diff options
Diffstat (limited to 'thirdparty/nRF5_SDK_15.0.0_a53641a/components/ble/peer_manager/pm_mutex.c')
-rw-r--r-- | thirdparty/nRF5_SDK_15.0.0_a53641a/components/ble/peer_manager/pm_mutex.c | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/components/ble/peer_manager/pm_mutex.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/ble/peer_manager/pm_mutex.c new file mode 100644 index 0000000..543a99b --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/ble/peer_manager/pm_mutex.c @@ -0,0 +1,144 @@ +/** + * Copyright (c) 2015 - 2018, Nordic Semiconductor ASA + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form, except as embedded into a Nordic + * Semiconductor ASA integrated circuit in a product or a software update for + * such product, must reproduce the above copyright notice, this list of + * conditions and the following disclaimer in the documentation and/or other + * materials provided with the distribution. + * + * 3. Neither the name of Nordic Semiconductor ASA nor the names of its + * contributors may be used to endorse or promote products derived from this + * software without specific prior written permission. + * + * 4. This software, with or without modification, must only be used with a + * Nordic Semiconductor ASA integrated circuit. + * + * 5. Any software provided in binary form under this license must not be reverse + * engineered, decompiled, modified and/or disassembled. + * + * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS + * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE + * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT + * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ +#include "sdk_common.h" +#if NRF_MODULE_ENABLED(PEER_MANAGER) +#include "pm_mutex.h" + +#include <stdbool.h> +#include <string.h> +#include "nrf_error.h" +#include "app_util_platform.h" + + + +/**@brief Locks the mutex defined by the mask. + * + * @param p_mutex pointer to the mutex storage. + * @param mutex_mask the mask identifying the mutex position. + * + * @retval true if the mutex could be locked. + * @retval false if the mutex was already locked. + */ +static bool lock_by_mask(uint8_t * p_mutex, uint8_t mutex_mask) +{ + bool success = false; + + if ( (*p_mutex & mutex_mask) == 0 ) + { + CRITICAL_REGION_ENTER(); + if ( (*p_mutex & mutex_mask) == 0 ) + { + *p_mutex |= mutex_mask; + + success = true; + } + CRITICAL_REGION_EXIT(); + } + + return ( success ); +} + + +void pm_mutex_init(uint8_t * p_mutex, uint16_t mutex_size) +{ + if (p_mutex != NULL) + { + memset(&p_mutex[0], 0, MUTEX_STORAGE_SIZE(mutex_size)); + } +} + + +bool pm_mutex_lock(uint8_t * p_mutex, uint16_t mutex_id) +{ + if (p_mutex != NULL) + { + return ( lock_by_mask(&(p_mutex[mutex_id >> 3]), (1 << (mutex_id & 0x07))) ); + } + else + { + return false; + } +} + + +void pm_mutex_unlock(uint8_t * p_mutex, uint16_t mutex_id) +{ + uint8_t mutex_base = mutex_id >> 3; + uint8_t mutex_mask = (1 << (mutex_id & 0x07)); + + if ((p_mutex != NULL) + && (p_mutex[mutex_base] & mutex_mask)) + { + CRITICAL_REGION_ENTER(); + p_mutex[mutex_base] &= ~mutex_mask; + CRITICAL_REGION_EXIT(); + } +} + + +uint16_t pm_mutex_lock_first_available(uint8_t * p_mutex, uint16_t mutex_size) +{ + if (p_mutex != NULL) + { + for ( uint16_t i = 0; i < mutex_size; i++ ) + { + if ( lock_by_mask(&(p_mutex[i >> 3]), 1 << (i & 0x07)) ) + { + return ( i ); + } + } + } + + return ( mutex_size ); +} + + +bool pm_mutex_lock_status_get(uint8_t * p_mutex, uint16_t mutex_id) +{ + if (p_mutex != NULL) + { + return ( (p_mutex[mutex_id >> 3] & (1 << (mutex_id & 0x07))) ); + } + else + { + return true; + } +} +#endif // NRF_MODULE_ENABLED(PEER_MANAGER) |