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platform/CriticalSectionLock.h@0:13413ea9a877, 2022-06-12 (annotated)
- Committer:
- ganlikun
- Date:
- Sun Jun 12 14:02:44 2022 +0000
- Revision:
- 0:13413ea9a877
00
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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ganlikun | 0:13413ea9a877 | 1 | /* |
ganlikun | 0:13413ea9a877 | 2 | * PackageLicenseDeclared: Apache-2.0 |
ganlikun | 0:13413ea9a877 | 3 | * Copyright (c) 2017 ARM Limited |
ganlikun | 0:13413ea9a877 | 4 | * |
ganlikun | 0:13413ea9a877 | 5 | * Licensed under the Apache License, Version 2.0 (the "License"); |
ganlikun | 0:13413ea9a877 | 6 | * you may not use this file except in compliance with the License. |
ganlikun | 0:13413ea9a877 | 7 | * You may obtain a copy of the License at |
ganlikun | 0:13413ea9a877 | 8 | * |
ganlikun | 0:13413ea9a877 | 9 | * http://www.apache.org/licenses/LICENSE-2.0 |
ganlikun | 0:13413ea9a877 | 10 | * |
ganlikun | 0:13413ea9a877 | 11 | * Unless required by applicable law or agreed to in writing, software |
ganlikun | 0:13413ea9a877 | 12 | * distributed under the License is distributed on an "AS IS" BASIS, |
ganlikun | 0:13413ea9a877 | 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
ganlikun | 0:13413ea9a877 | 14 | * See the License for the specific language governing permissions and |
ganlikun | 0:13413ea9a877 | 15 | * limitations under the License. |
ganlikun | 0:13413ea9a877 | 16 | */ |
ganlikun | 0:13413ea9a877 | 17 | |
ganlikun | 0:13413ea9a877 | 18 | #ifndef MBED_CRITICALSECTIONLOCK_H |
ganlikun | 0:13413ea9a877 | 19 | #define MBED_CRITICALSECTIONLOCK_H |
ganlikun | 0:13413ea9a877 | 20 | |
ganlikun | 0:13413ea9a877 | 21 | #include "platform/mbed_critical.h" |
ganlikun | 0:13413ea9a877 | 22 | |
ganlikun | 0:13413ea9a877 | 23 | namespace mbed { |
ganlikun | 0:13413ea9a877 | 24 | |
ganlikun | 0:13413ea9a877 | 25 | /** RAII object for disabling, then restoring, interrupt state |
ganlikun | 0:13413ea9a877 | 26 | * Usage: |
ganlikun | 0:13413ea9a877 | 27 | * @code |
ganlikun | 0:13413ea9a877 | 28 | * |
ganlikun | 0:13413ea9a877 | 29 | * void f() { |
ganlikun | 0:13413ea9a877 | 30 | * // some code here |
ganlikun | 0:13413ea9a877 | 31 | * { |
ganlikun | 0:13413ea9a877 | 32 | * CriticalSectionLock lock; |
ganlikun | 0:13413ea9a877 | 33 | * // Code in this block will run with interrupts disabled |
ganlikun | 0:13413ea9a877 | 34 | * } |
ganlikun | 0:13413ea9a877 | 35 | * // interrupts will be restored to their previous state |
ganlikun | 0:13413ea9a877 | 36 | * } |
ganlikun | 0:13413ea9a877 | 37 | * @endcode |
ganlikun | 0:13413ea9a877 | 38 | */ |
ganlikun | 0:13413ea9a877 | 39 | class CriticalSectionLock { |
ganlikun | 0:13413ea9a877 | 40 | public: |
ganlikun | 0:13413ea9a877 | 41 | CriticalSectionLock() |
ganlikun | 0:13413ea9a877 | 42 | { |
ganlikun | 0:13413ea9a877 | 43 | core_util_critical_section_enter(); |
ganlikun | 0:13413ea9a877 | 44 | } |
ganlikun | 0:13413ea9a877 | 45 | |
ganlikun | 0:13413ea9a877 | 46 | ~CriticalSectionLock() |
ganlikun | 0:13413ea9a877 | 47 | { |
ganlikun | 0:13413ea9a877 | 48 | core_util_critical_section_exit(); |
ganlikun | 0:13413ea9a877 | 49 | } |
ganlikun | 0:13413ea9a877 | 50 | |
ganlikun | 0:13413ea9a877 | 51 | /** Mark the start of a critical section |
ganlikun | 0:13413ea9a877 | 52 | * |
ganlikun | 0:13413ea9a877 | 53 | */ |
ganlikun | 0:13413ea9a877 | 54 | void lock() |
ganlikun | 0:13413ea9a877 | 55 | { |
ganlikun | 0:13413ea9a877 | 56 | core_util_critical_section_enter(); |
ganlikun | 0:13413ea9a877 | 57 | } |
ganlikun | 0:13413ea9a877 | 58 | |
ganlikun | 0:13413ea9a877 | 59 | /** Mark the end of a critical section |
ganlikun | 0:13413ea9a877 | 60 | * |
ganlikun | 0:13413ea9a877 | 61 | */ |
ganlikun | 0:13413ea9a877 | 62 | void unlock() |
ganlikun | 0:13413ea9a877 | 63 | { |
ganlikun | 0:13413ea9a877 | 64 | core_util_critical_section_exit(); |
ganlikun | 0:13413ea9a877 | 65 | } |
ganlikun | 0:13413ea9a877 | 66 | }; |
ganlikun | 0:13413ea9a877 | 67 | |
ganlikun | 0:13413ea9a877 | 68 | |
ganlikun | 0:13413ea9a877 | 69 | } // namespace mbed |
ganlikun | 0:13413ea9a877 | 70 | |
ganlikun | 0:13413ea9a877 | 71 | #endif |
ganlikun | 0:13413ea9a877 | 72 |