#endif
#endif
+/**
+ * Entry in the queue.
+ */
+struct GNUNET_DATASTORE_QueueEntry;
/**
* Handle to the datastore service.
* @param cont continuation to call when done; "success" will be set to
* a positive reservation value if space could be reserved.
* @param cont_cls closure for cont
+ * @return NULL if the entry was not queued, otherwise a handle that can be used to
+ * cancel; note that even if NULL is returned, the callback will be invoked
+ * (or rather, will already have been invoked)
*/
-void
+struct GNUNET_DATASTORE_QueueEntry *
GNUNET_DATASTORE_reserve (struct GNUNET_DATASTORE_Handle *h,
uint64_t amount,
uint32_t entries,
* @param timeout timeout for the operation
* @param cont continuation to call when done
* @param cont_cls closure for cont
+ * @return NULL if the entry was not queued, otherwise a handle that can be used to
+ * cancel; note that even if NULL is returned, the callback will be invoked
+ * (or rather, will already have been invoked)
*/
-void
+struct GNUNET_DATASTORE_QueueEntry *
GNUNET_DATASTORE_put (struct GNUNET_DATASTORE_Handle *h,
int rid,
const GNUNET_HashCode * key,
* @param timeout how long to wait at most for a response
* @param cont continuation to call when done
* @param cont_cls closure for cont
+ * @return NULL if the entry was not queued, otherwise a handle that can be used to
+ * cancel; note that even if NULL is returned, the callback will be invoked
+ * (or rather, will already have been invoked)
*/
-void
+struct GNUNET_DATASTORE_QueueEntry *
GNUNET_DATASTORE_release_reserve (struct GNUNET_DATASTORE_Handle *h,
int rid,
unsigned int queue_priority,
* @param timeout how long to wait at most for a response
* @param cont continuation to call when done
* @param cont_cls closure for cont
+ * @return NULL if the entry was not queued, otherwise a handle that can be used to
+ * cancel; note that even if NULL is returned, the callback will be invoked
+ * (or rather, will already have been invoked)
*/
-void
+struct GNUNET_DATASTORE_QueueEntry *
GNUNET_DATASTORE_update (struct GNUNET_DATASTORE_Handle *h,
unsigned long long uid,
uint32_t priority,
void *cont_cls);
+/**
+ * Explicitly remove some content from the database.
+ * The "cont"inuation will be called with status
+ * "GNUNET_OK" if content was removed, "GNUNET_NO"
+ * if no matching entry was found and "GNUNET_SYSERR"
+ * on all other types of errors.
+ *
+ * @param h handle to the datastore
+ * @param key key for the value
+ * @param size number of bytes in data
+ * @param data content stored
+ * @param queue_priority ranking of this request in the priority queue
+ * @param max_queue_size at what queue size should this request be dropped
+ * (if other requests of higher priority are in the queue)
+ * @param timeout how long to wait at most for a response
+ * @param cont continuation to call when done
+ * @param cont_cls closure for cont
+ * @return NULL if the entry was not queued, otherwise a handle that can be used to
+ * cancel; note that even if NULL is returned, the callback will be invoked
+ * (or rather, will already have been invoked)
+ */
+struct GNUNET_DATASTORE_QueueEntry *
+GNUNET_DATASTORE_remove (struct GNUNET_DATASTORE_Handle *h,
+ const GNUNET_HashCode *key,
+ uint32_t size,
+ const void *data,
+ unsigned int queue_priority,
+ unsigned int max_queue_size,
+ struct GNUNET_TIME_Relative timeout,
+ GNUNET_DATASTORE_ContinuationWithStatus cont,
+ void *cont_cls);
+
+
/**
* An iterator over a set of items stored in the datastore.
*
* @param iter function to call on each matching value;
* will be called once with a NULL value at the end
* @param iter_cls closure for iter
+ * @return NULL if the entry was not queued, otherwise a handle that can be used to
+ * cancel; note that even if NULL is returned, the callback will be invoked
+ * (or rather, will already have been invoked)
*/
-void
+struct GNUNET_DATASTORE_QueueEntry *
GNUNET_DATASTORE_get (struct GNUNET_DATASTORE_Handle *h,
const GNUNET_HashCode * key,
enum GNUNET_BLOCK_Type type,
* will be called once with a value (if available)
* and always once with a value of NULL.
* @param iter_cls closure for iter
+ * @return NULL if the entry was not queued, otherwise a handle that can be used to
+ * cancel; note that even if NULL is returned, the callback will be invoked
+ * (or rather, will already have been invoked)
*/
-void
+struct GNUNET_DATASTORE_QueueEntry *
GNUNET_DATASTORE_get_random (struct GNUNET_DATASTORE_Handle *h,
unsigned int queue_priority,
unsigned int max_queue_size,
GNUNET_DATASTORE_Iterator iter,
void *iter_cls);
-
/**
- * Explicitly remove some content from the database.
- * The "cont"inuation will be called with status
- * "GNUNET_OK" if content was removed, "GNUNET_NO"
- * if no matching entry was found and "GNUNET_SYSERR"
- * on all other types of errors.
- *
- * @param h handle to the datastore
- * @param key key for the value
- * @param size number of bytes in data
- * @param data content stored
- * @param queue_priority ranking of this request in the priority queue
- * @param max_queue_size at what queue size should this request be dropped
- * (if other requests of higher priority are in the queue)
- * @param timeout how long to wait at most for a response
- * @param cont continuation to call when done
- * @param cont_cls closure for cont
+ * Cancel a datastore operation. The final callback from the
+ * operation must not have been done yet.
+ *
+ * @param qe operation to cancel
*/
void
-GNUNET_DATASTORE_remove (struct GNUNET_DATASTORE_Handle *h,
- const GNUNET_HashCode *key,
- uint32_t size,
- const void *data,
- unsigned int queue_priority,
- unsigned int max_queue_size,
- struct GNUNET_TIME_Relative timeout,
- GNUNET_DATASTORE_ContinuationWithStatus cont,
- void *cont_cls);
+GNUNET_DATASTORE_cancel (struct GNUNET_DATASTORE_QueueEntry *qe);
#if 0 /* keep Emacsens' auto-indent happy */
projects / oweals / gnunet.git / blobdiff