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Small optimization of the timer mechanism: the timeout is no longer updated

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if not really necessary; ie. you can now add timers without an extra performance
hit if it's not really required.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19354 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Axel Dörfler 2006-11-21 23:20:41 +00:00
parent 1da73a7b9b
commit 390422241e
1 changed files with 7 additions and 3 deletions
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10
src/add-ons/kernel/network/stack/utility.cpp
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@ -21,6 +21,7 @@ static struct list sTimers;
static benaphore sTimerLock;
static sem_id sTimerWaitSem;
static thread_id sTimerThread;
static bigtime_t sTimerTimeout;
uint16
@ -256,6 +257,7 @@ timer_thread(void * /*data*/)
}
}
sTimerTimeout = timeout;
benaphore_unlock(&sTimerLock);
}
@ -307,10 +309,11 @@ set_timer(net_timer *timer, bigtime_t delay)
// add this timer
timer->due = system_time() + delay;
list_add_item(&sTimers, timer);
}
// notify timer about the change
release_sem(sTimerWaitSem);
// notify timer about the change if necessary
if (sTimerTimeout > timer->due)
release_sem(sTimerWaitSem);
}
}
@ -318,6 +321,7 @@ status_t
init_timers(void)
{
list_init(&sTimers);
sTimerTimeout = B_INFINITE_TIMEOUT;
status_t status = benaphore_init(&sTimerLock, "net timer");
if (status < B_OK)