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freebsd_network: Cleanup callout_thread.

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* Reorganize inner loop for clarity and to reduce indentation.
 * Handle callouts that are due at this exact system_time.
 * "break" instead of "continue" if lock fails.
This commit is contained in:
Augustin Cavalier
2023-03-30 13:42:05 -04:00
parent ff6e777d28
commit e6d3d777b2
1 changed files with 36 additions and 36 deletions
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src/libs/compat/freebsd_network/callout.cpp
+36 -36
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@@ -52,45 +52,45 @@ callout_thread(void* /*data*/)
if (c == NULL)
break;
if (c->c_due < system_time()) {
struct mtx *mutex = c->c_mtx;
// execute timer
list_remove_item(&sTimers, c);
if (mutex == NULL)
c->c_due = -1;
sCurrentCallout = c;
mutex_unlock(&sLock);
if (mutex != NULL) {
mtx_lock(mutex);
if (c->c_due < 0) {
mtx_unlock(mutex);
goto done;
}
c->c_due = -1;
}
c->c_func(c->c_arg);
if (mutex != NULL
&& (c->c_flags & CALLOUT_RETURNUNLOCKED) == 0)
mtx_unlock(mutex);
done:
if ((status = mutex_lock(&sLock)) != B_OK)
continue;
sCurrentCallout = NULL;
c = NULL;
// restart scanning as we unlocked the list
} else {
if (c->c_due > system_time()) {
// calculate new timeout
if (c->c_due < timeout)
if (timeout > c->c_due)
timeout = c->c_due;
continue;
}
// execute timer
list_remove_item(&sTimers, c);
struct mtx *c_mtx = c->c_mtx;
if (c_mtx == NULL)
c->c_due = -1;
sCurrentCallout = c;
mutex_unlock(&sLock);
if (c_mtx != NULL) {
mtx_lock(c_mtx);
if (c->c_due < 0) {
mtx_unlock(c_mtx);
goto done;
}
c->c_due = -1;
}
c->c_func(c->c_arg);
if (c_mtx != NULL
&& (c->c_flags & CALLOUT_RETURNUNLOCKED) == 0)
mtx_unlock(c_mtx);
done:
if ((status = mutex_lock(&sLock)) != B_OK)
break;
sCurrentCallout = NULL;
c = NULL;
// restart scanning as we unlocked the list
}
sTimeout = timeout;