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// Copyright 2018 The gVisor Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef GVISOR_TEST_UTIL_SAVE_UTIL_H_
#define GVISOR_TEST_UTIL_SAVE_UTIL_H_
namespace gvisor {
namespace testing {
// Disable save prevents saving while the given function executes.
//
// This lasts the duration of the object, unless reset is called.
class DisableSave {
public:
DisableSave();
~DisableSave();
DisableSave(DisableSave const&) = delete;
DisableSave(DisableSave&&) = delete;
DisableSave& operator=(DisableSave const&) = delete;
DisableSave& operator=(DisableSave&&) = delete;
// reset allows saves to continue, and is called implicitly by the destructor.
// It may be called multiple times safely, but is not thread-safe.
void reset();
private:
bool reset_ = false;
};
// May perform a co-operative save cycle.
//
// errno is guaranteed to be preserved.
void MaybeSave();
} // namespace testing
} // namespace gvisor
#endif // GVISOR_TEST_UTIL_SAVE_UTIL_H_
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