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63 lines
1.7 KiB
C++
63 lines
1.7 KiB
C++
/* mbed Microcontroller Library
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* Copyright (c) 2017-2019 ARM Limited
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* SPDX-License-Identifier: Apache-2.0
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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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#include "platform/DeepSleepLock.h"
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#include "platform/mbed_atomic.h"
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#include "platform/mbed_critical.h"
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#include "platform/mbed_error.h"
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#include "platform/mbed_power_mgmt.h"
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namespace mbed {
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DeepSleepLock::DeepSleepLock(): _lock_count(1)
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{
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sleep_manager_lock_deep_sleep();
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}
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DeepSleepLock::~DeepSleepLock()
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{
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if (_lock_count) {
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sleep_manager_unlock_deep_sleep();
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}
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}
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void DeepSleepLock::lock()
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{
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uint16_t count = core_util_atomic_incr_u16(&_lock_count, 1);
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if (1 == count) {
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sleep_manager_lock_deep_sleep();
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}
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if (0 == count) {
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MBED_ERROR1(MBED_MAKE_ERROR(MBED_MODULE_PLATFORM, MBED_ERROR_CODE_OVERFLOW), "DeepSleepLock overflow (> USHRT_MAX)", count);
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}
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}
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void DeepSleepLock::unlock()
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{
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uint16_t count = core_util_atomic_decr_u16(&_lock_count, 1);
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if (count == 0) {
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sleep_manager_unlock_deep_sleep();
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}
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if (count == USHRT_MAX) {
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core_util_critical_section_exit();
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MBED_ERROR1(MBED_MAKE_ERROR(MBED_MODULE_PLATFORM, MBED_ERROR_CODE_UNDERFLOW), "DeepSleepLock underflow (< 0)", count);
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}
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}
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} // namespace mbed
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