void virEventPollUpdateTimeout(int timer, int frequency)
{
unsigned long long now;
int i;
PROBE(EVENT_POLL_UPDATE_TIMEOUT,
"timer=%d frequency=%d",
timer, frequency);
if (timer <= 0) {
VIR_WARN("Ignoring invalid update timer %d", timer);
return;
}
if (virTimeMillisNow(&now) < 0) {
return;
}
virMutexLock(&eventLoop.lock);
for (i = 0 ; i < eventLoop.timeoutsCount ; i++) {
if (eventLoop.timeouts[i].timer == timer) {
eventLoop.timeouts[i].frequency = frequency;
eventLoop.timeouts[i].expiresAt =
frequency >= 0 ? frequency + now : 0;
virEventPollInterruptLocked();
break;
}
}
virMutexUnlock(&eventLoop.lock);
}
/*
* Unregister a callback for a timer
* NB, it *must* be safe to call this from within a callback
* For this reason we only ever set a flag in the existing list.
* Actual deletion will be done out-of-band
*/
int virEventPollRemoveTimeout(int timer) {
int i;
PROBE(EVENT_POLL_REMOVE_TIMEOUT,
"timer=%d",
timer);
if (timer <= 0) {
VIR_WARN("Ignoring invalid remove timer %d", timer);
return -1;
}
virMutexLock(&eventLoop.lock);
for (i = 0 ; i < eventLoop.timeoutsCount ; i++) {
if (eventLoop.timeouts[i].deleted)
continue;
if (eventLoop.timeouts[i].timer == timer) {
eventLoop.timeouts[i].deleted = 1;
virEventPollInterruptLocked();
virMutexUnlock(&eventLoop.lock);
return 0;
}
}
virMutexUnlock(&eventLoop.lock);
return -1;
}
/*
* Unregister a callback from a file handle
* NB, it *must* be safe to call this from within a callback
* For this reason we only ever set a flag in the existing list.
* Actual deletion will be done out-of-band
*/
int virEventPollRemoveHandle(int watch) {
int i;
PROBE(EVENT_POLL_REMOVE_HANDLE,
"watch=%d",
watch);
if (watch <= 0) {
VIR_WARN("Ignoring invalid remove watch %d", watch);
return -1;
}
virMutexLock(&eventLoop.lock);
for (i = 0 ; i < eventLoop.handlesCount ; i++) {
if (eventLoop.handles[i].deleted)
continue;
if (eventLoop.handles[i].watch == watch) {
EVENT_DEBUG("mark delete %d %d", i, eventLoop.handles[i].fd);
eventLoop.handles[i].deleted = 1;
virEventPollInterruptLocked();
virMutexUnlock(&eventLoop.lock);
return 0;
}
}
virMutexUnlock(&eventLoop.lock);
return -1;
}
void virEventPollUpdateHandle(int watch, int events) {
int i;
bool found = false;
PROBE(EVENT_POLL_UPDATE_HANDLE,
"watch=%d events=%d",
watch, events);
if (watch <= 0) {
VIR_WARN("Ignoring invalid update watch %d", watch);
return;
}
virMutexLock(&eventLoop.lock);
for (i = 0; i < eventLoop.handlesCount; i++) {
if (eventLoop.handles[i].watch == watch) {
eventLoop.handles[i].events =
virEventPollToNativeEvents(events);
virEventPollInterruptLocked();
found = true;
break;
}
}
virMutexUnlock(&eventLoop.lock);
if (!found)
VIR_WARN("Got update for non-existent handle watch %d", watch);
}
/*
* Register a callback for a timer event
* NB, it *must* be safe to call this from within a callback
* For this reason we only ever append to existing list.
*/
int virEventPollAddTimeout(int frequency,
virEventTimeoutCallback cb,
void *opaque,
virFreeCallback ff)
{
unsigned long long now;
int ret;
if (virTimeMillisNow(&now) < 0) {
return -1;
}
virMutexLock(&eventLoop.lock);
if (eventLoop.timeoutsCount == eventLoop.timeoutsAlloc) {
EVENT_DEBUG("Used %zu timeout slots, adding at least %d more",
eventLoop.timeoutsAlloc, EVENT_ALLOC_EXTENT);
if (VIR_RESIZE_N(eventLoop.timeouts, eventLoop.timeoutsAlloc,
eventLoop.timeoutsCount, EVENT_ALLOC_EXTENT) < 0) {
virMutexUnlock(&eventLoop.lock);
return -1;
}
}
eventLoop.timeouts[eventLoop.timeoutsCount].timer = nextTimer++;
eventLoop.timeouts[eventLoop.timeoutsCount].frequency = frequency;
eventLoop.timeouts[eventLoop.timeoutsCount].cb = cb;
eventLoop.timeouts[eventLoop.timeoutsCount].ff = ff;
eventLoop.timeouts[eventLoop.timeoutsCount].opaque = opaque;
eventLoop.timeouts[eventLoop.timeoutsCount].deleted = 0;
eventLoop.timeouts[eventLoop.timeoutsCount].expiresAt =
frequency >= 0 ? frequency + now : 0;
eventLoop.timeoutsCount++;
ret = nextTimer-1;
virEventPollInterruptLocked();
PROBE(EVENT_POLL_ADD_TIMEOUT,
"timer=%d frequency=%d cb=%p opaque=%p ff=%p",
ret, frequency, cb, opaque, ff);
virMutexUnlock(&eventLoop.lock);
return ret;
}
/*
* Register a callback for monitoring file handle events.
* NB, it *must* be safe to call this from within a callback
* For this reason we only ever append to existing list.
*/
int virEventPollAddHandle(int fd, int events,
virEventHandleCallback cb,
void *opaque,
virFreeCallback ff)
{
int watch;
virMutexLock(&eventLoop.lock);
if (eventLoop.handlesCount == eventLoop.handlesAlloc) {
EVENT_DEBUG("Used %zu handle slots, adding at least %d more",
eventLoop.handlesAlloc, EVENT_ALLOC_EXTENT);
if (VIR_RESIZE_N(eventLoop.handles, eventLoop.handlesAlloc,
eventLoop.handlesCount, EVENT_ALLOC_EXTENT) < 0) {
virMutexUnlock(&eventLoop.lock);
return -1;
}
}
watch = nextWatch++;
eventLoop.handles[eventLoop.handlesCount].watch = watch;
eventLoop.handles[eventLoop.handlesCount].fd = fd;
eventLoop.handles[eventLoop.handlesCount].events =
virEventPollToNativeEvents(events);
eventLoop.handles[eventLoop.handlesCount].cb = cb;
eventLoop.handles[eventLoop.handlesCount].ff = ff;
eventLoop.handles[eventLoop.handlesCount].opaque = opaque;
eventLoop.handles[eventLoop.handlesCount].deleted = 0;
eventLoop.handlesCount++;
virEventPollInterruptLocked();
PROBE(EVENT_POLL_ADD_HANDLE,
"watch=%d fd=%d events=%d cb=%p opaque=%p ff=%p",
watch, fd, events, cb, opaque, ff);
virMutexUnlock(&eventLoop.lock);
return watch;
}
void virEventPollUpdateTimeout(int timer, int frequency)
{
unsigned long long now;
int i;
bool found = false;
PROBE(EVENT_POLL_UPDATE_TIMEOUT,
"timer=%d frequency=%d",
timer, frequency);
if (timer <= 0) {
VIR_WARN("Ignoring invalid update timer %d", timer);
return;
}
if (virTimeMillisNow(&now) < 0) {
return;
}
virMutexLock(&eventLoop.lock);
for (i = 0; i < eventLoop.timeoutsCount; i++) {
if (eventLoop.timeouts[i].timer == timer) {
eventLoop.timeouts[i].frequency = frequency;
eventLoop.timeouts[i].expiresAt =
frequency >= 0 ? frequency + now : 0;
VIR_DEBUG("Set timer freq=%d expires=%llu", frequency,
eventLoop.timeouts[i].expiresAt);
virEventPollInterruptLocked();
found = true;
break;
}
}
virMutexUnlock(&eventLoop.lock);
if (!found)
VIR_WARN("Got update for non-existent timer %d", timer);
}