📄 os_q.lst
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##############################################################################
# #
# IAR ARM ANSI C/C++ Compiler V4.42A/W32 KICKSTART 13/Mar/2009 16:01:02 #
# Copyright 1999-2005 IAR Systems. All rights reserved. #
# #
# Cpu mode = thumb #
# Endian = little #
# Stack alignment = 4 #
# Source file = E:\UC_OS\Micrium\Software\uCOS-II\Source\os_q.c #
# Command line = E:\UC_OS\Micrium\Software\uCOS-II\Source\os_q.c #
# -lCN E:\UC_OS\Micrium\Software\EvalBoards\ST\STM3210 #
# B-EVAL\IAR\OS-Probe\Flash\List\ -o #
# E:\UC_OS\Micrium\Software\EvalBoards\ST\STM3210B-EVA #
# L\IAR\OS-Probe\Flash\Obj\ -z6 --no_unroll #
# --no_inline --no_tbaa --no_scheduling --debug #
# --cpu_mode thumb --endian little --cpu cortex-M3 #
# --stack_align 4 -e --fpu None --dlib_config #
# "C:\Program Files\IAR Systems\Embedded Workbench #
# 4.0 Kickstart\arm\LIB\dl7mptnnl8n.h" -I #
# E:\UC_OS\Micrium\Software\EvalBoards\ST\STM3210B-EVA #
# L\IAR\OS-Probe\ -I E:\UC_OS\Micrium\Software\EvalBoa #
# rds\ST\STM3210B-EVAL\IAR\OS-Probe\..\..\..\..\..\uco #
# s-ii\ports\arm-cortex-m3\generic\iar\ -I #
# E:\UC_OS\Micrium\Software\EvalBoards\ST\STM3210B-EVA #
# L\IAR\OS-Probe\..\..\..\..\..\ucos-ii\source\ -I #
# E:\UC_OS\Micrium\Software\EvalBoards\ST\STM3210B-EVA #
# L\IAR\OS-Probe\..\..\..\..\..\uc-lib\ -I #
# E:\UC_OS\Micrium\Software\EvalBoards\ST\STM3210B-EVA #
# L\IAR\OS-Probe\..\..\..\..\..\uc-cpu\ -I #
# E:\UC_OS\Micrium\Software\EvalBoards\ST\STM3210B-EVA #
# L\IAR\OS-Probe\..\..\..\..\..\uc-cpu\ARM-Cortex-M3\I #
# AR\ -I E:\UC_OS\Micrium\Software\EvalBoards\ST\STM32 #
# 10B-EVAL\IAR\OS-Probe\..\..\..\..\..\cpu\st\stm32\in #
# c\ -I E:\UC_OS\Micrium\Software\EvalBoards\ST\STM321 #
# 0B-EVAL\IAR\OS-Probe\..\BSP\ -I #
# E:\UC_OS\Micrium\Software\EvalBoards\ST\STM3210B-EVA #
# L\IAR\OS-Probe\..\..\..\..\..\uC-Probe\Target\Commun #
# ication\Generic\RS-232\Source\ -I #
# E:\UC_OS\Micrium\Software\EvalBoards\ST\STM3210B-EVA #
# L\IAR\OS-Probe\..\..\..\..\..\uC-Probe\Target\Commun #
# ication\Generic\RS-232\Ports\ST\STM32\ -I #
# E:\UC_OS\Micrium\Software\EvalBoards\ST\STM3210B-EVA #
# L\IAR\OS-Probe\..\..\..\..\..\uC-Probe\Target\Commun #
# ication\Generic\Source\ -I #
# E:\UC_OS\Micrium\Software\EvalBoards\ST\STM3210B-EVA #
# L\IAR\OS-Probe\..\..\..\..\..\uC-Probe\Target\Plugin #
# s\uCOS-II\ -I "C:\Program Files\IAR #
# Systems\Embedded Workbench 4.0 Kickstart\arm\INC\" #
# List file = E:\UC_OS\Micrium\Software\EvalBoards\ST\STM3210B-EVA #
# L\IAR\OS-Probe\Flash\List\os_q.lst #
# Object file = E:\UC_OS\Micrium\Software\EvalBoards\ST\STM3210B-EVA #
# L\IAR\OS-Probe\Flash\Obj\os_q.r79 #
# #
# #
##############################################################################
E:\UC_OS\Micrium\Software\uCOS-II\Source\os_q.c
1 /*
2 *********************************************************************************************************
3 * uC/OS-II
4 * The Real-Time Kernel
5 * MESSAGE QUEUE MANAGEMENT
6 *
7 * (c) Copyright 1992-2007, Jean J. Labrosse, Weston, FL
8 * All Rights Reserved
9 *
10 * File : OS_Q.C
11 * By : Jean J. Labrosse
12 * Version : V2.85
13 *
14 * LICENSING TERMS:
15 * ---------------
16 * uC/OS-II is provided in source form for FREE evaluation, for educational use or for peaceful research.
17 * If you plan on using uC/OS-II in a commercial product you need to contact Micri祄 to properly license
18 * its use in your product. We provide ALL the source code for your convenience and to help you experience
19 * uC/OS-II. The fact that the source is provided does NOT mean that you can use it without paying a
20 * licensing fee.
21 *********************************************************************************************************
22 */
23
24 #ifndef OS_MASTER_FILE
25 #include <ucos_ii.h>
26 #endif
27
28 #if (OS_Q_EN > 0) && (OS_MAX_QS > 0)
29 /*
30 *********************************************************************************************************
31 * ACCEPT MESSAGE FROM QUEUE
32 *
33 * Description: This function checks the queue to see if a message is available. Unlike OSQPend(),
34 * OSQAccept() does not suspend the calling task if a message is not available.
35 *
36 * Arguments : pevent is a pointer to the event control block
37 *
38 * perr is a pointer to where an error message will be deposited. Possible error
39 * messages are:
40 *
41 * OS_ERR_NONE The call was successful and your task received a
42 * message.
43 * OS_ERR_EVENT_TYPE You didn't pass a pointer to a queue
44 * OS_ERR_PEVENT_NULL If 'pevent' is a NULL pointer
45 * OS_ERR_Q_EMPTY The queue did not contain any messages
46 *
47 * Returns : != (void *)0 is the message in the queue if one is available. The message is removed
48 * from the so the next time OSQAccept() is called, the queue will contain
49 * one less entry.
50 * == (void *)0 if you received a NULL pointer message
51 * if the queue is empty or,
52 * if 'pevent' is a NULL pointer or,
53 * if you passed an invalid event type
54 *
55 * Note(s) : As of V2.60, you can now pass NULL pointers through queues. Because of this, the argument
56 * 'perr' has been added to the API to tell you about the outcome of the call.
57 *********************************************************************************************************
58 */
59
60 #if OS_Q_ACCEPT_EN > 0
\ In segment CODE, align 4, keep-with-next
61 void *OSQAccept (OS_EVENT *pevent, INT8U *perr)
62 {
\ OSQAccept:
\ 00000000 70B5 PUSH {R4-R6,LR}
\ 00000002 0500 MOVS R5,R0
\ 00000004 0C00 MOVS R4,R1
63 void *pmsg;
64 OS_Q *pq;
65 #if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
66 OS_CPU_SR cpu_sr = 0;
67 #endif
68
69
70
71 #if OS_ARG_CHK_EN > 0
72 if (perr == (INT8U *)0) { /* Validate 'perr' */
\ 00000006 01D1 BNE.N ??OSQAccept_0
73 return ((void *)0);
\ ??OSQAccept_1:
\ 00000008 0020 MOVS R0,#+0
\ 0000000A 70BD POP {R4-R6,PC}
74 }
75 if (pevent == (OS_EVENT *)0) { /* Validate 'pevent' */
\ ??OSQAccept_0:
\ 0000000C 002D CMP R5,#+0
\ 0000000E 02D1 BNE.N ??OSQAccept_2
76 *perr = OS_ERR_PEVENT_NULL;
\ 00000010 0420 MOVS R0,#+4
\ 00000012 2070 STRB R0,[R4, #+0]
\ 00000014 F8E7 B.N ??OSQAccept_1
77 return ((void *)0);
78 }
79 #endif
80 if (pevent->OSEventType != OS_EVENT_TYPE_Q) {/* Validate event block type */
\ ??OSQAccept_2:
\ 00000016 2878 LDRB R0,[R5, #+0]
\ 00000018 0228 CMP R0,#+2
\ 0000001A 02D0 BEQ.N ??OSQAccept_3
81 *perr = OS_ERR_EVENT_TYPE;
\ 0000001C 0120 MOVS R0,#+1
\ 0000001E 2070 STRB R0,[R4, #+0]
\ 00000020 F2E7 B.N ??OSQAccept_1
82 return ((void *)0);
83 }
84 OS_ENTER_CRITICAL();
\ ??OSQAccept_3:
\ 00000022 ........ _BLF OS_CPU_SR_Save,??OS_CPU_SR_Save??rT
85 pq = (OS_Q *)pevent->OSEventPtr; /* Point at queue control block */
\ 00000026 6968 LDR R1,[R5, #+4]
86 if (pq->OSQEntries > 0) { /* See if any messages in the queue */
\ 00000028 0022 MOVS R2,#+0
\ 0000002A CB8A LDRH R3,[R1, #+22]
\ 0000002C 002B CMP R3,#+0
\ 0000002E 0FD0 BEQ.N ??OSQAccept_4
87 pmsg = *pq->OSQOut++; /* Yes, extract oldest message from the queue */
\ 00000030 0B69 LDR R3,[R1, #+16]
\ 00000032 1D00 MOVS R5,R3
\ 00000034 2D1D ADDS R5,R5,#+4
\ 00000036 0D61 STR R5,[R1, #+16]
\ 00000038 1D68 LDR R5,[R3, #+0]
88 pq->OSQEntries--; /* Update the number of entries in the queue */
\ 0000003A CB8A LDRH R3,[R1, #+22]
\ 0000003C 5B1E SUBS R3,R3,#+1
\ 0000003E CB82 STRH R3,[R1, #+22]
89 if (pq->OSQOut == pq->OSQEnd) { /* Wrap OUT pointer if we are at the end of the queue */
\ 00000040 0B69 LDR R3,[R1, #+16]
\ 00000042 8E68 LDR R6,[R1, #+8]
\ 00000044 B342 CMP R3,R6
\ 00000046 01D1 BNE.N ??OSQAccept_5
90 pq->OSQOut = pq->OSQStart;
\ 00000048 4B68 LDR R3,[R1, #+4]
\ 0000004A 0B61 STR R3,[R1, #+16]
91 }
92 *perr = OS_ERR_NONE;
\ ??OSQAccept_5:
\ 0000004C 2270 STRB R2,[R4, #+0]
\ 0000004E 02E0 B.N ??OSQAccept_6
93 } else {
94 *perr = OS_ERR_Q_EMPTY;
\ ??OSQAccept_4:
\ 00000050 1F21 MOVS R1,#+31
\ 00000052 2170 STRB R1,[R4, #+0]
95 pmsg = (void *)0; /* Queue is empty */
\ 00000054 1500 MOVS R5,R2
96 }
97 OS_EXIT_CRITICAL();
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