您好我遇到的问题是，当我处理unique_ptr数组变量时，我似乎在泄漏内存。现在我已经隔离了问题发生的地方，但我不明白泄漏发生的原因。我怀疑我可能会误导unique_ptr，但研究互联网和这个网站我还没有发现我做错了什么。当两个函数在彼此之间传递unique_ptr时，会出现问题。我已经指出了感兴趣/重要的代码行，并省略了不相关的代码。
int doInstruction(SerialPort^ sPort, unsigned char cmdCode,
unique_ptr<unsigned char[]> ¶m, int sizeOfParam,
unique_ptr<char[]> &strMsg,int sizeOfMsg,
unique_ptr<unsigned char[]> &outputData){<<-- I pass in a unique_ptr
by reference in order
to return data
unique_ptr<unsigned char[]> tempOutput; <<--This is where the
unique_ptr starts
unsigned char ack[] = ACK;
unsigned char nack[] = NACK;
unsigned char appErr = ERROR_BYTE;
int a = 0;
int dataPacketLength = 7 + sizeOfParam + sizeOfMsg;
int sizeOfReply, errMsg;
int errTrckr = 0;
array<Byte>^ instruction = generateIns(cmdCode,param,sizeOfParam,
strMsg,sizeOfMsg);
bool ackCheckStage = true;
bool hasResponse = false;
bool ackCheck = true;
bool nackRepeat = false;
switch(cmdCode){
case INS_READCARD:
hasResponse = true;
break;
case INS_RETRANSMIT:
hasResponse = false;
ackCheckStage = false;
break;
}//end switch
tempOutput = move(outputData);
sendInstruction(instruction,dataPacketLength,sPort);
while(a < 1){
a++;
errMsg = 0;
errMsg = receiveMessage(sPort,tempOutput); <<--passes the unique_ptr
to the receiveMessage function, this line
is called twice, the first time it runs
fine but on the second run memory leaks
//extract length of reply..only sent if message received successfully
if(errMsg > 9){
sizeOfReply = errMsg/10;
errMsg = 0;
}//end if
if(errMsg == 0){ //success
if(ackCheckStage){ //looking for acknowledgment
if(sizeOfReply == 2 && tempOutput[0] == ack[0]
&& tempOutput[1] == ack[1]){//acknowledged
if(hasResponse){ <<--This section decides if the while loop
repeats or not, the issues occurs
when the loop repeats the 2nd time
a--;
ackCheckStage = false;
}else{
outputData = move(tempOutput);
return 0;
}//end if
}else if(){
//irrellevant code
}//end if
}else{ //looking at a message
outputData = move(tempOutput); <<--after all is said and done
I return the unique_ptr
return 0;
}//end if
}else{
//irrellevant code
}//end else if
}//end while
return -1;
}//end doInstruction
////////////The second function//////////////////////////////
int receiveMessage(SerialPort^ sPort, unique_ptr<unsigned char[]> &outData){<<--the
unique_ptr being passed by
reference so that data may
returned
int length;
int stopChecking = 0;
unique_ptr<unsigned char[]> mData; <<--I create a temporary unique_ptr
that I will work with within this
function
String^ output = "";
int insReceived = 0; //starts at 0 so if everything is working
it will not change into a 1
mData = unique_ptr<unsigned char[]>(new unsigned char[2]);
^^--initialize the unique_ptr to store 2 bytes
while(stopChecking == 0){
stopChecking = findStartChar(mData,sPort);
}//end while
if(stopChecking == 1){
output = gatherOutput(mData,2);//generating console output
mData = unique_ptr<unsigned char[]>(new unsigned char[3]);
^^--discard old data and resize to store 3 bytes of data
length = readLength(mData,sPort);<<--this seems to be working fine
if(length > 0){
if(!getSum(mData,sPort,3)){
output = output + "," + gatherOutput(mData,3);//console output
mData = unique_ptr<unsigned char[]>(new unsigned char[length+1]);
^^--discard old data and resize to store a generated
number of bytes of data
if(readData(mData,sPort,length+1) == 1){
if(!getSum(mData,sPort,length+1)){
output = output+","+gatherOutput(mData,length+1);
Console::WriteLine(output);
mData[length+1] = length;
outData = move(mData);<<--memory leak occurs here
first when this function
is called a second time
insReceived = length*10;
}else{
cout << "parity error\n";
insReceived = 3;
}//end if
}else{
}//end if
}else{
}//end if
}else{
}//end if
}else{
}//end if
return insReceived;
}//end receiveMessage
我是否滥用unique_ptr类型？或者我忘了它的用法至关重要的东西。我尝试在一个更简单的程序中重新创建问题，但它运行时没有泄漏。我一直在使用VLD和微软的检漏仪代码检查泄漏。