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Diffstat (limited to 'extras/dispatch/src/work_queue.c')
-rw-r--r-- | extras/dispatch/src/work_queue.c | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/extras/dispatch/src/work_queue.c b/extras/dispatch/src/work_queue.c new file mode 100644 index 0000000000..4b3c5d7fa5 --- /dev/null +++ b/extras/dispatch/src/work_queue.c @@ -0,0 +1,132 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ + +#include <qpid/dispatch/ctools.h> +#include "work_queue.h" +#include <string.h> +#include <stdio.h> + +#define BATCH_SIZE 100 +typedef struct work_item_t work_item_t; + +struct work_item_t { + DEQ_LINKS(work_item_t); + pn_connector_t *conn; +}; + +DEQ_DECLARE(work_item_t, work_list_t); + +struct work_queue_t { + work_list_t items; + work_list_t free_list; +}; + +static void allocate_batch(work_queue_t *w) +{ + int i; + work_item_t *batch = NEW_ARRAY(work_item_t, BATCH_SIZE); + if (!batch) + return; + + memset(batch, 0, sizeof(work_item_t) * BATCH_SIZE); + + for (i = 0; i < BATCH_SIZE; i++) + DEQ_INSERT_TAIL(w->free_list, &batch[i]); +} + + +work_queue_t *work_queue(void) +{ + work_queue_t *w = NEW(work_queue_t); + if (!w) + return 0; + + DEQ_INIT(w->items); + DEQ_INIT(w->free_list); + + allocate_batch(w); + + return w; +} + + +void work_queue_free(work_queue_t *w) +{ + if (!w) + return; + + // KEEP TRACK OF BATCHES AND FREE + free(w); +} + + +void work_queue_put(work_queue_t *w, pn_connector_t *conn) +{ + work_item_t *item; + + if (!w) + return; + if (DEQ_SIZE(w->free_list) == 0) + allocate_batch(w); + if (DEQ_SIZE(w->free_list) == 0) + return; + + item = DEQ_HEAD(w->free_list); + DEQ_REMOVE_HEAD(w->free_list); + + item->conn = conn; + + DEQ_INSERT_TAIL(w->items, item); +} + + +pn_connector_t *work_queue_get(work_queue_t *w) +{ + work_item_t *item; + pn_connector_t *conn; + + if (!w) + return 0; + item = DEQ_HEAD(w->items); + if (!item) + return 0; + + DEQ_REMOVE_HEAD(w->items); + conn = item->conn; + item->conn = 0; + + DEQ_INSERT_TAIL(w->free_list, item); + + return conn; +} + + +int work_queue_empty(work_queue_t *w) +{ + return !w || DEQ_SIZE(w->items) == 0; +} + + +int work_queue_depth(work_queue_t *w) +{ + if (!w) + return 0; + return DEQ_SIZE(w->items); +} + |