STL hashmap crashing

[Subrat Patnaik]

hi all, i have a service application, which maintains a record of each and every USB being used in the windows system. in brief, my problem is with the hashmap values getting corrupted in between two threads. one thread picks the database path where values are to be written and other thread writes into that database path. Service crashes at the, when the below codes are executed. WaitForSingleObject(*hThreadIterBegin->second,INFINITE); rename(hThreadIterBegin->first->c_str(),newFileName.c_str()); ReleaseMutex(*hThreadIterBegin->second); The first thread fetches the values and the values are sent to the second thread so that it can write the necessary things to the fetched value which is the path of the database. but the hashmap value crashes at some point due to which the service crahses at above code executions. i am not able to identify the exact reason, as to why the value of ThreadMutexMapPrimary changes or crashes when it is called from the second thread??? i am attaching the code below, with declarations and values i received while debugging. Thankyou.

**************************

Variable declarations

---

cahr queryFile[256];

string queryFileString;

int currentMap;

hash_map ThreadMutexMapPrimary;

hash_map ::iterator hThreadIterBegin;

hash_map ::iterator hThreadIterEnd;

**************************

**********************************************************************************************

FUNCTION CALL

---

In 1st Thread:-> For fetching

string queryFileString = queryFile;

HANDLE presentMutex = CreateMutex(NULL,FALSE,NULL);

if(presentMutex == NULL)

{

	WriteLog("Error Creating Mutex");

}

else

	if(currentMap == 1)

		ThreadMutexMapPrimary.insert(hash\_map ::value\_type(&queryFileString,&presentMutex));

	else

		ThreadMutexMapSecondary.insert(hash\_map ::value\_type(&queryFileString,&presentMutex));

In 2nd Thread:-> For writing values

switch(currentMap)

	{

	case 1:

		if(ThreadMutexMapPrimary.empty())

		{

			WriteLog("Hash Map Empty No record to Write");

			break;

		}

		hThreadIterBegin =  ThreadMutexMapPrimary.begin();

		hThreadIterEnd = ThreadMutexMapPrimary.end();

		currentMap = 2;

		currentMappingSetReplaced = true;

		break;

	case 2:

		if(Thre

[Roger Allen]

Your problem seems to possibly be related to an issue we saw in our own software. Switching to an alternate STL provider fixed our issues. See http://support.microsoft.com/kb/813810[^] You may well be being affected by this. BTW we switched to STLport a free STL implementation.

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