Added implementation of shared memory NDK API
Implemeneted the following APIs:
* int ASharedMemory_create(const char *name, size_t size);
* size_t ASharedMemory_getSize(int fd);
* int ASharedMemory_setProt(int fd, int prot);
Test: cts-tradefed run cts --module CtsSensorTestCases \
--test android.hardware.cts.SensorNativeTest
Bug: 5995644, 30985702
Change-Id: I645b35e67293673efce9bb90f042ec0d3b83aa42
diff --git a/native/android/sharedmem.cpp b/native/android/sharedmem.cpp
new file mode 100644
index 0000000..9d029dfa
--- /dev/null
+++ b/native/android/sharedmem.cpp
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * 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 <android/sharedmem.h>
+#include <cutils/ashmem.h>
+#include <utils/Errors.h>
+
+int ASharedMemory_create(const char *name, size_t size) {
+ if (size == 0) {
+ return android::BAD_VALUE;
+ }
+ return ashmem_create_region(name, size);
+}
+
+size_t ASharedMemory_getSize(int fd) {
+ return ashmem_valid(fd) ? ashmem_get_size_region(fd) : 0;
+}
+
+int ASharedMemory_setProt(int fd, int prot) {
+ return ashmem_set_prot_region(fd, prot);
+}
