diff options
Diffstat (limited to 'src/corelib/thread/qthread_unix.cpp')
| -rw-r--r-- | src/corelib/thread/qthread_unix.cpp | 28 |
1 files changed, 24 insertions, 4 deletions
diff --git a/src/corelib/thread/qthread_unix.cpp b/src/corelib/thread/qthread_unix.cpp index 62f0179802..efa3cb944e 100644 --- a/src/corelib/thread/qthread_unix.cpp +++ b/src/corelib/thread/qthread_unix.cpp @@ -415,16 +415,36 @@ void QThreadPrivate::finish(void *arg) } - - /************************************************************************** ** QThread *************************************************************************/ -Qt::HANDLE QThread::currentThreadId() noexcept +/* + Since each thread is guaranteed to have its own copy of + currenThreadData, the address is guaranteed to be unique for each + running thread (but likely to be reused for newly started threads). + + CI tests fails on ARM architectures if we try to use the assembler, + or the address of the thread_local (even with a recent gcc version), so + stick to the pthread version there. The assembler would be + + // http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0344k/Babeihid.html + asm volatile ("mrc p15, 0, %0, c13, c0, 3" : "=r" (tid)); + + and + + // see glibc/sysdeps/aarch64/nptl/tls.h + asm volatile ("mrs %0, tpidr_el0" : "=r" (tid)); + + for 32 and 64bit versions, respectively. +*/ +Qt::HANDLE QThread::currentThreadIdImpl() noexcept { - // requires a C cast here otherwise we run into trouble on AIX +#if defined(Q_PROCESSOR_ARM) return to_HANDLE(pthread_self()); +#else + return ¤tThreadData; +#endif } #if defined(QT_LINUXBASE) && !defined(_SC_NPROCESSORS_ONLN) |