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mbed-os/platform/CriticalSectionLock.h
- Committer:
- kadonotakashi
- Date:
- 2018-10-10
- Revision:
- 0:8fdf9a60065b
File content as of revision 0:8fdf9a60065b:
/* * PackageLicenseDeclared: Apache-2.0 * Copyright (c) 2017 ARM Limited * * 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 MBED_CRITICALSECTIONLOCK_H #define MBED_CRITICALSECTIONLOCK_H #include "platform/mbed_critical.h" #include "platform/mbed_toolchain.h" namespace mbed { /** \addtogroup platform */ /** @{*/ /** * \defgroup platform_CriticalSectionLock CriticalSectionLock functions * @{ */ /** RAII object for disabling, then restoring, interrupt state * Usage: * @code * * // RAII style usage * unsigned int atomic_counter_increment(unsigned int &counter) { * CriticalSectionLock lock; * // Code in this block will run with interrupts disabled * // Interrupts will be restored to their previous state automatically * // at the end of function scope * return ++counter; * } * * // free locking usage * unsigned int atomic_counter_decrement(unsigned int &counter) { * CriticalSectionLock::enable(); * // Code in this block will run with interrupts disabled * counter--; * CriticalSectionLock::disable(); // need explicitly to disable critical section lock * // interrupts will be restored to their previous state here * return counter; * } * * @endcode */ class CriticalSectionLock { public: CriticalSectionLock() { core_util_critical_section_enter(); } ~CriticalSectionLock() { core_util_critical_section_exit(); } /** Mark the start of a critical section * @deprecated This function is inconsistent with RAII and is being removed in the future. Replaced by static function CriticalSectionLock::enable. * */ MBED_DEPRECATED_SINCE("mbed-os-5.8", "This function is inconsistent with RAII and is being removed in the future." "Replaced by static function CriticalSectionLock::enable.") void lock() { core_util_critical_section_enter(); } /** Mark the end of a critical section * @deprecated This function is inconsistent with RAII and is being removed in the future. Replaced by static function CriticalSectionLock::enable. * */ MBED_DEPRECATED_SINCE("mbed-os-5.8", "This function is inconsistent with RAII and is being removed in the future." "Replaced by static function CriticalSectionLock::disable.") void unlock() { core_util_critical_section_exit(); } /** Mark the start of a critical section */ static void enable() { core_util_critical_section_enter(); } /** Mark the end of a critical section */ static void disable() { core_util_critical_section_exit(); } }; /**@}*/ /**@}*/ } // namespace mbed #endif