[openssl-users] Is CRYPTO_set_locking_callback still needed if mutexes in threads are already being used to prevent race conditions?

[Avery A. Tarasov]

Hi, I am developing a Windows C++ application that uses OpenSSL.

The application has 2 threads created by CreateThread that perform SSL 
functions such as connecting to a website over HTTPS and 
sending/receiving data

I am already using a mutex  to prevent race conditions, like this:

static HANDLE sslmutex=0;  // global variable at top of file

*inside thread #1:*
while(1)
{
     WaitForSingleObject(sslmutex,INFINITE);
     DoSsl();
     ReleaseMutex(sslmutex);
     Sleep(1000);
}

*inside thread #2:*

while(1)
{
     WaitForSingleObject(sslmutex,INFINITE);
     DoSsl();
     ReleaseMutex(sslmutex);
     Sleep(1000);
}

All SSL related code is in the DoSsl function including 
SSL_library_init(), sending/receiving data, and necessary clean up 
operations.

Is it still necessary for me to use CRYPTO_set_locking_callback or is my 
code already thread safe?

Any assistance greatly appreciated.

Best Regards,

-Avery


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