Michael Kersh / Mbed 2 deprecated ECE4180EthernetTest

Ethernet test for ECE 4180 and others to find your IP address and do a simple HTTP GET request over port 80.

Dependencies:   mbed Socket lwip-eth lwip-sys lwip

mbed-rtos/rtx/rt_Mutex.c@0:e7ca326e76ee, 2013-04-04 (annotated)

Committer:
mkersh3
Date:
Thu Apr 04 05:26:09 2013 +0000
Revision:
0:e7ca326e76ee
Ethernet Test for ECE4180 and others to find their IP Address and do a simple HTTP GET request over port 80.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mkersh3 0:e7ca326e76ee 1 /*----------------------------------------------------------------------------
mkersh3 0:e7ca326e76ee 2 * RL-ARM - RTX
mkersh3 0:e7ca326e76ee 3 *----------------------------------------------------------------------------
mkersh3 0:e7ca326e76ee 4 * Name: RT_MUTEX.C
mkersh3 0:e7ca326e76ee 5 * Purpose: Implements mutex synchronization objects
mkersh3 0:e7ca326e76ee 6 * Rev.: V4.50
mkersh3 0:e7ca326e76ee 7 *----------------------------------------------------------------------------
mkersh3 0:e7ca326e76ee 8 *
mkersh3 0:e7ca326e76ee 9 * Copyright (c) 1999-2009 KEIL, 2009-2012 ARM Germany GmbH
mkersh3 0:e7ca326e76ee 10 * All rights reserved.
mkersh3 0:e7ca326e76ee 11 * Redistribution and use in source and binary forms, with or without
mkersh3 0:e7ca326e76ee 12 * modification, are permitted provided that the following conditions are met:
mkersh3 0:e7ca326e76ee 13 * - Redistributions of source code must retain the above copyright
mkersh3 0:e7ca326e76ee 14 * notice, this list of conditions and the following disclaimer.
mkersh3 0:e7ca326e76ee 15 * - Redistributions in binary form must reproduce the above copyright
mkersh3 0:e7ca326e76ee 16 * notice, this list of conditions and the following disclaimer in the
mkersh3 0:e7ca326e76ee 17 * documentation and/or other materials provided with the distribution.
mkersh3 0:e7ca326e76ee 18 * - Neither the name of ARM nor the names of its contributors may be used
mkersh3 0:e7ca326e76ee 19 * to endorse or promote products derived from this software without
mkersh3 0:e7ca326e76ee 20 * specific prior written permission.
mkersh3 0:e7ca326e76ee 21 *
mkersh3 0:e7ca326e76ee 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mkersh3 0:e7ca326e76ee 23 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mkersh3 0:e7ca326e76ee 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
mkersh3 0:e7ca326e76ee 25 * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
mkersh3 0:e7ca326e76ee 26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
mkersh3 0:e7ca326e76ee 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
mkersh3 0:e7ca326e76ee 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
mkersh3 0:e7ca326e76ee 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
mkersh3 0:e7ca326e76ee 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
mkersh3 0:e7ca326e76ee 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
mkersh3 0:e7ca326e76ee 32 * POSSIBILITY OF SUCH DAMAGE.
mkersh3 0:e7ca326e76ee 33 *---------------------------------------------------------------------------*/
mkersh3 0:e7ca326e76ee 34
mkersh3 0:e7ca326e76ee 35 #include "rt_TypeDef.h"
mkersh3 0:e7ca326e76ee 36 #include "RTX_Config.h"
mkersh3 0:e7ca326e76ee 37 #include "rt_List.h"
mkersh3 0:e7ca326e76ee 38 #include "rt_Task.h"
mkersh3 0:e7ca326e76ee 39 #include "rt_Mutex.h"
mkersh3 0:e7ca326e76ee 40 #include "rt_HAL_CM.h"
mkersh3 0:e7ca326e76ee 41
mkersh3 0:e7ca326e76ee 42
mkersh3 0:e7ca326e76ee 43 /*----------------------------------------------------------------------------
mkersh3 0:e7ca326e76ee 44 * Functions
mkersh3 0:e7ca326e76ee 45 *---------------------------------------------------------------------------*/
mkersh3 0:e7ca326e76ee 46
mkersh3 0:e7ca326e76ee 47
mkersh3 0:e7ca326e76ee 48 /*--------------------------- rt_mut_init -----------------------------------*/
mkersh3 0:e7ca326e76ee 49
mkersh3 0:e7ca326e76ee 50 void rt_mut_init (OS_ID mutex) {
mkersh3 0:e7ca326e76ee 51 /* Initialize a mutex object */
mkersh3 0:e7ca326e76ee 52 P_MUCB p_MCB = mutex;
mkersh3 0:e7ca326e76ee 53
mkersh3 0:e7ca326e76ee 54 p_MCB->cb_type = MUCB;
mkersh3 0:e7ca326e76ee 55 p_MCB->prio = 0;
mkersh3 0:e7ca326e76ee 56 p_MCB->level = 0;
mkersh3 0:e7ca326e76ee 57 p_MCB->p_lnk = NULL;
mkersh3 0:e7ca326e76ee 58 p_MCB->owner = NULL;
mkersh3 0:e7ca326e76ee 59 }
mkersh3 0:e7ca326e76ee 60
mkersh3 0:e7ca326e76ee 61
mkersh3 0:e7ca326e76ee 62 /*--------------------------- rt_mut_delete ---------------------------------*/
mkersh3 0:e7ca326e76ee 63 OS_RESULT rt_mut_delete (OS_ID mutex) {
mkersh3 0:e7ca326e76ee 64 /* Delete a mutex object */
mkersh3 0:e7ca326e76ee 65 P_MUCB p_MCB = mutex;
mkersh3 0:e7ca326e76ee 66 P_TCB p_TCB;
mkersh3 0:e7ca326e76ee 67
mkersh3 0:e7ca326e76ee 68 /* Restore owner task's priority. */
mkersh3 0:e7ca326e76ee 69 if (p_MCB->level != 0) {
mkersh3 0:e7ca326e76ee 70 p_MCB->owner->prio = p_MCB->prio;
mkersh3 0:e7ca326e76ee 71 if (p_MCB->owner != os_tsk.run) {
mkersh3 0:e7ca326e76ee 72 rt_resort_prio (p_MCB->owner);
mkersh3 0:e7ca326e76ee 73 }
mkersh3 0:e7ca326e76ee 74 }
mkersh3 0:e7ca326e76ee 75
mkersh3 0:e7ca326e76ee 76 while (p_MCB->p_lnk != NULL) {
mkersh3 0:e7ca326e76ee 77 /* A task is waiting for mutex. */
mkersh3 0:e7ca326e76ee 78 p_TCB = rt_get_first ((P_XCB)p_MCB);
mkersh3 0:e7ca326e76ee 79 rt_ret_val(p_TCB, 0/*osOK*/);
mkersh3 0:e7ca326e76ee 80 rt_rmv_dly(p_TCB);
mkersh3 0:e7ca326e76ee 81 p_TCB->state = READY;
mkersh3 0:e7ca326e76ee 82 rt_put_prio (&os_rdy, p_TCB);
mkersh3 0:e7ca326e76ee 83 }
mkersh3 0:e7ca326e76ee 84
mkersh3 0:e7ca326e76ee 85 if (os_rdy.p_lnk && (os_rdy.p_lnk->prio > os_tsk.run->prio)) {
mkersh3 0:e7ca326e76ee 86 /* preempt running task */
mkersh3 0:e7ca326e76ee 87 rt_put_prio (&os_rdy, os_tsk.run);
mkersh3 0:e7ca326e76ee 88 os_tsk.run->state = READY;
mkersh3 0:e7ca326e76ee 89 rt_dispatch (NULL);
mkersh3 0:e7ca326e76ee 90 }
mkersh3 0:e7ca326e76ee 91
mkersh3 0:e7ca326e76ee 92 p_MCB->cb_type = 0;
mkersh3 0:e7ca326e76ee 93
mkersh3 0:e7ca326e76ee 94 return (OS_R_OK);
mkersh3 0:e7ca326e76ee 95 }
mkersh3 0:e7ca326e76ee 96
mkersh3 0:e7ca326e76ee 97 /*--------------------------- rt_mut_release --------------------------------*/
mkersh3 0:e7ca326e76ee 98
mkersh3 0:e7ca326e76ee 99 OS_RESULT rt_mut_release (OS_ID mutex) {
mkersh3 0:e7ca326e76ee 100 /* Release a mutex object */
mkersh3 0:e7ca326e76ee 101 P_MUCB p_MCB = mutex;
mkersh3 0:e7ca326e76ee 102 P_TCB p_TCB;
mkersh3 0:e7ca326e76ee 103
mkersh3 0:e7ca326e76ee 104 if (p_MCB->level == 0 || p_MCB->owner != os_tsk.run) {
mkersh3 0:e7ca326e76ee 105 /* Unbalanced mutex release or task is not the owner */
mkersh3 0:e7ca326e76ee 106 return (OS_R_NOK);
mkersh3 0:e7ca326e76ee 107 }
mkersh3 0:e7ca326e76ee 108 if (--p_MCB->level != 0) {
mkersh3 0:e7ca326e76ee 109 return (OS_R_OK);
mkersh3 0:e7ca326e76ee 110 }
mkersh3 0:e7ca326e76ee 111 /* Restore owner task's priority. */
mkersh3 0:e7ca326e76ee 112 os_tsk.run->prio = p_MCB->prio;
mkersh3 0:e7ca326e76ee 113 if (p_MCB->p_lnk != NULL) {
mkersh3 0:e7ca326e76ee 114 /* A task is waiting for mutex. */
mkersh3 0:e7ca326e76ee 115 p_TCB = rt_get_first ((P_XCB)p_MCB);
mkersh3 0:e7ca326e76ee 116 rt_ret_val(p_TCB, 0/*osOK*/);
mkersh3 0:e7ca326e76ee 117 rt_rmv_dly (p_TCB);
mkersh3 0:e7ca326e76ee 118 /* A waiting task becomes the owner of this mutex. */
mkersh3 0:e7ca326e76ee 119 p_MCB->level = 1;
mkersh3 0:e7ca326e76ee 120 p_MCB->owner = p_TCB;
mkersh3 0:e7ca326e76ee 121 p_MCB->prio = p_TCB->prio;
mkersh3 0:e7ca326e76ee 122 /* Priority inversion, check which task continues. */
mkersh3 0:e7ca326e76ee 123 if (os_tsk.run->prio >= rt_rdy_prio()) {
mkersh3 0:e7ca326e76ee 124 rt_dispatch (p_TCB);
mkersh3 0:e7ca326e76ee 125 }
mkersh3 0:e7ca326e76ee 126 else {
mkersh3 0:e7ca326e76ee 127 /* Ready task has higher priority than running task. */
mkersh3 0:e7ca326e76ee 128 rt_put_prio (&os_rdy, os_tsk.run);
mkersh3 0:e7ca326e76ee 129 rt_put_prio (&os_rdy, p_TCB);
mkersh3 0:e7ca326e76ee 130 os_tsk.run->state = READY;
mkersh3 0:e7ca326e76ee 131 p_TCB->state = READY;
mkersh3 0:e7ca326e76ee 132 rt_dispatch (NULL);
mkersh3 0:e7ca326e76ee 133 }
mkersh3 0:e7ca326e76ee 134 }
mkersh3 0:e7ca326e76ee 135 else {
mkersh3 0:e7ca326e76ee 136 /* Check if own priority raised by priority inversion. */
mkersh3 0:e7ca326e76ee 137 if (rt_rdy_prio() > os_tsk.run->prio) {
mkersh3 0:e7ca326e76ee 138 rt_put_prio (&os_rdy, os_tsk.run);
mkersh3 0:e7ca326e76ee 139 os_tsk.run->state = READY;
mkersh3 0:e7ca326e76ee 140 rt_dispatch (NULL);
mkersh3 0:e7ca326e76ee 141 }
mkersh3 0:e7ca326e76ee 142 }
mkersh3 0:e7ca326e76ee 143 return (OS_R_OK);
mkersh3 0:e7ca326e76ee 144 }
mkersh3 0:e7ca326e76ee 145
mkersh3 0:e7ca326e76ee 146
mkersh3 0:e7ca326e76ee 147 /*--------------------------- rt_mut_wait -----------------------------------*/
mkersh3 0:e7ca326e76ee 148
mkersh3 0:e7ca326e76ee 149 OS_RESULT rt_mut_wait (OS_ID mutex, U16 timeout) {
mkersh3 0:e7ca326e76ee 150 /* Wait for a mutex, continue when mutex is free. */
mkersh3 0:e7ca326e76ee 151 P_MUCB p_MCB = mutex;
mkersh3 0:e7ca326e76ee 152
mkersh3 0:e7ca326e76ee 153 if (p_MCB->level == 0) {
mkersh3 0:e7ca326e76ee 154 p_MCB->owner = os_tsk.run;
mkersh3 0:e7ca326e76ee 155 p_MCB->prio = os_tsk.run->prio;
mkersh3 0:e7ca326e76ee 156 goto inc;
mkersh3 0:e7ca326e76ee 157 }
mkersh3 0:e7ca326e76ee 158 if (p_MCB->owner == os_tsk.run) {
mkersh3 0:e7ca326e76ee 159 /* OK, running task is the owner of this mutex. */
mkersh3 0:e7ca326e76ee 160 inc:p_MCB->level++;
mkersh3 0:e7ca326e76ee 161 return (OS_R_OK);
mkersh3 0:e7ca326e76ee 162 }
mkersh3 0:e7ca326e76ee 163 /* Mutex owned by another task, wait until released. */
mkersh3 0:e7ca326e76ee 164 if (timeout == 0) {
mkersh3 0:e7ca326e76ee 165 return (OS_R_TMO);
mkersh3 0:e7ca326e76ee 166 }
mkersh3 0:e7ca326e76ee 167 /* Raise the owner task priority if lower than current priority. */
mkersh3 0:e7ca326e76ee 168 /* This priority inversion is called priority inheritance. */
mkersh3 0:e7ca326e76ee 169 if (p_MCB->prio < os_tsk.run->prio) {
mkersh3 0:e7ca326e76ee 170 p_MCB->owner->prio = os_tsk.run->prio;
mkersh3 0:e7ca326e76ee 171 rt_resort_prio (p_MCB->owner);
mkersh3 0:e7ca326e76ee 172 }
mkersh3 0:e7ca326e76ee 173 if (p_MCB->p_lnk != NULL) {
mkersh3 0:e7ca326e76ee 174 rt_put_prio ((P_XCB)p_MCB, os_tsk.run);
mkersh3 0:e7ca326e76ee 175 }
mkersh3 0:e7ca326e76ee 176 else {
mkersh3 0:e7ca326e76ee 177 p_MCB->p_lnk = os_tsk.run;
mkersh3 0:e7ca326e76ee 178 os_tsk.run->p_lnk = NULL;
mkersh3 0:e7ca326e76ee 179 os_tsk.run->p_rlnk = (P_TCB)p_MCB;
mkersh3 0:e7ca326e76ee 180 }
mkersh3 0:e7ca326e76ee 181 rt_block(timeout, WAIT_MUT);
mkersh3 0:e7ca326e76ee 182 return (OS_R_TMO);
mkersh3 0:e7ca326e76ee 183 }
mkersh3 0:e7ca326e76ee 184
mkersh3 0:e7ca326e76ee 185
mkersh3 0:e7ca326e76ee 186 /*----------------------------------------------------------------------------
mkersh3 0:e7ca326e76ee 187 * end of file
mkersh3 0:e7ca326e76ee 188 *---------------------------------------------------------------------------*/
mkersh3 0:e7ca326e76ee 189