Mouse code for the MacroRat
Diff: mbed-dev/targets/TARGET_NORDIC/TARGET_NRF5/nordic_critical.c
- Revision:
- 18:6a4db94011d3
diff -r f713758f6238 -r 6a4db94011d3 mbed-dev/targets/TARGET_NORDIC/TARGET_NRF5/nordic_critical.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed-dev/targets/TARGET_NORDIC/TARGET_NRF5/nordic_critical.c Sun May 14 23:18:57 2017 +0000 @@ -0,0 +1,57 @@ +/* + * Copyright (c) 2015-2016, ARM Limited, All Rights Reserved + * SPDX-License-Identifier: Apache-2.0 + * + * Licensed under the Apache License, Version 2.0 (the "License"); you may + * not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT + * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include <stdint.h> // uint32_t, UINT32_MAX +#include <assert.h> // uint32_t, UINT32_MAX +#include "cmsis.h" +#include "nrf_soc.h" +#include "nrf_sdm.h" +#include "nrf_nvic.h" + +static uint8_t _sd_state = 0; +static volatile uint32_t _entry_count = 0; + +void core_util_critical_section_enter() +{ + // if a critical section has already been entered, just update the counter + if (_entry_count) { + ++_entry_count; + return; + } + + // in this path, a critical section has never been entered + // routine of SD V11 work even if the softdevice is not active + sd_nvic_critical_region_enter(&_sd_state); + + assert(_entry_count == 0); // entry count should always be equal to 0 at this point + ++_entry_count; +} + +void core_util_critical_section_exit() +{ + assert(_entry_count > 0); + --_entry_count; + + // If their is other segments which have entered the critical section, just leave + if (_entry_count) { + return; + } + + // This is the last segment of the critical section, state should be restored as before entering + // the critical section + sd_nvic_critical_region_exit(_sd_state); +}