Thomas Butler
cvb
Fork of
nrf51-sdk
by 
Lancaster University
source/nordic_sdk/components/ble/peer_manager/pm_mutex.c@9:d3dd910b0f4b, 2018-08-14 (annotated)
- Committer:
- tb942
- Date:
- Tue Aug 14 18:27:20 2018 +0000
- Revision:
- 9:d3dd910b0f4b
- Parent:
- 0:bc2961fa1ef0
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| Jonathan Austin |
0:bc2961fa1ef0 | 1 | /* |
| Jonathan Austin |
0:bc2961fa1ef0 | 2 | * Copyright (c) Nordic Semiconductor ASA |
| Jonathan Austin |
0:bc2961fa1ef0 | 3 | * All rights reserved. |
| Jonathan Austin |
0:bc2961fa1ef0 | 4 | * |
| Jonathan Austin |
0:bc2961fa1ef0 | 5 | * Redistribution and use in source and binary forms, with or without modification, |
| Jonathan Austin |
0:bc2961fa1ef0 | 6 | * are permitted provided that the following conditions are met: |
| Jonathan Austin |
0:bc2961fa1ef0 | 7 | * |
| Jonathan Austin |
0:bc2961fa1ef0 | 8 | * 1. Redistributions of source code must retain the above copyright notice, this |
| Jonathan Austin |
0:bc2961fa1ef0 | 9 | * list of conditions and the following disclaimer. |
| Jonathan Austin |
0:bc2961fa1ef0 | 10 | * |
| Jonathan Austin |
0:bc2961fa1ef0 | 11 | * 2. Redistributions in binary form must reproduce the above copyright notice, this |
| Jonathan Austin |
0:bc2961fa1ef0 | 12 | * list of conditions and the following disclaimer in the documentation and/or |
| Jonathan Austin |
0:bc2961fa1ef0 | 13 | * other materials provided with the distribution. |
| Jonathan Austin |
0:bc2961fa1ef0 | 14 | * |
| Jonathan Austin |
0:bc2961fa1ef0 | 15 | * 3. Neither the name of Nordic Semiconductor ASA nor the names of other |
| Jonathan Austin |
0:bc2961fa1ef0 | 16 | * contributors to this software may be used to endorse or promote products |
| Jonathan Austin |
0:bc2961fa1ef0 | 17 | * derived from this software without specific prior written permission. |
| Jonathan Austin |
0:bc2961fa1ef0 | 18 | * |
| Jonathan Austin |
0:bc2961fa1ef0 | 19 | * |
| Jonathan Austin |
0:bc2961fa1ef0 | 20 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND |
| Jonathan Austin |
0:bc2961fa1ef0 | 21 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| Jonathan Austin |
0:bc2961fa1ef0 | 22 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| Jonathan Austin |
0:bc2961fa1ef0 | 23 | * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR |
| Jonathan Austin |
0:bc2961fa1ef0 | 24 | * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| Jonathan Austin |
0:bc2961fa1ef0 | 25 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| Jonathan Austin |
0:bc2961fa1ef0 | 26 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON |
| Jonathan Austin |
0:bc2961fa1ef0 | 27 | * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| Jonathan Austin |
0:bc2961fa1ef0 | 28 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| Jonathan Austin |
0:bc2961fa1ef0 | 29 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| Jonathan Austin |
0:bc2961fa1ef0 | 30 | * |
| Jonathan Austin |
0:bc2961fa1ef0 | 31 | */ |
| Jonathan Austin |
0:bc2961fa1ef0 | 32 | |
| Jonathan Austin |
0:bc2961fa1ef0 | 33 | |
| Jonathan Austin |
0:bc2961fa1ef0 | 34 | #include "pm_mutex.h" |
| Jonathan Austin |
0:bc2961fa1ef0 | 35 | |
| Jonathan Austin |
0:bc2961fa1ef0 | 36 | #include <stdbool.h> |
| Jonathan Austin |
0:bc2961fa1ef0 | 37 | #include <string.h> |
| Jonathan Austin |
0:bc2961fa1ef0 | 38 | #include "nrf_error.h" |
| Jonathan Austin |
0:bc2961fa1ef0 | 39 | #include "app_util_platform.h" |
| Jonathan Austin |
0:bc2961fa1ef0 | 40 | |
| Jonathan Austin |
0:bc2961fa1ef0 | 41 | |
| Jonathan Austin |
0:bc2961fa1ef0 | 42 | |
| Jonathan Austin |
0:bc2961fa1ef0 | 43 | /**@brief Locks the mutex defined by the mask. |
| Jonathan Austin |
0:bc2961fa1ef0 | 44 | * |
| Jonathan Austin |
0:bc2961fa1ef0 | 45 | * @param p_mutex pointer to the mutex storage. |
| Jonathan Austin |
0:bc2961fa1ef0 | 46 | * @param mutex_mask the mask identifying the mutex position. |
| Jonathan Austin |
0:bc2961fa1ef0 | 47 | * |
| Jonathan Austin |
0:bc2961fa1ef0 | 48 | * @retval true if the mutex could be locked. |
| Jonathan Austin |
0:bc2961fa1ef0 | 49 | * @retval false if the mutex was already locked. |
| Jonathan Austin |
0:bc2961fa1ef0 | 50 | */ |
| Jonathan Austin |
0:bc2961fa1ef0 | 51 | static bool lock_by_mask(uint8_t * p_mutex, uint8_t mutex_mask) |
| Jonathan Austin |
0:bc2961fa1ef0 | 52 | { |
| Jonathan Austin |
0:bc2961fa1ef0 | 53 | bool success = false; |
| Jonathan Austin |
0:bc2961fa1ef0 | 54 | |
| Jonathan Austin |
0:bc2961fa1ef0 | 55 | if ( (*p_mutex & mutex_mask) == 0 ) |
| Jonathan Austin |
0:bc2961fa1ef0 | 56 | { |
| Jonathan Austin |
0:bc2961fa1ef0 | 57 | CRITICAL_REGION_ENTER(); |
| Jonathan Austin |
0:bc2961fa1ef0 | 58 | if ( (*p_mutex & mutex_mask) == 0 ) |
| Jonathan Austin |
0:bc2961fa1ef0 | 59 | { |
| Jonathan Austin |
0:bc2961fa1ef0 | 60 | *p_mutex |= mutex_mask; |
| Jonathan Austin |
0:bc2961fa1ef0 | 61 | |
| Jonathan Austin |
0:bc2961fa1ef0 | 62 | success = true; |
| Jonathan Austin |
0:bc2961fa1ef0 | 63 | } |
| Jonathan Austin |
0:bc2961fa1ef0 | 64 | CRITICAL_REGION_EXIT(); |
| Jonathan Austin |
0:bc2961fa1ef0 | 65 | } |
| Jonathan Austin |
0:bc2961fa1ef0 | 66 | |
| Jonathan Austin |
0:bc2961fa1ef0 | 67 | return ( success ); |
| Jonathan Austin |
0:bc2961fa1ef0 | 68 | } |
| Jonathan Austin |
0:bc2961fa1ef0 | 69 | |
| Jonathan Austin |
0:bc2961fa1ef0 | 70 | |
| Jonathan Austin |
0:bc2961fa1ef0 | 71 | void pm_mutex_init(uint8_t * p_mutex, uint16_t mutex_size) |
| Jonathan Austin |
0:bc2961fa1ef0 | 72 | { |
| Jonathan Austin |
0:bc2961fa1ef0 | 73 | if (p_mutex != NULL) |
| Jonathan Austin |
0:bc2961fa1ef0 | 74 | { |
| Jonathan Austin |
0:bc2961fa1ef0 | 75 | memset(&p_mutex[0], 0, MUTEX_STORAGE_SIZE(mutex_size)); |
| Jonathan Austin |
0:bc2961fa1ef0 | 76 | } |
| Jonathan Austin |
0:bc2961fa1ef0 | 77 | } |
| Jonathan Austin |
0:bc2961fa1ef0 | 78 | |
| Jonathan Austin |
0:bc2961fa1ef0 | 79 | |
| Jonathan Austin |
0:bc2961fa1ef0 | 80 | bool pm_mutex_lock(uint8_t * p_mutex, uint16_t mutex_id) |
| Jonathan Austin |
0:bc2961fa1ef0 | 81 | { |
| Jonathan Austin |
0:bc2961fa1ef0 | 82 | if (p_mutex != NULL) |
| Jonathan Austin |
0:bc2961fa1ef0 | 83 | { |
| Jonathan Austin |
0:bc2961fa1ef0 | 84 | return ( lock_by_mask(&(p_mutex[mutex_id >> 3]), (1 << (mutex_id & 0x07))) ); |
| Jonathan Austin |
0:bc2961fa1ef0 | 85 | } |
| Jonathan Austin |
0:bc2961fa1ef0 | 86 | else |
| Jonathan Austin |
0:bc2961fa1ef0 | 87 | { |
| Jonathan Austin |
0:bc2961fa1ef0 | 88 | return false; |
| Jonathan Austin |
0:bc2961fa1ef0 | 89 | } |
| Jonathan Austin |
0:bc2961fa1ef0 | 90 | } |
| Jonathan Austin |
0:bc2961fa1ef0 | 91 | |
| Jonathan Austin |
0:bc2961fa1ef0 | 92 | |
| Jonathan Austin |
0:bc2961fa1ef0 | 93 | void pm_mutex_unlock(uint8_t * p_mutex, uint16_t mutex_id) |
| Jonathan Austin |
0:bc2961fa1ef0 | 94 | { |
| Jonathan Austin |
0:bc2961fa1ef0 | 95 | uint8_t mutex_base = mutex_id >> 3; |
| Jonathan Austin |
0:bc2961fa1ef0 | 96 | uint8_t mutex_mask = (1 << (mutex_id & 0x07)); |
| Jonathan Austin |
0:bc2961fa1ef0 | 97 | |
| Jonathan Austin |
0:bc2961fa1ef0 | 98 | if ((p_mutex != NULL) |
| Jonathan Austin |
0:bc2961fa1ef0 | 99 | && (p_mutex[mutex_base] & mutex_mask)) |
| Jonathan Austin |
0:bc2961fa1ef0 | 100 | { |
| Jonathan Austin |
0:bc2961fa1ef0 | 101 | CRITICAL_REGION_ENTER(); |
| Jonathan Austin |
0:bc2961fa1ef0 | 102 | p_mutex[mutex_base] &= ~mutex_mask; |
| Jonathan Austin |
0:bc2961fa1ef0 | 103 | CRITICAL_REGION_EXIT(); |
| Jonathan Austin |
0:bc2961fa1ef0 | 104 | } |
| Jonathan Austin |
0:bc2961fa1ef0 | 105 | } |
| Jonathan Austin |
0:bc2961fa1ef0 | 106 | |
| Jonathan Austin |
0:bc2961fa1ef0 | 107 | |
| Jonathan Austin |
0:bc2961fa1ef0 | 108 | uint16_t pm_mutex_lock_first_available(uint8_t * p_mutex, uint16_t mutex_size) |
| Jonathan Austin |
0:bc2961fa1ef0 | 109 | { |
| Jonathan Austin |
0:bc2961fa1ef0 | 110 | if (p_mutex != NULL) |
| Jonathan Austin |
0:bc2961fa1ef0 | 111 | { |
| Jonathan Austin |
0:bc2961fa1ef0 | 112 | for ( uint16_t i = 0; i < mutex_size; i++ ) |
| Jonathan Austin |
0:bc2961fa1ef0 | 113 | { |
| Jonathan Austin |
0:bc2961fa1ef0 | 114 | if ( lock_by_mask(&(p_mutex[i >> 3]), 1 << (i & 0x07)) ) |
| Jonathan Austin |
0:bc2961fa1ef0 | 115 | { |
| Jonathan Austin |
0:bc2961fa1ef0 | 116 | return ( i ); |
| Jonathan Austin |
0:bc2961fa1ef0 | 117 | } |
| Jonathan Austin |
0:bc2961fa1ef0 | 118 | } |
| Jonathan Austin |
0:bc2961fa1ef0 | 119 | } |
| Jonathan Austin |
0:bc2961fa1ef0 | 120 | |
| Jonathan Austin |
0:bc2961fa1ef0 | 121 | return ( mutex_size ); |
| Jonathan Austin |
0:bc2961fa1ef0 | 122 | } |
| Jonathan Austin |
0:bc2961fa1ef0 | 123 | |
| Jonathan Austin |
0:bc2961fa1ef0 | 124 | |
| Jonathan Austin |
0:bc2961fa1ef0 | 125 | bool pm_mutex_lock_status_get(uint8_t * p_mutex, uint16_t mutex_id) |
| Jonathan Austin |
0:bc2961fa1ef0 | 126 | { |
| Jonathan Austin |
0:bc2961fa1ef0 | 127 | if (p_mutex != NULL) |
| Jonathan Austin |
0:bc2961fa1ef0 | 128 | { |
| Jonathan Austin |
0:bc2961fa1ef0 | 129 | return ( (p_mutex[mutex_id >> 3] & (1 << (mutex_id & 0x07))) ); |
| Jonathan Austin |
0:bc2961fa1ef0 | 130 | } |
| Jonathan Austin |
0:bc2961fa1ef0 | 131 | else |
| Jonathan Austin |
0:bc2961fa1ef0 | 132 | { |
| Jonathan Austin |
0:bc2961fa1ef0 | 133 | return true; |
| Jonathan Austin |
0:bc2961fa1ef0 | 134 | } |
| Jonathan Austin |
0:bc2961fa1ef0 | 135 | } |