Pierre Provent / USBHost

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Dependents:   TEST_USB_Nucleo_F429ZI Essais_USB_Nucleo_F429ZI SID_V3_Nucleo_F429ZI SID_V4_Nucleo_F429ZI_copy

mbed-rtos/rtx/TARGET_ARM7/rt_Mailbox.c@0:77ca32e8e04e, 2020-09-25 (annotated)

Committer:
pierreprovent
Date:
Fri Sep 25 10:17:49 2020 +0000
Revision:
0:77ca32e8e04e
Programme acquisition en enregistrement sur clef USB carte Nucleo F429ZI cours ELE118 Cnam

Who changed what in which revision?

UserRevisionLine numberNew contents of line
pierreprovent 0:77ca32e8e04e 1 /*----------------------------------------------------------------------------
pierreprovent 0:77ca32e8e04e 2 * RL-ARM - RTX
pierreprovent 0:77ca32e8e04e 3 *----------------------------------------------------------------------------
pierreprovent 0:77ca32e8e04e 4 * Name: RT_MAILBOX.C
pierreprovent 0:77ca32e8e04e 5 * Purpose: Implements waits and wake-ups for mailbox messages
pierreprovent 0:77ca32e8e04e 6 * Rev.: V4.60
pierreprovent 0:77ca32e8e04e 7 *----------------------------------------------------------------------------
pierreprovent 0:77ca32e8e04e 8 *
pierreprovent 0:77ca32e8e04e 9 * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
pierreprovent 0:77ca32e8e04e 10 * All rights reserved.
pierreprovent 0:77ca32e8e04e 11 * Redistribution and use in source and binary forms, with or without
pierreprovent 0:77ca32e8e04e 12 * modification, are permitted provided that the following conditions are met:
pierreprovent 0:77ca32e8e04e 13 * - Redistributions of source code must retain the above copyright
pierreprovent 0:77ca32e8e04e 14 * notice, this list of conditions and the following disclaimer.
pierreprovent 0:77ca32e8e04e 15 * - Redistributions in binary form must reproduce the above copyright
pierreprovent 0:77ca32e8e04e 16 * notice, this list of conditions and the following disclaimer in the
pierreprovent 0:77ca32e8e04e 17 * documentation and/or other materials provided with the distribution.
pierreprovent 0:77ca32e8e04e 18 * - Neither the name of ARM nor the names of its contributors may be used
pierreprovent 0:77ca32e8e04e 19 * to endorse or promote products derived from this software without
pierreprovent 0:77ca32e8e04e 20 * specific prior written permission.
pierreprovent 0:77ca32e8e04e 21 *
pierreprovent 0:77ca32e8e04e 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
pierreprovent 0:77ca32e8e04e 23 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
pierreprovent 0:77ca32e8e04e 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
pierreprovent 0:77ca32e8e04e 25 * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
pierreprovent 0:77ca32e8e04e 26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
pierreprovent 0:77ca32e8e04e 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
pierreprovent 0:77ca32e8e04e 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
pierreprovent 0:77ca32e8e04e 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
pierreprovent 0:77ca32e8e04e 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
pierreprovent 0:77ca32e8e04e 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
pierreprovent 0:77ca32e8e04e 32 * POSSIBILITY OF SUCH DAMAGE.
pierreprovent 0:77ca32e8e04e 33 *---------------------------------------------------------------------------*/
pierreprovent 0:77ca32e8e04e 34
pierreprovent 0:77ca32e8e04e 35 #include "rt_TypeDef.h"
pierreprovent 0:77ca32e8e04e 36 #include "RTX_Conf.h"
pierreprovent 0:77ca32e8e04e 37 #include "rt_System.h"
pierreprovent 0:77ca32e8e04e 38 #include "rt_List.h"
pierreprovent 0:77ca32e8e04e 39 #include "rt_Mailbox.h"
pierreprovent 0:77ca32e8e04e 40 #include "rt_MemBox.h"
pierreprovent 0:77ca32e8e04e 41 #include "rt_Task.h"
pierreprovent 0:77ca32e8e04e 42 #include "rt_HAL_CM.h"
pierreprovent 0:77ca32e8e04e 43
pierreprovent 0:77ca32e8e04e 44
pierreprovent 0:77ca32e8e04e 45 /*----------------------------------------------------------------------------
pierreprovent 0:77ca32e8e04e 46 * Functions
pierreprovent 0:77ca32e8e04e 47 *---------------------------------------------------------------------------*/
pierreprovent 0:77ca32e8e04e 48
pierreprovent 0:77ca32e8e04e 49
pierreprovent 0:77ca32e8e04e 50 /*--------------------------- rt_mbx_init -----------------------------------*/
pierreprovent 0:77ca32e8e04e 51
pierreprovent 0:77ca32e8e04e 52 void rt_mbx_init (OS_ID mailbox, U16 mbx_size) {
pierreprovent 0:77ca32e8e04e 53 /* Initialize a mailbox */
pierreprovent 0:77ca32e8e04e 54 P_MCB p_MCB = mailbox;
pierreprovent 0:77ca32e8e04e 55
pierreprovent 0:77ca32e8e04e 56 p_MCB->cb_type = MCB;
pierreprovent 0:77ca32e8e04e 57 p_MCB->state = 0;
pierreprovent 0:77ca32e8e04e 58 p_MCB->isr_st = 0;
pierreprovent 0:77ca32e8e04e 59 p_MCB->p_lnk = NULL;
pierreprovent 0:77ca32e8e04e 60 p_MCB->first = 0;
pierreprovent 0:77ca32e8e04e 61 p_MCB->last = 0;
pierreprovent 0:77ca32e8e04e 62 p_MCB->count = 0;
pierreprovent 0:77ca32e8e04e 63 p_MCB->size = (mbx_size + sizeof(void *) - sizeof(struct OS_MCB)) /
pierreprovent 0:77ca32e8e04e 64 (U32)sizeof (void *);
pierreprovent 0:77ca32e8e04e 65 }
pierreprovent 0:77ca32e8e04e 66
pierreprovent 0:77ca32e8e04e 67
pierreprovent 0:77ca32e8e04e 68 /*--------------------------- rt_mbx_send -----------------------------------*/
pierreprovent 0:77ca32e8e04e 69
pierreprovent 0:77ca32e8e04e 70 OS_RESULT rt_mbx_send (OS_ID mailbox, void *p_msg, U16 timeout) {
pierreprovent 0:77ca32e8e04e 71 /* Send message to a mailbox */
pierreprovent 0:77ca32e8e04e 72 P_MCB p_MCB = mailbox;
pierreprovent 0:77ca32e8e04e 73 P_TCB p_TCB;
pierreprovent 0:77ca32e8e04e 74
pierreprovent 0:77ca32e8e04e 75 if ((p_MCB->p_lnk != NULL) && (p_MCB->state == 1)) {
pierreprovent 0:77ca32e8e04e 76 /* A task is waiting for message */
pierreprovent 0:77ca32e8e04e 77 p_TCB = rt_get_first ((P_XCB)p_MCB);
pierreprovent 0:77ca32e8e04e 78 #ifdef __CMSIS_RTOS
pierreprovent 0:77ca32e8e04e 79 rt_ret_val2(p_TCB, 0x10/*osEventMessage*/, (U32)p_msg);
pierreprovent 0:77ca32e8e04e 80 #else
pierreprovent 0:77ca32e8e04e 81 *p_TCB->msg = p_msg;
pierreprovent 0:77ca32e8e04e 82 rt_ret_val (p_TCB, OS_R_MBX);
pierreprovent 0:77ca32e8e04e 83 #endif
pierreprovent 0:77ca32e8e04e 84 rt_rmv_dly (p_TCB);
pierreprovent 0:77ca32e8e04e 85 rt_dispatch (p_TCB);
pierreprovent 0:77ca32e8e04e 86 }
pierreprovent 0:77ca32e8e04e 87 else {
pierreprovent 0:77ca32e8e04e 88 /* Store message in mailbox queue */
pierreprovent 0:77ca32e8e04e 89 if (p_MCB->count == p_MCB->size) {
pierreprovent 0:77ca32e8e04e 90 /* No free message entry, wait for one. If message queue is full, */
pierreprovent 0:77ca32e8e04e 91 /* then no task is waiting for message. The 'p_MCB->p_lnk' list */
pierreprovent 0:77ca32e8e04e 92 /* pointer can now be reused for send message waits task list. */
pierreprovent 0:77ca32e8e04e 93 if (timeout == 0) {
pierreprovent 0:77ca32e8e04e 94 return (OS_R_TMO);
pierreprovent 0:77ca32e8e04e 95 }
pierreprovent 0:77ca32e8e04e 96 if (p_MCB->p_lnk != NULL) {
pierreprovent 0:77ca32e8e04e 97 rt_put_prio ((P_XCB)p_MCB, os_tsk.run);
pierreprovent 0:77ca32e8e04e 98 }
pierreprovent 0:77ca32e8e04e 99 else {
pierreprovent 0:77ca32e8e04e 100 p_MCB->p_lnk = os_tsk.run;
pierreprovent 0:77ca32e8e04e 101 os_tsk.run->p_lnk = NULL;
pierreprovent 0:77ca32e8e04e 102 os_tsk.run->p_rlnk = (P_TCB)p_MCB;
pierreprovent 0:77ca32e8e04e 103 /* Task is waiting to send a message */
pierreprovent 0:77ca32e8e04e 104 p_MCB->state = 2;
pierreprovent 0:77ca32e8e04e 105 }
pierreprovent 0:77ca32e8e04e 106 os_tsk.run->msg = p_msg;
pierreprovent 0:77ca32e8e04e 107 rt_block (timeout, WAIT_MBX);
pierreprovent 0:77ca32e8e04e 108 return (OS_R_TMO);
pierreprovent 0:77ca32e8e04e 109 }
pierreprovent 0:77ca32e8e04e 110 /* Yes, there is a free entry in a mailbox. */
pierreprovent 0:77ca32e8e04e 111 p_MCB->msg[p_MCB->first] = p_msg;
pierreprovent 0:77ca32e8e04e 112 rt_inc (&p_MCB->count);
pierreprovent 0:77ca32e8e04e 113 if (++p_MCB->first == p_MCB->size) {
pierreprovent 0:77ca32e8e04e 114 p_MCB->first = 0;
pierreprovent 0:77ca32e8e04e 115 }
pierreprovent 0:77ca32e8e04e 116 }
pierreprovent 0:77ca32e8e04e 117 return (OS_R_OK);
pierreprovent 0:77ca32e8e04e 118 }
pierreprovent 0:77ca32e8e04e 119
pierreprovent 0:77ca32e8e04e 120
pierreprovent 0:77ca32e8e04e 121 /*--------------------------- rt_mbx_wait -----------------------------------*/
pierreprovent 0:77ca32e8e04e 122
pierreprovent 0:77ca32e8e04e 123 OS_RESULT rt_mbx_wait (OS_ID mailbox, void **message, U16 timeout) {
pierreprovent 0:77ca32e8e04e 124 /* Receive a message; possibly wait for it */
pierreprovent 0:77ca32e8e04e 125 P_MCB p_MCB = mailbox;
pierreprovent 0:77ca32e8e04e 126 P_TCB p_TCB;
pierreprovent 0:77ca32e8e04e 127
pierreprovent 0:77ca32e8e04e 128 /* If a message is available in the fifo buffer */
pierreprovent 0:77ca32e8e04e 129 /* remove it from the fifo buffer and return. */
pierreprovent 0:77ca32e8e04e 130 if (p_MCB->count) {
pierreprovent 0:77ca32e8e04e 131 *message = p_MCB->msg[p_MCB->last];
pierreprovent 0:77ca32e8e04e 132 if (++p_MCB->last == p_MCB->size) {
pierreprovent 0:77ca32e8e04e 133 p_MCB->last = 0;
pierreprovent 0:77ca32e8e04e 134 }
pierreprovent 0:77ca32e8e04e 135 if ((p_MCB->p_lnk != NULL) && (p_MCB->state == 2)) {
pierreprovent 0:77ca32e8e04e 136 /* A task is waiting to send message */
pierreprovent 0:77ca32e8e04e 137 p_TCB = rt_get_first ((P_XCB)p_MCB);
pierreprovent 0:77ca32e8e04e 138 #ifdef __CMSIS_RTOS
pierreprovent 0:77ca32e8e04e 139 rt_ret_val(p_TCB, 0/*osOK*/);
pierreprovent 0:77ca32e8e04e 140 #else
pierreprovent 0:77ca32e8e04e 141 rt_ret_val(p_TCB, OS_R_OK);
pierreprovent 0:77ca32e8e04e 142 #endif
pierreprovent 0:77ca32e8e04e 143 p_MCB->msg[p_MCB->first] = p_TCB->msg;
pierreprovent 0:77ca32e8e04e 144 if (++p_MCB->first == p_MCB->size) {
pierreprovent 0:77ca32e8e04e 145 p_MCB->first = 0;
pierreprovent 0:77ca32e8e04e 146 }
pierreprovent 0:77ca32e8e04e 147 rt_rmv_dly (p_TCB);
pierreprovent 0:77ca32e8e04e 148 rt_dispatch (p_TCB);
pierreprovent 0:77ca32e8e04e 149 }
pierreprovent 0:77ca32e8e04e 150 else {
pierreprovent 0:77ca32e8e04e 151 rt_dec (&p_MCB->count);
pierreprovent 0:77ca32e8e04e 152 }
pierreprovent 0:77ca32e8e04e 153 return (OS_R_OK);
pierreprovent 0:77ca32e8e04e 154 }
pierreprovent 0:77ca32e8e04e 155 /* No message available: wait for one */
pierreprovent 0:77ca32e8e04e 156 if (timeout == 0) {
pierreprovent 0:77ca32e8e04e 157 return (OS_R_TMO);
pierreprovent 0:77ca32e8e04e 158 }
pierreprovent 0:77ca32e8e04e 159 if (p_MCB->p_lnk != NULL) {
pierreprovent 0:77ca32e8e04e 160 rt_put_prio ((P_XCB)p_MCB, os_tsk.run);
pierreprovent 0:77ca32e8e04e 161 }
pierreprovent 0:77ca32e8e04e 162 else {
pierreprovent 0:77ca32e8e04e 163 p_MCB->p_lnk = os_tsk.run;
pierreprovent 0:77ca32e8e04e 164 os_tsk.run->p_lnk = NULL;
pierreprovent 0:77ca32e8e04e 165 os_tsk.run->p_rlnk = (P_TCB)p_MCB;
pierreprovent 0:77ca32e8e04e 166 /* Task is waiting to receive a message */
pierreprovent 0:77ca32e8e04e 167 p_MCB->state = 1;
pierreprovent 0:77ca32e8e04e 168 }
pierreprovent 0:77ca32e8e04e 169 rt_block(timeout, WAIT_MBX);
pierreprovent 0:77ca32e8e04e 170 #ifndef __CMSIS_RTOS
pierreprovent 0:77ca32e8e04e 171 os_tsk.run->msg = message;
pierreprovent 0:77ca32e8e04e 172 #endif
pierreprovent 0:77ca32e8e04e 173 return (OS_R_TMO);
pierreprovent 0:77ca32e8e04e 174 }
pierreprovent 0:77ca32e8e04e 175
pierreprovent 0:77ca32e8e04e 176
pierreprovent 0:77ca32e8e04e 177 /*--------------------------- rt_mbx_check ----------------------------------*/
pierreprovent 0:77ca32e8e04e 178
pierreprovent 0:77ca32e8e04e 179 OS_RESULT rt_mbx_check (OS_ID mailbox) {
pierreprovent 0:77ca32e8e04e 180 /* Check for free space in a mailbox. Returns the number of messages */
pierreprovent 0:77ca32e8e04e 181 /* that can be stored to a mailbox. It returns 0 when mailbox is full. */
pierreprovent 0:77ca32e8e04e 182 P_MCB p_MCB = mailbox;
pierreprovent 0:77ca32e8e04e 183
pierreprovent 0:77ca32e8e04e 184 return (p_MCB->size - p_MCB->count);
pierreprovent 0:77ca32e8e04e 185 }
pierreprovent 0:77ca32e8e04e 186
pierreprovent 0:77ca32e8e04e 187
pierreprovent 0:77ca32e8e04e 188 /*--------------------------- isr_mbx_send ----------------------------------*/
pierreprovent 0:77ca32e8e04e 189
pierreprovent 0:77ca32e8e04e 190 void isr_mbx_send (OS_ID mailbox, void *p_msg) {
pierreprovent 0:77ca32e8e04e 191 /* Same function as "os_mbx_send", but to be called by ISRs. */
pierreprovent 0:77ca32e8e04e 192 P_MCB p_MCB = mailbox;
pierreprovent 0:77ca32e8e04e 193
pierreprovent 0:77ca32e8e04e 194 rt_psq_enq (p_MCB, (U32)p_msg);
pierreprovent 0:77ca32e8e04e 195 rt_psh_req ();
pierreprovent 0:77ca32e8e04e 196 }
pierreprovent 0:77ca32e8e04e 197
pierreprovent 0:77ca32e8e04e 198
pierreprovent 0:77ca32e8e04e 199 /*--------------------------- isr_mbx_receive -------------------------------*/
pierreprovent 0:77ca32e8e04e 200
pierreprovent 0:77ca32e8e04e 201 OS_RESULT isr_mbx_receive (OS_ID mailbox, void **message) {
pierreprovent 0:77ca32e8e04e 202 /* Receive a message in the interrupt function. The interrupt function */
pierreprovent 0:77ca32e8e04e 203 /* should not wait for a message since this would block the rtx os. */
pierreprovent 0:77ca32e8e04e 204 P_MCB p_MCB = mailbox;
pierreprovent 0:77ca32e8e04e 205
pierreprovent 0:77ca32e8e04e 206 if (p_MCB->count) {
pierreprovent 0:77ca32e8e04e 207 /* A message is available in the fifo buffer. */
pierreprovent 0:77ca32e8e04e 208 *message = p_MCB->msg[p_MCB->last];
pierreprovent 0:77ca32e8e04e 209 if (p_MCB->state == 2) {
pierreprovent 0:77ca32e8e04e 210 /* A task is locked waiting to send message */
pierreprovent 0:77ca32e8e04e 211 rt_psq_enq (p_MCB, 0);
pierreprovent 0:77ca32e8e04e 212 rt_psh_req ();
pierreprovent 0:77ca32e8e04e 213 }
pierreprovent 0:77ca32e8e04e 214 rt_dec (&p_MCB->count);
pierreprovent 0:77ca32e8e04e 215 if (++p_MCB->last == p_MCB->size) {
pierreprovent 0:77ca32e8e04e 216 p_MCB->last = 0;
pierreprovent 0:77ca32e8e04e 217 }
pierreprovent 0:77ca32e8e04e 218 return (OS_R_MBX);
pierreprovent 0:77ca32e8e04e 219 }
pierreprovent 0:77ca32e8e04e 220 return (OS_R_OK);
pierreprovent 0:77ca32e8e04e 221 }
pierreprovent 0:77ca32e8e04e 222
pierreprovent 0:77ca32e8e04e 223
pierreprovent 0:77ca32e8e04e 224 /*--------------------------- rt_mbx_psh ------------------------------------*/
pierreprovent 0:77ca32e8e04e 225
pierreprovent 0:77ca32e8e04e 226 void rt_mbx_psh (P_MCB p_CB, void *p_msg) {
pierreprovent 0:77ca32e8e04e 227 /* Store the message to the mailbox queue or pass it to task directly. */
pierreprovent 0:77ca32e8e04e 228 P_TCB p_TCB;
pierreprovent 0:77ca32e8e04e 229 void *mem;
pierreprovent 0:77ca32e8e04e 230
pierreprovent 0:77ca32e8e04e 231 if (p_CB->p_lnk != NULL) switch (p_CB->state) {
pierreprovent 0:77ca32e8e04e 232 #ifdef __CMSIS_RTOS
pierreprovent 0:77ca32e8e04e 233 case 3:
pierreprovent 0:77ca32e8e04e 234 /* Task is waiting to allocate memory, remove it from the waiting list */
pierreprovent 0:77ca32e8e04e 235 mem = rt_alloc_box(p_msg);
pierreprovent 0:77ca32e8e04e 236 if (mem == NULL) break;
pierreprovent 0:77ca32e8e04e 237 p_TCB = rt_get_first ((P_XCB)p_CB);
pierreprovent 0:77ca32e8e04e 238 rt_ret_val(p_TCB, (U32)mem);
pierreprovent 0:77ca32e8e04e 239 p_TCB->state = READY;
pierreprovent 0:77ca32e8e04e 240 rt_rmv_dly (p_TCB);
pierreprovent 0:77ca32e8e04e 241 rt_put_prio (&os_rdy, p_TCB);
pierreprovent 0:77ca32e8e04e 242 break;
pierreprovent 0:77ca32e8e04e 243 #endif
pierreprovent 0:77ca32e8e04e 244 case 2:
pierreprovent 0:77ca32e8e04e 245 /* Task is waiting to send a message, remove it from the waiting list */
pierreprovent 0:77ca32e8e04e 246 p_TCB = rt_get_first ((P_XCB)p_CB);
pierreprovent 0:77ca32e8e04e 247 #ifdef __CMSIS_RTOS
pierreprovent 0:77ca32e8e04e 248 rt_ret_val(p_TCB, 0/*osOK*/);
pierreprovent 0:77ca32e8e04e 249 #else
pierreprovent 0:77ca32e8e04e 250 rt_ret_val(p_TCB, OS_R_OK);
pierreprovent 0:77ca32e8e04e 251 #endif
pierreprovent 0:77ca32e8e04e 252 p_CB->msg[p_CB->first] = p_TCB->msg;
pierreprovent 0:77ca32e8e04e 253 rt_inc (&p_CB->count);
pierreprovent 0:77ca32e8e04e 254 if (++p_CB->first == p_CB->size) {
pierreprovent 0:77ca32e8e04e 255 p_CB->first = 0;
pierreprovent 0:77ca32e8e04e 256 }
pierreprovent 0:77ca32e8e04e 257 p_TCB->state = READY;
pierreprovent 0:77ca32e8e04e 258 rt_rmv_dly (p_TCB);
pierreprovent 0:77ca32e8e04e 259 rt_put_prio (&os_rdy, p_TCB);
pierreprovent 0:77ca32e8e04e 260 break;
pierreprovent 0:77ca32e8e04e 261 case 1:
pierreprovent 0:77ca32e8e04e 262 /* Task is waiting for a message, pass the message to the task directly */
pierreprovent 0:77ca32e8e04e 263 p_TCB = rt_get_first ((P_XCB)p_CB);
pierreprovent 0:77ca32e8e04e 264 #ifdef __CMSIS_RTOS
pierreprovent 0:77ca32e8e04e 265 rt_ret_val2(p_TCB, 0x10/*osEventMessage*/, (U32)p_msg);
pierreprovent 0:77ca32e8e04e 266 #else
pierreprovent 0:77ca32e8e04e 267 *p_TCB->msg = p_msg;
pierreprovent 0:77ca32e8e04e 268 rt_ret_val (p_TCB, OS_R_MBX);
pierreprovent 0:77ca32e8e04e 269 #endif
pierreprovent 0:77ca32e8e04e 270 p_TCB->state = READY;
pierreprovent 0:77ca32e8e04e 271 rt_rmv_dly (p_TCB);
pierreprovent 0:77ca32e8e04e 272 rt_put_prio (&os_rdy, p_TCB);
pierreprovent 0:77ca32e8e04e 273 break;
pierreprovent 0:77ca32e8e04e 274 } else {
pierreprovent 0:77ca32e8e04e 275 /* No task is waiting for a message, store it to the mailbox queue */
pierreprovent 0:77ca32e8e04e 276 if (p_CB->count < p_CB->size) {
pierreprovent 0:77ca32e8e04e 277 p_CB->msg[p_CB->first] = p_msg;
pierreprovent 0:77ca32e8e04e 278 rt_inc (&p_CB->count);
pierreprovent 0:77ca32e8e04e 279 if (++p_CB->first == p_CB->size) {
pierreprovent 0:77ca32e8e04e 280 p_CB->first = 0;
pierreprovent 0:77ca32e8e04e 281 }
pierreprovent 0:77ca32e8e04e 282 }
pierreprovent 0:77ca32e8e04e 283 else {
pierreprovent 0:77ca32e8e04e 284 os_error (OS_ERR_MBX_OVF);
pierreprovent 0:77ca32e8e04e 285 }
pierreprovent 0:77ca32e8e04e 286 }
pierreprovent 0:77ca32e8e04e 287 }
pierreprovent 0:77ca32e8e04e 288
pierreprovent 0:77ca32e8e04e 289 /*----------------------------------------------------------------------------
pierreprovent 0:77ca32e8e04e 290 * end of file
pierreprovent 0:77ca32e8e04e 291 *---------------------------------------------------------------------------*/
pierreprovent 0:77ca32e8e04e 292