/**
* virObjectEventCallbackListRemoveID:
* @conn: pointer to the connection
* @cbList: the list
* @callback: the callback to remove
*
* Internal function to remove a callback from a virObjectEventCallbackListPtr
*/
static int
virObjectEventCallbackListRemoveID(virConnectPtr conn,
virObjectEventCallbackListPtr cbList,
int callbackID)
{
size_t i;
for (i = 0; i < cbList->count; i++) {
virObjectEventCallbackPtr cb = cbList->callbacks[i];
if (cb->callbackID == callbackID && cb->conn == conn) {
int ret;
ret = cb->filter ? 0 :
(virObjectEventCallbackListCount(conn, cbList, cb->klass,
cb->eventID,
cb->key_filter ? cb->key : NULL,
cb->remoteID >= 0) - 1);
if (cb->freecb)
(*cb->freecb)(cb->opaque);
virObjectEventCallbackFree(cb);
VIR_DELETE_ELEMENT(cbList->callbacks, i, cbList->count);
return ret;
}
}
virReportError(VIR_ERR_INVALID_ARG,
_("could not find event callback %d for deletion"),
callbackID);
return -1;
}
static int
virObjectEventCallbackListPurgeMarked(virObjectEventCallbackListPtr cbList)
{
size_t n;
for (n = 0; n < cbList->count; n++) {
if (cbList->callbacks[n]->deleted) {
virFreeCallback freecb = cbList->callbacks[n]->freecb;
if (freecb)
(*freecb)(cbList->callbacks[n]->opaque);
virObjectEventCallbackFree(cbList->callbacks[n]);
VIR_DELETE_ELEMENT(cbList->callbacks, n, cbList->count);
n--;
}
}
return 0;
}
/**
* virObjectEventCallbackListRemoveID:
* @conn: pointer to the connection
* @cbList: the list
* @callback: the callback to remove
* @doFreeCb: Inhibit calling the freecb
*
* Internal function to remove a callback from a virObjectEventCallbackListPtr
*/
static int
virObjectEventCallbackListRemoveID(virConnectPtr conn,
virObjectEventCallbackListPtr cbList,
int callbackID,
bool doFreeCb)
{
size_t i;
for (i = 0; i < cbList->count; i++) {
virObjectEventCallbackPtr cb = cbList->callbacks[i];
if (cb->callbackID == callbackID && cb->conn == conn) {
int ret;
ret = cb->filter ? 0 :
(virObjectEventCallbackListCount(conn, cbList, cb->klass,
cb->eventID,
cb->key_filter ? cb->key : NULL,
cb->remoteID >= 0) - 1);
/* @doFreeCb inhibits calling @freecb from error paths in
* register functions to ensure the caller of a failed register
* function won't end up with a double free error */
if (doFreeCb && cb->freecb)
(*cb->freecb)(cb->opaque);
virObjectEventCallbackFree(cb);
VIR_DELETE_ELEMENT(cbList->callbacks, i, cbList->count);
return ret;
}
}
virReportError(VIR_ERR_INVALID_ARG,
_("could not find event callback %d for deletion"),
callbackID);
return -1;
}
/**
* virObjectEventCallbackListAddID:
* @conn: pointer to the connection
* @cbList: the list
* @key: the optional key of the object to filter on
* @filter: optional last-ditch filter callback
* @filter_opaque: opaque data to pass to @filter
* @klass: the base event class
* @eventID: the event ID
* @callback: the callback to add
* @opaque: opaque data to pass to @callback
* @freecb: callback to free @opaque
* @legacy: true if callback is tracked by function instead of callbackID
* @callbackID: filled with callback ID
* @serverFilter: true if server supports object filtering
*
* Internal function to add a callback from a virObjectEventCallbackListPtr
*/
static int
virObjectEventCallbackListAddID(virConnectPtr conn,
virObjectEventCallbackListPtr cbList,
const char *key,
virObjectEventCallbackFilter filter,
void *filter_opaque,
virClassPtr klass,
int eventID,
virConnectObjectEventGenericCallback callback,
void *opaque,
virFreeCallback freecb,
bool legacy,
int *callbackID,
bool serverFilter)
{
virObjectEventCallbackPtr cb;
int ret = -1;
int remoteID = -1;
VIR_DEBUG("conn=%p cblist=%p key=%p filter=%p filter_opaque=%p "
"klass=%p eventID=%d callback=%p opaque=%p "
"legacy=%d callbackID=%p serverFilter=%d",
conn, cbList, key, filter, filter_opaque, klass, eventID,
callback, opaque, legacy, callbackID, serverFilter);
/* Check incoming */
if (!cbList)
return -1;
/* If there is no additional filtering, then check if we already
* have this callback on our list. */
if (!filter &&
virObjectEventCallbackLookup(conn, cbList, key,
klass, eventID, callback, legacy,
serverFilter ? &remoteID : NULL) != -1) {
virReportError(VIR_ERR_INVALID_ARG, "%s",
_("event callback already tracked"));
return -1;
}
/* Allocate new cb */
if (VIR_ALLOC(cb) < 0)
goto cleanup;
cb->conn = virObjectRef(conn);
*callbackID = cb->callbackID = cbList->nextID++;
cb->cb = callback;
cb->klass = klass;
cb->eventID = eventID;
cb->opaque = opaque;
cb->freecb = freecb;
cb->remoteID = remoteID;
if (key) {
cb->key_filter = true;
if (VIR_STRDUP(cb->key, key) < 0)
goto cleanup;
}
cb->filter = filter;
cb->filter_opaque = filter_opaque;
cb->legacy = legacy;
if (VIR_APPEND_ELEMENT(cbList->callbacks, cbList->count, cb) < 0)
goto cleanup;
/* When additional filtering is being done, every client callback
* is matched to exactly one server callback. */
if (filter) {
ret = 1;
} else {
ret = virObjectEventCallbackListCount(conn, cbList, klass, eventID,
key, serverFilter);
if (serverFilter && remoteID < 0)
ret++;
}
cleanup:
virObjectEventCallbackFree(cb);
return ret;
}
