++
95 lines
2.6 KiB
C++
// Copyright 2019 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef SANDBOXED_API_VAR_POINTABLE_H_
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#define SANDBOXED_API_VAR_POINTABLE_H_
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#include <memory>
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#include "sandboxed_api/var_reg.h"
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namespace sapi::v {
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class Ptr;
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// Class that implements pointer support for different objects.
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class Pointable {
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public:
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enum SyncType {
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// Do not synchronize the underlying object after/before calls.
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kSyncNone = 0x0,
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// Synchronize the underlying object (send the data to the sandboxee)
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// before the call takes place.
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kSyncBefore = 0x1,
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// Synchronize the underlying object (retrieve data from the sandboxee)
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// after the call has finished.
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kSyncAfter = 0x2,
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// Synchronize the underlying object with the remote object, by sending the
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// data to the sandboxee before the call, and retrieving it from the
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// sandboxee after the call has finished.
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kSyncBoth = kSyncBefore | kSyncAfter,
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};
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virtual ~Pointable() = default;
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// Functions to get pointers with certain type of synchronization scheme.
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Ptr* PtrNone() {
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if (ptr_none_ == nullptr) {
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ptr_none_.reset(CreatePtr(kSyncNone));
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}
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return ptr_none_.get();
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}
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Ptr* PtrBoth() {
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if (ptr_both_ == nullptr) {
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ptr_both_.reset(CreatePtr(kSyncBoth));
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}
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return ptr_both_.get();
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}
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Ptr* PtrBefore() {
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if (ptr_before_ == nullptr) {
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ptr_before_.reset(CreatePtr(kSyncBefore));
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}
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return ptr_before_.get();
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}
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Ptr* PtrAfter() {
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if (ptr_after_ == nullptr) {
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ptr_after_.reset(CreatePtr(kSyncAfter));
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}
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return ptr_after_.get();
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}
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private:
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// Needed so that we can use unique_ptr with incomplete type.
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struct PtrDeleter {
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void operator()(Ptr* p);
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};
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// Necessary to implement creation of Ptr in inheriting class as it is
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// incomplete type here.
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virtual Ptr* CreatePtr(SyncType sync_type) = 0;
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std::unique_ptr<Ptr, PtrDeleter> ptr_none_;
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std::unique_ptr<Ptr, PtrDeleter> ptr_both_;
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std::unique_ptr<Ptr, PtrDeleter> ptr_before_;
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std::unique_ptr<Ptr, PtrDeleter> ptr_after_;
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};
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} // namespace sapi::v
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#endif // SANDBOXED_API_VAR_POINTABLE_H_
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