C++ pthread_set_name_np函数代码示例

static int Sys_SetThreadName( pthread_t handle, const char* name )
{
    int ret = 0;
#ifdef __linux__
    // NOTE: linux only supports threadnames up to 16chars *including* terminating NULL
    // http://man7.org/linux/man-pages/man3/pthread_setname_np.3.html
    // on my machine a longer name (eg "JobListProcessor_0") caused an ENOENT error (instead of ERANGE)
    assert( strlen( name ) < 16 );

    ret = pthread_setname_np( handle, name );
    if( ret != 0 )
        idLib::common->Printf( "Setting threadname \"%s\" failed, reason: %s (%i)\n", name, strerror( errno ), errno );
#elif defined(__FreeBSD__)
    // according to http://www.freebsd.org/cgi/man.cgi?query=pthread_set_name_np&sektion=3
    // the interface is void pthread_set_name_np(pthread_t tid, const char *name);
    pthread_set_name_np( handle, name ); // doesn't return anything
#endif
    /* TODO: OSX:
    	// according to http://stackoverflow.com/a/7989973
    	// this needs to be called in the thread to be named!
    	ret = pthread_setname_np(name);

    	// so we'd have to wrap the xthread_t function in Sys_CreateThread and set the name in the wrapping function...
    */

    return ret;
}

Error ThreadPosix::set_name_func_posix(const String& p_name) {

	pthread_t running_thread = pthread_self();

	#ifdef PTHREAD_NO_RENAME
	return ERR_UNAVAILABLE;

	#else

	#ifdef PTHREAD_RENAME_SELF

	// check if thread is the same as caller
	int err = pthread_setname_np(p_name.utf8().get_data());
	
	#else

	#ifdef PTHREAD_BSD_SET_NAME
	pthread_set_name_np(running_thread, p_name.utf8().get_data());
	int err = 0; // Open/FreeBSD ignore errors in this function
	#else
	int err = pthread_setname_np(running_thread, p_name.utf8().get_data());
	#endif // PTHREAD_BSD_SET_NAME

	#endif // PTHREAD_RENAME_SELF

	return err == 0 ? OK : ERR_INVALID_PARAMETER;

	#endif // PTHREAD_NO_RENAME
};

void
js::ThisThread::SetName(const char* name)
{
  MOZ_RELEASE_ASSERT(name);

#if (defined(__APPLE__) && defined(__MACH__)) || defined(__linux__)
  // On linux and OS X the name may not be longer than 16 bytes, including
  // the null terminator. Truncate the name to 15 characters.
  char nameBuf[16];

  strncpy(nameBuf, name, sizeof nameBuf - 1);
  nameBuf[sizeof nameBuf - 1] = '\0';
  name = nameBuf;
#endif

  int rv;
#ifdef XP_DARWIN
  rv = pthread_setname_np(name);
#elif defined(__DragonFly__) || defined(__FreeBSD__) || defined(__OpenBSD__)
  pthread_set_name_np(pthread_self(), name);
  rv = 0;
#elif defined(__NetBSD__)
  rv = pthread_setname_np(pthread_self(), "%s", (void*)name);
#else
  rv = pthread_setname_np(pthread_self(), name);
#endif
  MOZ_RELEASE_ASSERT(!rv);
}

/* Thread: main */
int
library_init(void)
{
  int i;
  int ret;

  scan_exit = false;
  scanning = false;

  CHECK_NULL(L_LIB, evbase_lib = event_base_new());
  CHECK_NULL(L_LIB, updateev = evtimer_new(evbase_lib, update_trigger_cb, NULL));

  for (i = 0; sources[i]; i++)
    {
      if (!sources[i]->init)
	continue;

      ret = sources[i]->init();
      if (ret < 0)
	sources[i]->disabled = 1;
    }

  CHECK_NULL(L_LIB, cmdbase = commands_base_new(evbase_lib, NULL));

  CHECK_ERR(L_LIB, pthread_create(&tid_library, NULL, library, NULL));

#if defined(HAVE_PTHREAD_SETNAME_NP)
  pthread_setname_np(tid_library, "library");
#elif defined(HAVE_PTHREAD_SET_NAME_NP)
  pthread_set_name_np(tid_library, "library");
#endif

  return 0;
}

void
SDL_SYS_SetupThread(const char *name)
{
    int i;
    sigset_t mask;

    if (name != NULL) {
#if ( (__MACOSX__ && (MAC_OS_X_VERSION_MAX_ALLOWED >= 1060)) || \
      (__IPHONEOS__ && (__IPHONE_OS_VERSION_MAX_ALLOWED >= 30200)) )
        if (pthread_setname_np != NULL) {
            pthread_setname_np(name);
        }
#elif HAVE_PTHREAD_SETNAME_NP
        pthread_setname_np(pthread_self(), name);
#elif HAVE_PTHREAD_SET_NAME_NP
        pthread_set_name_np(pthread_self(), name);
#endif
    }

    /* Mask asynchronous signals for this thread */
    sigemptyset(&mask);
    for (i = 0; sig_list[i]; ++i) {
        sigaddset(&mask, sig_list[i]);
    }
    pthread_sigmask(SIG_BLOCK, &mask, 0);

#ifdef PTHREAD_CANCEL_ASYNCHRONOUS
    /* Allow ourselves to be asynchronously cancelled */
    {
        int oldstate;
        pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, &oldstate);
    }
#endif
}

static void *
thread_wrapper ( void *p )
{
  struct thread_state *ts = p;
  sigset_t set;

#if defined(PLATFORM_LINUX)
  /* Set name */
  prctl(PR_SET_NAME, ts->name);
#elif defined(PLATFORM_FREEBSD)
  /* Set name of thread */
  pthread_set_name_np(pthread_self(), ts->name);
#elif defined(PLATFORM_DARWIN)
  pthread_setname_np(ts->name);
#endif

  sigemptyset(&set);
  sigaddset(&set, SIGTERM);
  pthread_sigmask(SIG_UNBLOCK, &set, NULL);

  signal(SIGTERM, doexit);

  /* Run */
  tvhtrace("thread", "created thread %ld [%s / %p(%p)]",
           (long)pthread_self(), ts->name, ts->run, ts->arg);
  void *r = ts->run(ts->arg);
  free(ts);

  return r;
}

void * Thread::entryPoint(void * param) {
	
	Thread & thread = *((Thread *)param);
	
	// Set the thread name.
#if ARX_HAVE_PTHREAD_SETNAME_NP && ARX_PLATFORM != ARX_PLATFORM_MACOSX
	// Linux
	pthread_setname_np(thread.thread, thread.threadName.c_str());
#elif ARX_HAVE_PTHREAD_SETNAME_NP && ARX_PLATFORM == ARX_PLATFORM_MACOSX
	// Mac OS X
	pthread_setname_np(thread.threadName.c_str());
#elif ARX_HAVE_PTHREAD_SET_NAME_NP
	// FreeBSD & OpenBSD
	pthread_set_name_np(thread.thread, thread.threadName.c_str());
#elif ARX_HAVE_PRCTL && defined(PR_SET_NAME)
	// Linux
	prctl(PR_SET_NAME, reinterpret_cast<unsigned long>(thread.threadName.c_str()), 0, 0, 0);
#else
	// This is non-fatal, but let's print a warning so future ports will be
	// reminded to implement it.
	#pragma message ( "No function available to set thread names!" )
#endif
	
	CrashHandler::registerThreadCrashHandlers();
	profiler::registerThread(thread.threadName);
	thread.run();
	profiler::unregisterThread();
	CrashHandler::unregisterThreadCrashHandlers();
	return NULL;
}

void zmq::thread_t::setThreadName(const char *name_)
{
/* The thread name is a cosmetic string, added to ease debugging of
 * multi-threaded applications. It is not a big issue if this value
 * can not be set for any reason (such as Permission denied in some
 * cases where the application changes its EUID, etc.) The value of
 * "int rc" is retained where available, to help debuggers stepping
 * through code to see its value - but otherwise it is ignored.
 */
    if (!name_)
        return;

#if defined(ZMQ_HAVE_PTHREAD_SETNAME_1)
    int rc = pthread_setname_np(name_);
    if(rc) return;
#elif defined(ZMQ_HAVE_PTHREAD_SETNAME_2)
    int rc = pthread_setname_np(descriptor, name_);
    if(rc) return;
#elif defined(ZMQ_HAVE_PTHREAD_SETNAME_3)
    int rc = pthread_setname_np(descriptor, name_, NULL);
    if(rc) return;
#elif defined(ZMQ_HAVE_PTHREAD_SET_NAME)
    pthread_set_name_np(descriptor, name_);
#endif
}

R_API bool r_th_setname(RThread *th, const char *name) {
#if defined(HAVE_PTHREAD_NP) && HAVE_PTHREAD_NP
#if __linux__
	if (pthread_setname_np (th->tid, name) != 0) {
		eprintf ("Failed to set thread name\n");
		return false;
	}	

	return true;
#elif __FreeBSD__ || __OpenBSD__ || __DragonFly__
	pthread_set_name_np (th->tid, name);
	return true;
#elif __NetBSD__
	if (pthread_setname_np (th->tid, "%s", (void *)name) != 0) {
		eprintf ("Failed to set thread name\n");
		return false;
	}	

	return true;
#else
#pragma message("warning r_th_setname not implemented")
#endif
#else
	return true;
#endif
}

void SetThisProcessName(const char *aName)
{
#if defined(OS_NETBSD)
  pthread_setname_np(pthread_self(), "%s", (void *)aName);
#else
  pthread_set_name_np(pthread_self(), aName);
#endif
}

void
THR_SetName(const char *name)
{

	AZ(pthread_setspecific(name_key, name));
#ifdef HAVE_PTHREAD_SET_NAME_NP
	pthread_set_name_np(pthread_self(), name);
#endif
}

void CThread::SetThreadInfo()
{
#ifdef TARGET_FREEBSD
#if __FreeBSD_version < 900031
  long lwpid;
  thr_self(&lwpid);
  m_ThreadOpaque.LwpId = lwpid;
#else
  m_ThreadOpaque.LwpId = pthread_getthreadid_np();
#endif
#elif defined(TARGET_ANDROID)
  m_ThreadOpaque.LwpId = gettid();
#else
  m_ThreadOpaque.LwpId = syscall(SYS_gettid);
#endif

#if defined(HAVE_PTHREAD_SETNAME_NP)
#ifdef TARGET_DARWIN
#if(__MAC_OS_X_VERSION_MIN_REQUIRED >= 1060 || __IPHONE_OS_VERSION_MIN_REQUIRED >= 30200)
  pthread_setname_np(m_ThreadName.c_str());
#endif
#else
  pthread_setname_np(m_ThreadId, m_ThreadName.c_str());
#endif
#elif defined(HAVE_PTHREAD_SET_NAME_NP)
  pthread_set_name_np(m_ThreadId, m_ThreadName.c_str());
#endif
    
#ifdef RLIMIT_NICE
  // get user max prio
  struct rlimit limit;
  int userMaxPrio;
  if (getrlimit(RLIMIT_NICE, &limit) == 0)
  {
    userMaxPrio = limit.rlim_cur - 20;
    if (userMaxPrio < 0)
      userMaxPrio = 0;
  }
  else
    userMaxPrio = 0;

  if (geteuid() == 0)
    userMaxPrio = GetMaxPriority();

  // if the user does not have an entry in limits.conf the following
  // call will fail
  if (userMaxPrio > 0)
  {
    // start thread with nice level of appication
    int appNice = getpriority(PRIO_PROCESS, getpid());
    if (setpriority(PRIO_PROCESS, m_ThreadOpaque.LwpId, appNice) != 0)
      if (logger) logger->Log(LOGERROR, "%s: error %s", __FUNCTION__, strerror(errno));
  }
#endif
}

void
SDL_SYS_SetupThread(const char *name)
{
#if !defined(__ANDROID__) && !defined(__NACL__)
    int i;
    sigset_t mask;
#endif /* !__ANDROID__ && !__NACL__ */

    if (name != NULL) {
        #if defined(__MACOSX__) || defined(__IPHONEOS__) || defined(__LINUX__)
        SDL_assert(checked_setname);
        if (ppthread_setname_np != NULL) {
            #if defined(__MACOSX__) || defined(__IPHONEOS__)
            ppthread_setname_np(name);
            #elif defined(__LINUX__)
            ppthread_setname_np(pthread_self(), name);
            #endif
        }
        #elif HAVE_PTHREAD_SETNAME_NP
            #if defined(__NETBSD__)
            pthread_setname_np(pthread_self(), "%s", name);
            #else
            pthread_setname_np(pthread_self(), name);
            #endif
        #elif HAVE_PTHREAD_SET_NAME_NP
            pthread_set_name_np(pthread_self(), name);
        #elif defined(__HAIKU__)
            /* The docs say the thread name can't be longer than B_OS_NAME_LENGTH. */
            char namebuf[B_OS_NAME_LENGTH];
            SDL_snprintf(namebuf, sizeof (namebuf), "%s", name);
            namebuf[sizeof (namebuf) - 1] = '\0';
            rename_thread(find_thread(NULL), namebuf);
        #endif
    }

   /* NativeClient does not yet support signals.*/
#if !defined(__ANDROID__) && !defined(__NACL__)
    /* Mask asynchronous signals for this thread */
    sigemptyset(&mask);
    for (i = 0; sig_list[i]; ++i) {
        sigaddset(&mask, sig_list[i]);
    }
    pthread_sigmask(SIG_BLOCK, &mask, 0);
#endif /* !__ANDROID__ && !__NACL__ */


#ifdef PTHREAD_CANCEL_ASYNCHRONOUS
    /* Allow ourselves to be asynchronously cancelled */
    {
        int oldstate;
        pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, &oldstate);
    }
#endif
}

 void setCurrentThreadName(const std::string &name) {
  #if defined (__linux__) && !defined(ANDROID)
   prctl(PR_SET_NAME, name.c_str(), 0, 0, 0);
  #elif defined (__APPLE__)
   pthread_setname_np(name.c_str());
  #elif defined (ANDROID)
   //no implementation under Android
  #else
   //BSD, whatever...
   pthread_set_name_np(pthread_self(), name.c_str());
  #endif
 }

void
sctp_userspace_set_threadname(const char *name)
{
#if defined(__Userspace_os_Darwin)
	pthread_setname_np(name);
#endif
#if defined(__Userspace_os_Linux)
	prctl(PR_SET_NAME, name);
#endif
#if defined(__Userspace_os_FreeBSD)
	pthread_set_name_np(pthread_self(), name);
#endif
}