mutex_owned
Checks whether a thread holds the specified kernel mutex.
int mutex_owned(vmlinux`struct mutex *)
The mutex_owned
function returns non-zero if the calling thread holds the
specified kernel mutex, or zero otherwise.
Example 7-28 How to use mutex_owned to check whether the calling thread holds a mutex
fbt::mutex_lock:entry
{
this->mutex = arg0;
}
fbt::mutex_lock:return
{
this->owned = mutex_owned((struct mutex *)this->mutex);
}
fbt::mutex_lock:return
/!this->owned/
{
printf("mutex_owned() returned 0, expected non-zero\n");
exit(1);
}