更新日期: 2022/06/01 来源: https://gitee.com/weharmony/kernel_liteos_a_note
函数
vid.c 文件参考

浏览源代码.

函数

UINT32 VidMapListInit (LosProcessCB *processCB)
 
void VidMapDestroy (LosProcessCB *processCB)
 销毁虚拟ID映射 更多...
 
static TimerIdMapNode * FindListNodeByVid (UINT16 vid)
 
static TimerIdMapNode * FindListNodeByRid (UINT32 rid)
 
static UINT16 GetFreeVid (VOID)
 
static VOID ReleaseVid (UINT16 vid)
 
UINT16 AddNodeByRid (UINT16 rid)
 
UINT16 GetRidByVid (UINT16 vid)
 
void RemoveNodeByVid (UINT16 vid)
 

函数说明

◆ AddNodeByRid()

UINT16 AddNodeByRid ( UINT16  rid)

在文件 vid.c 第 178 行定义.

179{
180 TimerIdMapNode *tmp = NULL;
181 LosProcessCB *processCB = OsCurrProcessGet();
182 UINT16 vid;
183
184 tmp = FindListNodeByRid(rid);
185 if (tmp) {
186 return tmp->vid;
187 }
188
189 LOS_MuxLock(&processCB->timerIdMap.vidMapLock, LOS_WAIT_FOREVER);
190 vid = GetFreeVid();
191 if (vid == MAX_INVALID_TIMER_VID) {
192 LOS_MuxUnlock(&processCB->timerIdMap.vidMapLock);
193 errno = ENOMEM;
194 return MAX_INVALID_TIMER_VID;
195 }
196 tmp = (TimerIdMapNode *)LOS_MemAlloc(m_aucSysMem0, sizeof(TimerIdMapNode));
197 if (tmp == NULL) {
198 PRINT_ERR("%s %d, alloc memory failed\n", __FUNCTION__, __LINE__);
199 LOS_MuxUnlock(&processCB->timerIdMap.vidMapLock);
200 errno = ENOMEM;
201 return MAX_INVALID_TIMER_VID;
202 }
203 tmp->rid = rid;
204 tmp->vid = vid;
205
206 LOS_ListTailInsert(&processCB->timerIdMap.head, &tmp->node);
207 LOS_MuxUnlock(&processCB->timerIdMap.vidMapLock);
208
209 return vid;
210}
LOS_ListTailInsert
LITE_OS_SEC_ALW_INLINE STATIC INLINE VOID LOS_ListTailInsert(LOS_DL_LIST *list, LOS_DL_LIST *node)
Insert a node to the tail of a doubly linked list.
Definition: los_list.h:244
LOS_MemAlloc
VOID * LOS_MemAlloc(VOID *pool, UINT32 size)
从指定内存池中申请size长度的内存,注意这可不是从内核堆空间中申请内存
Definition: los_memory.c:1123
m_aucSysMem0
UINT8 * m_aucSysMem0
异常交互动态内存池地址的起始地址，当不支持异常交互特性时，m_aucSysMem0等于m_aucSysMem1。
Definition: los_memory.c:107
LOS_MuxUnlock
LITE_OS_SEC_TEXT UINT32 LOS_MuxUnlock(LosMux *mutex)
释放锁
Definition: los_mux.c:559
LOS_MuxLock
LITE_OS_SEC_TEXT UINT32 LOS_MuxLock(LosMux *mutex, UINT32 timeout)
拿互斥锁,
Definition: los_mux.c:437
OsCurrProcessGet
STATIC INLINE LosProcessCB * OsCurrProcessGet(VOID)
Definition: los_process_pri.h:353
UINT16
unsigned short UINT16
Definition: los_typedef.h:56
ProcessCB::timerIdMap
TimerIdMap timerIdMap
Definition: los_process_pri.h:123
TimerIdMap::head
LOS_DL_LIST head
Definition: vid_type.h:38
TimerIdMap::vidMapLock
LosMux vidMapLock
Definition: vid_type.h:37
TimerIdMapNode::rid
UINT16 rid
Definition: vid_type.h:45
TimerIdMapNode::node
LOS_DL_LIST node
Definition: vid_type.h:44
TimerIdMapNode::vid
UINT16 vid
Definition: vid_type.h:46
FindListNodeByRid
static TimerIdMapNode * FindListNodeByRid(UINT32 rid)
Definition: vid.c:90
GetFreeVid
static UINT16 GetFreeVid(VOID)
Definition: vid.c:107
函数调用图:
这是这个函数的调用关系图:

◆ FindListNodeByRid()

static TimerIdMapNode * FindListNodeByRid ( UINT32  rid)
static

在文件 vid.c 第 90 行定义.

91{
92 TimerIdMapNode *idNode = NULL;
93 LosProcessCB *processCB = OsCurrProcessGet();
94
95 LOS_MuxLock(&processCB->timerIdMap.vidMapLock, LOS_WAIT_FOREVER);
96 LOS_DL_LIST_FOR_EACH_ENTRY(idNode, &processCB->timerIdMap.head, TimerIdMapNode, node) {
97 if (rid == idNode->rid) {
98 LOS_MuxUnlock(&processCB->timerIdMap.vidMapLock);
99 return idNode;
100 }
101 }
102 LOS_MuxUnlock(&processCB->timerIdMap.vidMapLock);
103
104 return NULL;
105}
函数调用图:
这是这个函数的调用关系图:

◆ FindListNodeByVid()

static TimerIdMapNode * FindListNodeByVid ( UINT16  vid)
static

在文件 vid.c 第 73 行定义.

74{
75 TimerIdMapNode *idNode = NULL;
76 LosProcessCB *processCB = OsCurrProcessGet();
77
78 LOS_MuxLock(&processCB->timerIdMap.vidMapLock, LOS_WAIT_FOREVER);
79 LOS_DL_LIST_FOR_EACH_ENTRY(idNode, &processCB->timerIdMap.head, TimerIdMapNode, node) {
80 if (vid == idNode->vid) {
81 LOS_MuxUnlock(&processCB->timerIdMap.vidMapLock);
82 return idNode;
83 }
84 }
85 LOS_MuxUnlock(&processCB->timerIdMap.vidMapLock);
86
87 return NULL;
88}
函数调用图:
这是这个函数的调用关系图:

◆ GetFreeVid()

static UINT16 GetFreeVid ( VOID  )
static

在文件 vid.c 第 107 行定义.

108{
109 UINT16 i, j;
110 UINT32 num;
111 UINT32 *tmp = NULL;
112 LosProcessCB *processCB = OsCurrProcessGet();
113 TimerIdMap *idMap = &processCB->timerIdMap;
114 UINT16 mapMaxNum = idMap->mapCount;
115
116 for (i = 0; i < mapMaxNum; i++) {
117 num = idMap->bitMap[i];
118 for (j = 0; j < INT_BIT_COUNT; j++) {
119 if ((num & (1 << j)) == 0) {
120 num |= 1 << j;
121 idMap->bitMap[i] = num;
122 return (INT_BIT_COUNT * i + j);
123 }
124 }
125 }
126
127 /* expand bit map */
128 mapMaxNum++;
129 if (mapMaxNum > VID_MAP_MAX_NUM) {
130 PRINT_ERR("%s %d, timer vid run out\n", __FUNCTION__, __LINE__);
131 return MAX_INVALID_TIMER_VID;
132 }
133
134 tmp = (UINT32*)LOS_MemAlloc(m_aucSysMem0, mapMaxNum * sizeof(UINT32));
135 if (tmp == NULL) {
136 PRINT_ERR("%s %d, alloc memory failed\n", __FUNCTION__, __LINE__);
137 return MAX_INVALID_TIMER_VID;
138 }
139
140 (void)memcpy_s(tmp, mapMaxNum * sizeof(UINT32), idMap->bitMap, (mapMaxNum - 1) * sizeof(UINT32));
141 LOS_MemFree(m_aucSysMem0, idMap->bitMap);
142 idMap->bitMap = tmp;
143 idMap->mapCount = mapMaxNum;
144 idMap->bitMap[i] = 1;
145 return (INT_BIT_COUNT * i);
146}
LOS_MemFree
UINT32 LOS_MemFree(VOID *pool, VOID *ptr)
释放从指定动态内存中申请的内存
Definition: los_memory.c:1369
UINT32
unsigned int UINT32
Definition: los_typedef.h:57
TimerIdMap::mapCount
UINT16 mapCount
Definition: vid_type.h:39
TimerIdMap::bitMap
UINT32 * bitMap
Definition: vid_type.h:40
void
ARG_NUM_3 ARG_NUM_1 ARG_NUM_2 ARG_NUM_2 ARG_NUM_3 ARG_NUM_1 ARG_NUM_4 ARG_NUM_2 ARG_NUM_2 ARG_NUM_5 ARG_NUM_2 void
Definition: syscall_lookup.h:62
函数调用图:
这是这个函数的调用关系图:

◆ GetRidByVid()

UINT16 GetRidByVid ( UINT16  vid)

在文件 vid.c 第 212 行定义.

213{
214 TimerIdMapNode *tmp = FindListNodeByVid(vid);
215 if (tmp) {
216 return tmp->rid;
217 }
218 return 0xffff;
219}
FindListNodeByVid
static TimerIdMapNode * FindListNodeByVid(UINT16 vid)
Definition: vid.c:73
函数调用图:
这是这个函数的调用关系图:

◆ ReleaseVid()

static VOID ReleaseVid ( UINT16  vid)
static

在文件 vid.c 第 148 行定义.

149{
150 UINT16 a, b;
151 UINT32 *tmpMap = NULL;
152 LosProcessCB *processCB = OsCurrProcessGet();
153 TimerIdMap *idMap = &processCB->timerIdMap;
154 UINT16 mapMaxNum = idMap->mapCount;
155
156 if (vid >= (VID_MAP_MAX_NUM * INT_BIT_COUNT)) {
157 return;
158 }
159
160 a = vid >> INT_BIT_SHIFT;
161 b = vid & (INT_BIT_COUNT - 1);
162
163 idMap->bitMap[a] &= ~(1 << b);
164
165 /* shrink bit map */
166 if (mapMaxNum > 1) {
167 if (idMap->bitMap[mapMaxNum - 1] == 0) {
168 mapMaxNum--;
169 tmpMap = LOS_MemRealloc(m_aucSysMem0, idMap->bitMap, mapMaxNum * sizeof(UINT32));
170 if (tmpMap) {
171 idMap->bitMap = tmpMap;
172 idMap->mapCount = mapMaxNum;
173 }
174 }
175 }
176}
LOS_MemRealloc
VOID * LOS_MemRealloc(VOID *pool, VOID *ptr, UINT32 size)
按size大小重新分配内存块，并将原内存块内容拷贝到新内存块。如果新内存块申请成功，则释放原内存块
Definition: los_memory.c:1510
函数调用图:
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◆ RemoveNodeByVid()

void RemoveNodeByVid ( UINT16  vid)

在文件 vid.c 第 221 行定义.

222{
223 TimerIdMapNode *tmp = NULL;
224 LosProcessCB *processCB = OsCurrProcessGet();
225
226 tmp = FindListNodeByVid(vid);
227 if (tmp == NULL) {
228 return;
229 }
230
231 LOS_MuxLock(&processCB->timerIdMap.vidMapLock, LOS_WAIT_FOREVER);
232 LOS_ListDelete(&tmp->node);
233 ReleaseVid(tmp->vid);
234 LOS_MuxUnlock(&processCB->timerIdMap.vidMapLock);
235 LOS_MemFree(m_aucSysMem0, tmp);
236
237 return;
238}
LOS_ListDelete
LITE_OS_SEC_ALW_INLINE STATIC INLINE VOID LOS_ListDelete(LOS_DL_LIST *node)
Definition: los_list.h:292
ReleaseVid
static VOID ReleaseVid(UINT16 vid)
Definition: vid.c:148
函数调用图:
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◆ VidMapDestroy()

void VidMapDestroy ( LosProcessCB *  processCB)

销毁虚拟ID映射

在文件 vid.c 第 57 行定义.

58{
59 TimerIdMapNode *idNode = NULL;
60 TimerIdMapNode *idNodeNext = NULL;
61
62 LOS_MuxLock(&processCB->timerIdMap.vidMapLock, LOS_WAIT_FOREVER);
63 LOS_DL_LIST_FOR_EACH_ENTRY_SAFE(idNode, idNodeNext, &processCB->timerIdMap.head, TimerIdMapNode, node) {
64 LOS_ListDelete(&idNode->node);
65 LOS_MemFree(m_aucSysMem0, idNode);
66 }
67
68 LOS_MuxUnlock(&processCB->timerIdMap.vidMapLock);
69 LOS_MemFree(m_aucSysMem0, processCB->timerIdMap.bitMap);
70 LOS_MuxDestroy(&processCB->timerIdMap.vidMapLock);
71}
LOS_MuxDestroy
LITE_OS_SEC_TEXT UINT32 LOS_MuxDestroy(LosMux *mutex)
销毁互斥锁
Definition: los_mux.c:289
函数调用图:
这是这个函数的调用关系图:

◆ VidMapListInit()

UINT32 VidMapListInit ( LosProcessCB *  processCB)

在文件 vid.c 第 36 行定义.

37{
38 (void)memset_s(&processCB->timerIdMap, sizeof(TimerIdMap), 0, sizeof(TimerIdMap));
39 LOS_ListInit(&processCB->timerIdMap.head);
40 processCB->timerIdMap.bitMap = (UINT32*)LOS_MemAlloc(m_aucSysMem0, sizeof(UINT32));
41 if (processCB->timerIdMap.bitMap == NULL) {
42 PRINT_ERR("%s %d, alloc memory failed\n", __FUNCTION__, __LINE__);
43 return LOS_NOK;
44 }
45
46 processCB->timerIdMap.mapCount = 1;
47 (void)memset_s(processCB->timerIdMap.bitMap, sizeof(UINT32), 0, sizeof(UINT32));
48 if (LOS_MuxInit(&processCB->timerIdMap.vidMapLock, NULL) != LOS_OK) {
49 PRINT_ERR("%s %d, Create mutex for vmm failed\n", __FUNCTION__, __LINE__);
50 LOS_MemFree(m_aucSysMem0, processCB->timerIdMap.bitMap);
51 processCB->timerIdMap.bitMap = NULL;
52 return LOS_NOK;
53 }
54 return LOS_OK;
55}
LOS_ListInit
LITE_OS_SEC_ALW_INLINE STATIC INLINE VOID LOS_ListInit(LOS_DL_LIST *list)
Definition: los_list.h:104
LOS_MuxInit
LITE_OS_SEC_TEXT UINT32 LOS_MuxInit(LosMux *mutex, const LosMuxAttr *attr)
初始化互斥锁
Definition: los_mux.c:262
函数调用图:
这是这个函数的调用关系图: