test
Fork of nRF51822 by
source/nordic-sdk/components/libraries/scheduler/app_scheduler.c@372:758e9a3a346a, 2015-07-06 (annotated)
- Committer:
- rgrover1
- Date:
- Mon Jul 06 10:21:00 2015 +0100
- Revision:
- 372:758e9a3a346a
- Parent:
- nordic-sdk/components/libraries/scheduler/app_scheduler.c@371:8f7d2137727a
Synchronized with git rev 488e2462
Author: James Crosby
restructure to yotta module, with a few tweaks to get things building
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
rgrover1 | 371:8f7d2137727a | 1 | /* |
rgrover1 | 371:8f7d2137727a | 2 | * Copyright (c) Nordic Semiconductor ASA |
rgrover1 | 371:8f7d2137727a | 3 | * All rights reserved. |
rgrover1 | 371:8f7d2137727a | 4 | * |
rgrover1 | 371:8f7d2137727a | 5 | * Redistribution and use in source and binary forms, with or without modification, |
rgrover1 | 371:8f7d2137727a | 6 | * are permitted provided that the following conditions are met: |
rgrover1 | 371:8f7d2137727a | 7 | * |
rgrover1 | 371:8f7d2137727a | 8 | * 1. Redistributions of source code must retain the above copyright notice, this |
rgrover1 | 371:8f7d2137727a | 9 | * list of conditions and the following disclaimer. |
rgrover1 | 371:8f7d2137727a | 10 | * |
rgrover1 | 371:8f7d2137727a | 11 | * 2. Redistributions in binary form must reproduce the above copyright notice, this |
rgrover1 | 371:8f7d2137727a | 12 | * list of conditions and the following disclaimer in the documentation and/or |
rgrover1 | 371:8f7d2137727a | 13 | * other materials provided with the distribution. |
rgrover1 | 371:8f7d2137727a | 14 | * |
rgrover1 | 371:8f7d2137727a | 15 | * 3. Neither the name of Nordic Semiconductor ASA nor the names of other |
rgrover1 | 371:8f7d2137727a | 16 | * contributors to this software may be used to endorse or promote products |
rgrover1 | 371:8f7d2137727a | 17 | * derived from this software without specific prior written permission. |
rgrover1 | 371:8f7d2137727a | 18 | * |
rgrover1 | 371:8f7d2137727a | 19 | * |
rgrover1 | 371:8f7d2137727a | 20 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND |
rgrover1 | 371:8f7d2137727a | 21 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
rgrover1 | 371:8f7d2137727a | 22 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
rgrover1 | 371:8f7d2137727a | 23 | * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR |
rgrover1 | 371:8f7d2137727a | 24 | * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
rgrover1 | 371:8f7d2137727a | 25 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
rgrover1 | 371:8f7d2137727a | 26 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON |
rgrover1 | 371:8f7d2137727a | 27 | * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
rgrover1 | 371:8f7d2137727a | 28 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
rgrover1 | 371:8f7d2137727a | 29 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
rgrover1 | 371:8f7d2137727a | 30 | * |
rgrover1 | 371:8f7d2137727a | 31 | */ |
rgrover1 | 371:8f7d2137727a | 32 | |
rgrover1 | 371:8f7d2137727a | 33 | #include "app_scheduler.h" |
rgrover1 | 371:8f7d2137727a | 34 | #include <stdlib.h> |
rgrover1 | 371:8f7d2137727a | 35 | #include <stdint.h> |
rgrover1 | 371:8f7d2137727a | 36 | #include <string.h> |
rgrover1 | 371:8f7d2137727a | 37 | #include "nrf_soc.h" |
rgrover1 | 371:8f7d2137727a | 38 | #include "nrf_assert.h" |
rgrover1 | 371:8f7d2137727a | 39 | #include "app_util.h" |
rgrover1 | 371:8f7d2137727a | 40 | #include "app_util_platform.h" |
rgrover1 | 371:8f7d2137727a | 41 | |
rgrover1 | 371:8f7d2137727a | 42 | /**@brief Structure for holding a scheduled event header. */ |
rgrover1 | 371:8f7d2137727a | 43 | typedef struct |
rgrover1 | 371:8f7d2137727a | 44 | { |
rgrover1 | 371:8f7d2137727a | 45 | app_sched_event_handler_t handler; /**< Pointer to event handler to receive the event. */ |
rgrover1 | 371:8f7d2137727a | 46 | uint16_t event_data_size; /**< Size of event data. */ |
rgrover1 | 371:8f7d2137727a | 47 | } event_header_t; |
rgrover1 | 371:8f7d2137727a | 48 | |
rgrover1 | 371:8f7d2137727a | 49 | STATIC_ASSERT(sizeof(event_header_t) <= APP_SCHED_EVENT_HEADER_SIZE); |
rgrover1 | 371:8f7d2137727a | 50 | |
rgrover1 | 371:8f7d2137727a | 51 | static event_header_t * m_queue_event_headers; /**< Array for holding the queue event headers. */ |
rgrover1 | 371:8f7d2137727a | 52 | static uint8_t * m_queue_event_data; /**< Array for holding the queue event data. */ |
rgrover1 | 371:8f7d2137727a | 53 | static volatile uint8_t m_queue_start_index; /**< Index of queue entry at the start of the queue. */ |
rgrover1 | 371:8f7d2137727a | 54 | static volatile uint8_t m_queue_end_index; /**< Index of queue entry at the end of the queue. */ |
rgrover1 | 371:8f7d2137727a | 55 | static uint16_t m_queue_event_size; /**< Maximum event size in queue. */ |
rgrover1 | 371:8f7d2137727a | 56 | static uint16_t m_queue_size; /**< Number of queue entries. */ |
rgrover1 | 371:8f7d2137727a | 57 | |
rgrover1 | 371:8f7d2137727a | 58 | /**@brief Function for incrementing a queue index, and handle wrap-around. |
rgrover1 | 371:8f7d2137727a | 59 | * |
rgrover1 | 371:8f7d2137727a | 60 | * @param[in] index Old index. |
rgrover1 | 371:8f7d2137727a | 61 | * |
rgrover1 | 371:8f7d2137727a | 62 | * @return New (incremented) index. |
rgrover1 | 371:8f7d2137727a | 63 | */ |
rgrover1 | 371:8f7d2137727a | 64 | static __INLINE uint8_t next_index(uint8_t index) |
rgrover1 | 371:8f7d2137727a | 65 | { |
rgrover1 | 371:8f7d2137727a | 66 | return (index < m_queue_size) ? (index + 1) : 0; |
rgrover1 | 371:8f7d2137727a | 67 | } |
rgrover1 | 371:8f7d2137727a | 68 | |
rgrover1 | 371:8f7d2137727a | 69 | |
rgrover1 | 371:8f7d2137727a | 70 | static __INLINE uint8_t app_sched_queue_full() |
rgrover1 | 371:8f7d2137727a | 71 | { |
rgrover1 | 371:8f7d2137727a | 72 | uint8_t tmp = m_queue_start_index; |
rgrover1 | 371:8f7d2137727a | 73 | return next_index(m_queue_end_index) == tmp; |
rgrover1 | 371:8f7d2137727a | 74 | } |
rgrover1 | 371:8f7d2137727a | 75 | |
rgrover1 | 371:8f7d2137727a | 76 | /**@brief Macro for checking if a queue is full. */ |
rgrover1 | 371:8f7d2137727a | 77 | #define APP_SCHED_QUEUE_FULL() app_sched_queue_full() |
rgrover1 | 371:8f7d2137727a | 78 | |
rgrover1 | 371:8f7d2137727a | 79 | |
rgrover1 | 371:8f7d2137727a | 80 | static __INLINE uint8_t app_sched_queue_empty() |
rgrover1 | 371:8f7d2137727a | 81 | { |
rgrover1 | 371:8f7d2137727a | 82 | uint8_t tmp = m_queue_start_index; |
rgrover1 | 371:8f7d2137727a | 83 | return m_queue_end_index == tmp; |
rgrover1 | 371:8f7d2137727a | 84 | } |
rgrover1 | 371:8f7d2137727a | 85 | |
rgrover1 | 371:8f7d2137727a | 86 | /**@brief Macro for checking if a queue is empty. */ |
rgrover1 | 371:8f7d2137727a | 87 | #define APP_SCHED_QUEUE_EMPTY() app_sched_queue_empty() |
rgrover1 | 371:8f7d2137727a | 88 | |
rgrover1 | 371:8f7d2137727a | 89 | |
rgrover1 | 371:8f7d2137727a | 90 | uint32_t app_sched_init(uint16_t event_size, uint16_t queue_size, void * p_event_buffer) |
rgrover1 | 371:8f7d2137727a | 91 | { |
rgrover1 | 371:8f7d2137727a | 92 | uint16_t data_start_index = (queue_size + 1) * sizeof(event_header_t); |
rgrover1 | 371:8f7d2137727a | 93 | |
rgrover1 | 371:8f7d2137727a | 94 | // Check that buffer is correctly aligned |
rgrover1 | 371:8f7d2137727a | 95 | if (!is_word_aligned(p_event_buffer)) |
rgrover1 | 371:8f7d2137727a | 96 | { |
rgrover1 | 371:8f7d2137727a | 97 | return NRF_ERROR_INVALID_PARAM; |
rgrover1 | 371:8f7d2137727a | 98 | } |
rgrover1 | 371:8f7d2137727a | 99 | |
rgrover1 | 371:8f7d2137727a | 100 | // Initialize event scheduler |
rgrover1 | 371:8f7d2137727a | 101 | m_queue_event_headers = p_event_buffer; |
rgrover1 | 371:8f7d2137727a | 102 | m_queue_event_data = &((uint8_t *)p_event_buffer)[data_start_index]; |
rgrover1 | 371:8f7d2137727a | 103 | m_queue_end_index = 0; |
rgrover1 | 371:8f7d2137727a | 104 | m_queue_start_index = 0; |
rgrover1 | 371:8f7d2137727a | 105 | m_queue_event_size = event_size; |
rgrover1 | 371:8f7d2137727a | 106 | m_queue_size = queue_size; |
rgrover1 | 371:8f7d2137727a | 107 | |
rgrover1 | 371:8f7d2137727a | 108 | return NRF_SUCCESS; |
rgrover1 | 371:8f7d2137727a | 109 | } |
rgrover1 | 371:8f7d2137727a | 110 | |
rgrover1 | 371:8f7d2137727a | 111 | |
rgrover1 | 371:8f7d2137727a | 112 | uint32_t app_sched_event_put(void * p_event_data, |
rgrover1 | 371:8f7d2137727a | 113 | uint16_t event_data_size, |
rgrover1 | 371:8f7d2137727a | 114 | app_sched_event_handler_t handler) |
rgrover1 | 371:8f7d2137727a | 115 | { |
rgrover1 | 371:8f7d2137727a | 116 | uint32_t err_code; |
rgrover1 | 371:8f7d2137727a | 117 | |
rgrover1 | 371:8f7d2137727a | 118 | if (event_data_size <= m_queue_event_size) |
rgrover1 | 371:8f7d2137727a | 119 | { |
rgrover1 | 371:8f7d2137727a | 120 | uint16_t event_index = 0xFFFF; |
rgrover1 | 371:8f7d2137727a | 121 | |
rgrover1 | 371:8f7d2137727a | 122 | CRITICAL_REGION_ENTER(); |
rgrover1 | 371:8f7d2137727a | 123 | |
rgrover1 | 371:8f7d2137727a | 124 | if (!APP_SCHED_QUEUE_FULL()) |
rgrover1 | 371:8f7d2137727a | 125 | { |
rgrover1 | 371:8f7d2137727a | 126 | event_index = m_queue_end_index; |
rgrover1 | 371:8f7d2137727a | 127 | m_queue_end_index = next_index(m_queue_end_index); |
rgrover1 | 371:8f7d2137727a | 128 | } |
rgrover1 | 371:8f7d2137727a | 129 | |
rgrover1 | 371:8f7d2137727a | 130 | CRITICAL_REGION_EXIT(); |
rgrover1 | 371:8f7d2137727a | 131 | |
rgrover1 | 371:8f7d2137727a | 132 | if (event_index != 0xFFFF) |
rgrover1 | 371:8f7d2137727a | 133 | { |
rgrover1 | 371:8f7d2137727a | 134 | // NOTE: This can be done outside the critical region since the event consumer will |
rgrover1 | 371:8f7d2137727a | 135 | // always be called from the main loop, and will thus never interrupt this code. |
rgrover1 | 371:8f7d2137727a | 136 | m_queue_event_headers[event_index].handler = handler; |
rgrover1 | 371:8f7d2137727a | 137 | if ((p_event_data != NULL) && (event_data_size > 0)) |
rgrover1 | 371:8f7d2137727a | 138 | { |
rgrover1 | 371:8f7d2137727a | 139 | memcpy(&m_queue_event_data[event_index * m_queue_event_size], |
rgrover1 | 371:8f7d2137727a | 140 | p_event_data, |
rgrover1 | 371:8f7d2137727a | 141 | event_data_size); |
rgrover1 | 371:8f7d2137727a | 142 | m_queue_event_headers[event_index].event_data_size = event_data_size; |
rgrover1 | 371:8f7d2137727a | 143 | } |
rgrover1 | 371:8f7d2137727a | 144 | else |
rgrover1 | 371:8f7d2137727a | 145 | { |
rgrover1 | 371:8f7d2137727a | 146 | m_queue_event_headers[event_index].event_data_size = 0; |
rgrover1 | 371:8f7d2137727a | 147 | } |
rgrover1 | 371:8f7d2137727a | 148 | |
rgrover1 | 371:8f7d2137727a | 149 | err_code = NRF_SUCCESS; |
rgrover1 | 371:8f7d2137727a | 150 | } |
rgrover1 | 371:8f7d2137727a | 151 | else |
rgrover1 | 371:8f7d2137727a | 152 | { |
rgrover1 | 371:8f7d2137727a | 153 | err_code = NRF_ERROR_NO_MEM; |
rgrover1 | 371:8f7d2137727a | 154 | } |
rgrover1 | 371:8f7d2137727a | 155 | } |
rgrover1 | 371:8f7d2137727a | 156 | else |
rgrover1 | 371:8f7d2137727a | 157 | { |
rgrover1 | 371:8f7d2137727a | 158 | err_code = NRF_ERROR_INVALID_LENGTH; |
rgrover1 | 371:8f7d2137727a | 159 | } |
rgrover1 | 371:8f7d2137727a | 160 | |
rgrover1 | 371:8f7d2137727a | 161 | return err_code; |
rgrover1 | 371:8f7d2137727a | 162 | } |
rgrover1 | 371:8f7d2137727a | 163 | |
rgrover1 | 371:8f7d2137727a | 164 | |
rgrover1 | 371:8f7d2137727a | 165 | /**@brief Function for reading the next event from specified event queue. |
rgrover1 | 371:8f7d2137727a | 166 | * |
rgrover1 | 371:8f7d2137727a | 167 | * @param[out] pp_event_data Pointer to pointer to event data. |
rgrover1 | 371:8f7d2137727a | 168 | * @param[out] p_event_data_size Pointer to size of event data. |
rgrover1 | 371:8f7d2137727a | 169 | * @param[out] p_event_handler Pointer to event handler function pointer. |
rgrover1 | 371:8f7d2137727a | 170 | * |
rgrover1 | 371:8f7d2137727a | 171 | * @return NRF_SUCCESS if new event, NRF_ERROR_NOT_FOUND if event queue is empty. |
rgrover1 | 371:8f7d2137727a | 172 | */ |
rgrover1 | 371:8f7d2137727a | 173 | static uint32_t app_sched_event_get(void ** pp_event_data, |
rgrover1 | 371:8f7d2137727a | 174 | uint16_t * p_event_data_size, |
rgrover1 | 371:8f7d2137727a | 175 | app_sched_event_handler_t * p_event_handler) |
rgrover1 | 371:8f7d2137727a | 176 | { |
rgrover1 | 371:8f7d2137727a | 177 | uint32_t err_code = NRF_ERROR_NOT_FOUND; |
rgrover1 | 371:8f7d2137727a | 178 | |
rgrover1 | 371:8f7d2137727a | 179 | if (!APP_SCHED_QUEUE_EMPTY()) |
rgrover1 | 371:8f7d2137727a | 180 | { |
rgrover1 | 371:8f7d2137727a | 181 | uint16_t event_index; |
rgrover1 | 371:8f7d2137727a | 182 | |
rgrover1 | 371:8f7d2137727a | 183 | // NOTE: There is no need for a critical region here, as this function will only be called |
rgrover1 | 371:8f7d2137727a | 184 | // from app_sched_execute() from inside the main loop, so it will never interrupt |
rgrover1 | 371:8f7d2137727a | 185 | // app_sched_event_put(). Also, updating of (i.e. writing to) the start index will be |
rgrover1 | 371:8f7d2137727a | 186 | // an atomic operation. |
rgrover1 | 371:8f7d2137727a | 187 | event_index = m_queue_start_index; |
rgrover1 | 371:8f7d2137727a | 188 | m_queue_start_index = next_index(m_queue_start_index); |
rgrover1 | 371:8f7d2137727a | 189 | |
rgrover1 | 371:8f7d2137727a | 190 | *pp_event_data = &m_queue_event_data[event_index * m_queue_event_size]; |
rgrover1 | 371:8f7d2137727a | 191 | *p_event_data_size = m_queue_event_headers[event_index].event_data_size; |
rgrover1 | 371:8f7d2137727a | 192 | *p_event_handler = m_queue_event_headers[event_index].handler; |
rgrover1 | 371:8f7d2137727a | 193 | |
rgrover1 | 371:8f7d2137727a | 194 | err_code = NRF_SUCCESS; |
rgrover1 | 371:8f7d2137727a | 195 | } |
rgrover1 | 371:8f7d2137727a | 196 | |
rgrover1 | 371:8f7d2137727a | 197 | return err_code; |
rgrover1 | 371:8f7d2137727a | 198 | } |
rgrover1 | 371:8f7d2137727a | 199 | |
rgrover1 | 371:8f7d2137727a | 200 | |
rgrover1 | 371:8f7d2137727a | 201 | void app_sched_execute(void) |
rgrover1 | 371:8f7d2137727a | 202 | { |
rgrover1 | 371:8f7d2137727a | 203 | void * p_event_data; |
rgrover1 | 371:8f7d2137727a | 204 | uint16_t event_data_size; |
rgrover1 | 371:8f7d2137727a | 205 | app_sched_event_handler_t event_handler; |
rgrover1 | 371:8f7d2137727a | 206 | |
rgrover1 | 371:8f7d2137727a | 207 | // Get next event (if any), and execute handler |
rgrover1 | 371:8f7d2137727a | 208 | while ((app_sched_event_get(&p_event_data, &event_data_size, &event_handler) == NRF_SUCCESS)) |
rgrover1 | 371:8f7d2137727a | 209 | { |
rgrover1 | 371:8f7d2137727a | 210 | event_handler(p_event_data, event_data_size); |
rgrover1 | 371:8f7d2137727a | 211 | } |
rgrover1 | 371:8f7d2137727a | 212 | } |