Zhen Liu / mbed-rtos

Official mbed Real Time Operating System based on the RTX implementation of the CMSIS-RTOS API open standard.

Dependencies:   EthernetInterface

Dependents:   ethernet

Fork of mbed-rtos by mbed official

rtx_ca/rt_Event.c@48:e9a2c7cb57a4, 2014-11-06 (annotated)

Committer:
mbed_official
Date:
Thu Nov 06 11:00:33 2014 +0000
Revision:
48:e9a2c7cb57a4
Synchronized with git revision 8724eb616b6e07a3bd111d3022652eb5bbefe9b7



Full URL: https://github.com/mbedmicro/mbed/commit/8724eb616b6e07a3bd111d3022652eb5bbefe9b7/



[RZ/A1H] mbed-RZ first release

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 48:e9a2c7cb57a4 1 /*----------------------------------------------------------------------------
mbed_official 48:e9a2c7cb57a4 2 * RL-ARM - RTX
mbed_official 48:e9a2c7cb57a4 3 *----------------------------------------------------------------------------
mbed_official 48:e9a2c7cb57a4 4 * Name: RT_EVENT.C
mbed_official 48:e9a2c7cb57a4 5 * Purpose: Implements waits and wake-ups for event flags
mbed_official 48:e9a2c7cb57a4 6 * Rev.: V4.60
mbed_official 48:e9a2c7cb57a4 7 *----------------------------------------------------------------------------
mbed_official 48:e9a2c7cb57a4 8 *
mbed_official 48:e9a2c7cb57a4 9 * Copyright (c) 1999-2009 KEIL, 2009-2012 ARM Germany GmbH
mbed_official 48:e9a2c7cb57a4 10 * All rights reserved.
mbed_official 48:e9a2c7cb57a4 11 * Redistribution and use in source and binary forms, with or without
mbed_official 48:e9a2c7cb57a4 12 * modification, are permitted provided that the following conditions are met:
mbed_official 48:e9a2c7cb57a4 13 * - Redistributions of source code must retain the above copyright
mbed_official 48:e9a2c7cb57a4 14 * notice, this list of conditions and the following disclaimer.
mbed_official 48:e9a2c7cb57a4 15 * - Redistributions in binary form must reproduce the above copyright
mbed_official 48:e9a2c7cb57a4 16 * notice, this list of conditions and the following disclaimer in the
mbed_official 48:e9a2c7cb57a4 17 * documentation and/or other materials provided with the distribution.
mbed_official 48:e9a2c7cb57a4 18 * - Neither the name of ARM nor the names of its contributors may be used
mbed_official 48:e9a2c7cb57a4 19 * to endorse or promote products derived from this software without
mbed_official 48:e9a2c7cb57a4 20 * specific prior written permission.
mbed_official 48:e9a2c7cb57a4 21 *
mbed_official 48:e9a2c7cb57a4 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 48:e9a2c7cb57a4 23 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 48:e9a2c7cb57a4 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
mbed_official 48:e9a2c7cb57a4 25 * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
mbed_official 48:e9a2c7cb57a4 26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
mbed_official 48:e9a2c7cb57a4 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
mbed_official 48:e9a2c7cb57a4 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
mbed_official 48:e9a2c7cb57a4 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
mbed_official 48:e9a2c7cb57a4 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
mbed_official 48:e9a2c7cb57a4 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
mbed_official 48:e9a2c7cb57a4 32 * POSSIBILITY OF SUCH DAMAGE.
mbed_official 48:e9a2c7cb57a4 33 *---------------------------------------------------------------------------*/
mbed_official 48:e9a2c7cb57a4 34
mbed_official 48:e9a2c7cb57a4 35 #include "rt_TypeDef.h"
mbed_official 48:e9a2c7cb57a4 36 #include "RTX_Config.h"
mbed_official 48:e9a2c7cb57a4 37 #include "rt_System.h"
mbed_official 48:e9a2c7cb57a4 38 #include "rt_Event.h"
mbed_official 48:e9a2c7cb57a4 39 #include "rt_List.h"
mbed_official 48:e9a2c7cb57a4 40 #include "rt_Task.h"
mbed_official 48:e9a2c7cb57a4 41 #ifdef __CORTEX_A9
mbed_official 48:e9a2c7cb57a4 42 #include "rt_HAL_CA.h"
mbed_official 48:e9a2c7cb57a4 43 #else
mbed_official 48:e9a2c7cb57a4 44 #include "rt_HAL_CM.h"
mbed_official 48:e9a2c7cb57a4 45 #endif
mbed_official 48:e9a2c7cb57a4 46
mbed_official 48:e9a2c7cb57a4 47
mbed_official 48:e9a2c7cb57a4 48 /*----------------------------------------------------------------------------
mbed_official 48:e9a2c7cb57a4 49 * Functions
mbed_official 48:e9a2c7cb57a4 50 *---------------------------------------------------------------------------*/
mbed_official 48:e9a2c7cb57a4 51
mbed_official 48:e9a2c7cb57a4 52
mbed_official 48:e9a2c7cb57a4 53 /*--------------------------- rt_evt_wait -----------------------------------*/
mbed_official 48:e9a2c7cb57a4 54
mbed_official 48:e9a2c7cb57a4 55 OS_RESULT rt_evt_wait (U16 wait_flags, U16 timeout, BOOL and_wait) {
mbed_official 48:e9a2c7cb57a4 56 /* Wait for one or more event flags with optional time-out. */
mbed_official 48:e9a2c7cb57a4 57 /* "wait_flags" identifies the flags to wait for. */
mbed_official 48:e9a2c7cb57a4 58 /* "timeout" is the time-out limit in system ticks (0xffff if no time-out) */
mbed_official 48:e9a2c7cb57a4 59 /* "and_wait" specifies the AND-ing of "wait_flags" as condition to be met */
mbed_official 48:e9a2c7cb57a4 60 /* to complete the wait. (OR-ing if set to 0). */
mbed_official 48:e9a2c7cb57a4 61 U32 block_state;
mbed_official 48:e9a2c7cb57a4 62
mbed_official 48:e9a2c7cb57a4 63 if (and_wait) {
mbed_official 48:e9a2c7cb57a4 64 /* Check for AND-connected events */
mbed_official 48:e9a2c7cb57a4 65 if ((os_tsk.run->events & wait_flags) == wait_flags) {
mbed_official 48:e9a2c7cb57a4 66 os_tsk.run->events &= ~wait_flags;
mbed_official 48:e9a2c7cb57a4 67 return (OS_R_EVT);
mbed_official 48:e9a2c7cb57a4 68 }
mbed_official 48:e9a2c7cb57a4 69 block_state = WAIT_AND;
mbed_official 48:e9a2c7cb57a4 70 }
mbed_official 48:e9a2c7cb57a4 71 else {
mbed_official 48:e9a2c7cb57a4 72 /* Check for OR-connected events */
mbed_official 48:e9a2c7cb57a4 73 if (os_tsk.run->events & wait_flags) {
mbed_official 48:e9a2c7cb57a4 74 os_tsk.run->waits = os_tsk.run->events & wait_flags;
mbed_official 48:e9a2c7cb57a4 75 os_tsk.run->events &= ~wait_flags;
mbed_official 48:e9a2c7cb57a4 76 return (OS_R_EVT);
mbed_official 48:e9a2c7cb57a4 77 }
mbed_official 48:e9a2c7cb57a4 78 block_state = WAIT_OR;
mbed_official 48:e9a2c7cb57a4 79 }
mbed_official 48:e9a2c7cb57a4 80 /* Task has to wait */
mbed_official 48:e9a2c7cb57a4 81 os_tsk.run->waits = wait_flags;
mbed_official 48:e9a2c7cb57a4 82 rt_block (timeout, (U8)block_state);
mbed_official 48:e9a2c7cb57a4 83 return (OS_R_TMO);
mbed_official 48:e9a2c7cb57a4 84 }
mbed_official 48:e9a2c7cb57a4 85
mbed_official 48:e9a2c7cb57a4 86
mbed_official 48:e9a2c7cb57a4 87 /*--------------------------- rt_evt_set ------------------------------------*/
mbed_official 48:e9a2c7cb57a4 88
mbed_official 48:e9a2c7cb57a4 89 void rt_evt_set (U16 event_flags, OS_TID task_id) {
mbed_official 48:e9a2c7cb57a4 90 /* Set one or more event flags of a selectable task. */
mbed_official 48:e9a2c7cb57a4 91 P_TCB p_tcb;
mbed_official 48:e9a2c7cb57a4 92
mbed_official 48:e9a2c7cb57a4 93 p_tcb = os_active_TCB[task_id-1];
mbed_official 48:e9a2c7cb57a4 94 if (p_tcb == NULL) {
mbed_official 48:e9a2c7cb57a4 95 return;
mbed_official 48:e9a2c7cb57a4 96 }
mbed_official 48:e9a2c7cb57a4 97 p_tcb->events |= event_flags;
mbed_official 48:e9a2c7cb57a4 98 event_flags = p_tcb->waits;
mbed_official 48:e9a2c7cb57a4 99 /* If the task is not waiting for an event, it should not be put */
mbed_official 48:e9a2c7cb57a4 100 /* to ready state. */
mbed_official 48:e9a2c7cb57a4 101 if (p_tcb->state == WAIT_AND) {
mbed_official 48:e9a2c7cb57a4 102 /* Check for AND-connected events */
mbed_official 48:e9a2c7cb57a4 103 if ((p_tcb->events & event_flags) == event_flags) {
mbed_official 48:e9a2c7cb57a4 104 goto wkup;
mbed_official 48:e9a2c7cb57a4 105 }
mbed_official 48:e9a2c7cb57a4 106 }
mbed_official 48:e9a2c7cb57a4 107 if (p_tcb->state == WAIT_OR) {
mbed_official 48:e9a2c7cb57a4 108 /* Check for OR-connected events */
mbed_official 48:e9a2c7cb57a4 109 if (p_tcb->events & event_flags) {
mbed_official 48:e9a2c7cb57a4 110 p_tcb->waits &= p_tcb->events;
mbed_official 48:e9a2c7cb57a4 111 wkup: p_tcb->events &= ~event_flags;
mbed_official 48:e9a2c7cb57a4 112 rt_rmv_dly (p_tcb);
mbed_official 48:e9a2c7cb57a4 113 p_tcb->state = READY;
mbed_official 48:e9a2c7cb57a4 114 #ifdef __CMSIS_RTOS
mbed_official 48:e9a2c7cb57a4 115 rt_ret_val2(p_tcb, 0x08/*osEventSignal*/, p_tcb->waits);
mbed_official 48:e9a2c7cb57a4 116 #else
mbed_official 48:e9a2c7cb57a4 117 rt_ret_val (p_tcb, OS_R_EVT);
mbed_official 48:e9a2c7cb57a4 118 #endif
mbed_official 48:e9a2c7cb57a4 119 rt_dispatch (p_tcb);
mbed_official 48:e9a2c7cb57a4 120 }
mbed_official 48:e9a2c7cb57a4 121 }
mbed_official 48:e9a2c7cb57a4 122 }
mbed_official 48:e9a2c7cb57a4 123
mbed_official 48:e9a2c7cb57a4 124
mbed_official 48:e9a2c7cb57a4 125 /*--------------------------- rt_evt_clr ------------------------------------*/
mbed_official 48:e9a2c7cb57a4 126
mbed_official 48:e9a2c7cb57a4 127 void rt_evt_clr (U16 clear_flags, OS_TID task_id) {
mbed_official 48:e9a2c7cb57a4 128 /* Clear one or more event flags (identified by "clear_flags") of a */
mbed_official 48:e9a2c7cb57a4 129 /* selectable task (identified by "task"). */
mbed_official 48:e9a2c7cb57a4 130 P_TCB task = os_active_TCB[task_id-1];
mbed_official 48:e9a2c7cb57a4 131
mbed_official 48:e9a2c7cb57a4 132 if (task == NULL) {
mbed_official 48:e9a2c7cb57a4 133 return;
mbed_official 48:e9a2c7cb57a4 134 }
mbed_official 48:e9a2c7cb57a4 135 task->events &= ~clear_flags;
mbed_official 48:e9a2c7cb57a4 136 }
mbed_official 48:e9a2c7cb57a4 137
mbed_official 48:e9a2c7cb57a4 138
mbed_official 48:e9a2c7cb57a4 139 /*--------------------------- isr_evt_set -----------------------------------*/
mbed_official 48:e9a2c7cb57a4 140
mbed_official 48:e9a2c7cb57a4 141 void isr_evt_set (U16 event_flags, OS_TID task_id) {
mbed_official 48:e9a2c7cb57a4 142 /* Same function as "os_evt_set", but to be called by ISRs. */
mbed_official 48:e9a2c7cb57a4 143 P_TCB p_tcb = os_active_TCB[task_id-1];
mbed_official 48:e9a2c7cb57a4 144
mbed_official 48:e9a2c7cb57a4 145 if (p_tcb == NULL) {
mbed_official 48:e9a2c7cb57a4 146 return;
mbed_official 48:e9a2c7cb57a4 147 }
mbed_official 48:e9a2c7cb57a4 148 rt_psq_enq (p_tcb, event_flags);
mbed_official 48:e9a2c7cb57a4 149 rt_psh_req ();
mbed_official 48:e9a2c7cb57a4 150 }
mbed_official 48:e9a2c7cb57a4 151
mbed_official 48:e9a2c7cb57a4 152
mbed_official 48:e9a2c7cb57a4 153 /*--------------------------- rt_evt_get ------------------------------------*/
mbed_official 48:e9a2c7cb57a4 154
mbed_official 48:e9a2c7cb57a4 155 U16 rt_evt_get (void) {
mbed_official 48:e9a2c7cb57a4 156 /* Get events of a running task after waiting for OR connected events. */
mbed_official 48:e9a2c7cb57a4 157 return (os_tsk.run->waits);
mbed_official 48:e9a2c7cb57a4 158 }
mbed_official 48:e9a2c7cb57a4 159
mbed_official 48:e9a2c7cb57a4 160
mbed_official 48:e9a2c7cb57a4 161 /*--------------------------- rt_evt_psh ------------------------------------*/
mbed_official 48:e9a2c7cb57a4 162
mbed_official 48:e9a2c7cb57a4 163 void rt_evt_psh (P_TCB p_CB, U16 set_flags) {
mbed_official 48:e9a2c7cb57a4 164 /* Check if task has to be waken up */
mbed_official 48:e9a2c7cb57a4 165 U16 event_flags;
mbed_official 48:e9a2c7cb57a4 166
mbed_official 48:e9a2c7cb57a4 167 p_CB->events |= set_flags;
mbed_official 48:e9a2c7cb57a4 168 event_flags = p_CB->waits;
mbed_official 48:e9a2c7cb57a4 169 if (p_CB->state == WAIT_AND) {
mbed_official 48:e9a2c7cb57a4 170 /* Check for AND-connected events */
mbed_official 48:e9a2c7cb57a4 171 if ((p_CB->events & event_flags) == event_flags) {
mbed_official 48:e9a2c7cb57a4 172 goto rdy;
mbed_official 48:e9a2c7cb57a4 173 }
mbed_official 48:e9a2c7cb57a4 174 }
mbed_official 48:e9a2c7cb57a4 175 if (p_CB->state == WAIT_OR) {
mbed_official 48:e9a2c7cb57a4 176 /* Check for OR-connected events */
mbed_official 48:e9a2c7cb57a4 177 if (p_CB->events & event_flags) {
mbed_official 48:e9a2c7cb57a4 178 p_CB->waits &= p_CB->events;
mbed_official 48:e9a2c7cb57a4 179 rdy: p_CB->events &= ~event_flags;
mbed_official 48:e9a2c7cb57a4 180 rt_rmv_dly (p_CB);
mbed_official 48:e9a2c7cb57a4 181 p_CB->state = READY;
mbed_official 48:e9a2c7cb57a4 182 #ifdef __CMSIS_RTOS
mbed_official 48:e9a2c7cb57a4 183 rt_ret_val2(p_CB, 0x08/*osEventSignal*/, p_CB->waits);
mbed_official 48:e9a2c7cb57a4 184 #else
mbed_official 48:e9a2c7cb57a4 185 rt_ret_val (p_CB, OS_R_EVT);
mbed_official 48:e9a2c7cb57a4 186 #endif
mbed_official 48:e9a2c7cb57a4 187 rt_put_prio (&os_rdy, p_CB);
mbed_official 48:e9a2c7cb57a4 188 }
mbed_official 48:e9a2c7cb57a4 189 }
mbed_official 48:e9a2c7cb57a4 190 }
mbed_official 48:e9a2c7cb57a4 191
mbed_official 48:e9a2c7cb57a4 192 /*----------------------------------------------------------------------------
mbed_official 48:e9a2c7cb57a4 193 * end of file
mbed_official 48:e9a2c7cb57a4 194 *---------------------------------------------------------------------------*/