52 lines
1.9 KiB
C
52 lines
1.9 KiB
C
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/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2021 Dan Halbert for Adafruit Industries
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "shared-bindings/microcontroller/__init__.h"
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#include "supervisor/shared/lock.h"
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void supervisor_acquire_lock(supervisor_lock_t *lock) {
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while (!supervisor_try_lock(lock)) {
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RUN_BACKGROUND_TASKS;
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}
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}
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bool supervisor_try_lock(supervisor_lock_t *lock) {
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bool grabbed_lock = false;
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common_hal_mcu_disable_interrupts();
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if (!*lock) {
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*lock = true;
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grabbed_lock = true;
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}
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common_hal_mcu_enable_interrupts();
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return grabbed_lock;
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}
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void supervisor_release_lock(supervisor_lock_t *lock) {
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common_hal_mcu_disable_interrupts();
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*lock = false;
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common_hal_mcu_enable_interrupts();
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}
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