Initial commit of tldk code.

[tldk.git] / lib / libtle_udp / event.c

diff --git a/lib/libtle_udp/event.c b/lib/libtle_udp/event.c
new file mode 100644 (file)
index 0000000..7e340e8
--- /dev/null
+++ b/lib/libtle_udp/event.c
@@ -0,0 +1,104 @@
+/*
+ * Copyright (c) 2016  Intel Corporation.
+ * Licensed 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 <rte_errno.h>
+#include <rte_malloc.h>
+#include <rte_log.h>
+#include <tle_event.h>
+
+#include "osdep.h"
+
+struct tle_evq *
+tle_evq_create(const struct tle_evq_param *prm)
+{
+       struct tle_evq *evq;
+       size_t sz;
+       uint32_t i;
+
+       if (prm == NULL) {
+               rte_errno = EINVAL;
+               return NULL;
+       }
+
+       sz = sizeof(*evq) + sizeof(evq->events[0]) * prm->max_events;
+       evq =  rte_zmalloc_socket(NULL, sz, RTE_CACHE_LINE_SIZE,
+               prm->socket_id);
+       if (evq == NULL) {
+               UDP_LOG(ERR, "allocation of %zu bytes for "
+                       "new tle_evq(%u) on socket %d failed\n",
+                       sz, prm->max_events, prm->socket_id);
+               return NULL;
+       }
+
+       TAILQ_INIT(&evq->armed);
+       TAILQ_INIT(&evq->free);
+
+       for (i = 0; i != prm->max_events; i++) {
+               evq->events[i].head = evq;
+               TAILQ_INSERT_TAIL(&evq->free, evq->events + i, ql);
+       }
+
+       evq->nb_events = i;
+       evq->nb_free = i;
+
+       return evq;
+}
+
+void
+tle_evq_destroy(struct tle_evq *evq)
+{
+       rte_free(evq);
+}
+
+struct tle_event *
+tle_event_alloc(struct tle_evq *evq, const void *data)
+{
+       struct tle_event *h;
+
+       if (evq == NULL) {
+               rte_errno = EINVAL;
+               return NULL;
+       }
+
+       rte_spinlock_lock(&evq->lock);
+       h = TAILQ_FIRST(&evq->free);
+       if (h != NULL) {
+               TAILQ_REMOVE(&evq->free, h, ql);
+               evq->nb_free--;
+               h->data = data;
+       } else
+               rte_errno = -ENOMEM;
+       rte_spinlock_unlock(&evq->lock);
+       return h;
+}
+
+void
+tle_event_free(struct tle_event *ev)
+{
+       struct tle_evq *q;
+
+       if (ev == NULL) {
+               rte_errno = EINVAL;
+               return;
+       }
+
+       q = ev->head;
+       rte_spinlock_lock(&q->lock);
+       ev->data = NULL;
+       ev->state = TLE_SEV_IDLE;
+       TAILQ_INSERT_HEAD(&q->free, ev, ql);
+       q->nb_free++;
+       rte_spinlock_unlock(&q->lock);
+}