内存乒乓缓存机制和消息分发机制的C代码实现
2012-12-27 19:09
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//****************************************************
//*内存乒乓 BUFF 机制
//*算法是,1 Buff ->write,1 Buff ->read,写满后反过来。
//*正常返回 0,出错返回-1
//****************************************************
/*ping pong Buff's ID */
typedef
enum{
BUFF_PING = 0,
/*Ping ID 的 Buff*/
BUFF_PONG = 1,
BUFF_PIPONUM
}EN_PINGPONG_ID;
/*Pong ID 的 Buff*/
/*ping pong use ststus */
typedef
enum{
BUFF_WRITEABLE = 0,
/*Buff 可写状态*/
BUFF_READABLE
=1
}EN_USE_STATUS;
/*buff use description*/
/*Buff 可读状态*/
typedef
struct
_T_BUFF_USE_DES{
EN_USE_STATUS eUseStatus;/*可用状态*/
char*
pcHeadAddr;/*首地址*/
unsigned int
unsigned int
}T_BUFF_USE_DES;
nBuffSize;
nOffset;
/*Buff size*/
/*当前可用偏移*/
/*ping pong buff 的使用描述*/
typedef
struct
_T_PINGPONGBUFF_USE_DES{
EN_PINGPONG_ID
eCurUseID; /*current use ID*/
T_BUFF_USE_DES
tPingBuffUse[BUFF_PIPONUM];/*Ping Buff use status*//*Pong Buff use status*/
}T_PINGPONGBUFF_USE_DES;
/*可读消息结构*/
typedef
struct
_T_MSG_REC2FILE{
//EN_PINGPONG_ID
enBuffID;/*Buff ID*/
T_BUFF_USE_DES
REC_FILE_DESLIST
}T_MSG_REC2FILE;
*ptBuffUse;/*Buff USE*/
*ptFileList; /*Rec File List*/
//****************************************************
//*实现一个简单消息队列
//****************************************************
/* Time Weight Task Process Msg type */
typedef
enum{
TWT_PINGPONGBUFF_REC = 0,
/*ping pong buff 记录文件消息*/
TWT_MSGTYPE_NUM
}EN_TWT_MSGTYPE;
/*Twt 消息结构*/
typedef
struct
_T_TWTMSG{
EN_TWT_MSGTYPE
enMsgType;/*msg type*/
void*
pvMsg;/*msg entry*/
void
(*pfDestroyMsg)(void* pvMsg);/*回收消息体的方法*/
}T_TWTMSG;
#define
TIMEWEIGHT_TASKQUEUE_SIZE
10
/* Helper struct to hold a queue of Msgs */
typedef struct
_T_TWTMSG_QUEUE{
T_TWTMSG
*pvMsg[TIMEWEIGHT_TASKQUEUE_SIZE];
unsigned long qwrite;
unsigned long qread;
unsigned long overflow;
}T_TWTMSG_QUEUE;
/* Helper macros for accessing Msg queues. */
#define TWT_QUEUE_EMPTY(q) \
(((q)->qwrite == (q)->qread) ?1:0)
#define TWT_QUEUE_FULL(q) \
((((((q)->qwrite + 1) % TIMEWEIGHT_TASKQUEUE_SIZE)) == (q)->qread)?1:0)
/**
* generate a Msg entity
* 正常返回消息体的指针,异常返回 NULL
*/
T_TWTMSG*
generateMsg(){
T_TWTMSG*
ptMsg = NULL;
if(NULL == (ptMsg = malloc(sizeof(T_TWTMSG)))) return
memset(ptMsg, 0, sizeof(T_TWTMSG));
return
ptMsg;
}
/**
* destroy a Msg
*
*/
NULL;
void
destroyMsg(T_TWTMSG* ptMsg){
if (NULL != ptMsg->pfDestroyMsg)ptMsg->pfDestroyMsg(ptMsg->pvMsg);
if (NULL != ptMsg)free(ptMsg);
}
/**
* free a Msg Queue
*
*/
void
freeTWTMsgQue(T_TWTMSG_QUEUE*
if (NULL != ptMsgQ)free(ptMsgQ);
ptMsgQ){
}
/**
* Init a Msg Queue
*
*/
T_TWTMSG_QUEUE*
initTWTMsgQue(){
T_TWTMSG_QUEUE*
ptMsgQ = NULL;
if (NULL == (ptMsgQ = malloc(sizeof(T_TWTMSG_QUEUE))))goto
memset(ptMsgQ, 0, sizeof(T_TWTMSG_QUEUE));
return ptMsgQ;
_ErrRet:
printf("initTWTMsgQue
Fail!\n");
freeTWTMsgQue(ptMsgQ);
return NULL;
}
_ErrRet;
/**
* Pop a pvMsg packet from a Msg packet queue
*
* @param q is the packet queue from which to pop the pbuf.
*
* @return pointer to pvMsg packet if available, NULL otherswise.
*/
T_TWTMSG* TWTMsgGet(T_TWTMSG_QUEUE
{
T_TWTMSG*
ptMsg;
*q)
//*加锁
if(TWT_QUEUE_EMPTY(q)) {
/* Return a NULL pointer if the queue is empty. */
ptMsg = NULL;
}else {
/**
* The queue is not empty so return the next frame from it
* and adjust the read pointer accordingly.
*
*/
ptMsg = q->pvMsg[q->qread];
q->qread = ((q->qread + 1) % TIMEWEIGHT_TASKQUEUE_SIZE);
}
//*解锁
return(ptMsg);
}
/**
* Push a pvMsg packet onto a pvMsg packet queue
*
* @param p is the pvMsg to push onto the packet queue.
* @param q is the packet queue.
*
* @return 0 if successful, -1 if q is full.
*/
int
TWTMsgSend(T_TWTMSG *p, T_TWTMSG_QUEUE *q)
{
int ret;
//*加锁
if(!TWT_QUEUE_FULL(q)){
/**
* The queue isn't full so we add the new frame at the current
* write position and move the write pointer.
*
*/
q->pvMsg[q->qwrite] = p;
q->qwrite = ((q->qwrite + 1) % TIMEWEIGHT_TASKQUEUE_SIZE);
ret = 0;
}else{
/**
* The stack is full so we are throwing away this value.
Keep track
* of the number of times this happens.
*
*/
q->overflow++;
ret = -1;
}
//*解锁
return(ret);
}
//****************************************************
//*消息分发机制
//*算法是,
//*正常返回 0,出错返回-1
//****************************************************
extern int
RecToFileMsgProc(T_MSG_REC2FILE* ptMsg);
int
DispatchMsg(T_TWTMSG *ptMsg){
if (NULL == ptMsg)goto _ErrRet;
/*dispatch msg*/
switch(ptMsg->enMsgType){
case TWT_PINGPONGBUFF_REC:
RecToFileMsgProc((T_MSG_REC2FILE*)(ptMsg->pvMsg));/*处理消息*/
destroyMsg(ptMsg);/*消毁消息*/
break;
default:
printf("DispatchMsg Msgtype Error!\n");
break;
}
return
0;
_ErrRet:
printf("DispatchMsg
Fail!\n");
return -1;
}
/*buff size*/
#define
PINGPONG_BUFF_BSIZE
/*ping pong buff*/
0x20000//10*1024*1024/*10M*/
//char
gacPINGBUFF[PINGPONG_BUFF_BSIZE];/*Ping Buff*/
//char
gacPONGBUFF[PINGPONG_BUFF_BSIZE];/*Pong Buff*/
//****************************************************
//*释放 ping pong buff
//*必然成功
//*无返回
//****************************************************
void DestroyPingPongBuff(T_PINGPONGBUFF_USE_DES* ptPingPongBuff){
int
nLoop;
if (NULL == ptPingPongBuff)return ;
for (nLoop=0; nLoop<BUFF_PIPONUM; nLoop++){
if (NULL != ptPingPongBuff->tPingBuffUse[nLoop].pcHeadAddr)free(ptPingPongBuff->tPingBuffUse[nLoop].pcHeadAddr);
}
free(ptPingPongBuff);
}
//****************************************************
//*初始化 ping pong buff
//*返回 pign pong buff 的描述指针
//*正常返回 0,出错返回-1
//****************************************************
T_PINGPONGBUFF_USE_DES* InitPingPongBuff(unsigned int nBuffSize){
T_PINGPONGBUFF_USE_DES*
ptBuffDes = NULL;
int
nLoop = 0;
/*获取 buff 描述*/
if (NULL == (ptBuffDes=malloc(sizeof(T_PINGPONGBUFF_USE_DES))))goto
memset(ptBuffDes, 0, sizeof(T_PINGPONGBUFF_USE_DES));
_ErrRet;
/*分别初始化 ping 和 pong*/
for (nLoop=0; nLoop<BUFF_PIPONUM; nLoop++){
if (NULL == (ptBuffDes->tPingBuffUse[nLoop].pcHeadAddr = malloc(nBuffSize)))goto
ptBuffDes->tPingBuffUse[nLoop].nBuffSize = nBuffSize;
ptBuffDes->tPingBuffUse[nLoop].nOffset
= 0;
ptBuffDes->tPingBuffUse[nLoop].eUseStatus=BUFF_WRITEABLE;
}
ptBuffDes->eCurUseID
return ptBuffDes;
_ErrRet:
printf("InitPingPongBuff
=
BUFF_PING;
Fail!\n");
_ErrRet;
DestroyPingPongBuff(ptBuffDes);
return NULL;
}
//****************************************************
//*Reset ping pong buff
//*
//*正常返回 0,出错返回-1
//****************************************************
#define
ResetBuffUse(ptBuffUse) {\
ptBuffUse->nOffset
= 0;\
ptBuffUse->eUseStatus = BUFF_WRITEABLE;\
}
/**
* generate a file rec Msg
* 正常返回消息体的指针,异常返回 NULL
*/
T_MSG_REC2FILE*
genFRMsg(T_BUFF_USE_DES
T_MSG_REC2FILE*
ptRFMsg = NULL;
*ptBuffUse, REC_FILE_DESLIST
if (NULL == (ptRFMsg = malloc(sizeof(T_MSG_REC2FILE))))return NULL;
ptRFMsg->ptBuffUse = ptBuffUse;
ptRFMsg->ptFileList = ptFileList;
return
}
/**
ptRFMsg;
*ptFileList){
* destroy a file rec Msg
*
*/
void
desFRMsg(void* ptMsg){
if (NULL != ptMsg)free(ptMsg);
}
//****************************************************
//*PingPong buff data record
//*算法是,如果 buff 记满,触发一个消息,令写文件线程进入工作状态
//*正常返回 0,出错返回-1
//****************************************************
int
PingPongBuffRec(T_PINGPONGBUFF_USE_DES* ptBuffDes, T_TWTMSG_QUEUE *ptMsgQ,
REC_FILE_DESLIST* pfFileList, const char* pcData, unsigned long
int
T_TWTMSG
nDataLen){
nLoop;
*ptRecMsg = NULL;
/*input protect*/
if ((NULL == ptBuffDes)||(NULL == pcData))goto _ErrRet;
/*数据过滤,get what i want*/
if (0 != DataFilter(&pcData, &nDataLen))return
0;
/*current buff full*/
if (ptBuffDes->tPingBuffUse[ptBuffDes->eCurUseID].nBuffSize < (ptBuffDes->tPingBuffUse[ptBuffDes->eCurUseID].nOffset+nDataLen)) {
/*修改当前 buff 状态*/
ptBuffDes->tPingBuffUse[ptBuffDes->eCurUseID].eUseStatus = BUFF_READABLE;
/*发送消息触发记录线程工作*/
if (NULL == (ptRecMsg = generateMsg()))goto _ErrRet;
ptRecMsg->enMsgType = TWT_PINGPONGBUFF_REC;
ptRecMsg->pvMsg = genFRMsg(&(ptBuffDes->tPingBuffUse[ptBuffDes->eCurUseID]), pfFileList);
ptRecMsg->pfDestroyMsg = desFRMsg;
if (0 != TWTMsgSend(ptRecMsg, ptMsgQ))goto _ErrRet;
/*search for write useable buff as new current buff*/
for(nLoop=0; nLoop<BUFF_PIPONUM; nLoop++){
if(BUFF_WRITEABLE == ptBuffDes->tPingBuffUse[nLoop].eUseStatus)break;
}
if (BUFF_PIPONUM <= nLoop)goto _ErrRet;/*if ping and pong all cannot be written*/
ptBuffDes->eCurUseID = nLoop;
}
/*current buff is full?*/
if (ptBuffDes->tPingBuffUse[ptBuffDes->eCurUseID].nBuffSize < (ptBuffDes->tPingBuffUse[ptBuffDes->eCurUseID].nOffset+nDataLen))goto _ErrRet;
/*store data and update the descripton*/
memcpy(ptBuffDes->tPingBuffUse[ptBuffDes->eCurUseID].pcHeadAddr+ptBuffDes->tPingBuffUse[ptBuffDes->eCurUseID].nOffset, pcData, nDataLen);
ptBuffDes->tPingBuffUse[ptBuffDes->eCurUseID].nOffset += nDataLen;
return 0;
_ErrRet:
printf("PingPongBuffRec
return -1;
}
Fail!\n");
//****************************************************
//*Ping Pong Buff 写入文件线程消息处理函数
//*算法是,将 buff 数据写入文件并更新所使用的 buff 描述
//*正常返回 0,出错返回-1
//****************************************************
int
RecToFileMsgProc(T_MSG_REC2FILE* ptMsg){
if (NULL == ptMsg)goto
_ErrRet;
if (BUFF_READABLE != ptMsg->ptBuffUse->eUseStatus)goto
_ErrRet;
/*对对应接口的合法数据进行记录*/
//if (0 != RecBuff2File(ptMsg->ptFileList, ptMsg->ptBuffUse->pcHeadAddr, ptMsg->ptBuffUse->nOffset))goto
_ErrRet;
if (0 != ExRecOutFileList(ptMsg->ptFileList, ptMsg->ptBuffUse->pcHeadAddr, ptMsg->ptBuffUse->nOffset))goto
_ErrRet;
/*更新 Buff use*/
ResetBuffUse(ptMsg->ptBuffUse);
return 0;
_ErrRet:
printf("RecToFileMsgProc
return
Fail!\n");
-1;
}
//****************************************************
//*线程消息处理函数
//*算法是,获取消息,分发,处理
//*
//****************************************************
#define TWT_TWC_ms
10
void
TWT_Task(void* pvParam){
T_TWTMSG_QUEUE
T_TWTMSG
*ptMsgQ = pvParam;
*ptMsg = NULL;
while(1){
/*if msg come?*/
if (!(ptMsg = TWTMsgGet(ptMsgQ))){
//Sleep(TWT_TWC_ms);
continue;
}
/*dispatch msg*/
DispatchMsg(ptMsg);
}
}
//*内存乒乓 BUFF 机制
//*算法是,1 Buff ->write,1 Buff ->read,写满后反过来。
//*正常返回 0,出错返回-1
//****************************************************
/*ping pong Buff's ID */
typedef
enum{
BUFF_PING = 0,
/*Ping ID 的 Buff*/
BUFF_PONG = 1,
BUFF_PIPONUM
}EN_PINGPONG_ID;
/*Pong ID 的 Buff*/
/*ping pong use ststus */
typedef
enum{
BUFF_WRITEABLE = 0,
/*Buff 可写状态*/
BUFF_READABLE
=1
}EN_USE_STATUS;
/*buff use description*/
/*Buff 可读状态*/
typedef
struct
_T_BUFF_USE_DES{
EN_USE_STATUS eUseStatus;/*可用状态*/
char*
pcHeadAddr;/*首地址*/
unsigned int
unsigned int
}T_BUFF_USE_DES;
nBuffSize;
nOffset;
/*Buff size*/
/*当前可用偏移*/
/*ping pong buff 的使用描述*/
typedef
struct
_T_PINGPONGBUFF_USE_DES{
EN_PINGPONG_ID
eCurUseID; /*current use ID*/
T_BUFF_USE_DES
tPingBuffUse[BUFF_PIPONUM];/*Ping Buff use status*//*Pong Buff use status*/
}T_PINGPONGBUFF_USE_DES;
/*可读消息结构*/
typedef
struct
_T_MSG_REC2FILE{
//EN_PINGPONG_ID
enBuffID;/*Buff ID*/
T_BUFF_USE_DES
REC_FILE_DESLIST
}T_MSG_REC2FILE;
*ptBuffUse;/*Buff USE*/
*ptFileList; /*Rec File List*/
//****************************************************
//*实现一个简单消息队列
//****************************************************
/* Time Weight Task Process Msg type */
typedef
enum{
TWT_PINGPONGBUFF_REC = 0,
/*ping pong buff 记录文件消息*/
TWT_MSGTYPE_NUM
}EN_TWT_MSGTYPE;
/*Twt 消息结构*/
typedef
struct
_T_TWTMSG{
EN_TWT_MSGTYPE
enMsgType;/*msg type*/
void*
pvMsg;/*msg entry*/
void
(*pfDestroyMsg)(void* pvMsg);/*回收消息体的方法*/
}T_TWTMSG;
#define
TIMEWEIGHT_TASKQUEUE_SIZE
10
/* Helper struct to hold a queue of Msgs */
typedef struct
_T_TWTMSG_QUEUE{
T_TWTMSG
*pvMsg[TIMEWEIGHT_TASKQUEUE_SIZE];
unsigned long qwrite;
unsigned long qread;
unsigned long overflow;
}T_TWTMSG_QUEUE;
/* Helper macros for accessing Msg queues. */
#define TWT_QUEUE_EMPTY(q) \
(((q)->qwrite == (q)->qread) ?1:0)
#define TWT_QUEUE_FULL(q) \
((((((q)->qwrite + 1) % TIMEWEIGHT_TASKQUEUE_SIZE)) == (q)->qread)?1:0)
/**
* generate a Msg entity
* 正常返回消息体的指针,异常返回 NULL
*/
T_TWTMSG*
generateMsg(){
T_TWTMSG*
ptMsg = NULL;
if(NULL == (ptMsg = malloc(sizeof(T_TWTMSG)))) return
memset(ptMsg, 0, sizeof(T_TWTMSG));
return
ptMsg;
}
/**
* destroy a Msg
*
*/
NULL;
void
destroyMsg(T_TWTMSG* ptMsg){
if (NULL != ptMsg->pfDestroyMsg)ptMsg->pfDestroyMsg(ptMsg->pvMsg);
if (NULL != ptMsg)free(ptMsg);
}
/**
* free a Msg Queue
*
*/
void
freeTWTMsgQue(T_TWTMSG_QUEUE*
if (NULL != ptMsgQ)free(ptMsgQ);
ptMsgQ){
}
/**
* Init a Msg Queue
*
*/
T_TWTMSG_QUEUE*
initTWTMsgQue(){
T_TWTMSG_QUEUE*
ptMsgQ = NULL;
if (NULL == (ptMsgQ = malloc(sizeof(T_TWTMSG_QUEUE))))goto
memset(ptMsgQ, 0, sizeof(T_TWTMSG_QUEUE));
return ptMsgQ;
_ErrRet:
printf("initTWTMsgQue
Fail!\n");
freeTWTMsgQue(ptMsgQ);
return NULL;
}
_ErrRet;
/**
* Pop a pvMsg packet from a Msg packet queue
*
* @param q is the packet queue from which to pop the pbuf.
*
* @return pointer to pvMsg packet if available, NULL otherswise.
*/
T_TWTMSG* TWTMsgGet(T_TWTMSG_QUEUE
{
T_TWTMSG*
ptMsg;
*q)
//*加锁
if(TWT_QUEUE_EMPTY(q)) {
/* Return a NULL pointer if the queue is empty. */
ptMsg = NULL;
}else {
/**
* The queue is not empty so return the next frame from it
* and adjust the read pointer accordingly.
*
*/
ptMsg = q->pvMsg[q->qread];
q->qread = ((q->qread + 1) % TIMEWEIGHT_TASKQUEUE_SIZE);
}
//*解锁
return(ptMsg);
}
/**
* Push a pvMsg packet onto a pvMsg packet queue
*
* @param p is the pvMsg to push onto the packet queue.
* @param q is the packet queue.
*
* @return 0 if successful, -1 if q is full.
*/
int
TWTMsgSend(T_TWTMSG *p, T_TWTMSG_QUEUE *q)
{
int ret;
//*加锁
if(!TWT_QUEUE_FULL(q)){
/**
* The queue isn't full so we add the new frame at the current
* write position and move the write pointer.
*
*/
q->pvMsg[q->qwrite] = p;
q->qwrite = ((q->qwrite + 1) % TIMEWEIGHT_TASKQUEUE_SIZE);
ret = 0;
}else{
/**
* The stack is full so we are throwing away this value.
Keep track
* of the number of times this happens.
*
*/
q->overflow++;
ret = -1;
}
//*解锁
return(ret);
}
//****************************************************
//*消息分发机制
//*算法是,
//*正常返回 0,出错返回-1
//****************************************************
extern int
RecToFileMsgProc(T_MSG_REC2FILE* ptMsg);
int
DispatchMsg(T_TWTMSG *ptMsg){
if (NULL == ptMsg)goto _ErrRet;
/*dispatch msg*/
switch(ptMsg->enMsgType){
case TWT_PINGPONGBUFF_REC:
RecToFileMsgProc((T_MSG_REC2FILE*)(ptMsg->pvMsg));/*处理消息*/
destroyMsg(ptMsg);/*消毁消息*/
break;
default:
printf("DispatchMsg Msgtype Error!\n");
break;
}
return
0;
_ErrRet:
printf("DispatchMsg
Fail!\n");
return -1;
}
/*buff size*/
#define
PINGPONG_BUFF_BSIZE
/*ping pong buff*/
0x20000//10*1024*1024/*10M*/
//char
gacPINGBUFF[PINGPONG_BUFF_BSIZE];/*Ping Buff*/
//char
gacPONGBUFF[PINGPONG_BUFF_BSIZE];/*Pong Buff*/
//****************************************************
//*释放 ping pong buff
//*必然成功
//*无返回
//****************************************************
void DestroyPingPongBuff(T_PINGPONGBUFF_USE_DES* ptPingPongBuff){
int
nLoop;
if (NULL == ptPingPongBuff)return ;
for (nLoop=0; nLoop<BUFF_PIPONUM; nLoop++){
if (NULL != ptPingPongBuff->tPingBuffUse[nLoop].pcHeadAddr)free(ptPingPongBuff->tPingBuffUse[nLoop].pcHeadAddr);
}
free(ptPingPongBuff);
}
//****************************************************
//*初始化 ping pong buff
//*返回 pign pong buff 的描述指针
//*正常返回 0,出错返回-1
//****************************************************
T_PINGPONGBUFF_USE_DES* InitPingPongBuff(unsigned int nBuffSize){
T_PINGPONGBUFF_USE_DES*
ptBuffDes = NULL;
int
nLoop = 0;
/*获取 buff 描述*/
if (NULL == (ptBuffDes=malloc(sizeof(T_PINGPONGBUFF_USE_DES))))goto
memset(ptBuffDes, 0, sizeof(T_PINGPONGBUFF_USE_DES));
_ErrRet;
/*分别初始化 ping 和 pong*/
for (nLoop=0; nLoop<BUFF_PIPONUM; nLoop++){
if (NULL == (ptBuffDes->tPingBuffUse[nLoop].pcHeadAddr = malloc(nBuffSize)))goto
ptBuffDes->tPingBuffUse[nLoop].nBuffSize = nBuffSize;
ptBuffDes->tPingBuffUse[nLoop].nOffset
= 0;
ptBuffDes->tPingBuffUse[nLoop].eUseStatus=BUFF_WRITEABLE;
}
ptBuffDes->eCurUseID
return ptBuffDes;
_ErrRet:
printf("InitPingPongBuff
=
BUFF_PING;
Fail!\n");
_ErrRet;
DestroyPingPongBuff(ptBuffDes);
return NULL;
}
//****************************************************
//*Reset ping pong buff
//*
//*正常返回 0,出错返回-1
//****************************************************
#define
ResetBuffUse(ptBuffUse) {\
ptBuffUse->nOffset
= 0;\
ptBuffUse->eUseStatus = BUFF_WRITEABLE;\
}
/**
* generate a file rec Msg
* 正常返回消息体的指针,异常返回 NULL
*/
T_MSG_REC2FILE*
genFRMsg(T_BUFF_USE_DES
T_MSG_REC2FILE*
ptRFMsg = NULL;
*ptBuffUse, REC_FILE_DESLIST
if (NULL == (ptRFMsg = malloc(sizeof(T_MSG_REC2FILE))))return NULL;
ptRFMsg->ptBuffUse = ptBuffUse;
ptRFMsg->ptFileList = ptFileList;
return
}
/**
ptRFMsg;
*ptFileList){
* destroy a file rec Msg
*
*/
void
desFRMsg(void* ptMsg){
if (NULL != ptMsg)free(ptMsg);
}
//****************************************************
//*PingPong buff data record
//*算法是,如果 buff 记满,触发一个消息,令写文件线程进入工作状态
//*正常返回 0,出错返回-1
//****************************************************
int
PingPongBuffRec(T_PINGPONGBUFF_USE_DES* ptBuffDes, T_TWTMSG_QUEUE *ptMsgQ,
REC_FILE_DESLIST* pfFileList, const char* pcData, unsigned long
int
T_TWTMSG
nDataLen){
nLoop;
*ptRecMsg = NULL;
/*input protect*/
if ((NULL == ptBuffDes)||(NULL == pcData))goto _ErrRet;
/*数据过滤,get what i want*/
if (0 != DataFilter(&pcData, &nDataLen))return
0;
/*current buff full*/
if (ptBuffDes->tPingBuffUse[ptBuffDes->eCurUseID].nBuffSize < (ptBuffDes->tPingBuffUse[ptBuffDes->eCurUseID].nOffset+nDataLen)) {
/*修改当前 buff 状态*/
ptBuffDes->tPingBuffUse[ptBuffDes->eCurUseID].eUseStatus = BUFF_READABLE;
/*发送消息触发记录线程工作*/
if (NULL == (ptRecMsg = generateMsg()))goto _ErrRet;
ptRecMsg->enMsgType = TWT_PINGPONGBUFF_REC;
ptRecMsg->pvMsg = genFRMsg(&(ptBuffDes->tPingBuffUse[ptBuffDes->eCurUseID]), pfFileList);
ptRecMsg->pfDestroyMsg = desFRMsg;
if (0 != TWTMsgSend(ptRecMsg, ptMsgQ))goto _ErrRet;
/*search for write useable buff as new current buff*/
for(nLoop=0; nLoop<BUFF_PIPONUM; nLoop++){
if(BUFF_WRITEABLE == ptBuffDes->tPingBuffUse[nLoop].eUseStatus)break;
}
if (BUFF_PIPONUM <= nLoop)goto _ErrRet;/*if ping and pong all cannot be written*/
ptBuffDes->eCurUseID = nLoop;
}
/*current buff is full?*/
if (ptBuffDes->tPingBuffUse[ptBuffDes->eCurUseID].nBuffSize < (ptBuffDes->tPingBuffUse[ptBuffDes->eCurUseID].nOffset+nDataLen))goto _ErrRet;
/*store data and update the descripton*/
memcpy(ptBuffDes->tPingBuffUse[ptBuffDes->eCurUseID].pcHeadAddr+ptBuffDes->tPingBuffUse[ptBuffDes->eCurUseID].nOffset, pcData, nDataLen);
ptBuffDes->tPingBuffUse[ptBuffDes->eCurUseID].nOffset += nDataLen;
return 0;
_ErrRet:
printf("PingPongBuffRec
return -1;
}
Fail!\n");
//****************************************************
//*Ping Pong Buff 写入文件线程消息处理函数
//*算法是,将 buff 数据写入文件并更新所使用的 buff 描述
//*正常返回 0,出错返回-1
//****************************************************
int
RecToFileMsgProc(T_MSG_REC2FILE* ptMsg){
if (NULL == ptMsg)goto
_ErrRet;
if (BUFF_READABLE != ptMsg->ptBuffUse->eUseStatus)goto
_ErrRet;
/*对对应接口的合法数据进行记录*/
//if (0 != RecBuff2File(ptMsg->ptFileList, ptMsg->ptBuffUse->pcHeadAddr, ptMsg->ptBuffUse->nOffset))goto
_ErrRet;
if (0 != ExRecOutFileList(ptMsg->ptFileList, ptMsg->ptBuffUse->pcHeadAddr, ptMsg->ptBuffUse->nOffset))goto
_ErrRet;
/*更新 Buff use*/
ResetBuffUse(ptMsg->ptBuffUse);
return 0;
_ErrRet:
printf("RecToFileMsgProc
return
Fail!\n");
-1;
}
//****************************************************
//*线程消息处理函数
//*算法是,获取消息,分发,处理
//*
//****************************************************
#define TWT_TWC_ms
10
void
TWT_Task(void* pvParam){
T_TWTMSG_QUEUE
T_TWTMSG
*ptMsgQ = pvParam;
*ptMsg = NULL;
while(1){
/*if msg come?*/
if (!(ptMsg = TWTMsgGet(ptMsgQ))){
//Sleep(TWT_TWC_ms);
continue;
}
/*dispatch msg*/
DispatchMsg(ptMsg);
}
}
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