📄 os_mutex.lst
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###############################################################################
# #
# IAR ANSI C/C++ Compiler V6.10.2.52244/W32 for ARM 07/Aug/2011 12:10:29 #
# Copyright 1999-2010 IAR Systems AB. #
# #
# Cpu mode = thumb #
# Endian = little #
# Source file = F:\stm32\我的程序\Micrium\Software\uCOS-II\Source\os_mut #
# ex.c #
# Command line = F:\stm32\我的程序\Micrium\Software\uCOS-II\Source\os_mut #
# ex.c -D USE_STDPERIPH_DRIVER -D STM32F10X_CL -lCN #
# F:\stm32\我的程序\Micrium\Software\EWARM\OS-II\Flash\Lis #
# t\ -o F:\stm32\我的程序\Micrium\Software\EWARM\OS-II\Fla #
# sh\Obj\ --no_cse --no_unroll --no_inline #
# --no_code_motion --no_tbaa --no_clustering #
# --no_scheduling --debug --endian=little --cpu=Cortex-M3 #
# -e --fpu=None --dlib_config #
# D:\arm\INC\c\DLib_Config_Normal.h -I #
# F:\stm32\我的程序\Micrium\Software\EWARM\OS-II\APP\ -I #
# F:\stm32\我的程序\Micrium\Software\EWARM\OS-II\..\BSP\ #
# -I F:\stm32\我的程序\Micrium\Software\EWARM\OS-II\..\BSP #
# \ST\CMSIS\CM3\CoreSupport\ -I #
# F:\stm32\我的程序\Micrium\Software\EWARM\OS-II\..\BSP\ST #
# \CMSIS\CM3\DeviceSupport\ST\STM32F10x\ -I #
# F:\stm32\我的程序\Micrium\Software\EWARM\OS-II\..\BSP\ST #
# \STM32F10x_StdPeriph_Driver\inc\ -I #
# F:\stm32\我的程序\Micrium\Software\EWARM\OS-II\..\BSP\uC #
# OS-II\ -I F:\stm32\我的程序\Micrium\Software\EWARM\OS-II #
# \..\..\uCOS-II\Ports\ARM-Cortex-M3\Generic\IAR\ -I #
# F:\stm32\我的程序\Micrium\Software\EWARM\OS-II\..\..\uCO #
# S-II\Source\ -I F:\stm32\我的程序\Micrium\Software\EWARM #
# \OS-II\..\..\uC-LIB\ -I F:\stm32\我的程序\Micrium\Softwa #
# re\EWARM\OS-II\..\..\uC-LIB\Ports\ARM-Cortex-M3\IAR\ -I #
# F:\stm32\我的程序\Micrium\Software\EWARM\OS-II\..\..\uC- #
# CPU\ -I F:\stm32\我的程序\Micrium\Software\EWARM\OS-II\. #
# .\..\uC-CPU\ARM-Cortex-M3\IAR\ -On --use_c++_inline #
# List file = F:\stm32\我的程序\Micrium\Software\EWARM\OS-II\Flash\Lis #
# t\os_mutex.lst #
# Object file = F:\stm32\我的程序\Micrium\Software\EWARM\OS-II\Flash\Obj #
# \os_mutex.o #
# #
# #
###############################################################################
F:\stm32\我的程序\Micrium\Software\uCOS-II\Source\os_mutex.c
1 /*
2 *********************************************************************************************************
3 * uC/OS-II
4 * The Real-Time Kernel
5 * MUTUAL EXCLUSION SEMAPHORE MANAGEMENT
6 *
7 * (c) Copyright 1992-2010, Micrium, Weston, FL
8 * All Rights Reserved
9 *
10 * File : OS_MUTEX.C
11 * By : Jean J. Labrosse
12 * Version : V2.92
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
29 #if OS_MUTEX_EN > 0u
30 /*
31 *********************************************************************************************************
32 * LOCAL CONSTANTS
33 *********************************************************************************************************
34 */
35
36 #define OS_MUTEX_KEEP_LOWER_8 ((INT16U)0x00FFu)
37 #define OS_MUTEX_KEEP_UPPER_8 ((INT16U)0xFF00u)
38
39 #define OS_MUTEX_AVAILABLE ((INT16U)0x00FFu)
40
41 /*
42 *********************************************************************************************************
43 * LOCAL CONSTANTS
44 *********************************************************************************************************
45 */
46
47 static void OSMutex_RdyAtPrio(OS_TCB *ptcb, INT8U prio);
48
49 /*$PAGE*/
50 /*
51 *********************************************************************************************************
52 * ACCEPT MUTUAL EXCLUSION SEMAPHORE
53 *
54 * Description: This function checks the mutual exclusion semaphore to see if a resource is available.
55 * Unlike OSMutexPend(), OSMutexAccept() does not suspend the calling task if the resource is
56 * not available or the event did not occur.
57 *
58 * Arguments : pevent is a pointer to the event control block
59 *
60 * perr is a pointer to an error code which will be returned to your application:
61 * OS_ERR_NONE if the call was successful.
62 * OS_ERR_EVENT_TYPE if 'pevent' is not a pointer to a mutex
63 * OS_ERR_PEVENT_NULL 'pevent' is a NULL pointer
64 * OS_ERR_PEND_ISR if you called this function from an ISR
65 * OS_ERR_PCP_LOWER If the priority of the task that owns the Mutex is
66 * HIGHER (i.e. a lower number) than the PCP. This error
67 * indicates that you did not set the PCP higher (lower
68 * number) than ALL the tasks that compete for the Mutex.
69 * Unfortunately, this is something that could not be
70 * detected when the Mutex is created because we don't know
71 * what tasks will be using the Mutex.
72 *
73 * Returns : == OS_TRUE if the resource is available, the mutual exclusion semaphore is acquired
74 * == OS_FALSE a) if the resource is not available
75 * b) you didn't pass a pointer to a mutual exclusion semaphore
76 * c) you called this function from an ISR
77 *
78 * Warning(s) : This function CANNOT be called from an ISR because mutual exclusion semaphores are
79 * intended to be used by tasks only.
80 *********************************************************************************************************
81 */
82
83 #if OS_MUTEX_ACCEPT_EN > 0u
\ In section .text, align 2, keep-with-next
84 BOOLEAN OSMutexAccept (OS_EVENT *pevent,
85 INT8U *perr)
86 {
\ OSMutexAccept:
\ 00000000 F8B5 PUSH {R3-R7,LR}
\ 00000002 0400 MOVS R4,R0
\ 00000004 0D00 MOVS R5,R1
87 INT8U pcp; /* Priority Ceiling Priority (PCP) */
88 #if OS_CRITICAL_METHOD == 3u /* Allocate storage for CPU status register */
89 OS_CPU_SR cpu_sr = 0u;
\ 00000006 0027 MOVS R7,#+0
90 #endif
91
92
93
94 #ifdef OS_SAFETY_CRITICAL
95 if (perr == (INT8U *)0) {
96 OS_SAFETY_CRITICAL_EXCEPTION();
97 return (OS_FALSE);
98 }
99 #endif
100
101 #if OS_ARG_CHK_EN > 0u
102 if (pevent == (OS_EVENT *)0) { /* Validate 'pevent' */
103 *perr = OS_ERR_PEVENT_NULL;
104 return (OS_FALSE);
105 }
106 #endif
107 if (pevent->OSEventType != OS_EVENT_TYPE_MUTEX) { /* Validate event block type */
\ 00000008 2078 LDRB R0,[R4, #+0]
\ 0000000A 0428 CMP R0,#+4
\ 0000000C 03D0 BEQ.N ??OSMutexAccept_0
108 *perr = OS_ERR_EVENT_TYPE;
\ 0000000E 0120 MOVS R0,#+1
\ 00000010 2870 STRB R0,[R5, #+0]
109 return (OS_FALSE);
\ 00000012 0020 MOVS R0,#+0
\ 00000014 41E0 B.N ??OSMutexAccept_1
110 }
111 if (OSIntNesting > 0u) { /* Make sure it's not called from an ISR */
\ ??OSMutexAccept_0:
\ 00000016 ........ LDR.W R0,??DataTable7
\ 0000001A 0078 LDRB R0,[R0, #+0]
\ 0000001C 0028 CMP R0,#+0
\ 0000001E 03D0 BEQ.N ??OSMutexAccept_2
112 *perr = OS_ERR_PEND_ISR;
\ 00000020 0220 MOVS R0,#+2
\ 00000022 2870 STRB R0,[R5, #+0]
113 return (OS_FALSE);
\ 00000024 0020 MOVS R0,#+0
\ 00000026 38E0 B.N ??OSMutexAccept_1
114 }
115 OS_ENTER_CRITICAL(); /* Get value (0 or 1) of Mutex */
\ ??OSMutexAccept_2:
\ 00000028 ........ BL OS_CPU_SR_Save
\ 0000002C 0700 MOVS R7,R0
116 pcp = (INT8U)(pevent->OSEventCnt >> 8u); /* Get PCP from mutex */
\ 0000002E 2089 LDRH R0,[R4, #+8]
\ 00000030 80B2 UXTH R0,R0 ;; ZeroExt R0,R0,#+16,#+16
\ 00000032 000A LSRS R0,R0,#+8
\ 00000034 0600 MOVS R6,R0
117 if ((pevent->OSEventCnt & OS_MUTEX_KEEP_LOWER_8) == OS_MUTEX_AVAILABLE) {
\ 00000036 207A LDRB R0,[R4, #+8]
\ 00000038 C0B2 UXTB R0,R0 ;; ZeroExt R0,R0,#+24,#+24
\ 0000003A FF28 CMP R0,#+255
\ 0000003C 27D1 BNE.N ??OSMutexAccept_3
118 pevent->OSEventCnt &= OS_MUTEX_KEEP_UPPER_8; /* Mask off LSByte (Acquire Mutex) */
\ 0000003E 2089 LDRH R0,[R4, #+8]
\ 00000040 10F47F40 ANDS R0,R0,#0xFF00
\ 00000044 2081 STRH R0,[R4, #+8]
119 pevent->OSEventCnt |= OSTCBCur->OSTCBPrio; /* Save current task priority in LSByte */
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