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authorJakub Grajciar <jgrajcia@cisco.com>2020-04-02 10:02:17 +0200
committerDamjan Marion <dmarion@me.com>2020-04-28 21:18:37 +0000
commit07363a45fe4a7fe693acf438f0b56f927bdd3fbd (patch)
tree6d53728ac594de1b86e85c7d4ea1d9f8d145a993 /extras/gomemif/memif/memif_unsafe.go
parentc458c493667bde30c22760e3a1839f2cac6e6447 (diff)
gomemif: introduce gomemif
golang native memif driver Type: feature Signed-off-by: Jakub Grajciar <jgrajcia@cisco.com> Change-Id: I693156a44011c80025245d25134f5bf5db6eba82 Signed-off-by: Jakub Grajciar <jgrajcia@cisco.com>
Diffstat (limited to 'extras/gomemif/memif/memif_unsafe.go')
-rw-r--r--extras/gomemif/memif/memif_unsafe.go55
1 files changed, 55 insertions, 0 deletions
diff --git a/extras/gomemif/memif/memif_unsafe.go b/extras/gomemif/memif/memif_unsafe.go
new file mode 100644
index 00000000000..4469d26e982
--- /dev/null
+++ b/extras/gomemif/memif/memif_unsafe.go
@@ -0,0 +1,55 @@
+/*
+ *------------------------------------------------------------------
+ * Copyright (c) 2020 Cisco and/or its affiliates.
+ * 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.
+ *------------------------------------------------------------------
+ */
+
+package memif
+
+import (
+ "unsafe"
+)
+
+// readHead reads ring head directly form the shared memory
+func (q *Queue) readHead() (head int) {
+ return (int)(*(*uint16)(unsafe.Pointer(&q.i.regions[q.ring.region].data[q.ring.offset+ringHeadOffset])))
+ // return atomicload16(&q.i.regions[q.region].data[q.offset + descHeadOffset])
+}
+
+// readTail reads ring tail directly form the shared memory
+func (q *Queue) readTail() (tail int) {
+ return (int)(*(*uint16)(unsafe.Pointer(&q.i.regions[q.ring.region].data[q.ring.offset+ringTailOffset])))
+ // return atomicload16(&q.i.regions[q.region].data[q.offset + descTailOffset])
+}
+
+// writeHead writes ring head directly to the shared memory
+func (q *Queue) writeHead(value int) {
+ *(*uint16)(unsafe.Pointer(&q.i.regions[q.ring.region].data[q.ring.offset+ringHeadOffset])) = *(*uint16)(unsafe.Pointer(&value))
+ //atomicstore16(&q.i.regions[q.region].data[q.offset + descHeadOffset], value)
+}
+
+// writeTail writes ring tail directly to the shared memory
+func (q *Queue) writeTail(value int) {
+ *(*uint16)(unsafe.Pointer(&q.i.regions[q.ring.region].data[q.ring.offset+ringTailOffset])) = *(*uint16)(unsafe.Pointer(&value))
+ //atomicstore16(&q.i.regions[q.region].data[q.offset + descTailOffset], value)
+}
+
+func (q *Queue) setDescLength(slot int, length int) {
+ *(*uint16)(unsafe.Pointer(&q.i.regions[q.ring.region].data[q.ring.offset+ringSize+slot*descSize+descLengthOffset])) = *(*uint16)(unsafe.Pointer(&length))
+}
+
+// getFlags reads ring flags directly from the shared memory
+func (q *Queue) getFlags() int {
+ return (int)(*(*uint16)(unsafe.Pointer(&q.i.regions[q.ring.region].data[q.ring.offset+ringFlagsOffset])))
+}