diff options
Diffstat (limited to 'sysdeps/l4/pt-thread-halt.c')
| -rw-r--r-- | sysdeps/l4/pt-thread-halt.c | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/sysdeps/l4/pt-thread-halt.c b/sysdeps/l4/pt-thread-halt.c index 991123c..aa2bf43 100644 --- a/sysdeps/l4/pt-thread-halt.c +++ b/sysdeps/l4/pt-thread-halt.c @@ -24,8 +24,22 @@ /* Deallocate the kernel thread resources associated with THREAD. */ void -__pthread_thread_halt (struct __pthread *thread) +__pthread_thread_halt (struct __pthread *thread, int need_dealloc) { - l4_stop (thread->threadid); - pthread_pool_add_np (thread->threadid); + l4_thread_id_t tid = thread->threadid; + + if (need_dealloc) + __pthread_dealloc (thread); + + /* There is potential race here: once if TID is the current thread, + then once we add TID to the pool, someone can reallocate it + before we call stop. However, to start the thread, the caller + atomically starts and sets the sp and ip, thus, if the stop has + not yet executed at that point, it won't. */ + + if (tid != l4_myself ()) + l4_stop (tid); + pthread_pool_add_np (tid); + if (tid == l4_myself ()) + l4_stop (tid); } |