Function panda_sys::qemu_lockcnt_lock

pub unsafe extern "C" fn qemu_lockcnt_lock(lockcnt: *mut QemuLockCnt)

qemu_lockcnt_lock: lock a QemuLockCnt’s mutex. @lockcnt: the lockcnt to operate on

Remember that concurrent visits are not blocked unless the count is also zero. You can use qemu_lockcnt_count to check for this inside a critical section.