I'm obtaining this link error and I cannot find the solution. Can you maybe put me in the right direction where to search for it? I get: error LNK2019: unresolved external symbol _imp_pthread_mutex_lock referenced in function "private: bool __thiscall... here comes the whole name of my function with parameters. pthread_mutex_lock and pthread_mutex_unlock are used in this function (not as arguments). Including "pthread.h" doesn't change anything.
The pthread library is for POSIX systems (Linux, BSD, Mac OS). You indicated that you're on Visual Studio in Windows - if you are looking to do multithreading on Windows, see this page.
Better yet, if you can use more recent tools, C++11 offers built-in threading functionality.