Function getThreadId

base/common/getThreadId.cpp:18–39

static thread_local uint64_t current_tid = 0;
uint64_t getThreadId()
{
    if (!current_tid)
    {
#if defined(OS_ANDROID)
        current_tid = gettid();
#elif defined(OS_LINUX)
        current_tid = syscall(SYS_gettid); /// This call is always successful. - man gettid
#elif defined(OS_FREEBSD)
        current_tid = pthread_getthreadid_np();
#elif defined(OS_SUNOS)
        // On Solaris-derived systems, this returns the ID of the LWP, analogous
        // to a thread.
        current_tid = static_cast<uint64_t>(pthread_self());
#else
        if (0 != pthread_threadid_np(nullptr, &current_tid))
            throw std::logic_error("pthread_threadid_np returned error");
#endif
    }

    return current_tid;
}