没有什么 QThread
但是,API可以手动管理线程的系统名称,但是,由于版本4.8.3,QT将自动将线程名称设置为线程对象的名称(QObject::objectName()
).
这是在实施中处理的 QThread
如下所述。
你有这样的东西 qthread_unix.cpp
:
#if (defined(Q_OS_LINUX) || defined(Q_OS_MAC) || defined(Q_OS_QNX))
static void setCurrentThreadName(pthread_t threadId, const char *name)
{
# if defined(Q_OS_LINUX) && !defined(QT_LINUXBASE)
Q_UNUSED(threadId);
prctl(PR_SET_NAME, (unsigned long)name, 0, 0, 0);
# elif defined(Q_OS_MAC)
Q_UNUSED(threadId);
pthread_setname_np(name);
# elif defined(Q_OS_QNX)
pthread_setname_np(threadId, name);
# endif
}
#endif
/*
* [...]
*/
QString objectName = thr->objectName();
if (Q_LIKELY(objectName.isEmpty()))
setCurrentThreadName(thr->d_func()->thread_id, thr->metaObject()->className());
else
setCurrentThreadName(thr->d_func()->thread_id, objectName.toLocal8Bit());
以及等同于 qthread_win.cpp
:
typedef struct tagTHREADNAME_INFO
{
DWORD dwType; // must be 0x1000
LPCSTR szName; // pointer to name (in user addr space)
HANDLE dwThreadID; // thread ID (-1=caller thread)
DWORD dwFlags; // reserved for future use, must be zero
} THREADNAME_INFO;
void qt_set_thread_name(HANDLE threadId, LPCSTR threadName)
{
THREADNAME_INFO info;
info.dwType = 0x1000;
info.szName = threadName;
info.dwThreadID = threadId;
info.dwFlags = 0;
__try
{
RaiseException(0x406D1388, 0, sizeof(info)/sizeof(DWORD), (const ULONG_PTR*)&info);
}
__except (EXCEPTION_CONTINUE_EXECUTION)
{
}
}
/*
* [...]
*/
QByteArray objectName = thr->objectName().toLocal8Bit();
qt_set_thread_name((HANDLE)-1, objectName.isEmpty() ? thr->metaObject()->className() : objectName.constData());
请注意,在Windows上,如果以上代码将不会执行 QT_NO_DEBUG
设置,因此 它不起作用 发布 模式.