84 lines
2.3 KiB
C++
84 lines
2.3 KiB
C++
/*
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* Copyright (C) 2018 The Android Open Source Project
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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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*/
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#ifndef _LIBDM_TEST_UTILS_H_
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#define _LIBDM_TEST_UTILS_H_
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#include <android-base/unique_fd.h>
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#include <stddef.h>
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#include <chrono>
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#include <string>
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#include <libdm/dm.h>
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#include <libdm/dm_table.h>
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namespace android {
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namespace dm {
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// Create a temporary in-memory file. If size is non-zero, the file will be
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// created with a fixed size.
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android::base::unique_fd CreateTempFile(const std::string& name, size_t size);
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// Helper to ensure that device mapper devices are released.
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class TempDevice {
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public:
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TempDevice(const std::string& name, const DmTable& table)
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: dm_(DeviceMapper::Instance()), name_(name), valid_(false) {
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valid_ = dm_.CreateDevice(name, table, &path_, std::chrono::seconds(5));
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}
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TempDevice(TempDevice&& other) noexcept
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: dm_(other.dm_), name_(other.name_), path_(other.path_), valid_(other.valid_) {
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other.valid_ = false;
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}
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~TempDevice() {
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if (valid_) {
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dm_.DeleteDevice(name_);
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}
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}
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bool Destroy() {
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if (!valid_) {
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return false;
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}
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valid_ = false;
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return dm_.DeleteDevice(name_);
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}
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std::string path() const { return path_; }
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const std::string& name() const { return name_; }
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bool valid() const { return valid_; }
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TempDevice(const TempDevice&) = delete;
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TempDevice& operator=(const TempDevice&) = delete;
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TempDevice& operator=(TempDevice&& other) noexcept {
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name_ = other.name_;
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valid_ = other.valid_;
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other.valid_ = false;
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return *this;
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}
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private:
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DeviceMapper& dm_;
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std::string name_;
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std::string path_;
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bool valid_;
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};
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} // namespace dm
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} // namespace android
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#endif // _LIBDM_TEST_UTILS_H_
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