mirror of https://github.com/ARMmbed/mbed-os.git
93 lines
2.2 KiB
C
93 lines
2.2 KiB
C
/* mbed Microcontroller Library
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* Copyright (c) 2017 ARM Limited
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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 "mbed_sleep.h"
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#include "mbed_critical.h"
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#include "sleep_api.h"
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#include "mbed_error.h"
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#include <limits.h>
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#if DEVICE_SLEEP
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// deep sleep locking counter. A target is allowed to deep sleep if counter == 0
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static uint16_t deep_sleep_lock = 0U;
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void sleep_manager_lock_deep_sleep(void)
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{
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core_util_critical_section_enter();
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if (deep_sleep_lock == USHRT_MAX) {
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core_util_critical_section_exit();
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error("Deep sleep lock would overflow (> USHRT_MAX)");
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}
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core_util_atomic_incr_u16(&deep_sleep_lock, 1);
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core_util_critical_section_exit();
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}
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void sleep_manager_unlock_deep_sleep(void)
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{
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core_util_critical_section_enter();
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if (deep_sleep_lock == 0) {
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core_util_critical_section_exit();
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error("Deep sleep lock would underflow (< 0)");
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}
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core_util_atomic_decr_u16(&deep_sleep_lock, 1);
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core_util_critical_section_exit();
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}
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bool sleep_manager_can_deep_sleep(void)
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{
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return deep_sleep_lock == 0 ? true : false;
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}
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void sleep_manager_sleep_auto(void)
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{
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core_util_critical_section_enter();
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// debug profile should keep debuggers attached, no deep sleep allowed
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#ifdef MBED_DEBUG
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hal_sleep();
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#else
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if (sleep_manager_can_deep_sleep()) {
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hal_deepsleep();
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} else {
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hal_sleep();
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}
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#endif
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core_util_critical_section_exit();
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}
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#else
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// locking is valid only if DEVICE_SLEEP is defined
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// we provide empty implementation
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void sleep_manager_lock_deep_sleep(void)
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{
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}
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void sleep_manager_unlock_deep_sleep(void)
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{
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}
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bool sleep_manager_can_deep_sleep(void)
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{
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// no sleep implemented
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return false;
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}
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#endif
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