2019-04-29 21:25:05 +00:00
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// Copyright 2018 The gVisor Authors.
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2018-12-10 22:41:40 +00:00
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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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#include "test/util/save_util.h"
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#include <stddef.h>
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#include <stdlib.h>
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#include <unistd.h>
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2019-08-26 21:04:24 +00:00
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2018-12-10 22:41:40 +00:00
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#include <atomic>
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#include <cerrno>
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#define GVISOR_COOPERATIVE_SAVE_TEST "GVISOR_COOPERATIVE_SAVE_TEST"
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namespace gvisor {
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namespace testing {
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namespace {
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2019-01-09 22:26:52 +00:00
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enum class CooperativeSaveMode {
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kUnknown = 0, // cooperative_save_mode is statically-initialized to 0
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kAvailable,
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kNotAvailable,
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};
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std::atomic<CooperativeSaveMode> cooperative_save_mode;
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2018-12-10 22:41:40 +00:00
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bool CooperativeSaveEnabled() {
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2019-01-09 22:26:52 +00:00
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auto mode = cooperative_save_mode.load();
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if (mode == CooperativeSaveMode::kUnknown) {
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mode = (getenv(GVISOR_COOPERATIVE_SAVE_TEST) != nullptr)
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? CooperativeSaveMode::kAvailable
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: CooperativeSaveMode::kNotAvailable;
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cooperative_save_mode.store(mode);
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}
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return mode == CooperativeSaveMode::kAvailable;
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2018-12-10 22:41:40 +00:00
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}
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std::atomic<int> save_disable;
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} // namespace
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DisableSave::DisableSave() { save_disable++; }
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DisableSave::~DisableSave() { reset(); }
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void DisableSave::reset() {
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if (!reset_) {
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reset_ = true;
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save_disable--;
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}
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}
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2019-08-26 21:04:24 +00:00
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namespace internal {
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bool ShouldSave() {
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return CooperativeSaveEnabled() && (save_disable.load() == 0);
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2018-12-10 22:41:40 +00:00
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}
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2019-08-26 21:04:24 +00:00
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} // namespace internal
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2018-12-10 22:41:40 +00:00
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} // namespace testing
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} // namespace gvisor
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