Return an integral identifier of the current thread used by the operating system. Note that kernel thread ID is different from the user-space thread ID returned by selfIdAsUint64(). Note that this value is only valid until the thread terminates and may be reused thereafter.
Declared in <bslmt_threadutilimpl_pthread.h>
static
bsls::Types::Uint64
selfKernelIdAsUint64();