diff options
| -rw-r--r-- | include/qemu/timer.h | 11 | ||||
| -rw-r--r-- | qemu-timer.c | 14 |
2 files changed, 22 insertions, 3 deletions
diff --git a/include/qemu/timer.h b/include/qemu/timer.h index 9a3504c900..ca5befba0e 100644 --- a/include/qemu/timer.h +++ b/include/qemu/timer.h @@ -595,6 +595,17 @@ static inline QEMUTimer *timer_new_ms(QEMUClockType type, QEMUTimerCB *cb, } /** + * timer_deinit: + * @ts: the timer to be de-initialised + * + * Deassociate the timer from any timerlist. You should + * call timer_del before. After this call, any further + * timer_del call cannot cause dangling pointer accesses + * even if the previously used timerlist is freed. + */ +void timer_deinit(QEMUTimer *ts); + +/** * timer_free: * @ts: the timer * diff --git a/qemu-timer.c b/qemu-timer.c index 98d9d1bc0b..464396f7d0 100644 --- a/qemu-timer.c +++ b/qemu-timer.c @@ -342,6 +342,12 @@ void timer_init_tl(QEMUTimer *ts, ts->expire_time = -1; } +void timer_deinit(QEMUTimer *ts) +{ + assert(ts->expire_time == -1); + ts->timer_list = NULL; +} + void timer_free(QEMUTimer *ts) { g_free(ts); @@ -398,9 +404,11 @@ void timer_del(QEMUTimer *ts) { QEMUTimerList *timer_list = ts->timer_list; - qemu_mutex_lock(&timer_list->active_timers_lock); - timer_del_locked(timer_list, ts); - qemu_mutex_unlock(&timer_list->active_timers_lock); + if (timer_list) { + qemu_mutex_lock(&timer_list->active_timers_lock); + timer_del_locked(timer_list, ts); + qemu_mutex_unlock(&timer_list->active_timers_lock); + } } /* modify the current timer so that it will be fired when current_time |