desp koval / mbed-rtos

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

Dependents:   Mecatro_Filtre

rtx/TARGET_ARM7/rt_Semaphore.c@0:4a2c9c1f5b9e, 2021-03-15 (annotated)

Committer:
mecatro_prod
Date:
Mon Mar 15 14:18:11 2021 +0000
Revision:
0:4a2c9c1f5b9e
Pas de changement

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mecatro_prod 0:4a2c9c1f5b9e 1 /*----------------------------------------------------------------------------
mecatro_prod 0:4a2c9c1f5b9e 2 * RL-ARM - RTX
mecatro_prod 0:4a2c9c1f5b9e 3 *----------------------------------------------------------------------------
mecatro_prod 0:4a2c9c1f5b9e 4 * Name: RT_SEMAPHORE.C
mecatro_prod 0:4a2c9c1f5b9e 5 * Purpose: Implements binary and counting semaphores
mecatro_prod 0:4a2c9c1f5b9e 6 * Rev.: V4.60
mecatro_prod 0:4a2c9c1f5b9e 7 *----------------------------------------------------------------------------
mecatro_prod 0:4a2c9c1f5b9e 8 *
mecatro_prod 0:4a2c9c1f5b9e 9 * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
mecatro_prod 0:4a2c9c1f5b9e 10 * All rights reserved.
mecatro_prod 0:4a2c9c1f5b9e 11 * Redistribution and use in source and binary forms, with or without
mecatro_prod 0:4a2c9c1f5b9e 12 * modification, are permitted provided that the following conditions are met:
mecatro_prod 0:4a2c9c1f5b9e 13 * - Redistributions of source code must retain the above copyright
mecatro_prod 0:4a2c9c1f5b9e 14 * notice, this list of conditions and the following disclaimer.
mecatro_prod 0:4a2c9c1f5b9e 15 * - Redistributions in binary form must reproduce the above copyright
mecatro_prod 0:4a2c9c1f5b9e 16 * notice, this list of conditions and the following disclaimer in the
mecatro_prod 0:4a2c9c1f5b9e 17 * documentation and/or other materials provided with the distribution.
mecatro_prod 0:4a2c9c1f5b9e 18 * - Neither the name of ARM nor the names of its contributors may be used
mecatro_prod 0:4a2c9c1f5b9e 19 * to endorse or promote products derived from this software without
mecatro_prod 0:4a2c9c1f5b9e 20 * specific prior written permission.
mecatro_prod 0:4a2c9c1f5b9e 21 *
mecatro_prod 0:4a2c9c1f5b9e 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mecatro_prod 0:4a2c9c1f5b9e 23 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mecatro_prod 0:4a2c9c1f5b9e 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
mecatro_prod 0:4a2c9c1f5b9e 25 * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
mecatro_prod 0:4a2c9c1f5b9e 26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
mecatro_prod 0:4a2c9c1f5b9e 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
mecatro_prod 0:4a2c9c1f5b9e 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
mecatro_prod 0:4a2c9c1f5b9e 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
mecatro_prod 0:4a2c9c1f5b9e 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
mecatro_prod 0:4a2c9c1f5b9e 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
mecatro_prod 0:4a2c9c1f5b9e 32 * POSSIBILITY OF SUCH DAMAGE.
mecatro_prod 0:4a2c9c1f5b9e 33 *---------------------------------------------------------------------------*/
mecatro_prod 0:4a2c9c1f5b9e 34
mecatro_prod 0:4a2c9c1f5b9e 35 #include "rt_TypeDef.h"
mecatro_prod 0:4a2c9c1f5b9e 36 #include "RTX_Conf.h"
mecatro_prod 0:4a2c9c1f5b9e 37 #include "rt_System.h"
mecatro_prod 0:4a2c9c1f5b9e 38 #include "rt_List.h"
mecatro_prod 0:4a2c9c1f5b9e 39 #include "rt_Task.h"
mecatro_prod 0:4a2c9c1f5b9e 40 #include "rt_Semaphore.h"
mecatro_prod 0:4a2c9c1f5b9e 41 #include "rt_HAL_CM.h"
mecatro_prod 0:4a2c9c1f5b9e 42
mecatro_prod 0:4a2c9c1f5b9e 43
mecatro_prod 0:4a2c9c1f5b9e 44 /*----------------------------------------------------------------------------
mecatro_prod 0:4a2c9c1f5b9e 45 * Functions
mecatro_prod 0:4a2c9c1f5b9e 46 *---------------------------------------------------------------------------*/
mecatro_prod 0:4a2c9c1f5b9e 47
mecatro_prod 0:4a2c9c1f5b9e 48
mecatro_prod 0:4a2c9c1f5b9e 49 /*--------------------------- rt_sem_init -----------------------------------*/
mecatro_prod 0:4a2c9c1f5b9e 50
mecatro_prod 0:4a2c9c1f5b9e 51 void rt_sem_init (OS_ID semaphore, U16 token_count) {
mecatro_prod 0:4a2c9c1f5b9e 52 /* Initialize a semaphore */
mecatro_prod 0:4a2c9c1f5b9e 53 P_SCB p_SCB = semaphore;
mecatro_prod 0:4a2c9c1f5b9e 54
mecatro_prod 0:4a2c9c1f5b9e 55 p_SCB->cb_type = SCB;
mecatro_prod 0:4a2c9c1f5b9e 56 p_SCB->p_lnk = NULL;
mecatro_prod 0:4a2c9c1f5b9e 57 p_SCB->tokens = token_count;
mecatro_prod 0:4a2c9c1f5b9e 58 }
mecatro_prod 0:4a2c9c1f5b9e 59
mecatro_prod 0:4a2c9c1f5b9e 60
mecatro_prod 0:4a2c9c1f5b9e 61 /*--------------------------- rt_sem_delete ---------------------------------*/
mecatro_prod 0:4a2c9c1f5b9e 62
mecatro_prod 0:4a2c9c1f5b9e 63 #ifdef __CMSIS_RTOS
mecatro_prod 0:4a2c9c1f5b9e 64 OS_RESULT rt_sem_delete (OS_ID semaphore) {
mecatro_prod 0:4a2c9c1f5b9e 65 /* Delete semaphore */
mecatro_prod 0:4a2c9c1f5b9e 66 P_SCB p_SCB = semaphore;
mecatro_prod 0:4a2c9c1f5b9e 67 P_TCB p_TCB;
mecatro_prod 0:4a2c9c1f5b9e 68
mecatro_prod 0:4a2c9c1f5b9e 69 while (p_SCB->p_lnk != NULL) {
mecatro_prod 0:4a2c9c1f5b9e 70 /* A task is waiting for token */
mecatro_prod 0:4a2c9c1f5b9e 71 p_TCB = rt_get_first ((P_XCB)p_SCB);
mecatro_prod 0:4a2c9c1f5b9e 72 rt_ret_val(p_TCB, 0);
mecatro_prod 0:4a2c9c1f5b9e 73 rt_rmv_dly(p_TCB);
mecatro_prod 0:4a2c9c1f5b9e 74 p_TCB->state = READY;
mecatro_prod 0:4a2c9c1f5b9e 75 rt_put_prio (&os_rdy, p_TCB);
mecatro_prod 0:4a2c9c1f5b9e 76 }
mecatro_prod 0:4a2c9c1f5b9e 77
mecatro_prod 0:4a2c9c1f5b9e 78 if (os_rdy.p_lnk && (os_rdy.p_lnk->prio > os_tsk.run->prio)) {
mecatro_prod 0:4a2c9c1f5b9e 79 /* preempt running task */
mecatro_prod 0:4a2c9c1f5b9e 80 rt_put_prio (&os_rdy, os_tsk.run);
mecatro_prod 0:4a2c9c1f5b9e 81 os_tsk.run->state = READY;
mecatro_prod 0:4a2c9c1f5b9e 82 rt_dispatch (NULL);
mecatro_prod 0:4a2c9c1f5b9e 83 }
mecatro_prod 0:4a2c9c1f5b9e 84
mecatro_prod 0:4a2c9c1f5b9e 85 p_SCB->cb_type = 0;
mecatro_prod 0:4a2c9c1f5b9e 86
mecatro_prod 0:4a2c9c1f5b9e 87 return (OS_R_OK);
mecatro_prod 0:4a2c9c1f5b9e 88 }
mecatro_prod 0:4a2c9c1f5b9e 89 #endif
mecatro_prod 0:4a2c9c1f5b9e 90
mecatro_prod 0:4a2c9c1f5b9e 91
mecatro_prod 0:4a2c9c1f5b9e 92 /*--------------------------- rt_sem_send -----------------------------------*/
mecatro_prod 0:4a2c9c1f5b9e 93
mecatro_prod 0:4a2c9c1f5b9e 94 OS_RESULT rt_sem_send (OS_ID semaphore) {
mecatro_prod 0:4a2c9c1f5b9e 95 /* Return a token to semaphore */
mecatro_prod 0:4a2c9c1f5b9e 96 P_SCB p_SCB = semaphore;
mecatro_prod 0:4a2c9c1f5b9e 97 P_TCB p_TCB;
mecatro_prod 0:4a2c9c1f5b9e 98
mecatro_prod 0:4a2c9c1f5b9e 99 if (p_SCB->p_lnk != NULL) {
mecatro_prod 0:4a2c9c1f5b9e 100 /* A task is waiting for token */
mecatro_prod 0:4a2c9c1f5b9e 101 p_TCB = rt_get_first ((P_XCB)p_SCB);
mecatro_prod 0:4a2c9c1f5b9e 102 #ifdef __CMSIS_RTOS
mecatro_prod 0:4a2c9c1f5b9e 103 rt_ret_val(p_TCB, 1);
mecatro_prod 0:4a2c9c1f5b9e 104 #else
mecatro_prod 0:4a2c9c1f5b9e 105 rt_ret_val(p_TCB, OS_R_SEM);
mecatro_prod 0:4a2c9c1f5b9e 106 #endif
mecatro_prod 0:4a2c9c1f5b9e 107 rt_rmv_dly (p_TCB);
mecatro_prod 0:4a2c9c1f5b9e 108 rt_dispatch (p_TCB);
mecatro_prod 0:4a2c9c1f5b9e 109 }
mecatro_prod 0:4a2c9c1f5b9e 110 else {
mecatro_prod 0:4a2c9c1f5b9e 111 /* Store token. */
mecatro_prod 0:4a2c9c1f5b9e 112 p_SCB->tokens++;
mecatro_prod 0:4a2c9c1f5b9e 113 }
mecatro_prod 0:4a2c9c1f5b9e 114 return (OS_R_OK);
mecatro_prod 0:4a2c9c1f5b9e 115 }
mecatro_prod 0:4a2c9c1f5b9e 116
mecatro_prod 0:4a2c9c1f5b9e 117
mecatro_prod 0:4a2c9c1f5b9e 118 /*--------------------------- rt_sem_wait -----------------------------------*/
mecatro_prod 0:4a2c9c1f5b9e 119
mecatro_prod 0:4a2c9c1f5b9e 120 OS_RESULT rt_sem_wait (OS_ID semaphore, U16 timeout) {
mecatro_prod 0:4a2c9c1f5b9e 121 /* Obtain a token; possibly wait for it */
mecatro_prod 0:4a2c9c1f5b9e 122 P_SCB p_SCB = semaphore;
mecatro_prod 0:4a2c9c1f5b9e 123
mecatro_prod 0:4a2c9c1f5b9e 124 if (p_SCB->tokens) {
mecatro_prod 0:4a2c9c1f5b9e 125 p_SCB->tokens--;
mecatro_prod 0:4a2c9c1f5b9e 126 return (OS_R_OK);
mecatro_prod 0:4a2c9c1f5b9e 127 }
mecatro_prod 0:4a2c9c1f5b9e 128 /* No token available: wait for one */
mecatro_prod 0:4a2c9c1f5b9e 129 if (timeout == 0) {
mecatro_prod 0:4a2c9c1f5b9e 130 return (OS_R_TMO);
mecatro_prod 0:4a2c9c1f5b9e 131 }
mecatro_prod 0:4a2c9c1f5b9e 132 if (p_SCB->p_lnk != NULL) {
mecatro_prod 0:4a2c9c1f5b9e 133 rt_put_prio ((P_XCB)p_SCB, os_tsk.run);
mecatro_prod 0:4a2c9c1f5b9e 134 }
mecatro_prod 0:4a2c9c1f5b9e 135 else {
mecatro_prod 0:4a2c9c1f5b9e 136 p_SCB->p_lnk = os_tsk.run;
mecatro_prod 0:4a2c9c1f5b9e 137 os_tsk.run->p_lnk = NULL;
mecatro_prod 0:4a2c9c1f5b9e 138 os_tsk.run->p_rlnk = (P_TCB)p_SCB;
mecatro_prod 0:4a2c9c1f5b9e 139 }
mecatro_prod 0:4a2c9c1f5b9e 140 rt_block(timeout, WAIT_SEM);
mecatro_prod 0:4a2c9c1f5b9e 141 return (OS_R_TMO);
mecatro_prod 0:4a2c9c1f5b9e 142 }
mecatro_prod 0:4a2c9c1f5b9e 143
mecatro_prod 0:4a2c9c1f5b9e 144
mecatro_prod 0:4a2c9c1f5b9e 145 /*--------------------------- isr_sem_send ----------------------------------*/
mecatro_prod 0:4a2c9c1f5b9e 146
mecatro_prod 0:4a2c9c1f5b9e 147 void isr_sem_send (OS_ID semaphore) {
mecatro_prod 0:4a2c9c1f5b9e 148 /* Same function as "os_sem"send", but to be called by ISRs */
mecatro_prod 0:4a2c9c1f5b9e 149 P_SCB p_SCB = semaphore;
mecatro_prod 0:4a2c9c1f5b9e 150
mecatro_prod 0:4a2c9c1f5b9e 151 rt_psq_enq (p_SCB, 0);
mecatro_prod 0:4a2c9c1f5b9e 152 rt_psh_req ();
mecatro_prod 0:4a2c9c1f5b9e 153 }
mecatro_prod 0:4a2c9c1f5b9e 154
mecatro_prod 0:4a2c9c1f5b9e 155
mecatro_prod 0:4a2c9c1f5b9e 156 /*--------------------------- rt_sem_psh ------------------------------------*/
mecatro_prod 0:4a2c9c1f5b9e 157
mecatro_prod 0:4a2c9c1f5b9e 158 void rt_sem_psh (P_SCB p_CB) {
mecatro_prod 0:4a2c9c1f5b9e 159 /* Check if task has to be waken up */
mecatro_prod 0:4a2c9c1f5b9e 160 P_TCB p_TCB;
mecatro_prod 0:4a2c9c1f5b9e 161
mecatro_prod 0:4a2c9c1f5b9e 162 if (p_CB->p_lnk != NULL) {
mecatro_prod 0:4a2c9c1f5b9e 163 /* A task is waiting for token */
mecatro_prod 0:4a2c9c1f5b9e 164 p_TCB = rt_get_first ((P_XCB)p_CB);
mecatro_prod 0:4a2c9c1f5b9e 165 rt_rmv_dly (p_TCB);
mecatro_prod 0:4a2c9c1f5b9e 166 p_TCB->state = READY;
mecatro_prod 0:4a2c9c1f5b9e 167 #ifdef __CMSIS_RTOS
mecatro_prod 0:4a2c9c1f5b9e 168 rt_ret_val(p_TCB, 1);
mecatro_prod 0:4a2c9c1f5b9e 169 #else
mecatro_prod 0:4a2c9c1f5b9e 170 rt_ret_val(p_TCB, OS_R_SEM);
mecatro_prod 0:4a2c9c1f5b9e 171 #endif
mecatro_prod 0:4a2c9c1f5b9e 172 rt_put_prio (&os_rdy, p_TCB);
mecatro_prod 0:4a2c9c1f5b9e 173 }
mecatro_prod 0:4a2c9c1f5b9e 174 else {
mecatro_prod 0:4a2c9c1f5b9e 175 /* Store token */
mecatro_prod 0:4a2c9c1f5b9e 176 p_CB->tokens++;
mecatro_prod 0:4a2c9c1f5b9e 177 }
mecatro_prod 0:4a2c9c1f5b9e 178 }
mecatro_prod 0:4a2c9c1f5b9e 179
mecatro_prod 0:4a2c9c1f5b9e 180 /*----------------------------------------------------------------------------
mecatro_prod 0:4a2c9c1f5b9e 181 * end of file
mecatro_prod 0:4a2c9c1f5b9e 182 *---------------------------------------------------------------------------*/
mecatro_prod 0:4a2c9c1f5b9e 183