31 lines
850 B
C
31 lines
850 B
C
// This file is part of the CircuitPython project: https://circuitpython.org
|
|
//
|
|
// SPDX-FileCopyrightText: Copyright (c) 2021 Dan Halbert for Adafruit Industries
|
|
//
|
|
// SPDX-License-Identifier: MIT
|
|
|
|
#include "shared-bindings/microcontroller/__init__.h"
|
|
#include "supervisor/shared/lock.h"
|
|
|
|
void supervisor_acquire_lock(supervisor_lock_t *lock) {
|
|
while (!supervisor_try_lock(lock)) {
|
|
RUN_BACKGROUND_TASKS;
|
|
}
|
|
}
|
|
|
|
bool supervisor_try_lock(supervisor_lock_t *lock) {
|
|
bool grabbed_lock = false;
|
|
common_hal_mcu_disable_interrupts();
|
|
if (!*lock) {
|
|
*lock = true;
|
|
grabbed_lock = true;
|
|
}
|
|
common_hal_mcu_enable_interrupts();
|
|
return grabbed_lock;
|
|
}
|
|
|
|
void supervisor_release_lock(supervisor_lock_t *lock) {
|
|
common_hal_mcu_disable_interrupts();
|
|
*lock = false;
|
|
common_hal_mcu_enable_interrupts();
|
|
}
|