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65 lines
2.0 KiB
65 lines
2.0 KiB
// |
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// Copyright (C) 2012 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 UPDATE_ENGINE_COMMON_TERMINATOR_H_ |
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#define UPDATE_ENGINE_COMMON_TERMINATOR_H_ |
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#include <signal.h> |
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#include <gtest/gtest_prod.h> // for FRIEND_TEST |
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namespace chromeos_update_engine { |
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// A class allowing graceful delayed exit. |
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class Terminator { |
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public: |
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// Initializes the terminator and sets up signal handlers. |
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static void Init(); |
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static void Init(int exit_status); |
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// Terminates the current process. |
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static void Exit(); |
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// Set to true if the terminator should block termination requests in an |
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// attempt to block exiting. |
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static void set_exit_blocked(bool block) { exit_blocked_ = block ? 1 : 0; } |
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static bool exit_blocked() { return exit_blocked_ != 0; } |
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// Returns true if the system is trying to terminate the process, false |
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// otherwise. Returns true only if exit was blocked when the termination |
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// request arrived. |
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static bool exit_requested() { return exit_requested_ != 0; } |
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private: |
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FRIEND_TEST(TerminatorTest, HandleSignalTest); |
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FRIEND_TEST(TerminatorDeathTest, ScopedTerminatorExitUnblockerExitTest); |
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// The signal handler. |
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static void HandleSignal(int signum); |
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static volatile sig_atomic_t exit_status_; |
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static volatile sig_atomic_t exit_blocked_; |
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static volatile sig_atomic_t exit_requested_; |
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}; |
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class ScopedTerminatorExitUnblocker { |
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public: |
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~ScopedTerminatorExitUnblocker(); |
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}; |
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} // namespace chromeos_update_engine |
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#endif // UPDATE_ENGINE_COMMON_TERMINATOR_H_
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