Set the concurrency level for a thread
#include <pthread.h> int pthread_setconcurrency( int new_level );
Use the -l c option to qcc to link against this library. This library is usually included automatically.
QNX Neutrino doesn't support the multiplexing of user threads on top of several kernel scheduled entities. As such, the pthread_setconcurrency() and pthread_getconcurrency() functions are provided for source code compatibility but they have no effect when called. To maintain the function semantics, the new_level parameter is saved when pthread_setconcurrency() is called so that a subsequent call to pthread_getconcurrency() returns the same value.
POSIX 1003.1 XSI