Add ASharedMemory_dupFromJava NDK API
Bug: 64394076
Test: SharedMemory CTS tests
Change-Id: I0ee5badff48ce72c8a664180beacfcf89112f6bf
diff --git a/include/android/sharedmem_jni.h b/include/android/sharedmem_jni.h
new file mode 100644
index 0000000..38980f3
--- /dev/null
+++ b/include/android/sharedmem_jni.h
@@ -0,0 +1,82 @@
+/*
+ * 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.
+ */
+
+/**
+ * @addtogroup Memory
+ * @{
+ */
+
+/**
+ * @file sharedmem_jni.h
+ */
+
+#ifndef ANDROID_SHARED_MEMORY_JNI_H
+#define ANDROID_SHARED_MEMORY_JNI_H
+
+#include <jni.h>
+#include <android/sharedmem.h>
+#include <stddef.h>
+
+/******************************************************************
+ *
+ * IMPORTANT NOTICE:
+ *
+ * This file is part of Android's set of stable system headers
+ * exposed by the Android NDK (Native Development Kit).
+ *
+ * Third-party source AND binary code relies on the definitions
+ * here to be FROZEN ON ALL UPCOMING PLATFORM RELEASES.
+ *
+ * - DO NOT MODIFY ENUMS (EXCEPT IF YOU ADD NEW 32-BIT VALUES)
+ * - DO NOT MODIFY CONSTANTS OR FUNCTIONAL MACROS
+ * - DO NOT CHANGE THE SIGNATURE OF FUNCTIONS IN ANY WAY
+ * - DO NOT CHANGE THE LAYOUT OR SIZE OF STRUCTURES
+ */
+
+/**
+ * Structures and functions for a shared memory buffer that can be shared across process.
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if __ANDROID_API__ >= __ANDROID_API_O_MR1__
+
+/**
+ * Returns a dup'd FD from the given Java android.os.SharedMemory object. The returned file
+ * descriptor has all the same properties & capabilities as the FD returned from
+ * ASharedMemory_create(), however the protection flags will be the same as those of the
+ * android.os.SharedMemory object.
+ *
+ * Use close() to release the shared memory region.
+ *
+ * \param env The JNIEnv* pointer
+ * \param sharedMemory The Java android.os.SharedMemory object
+ * \return file descriptor that denotes the shared memory; -1 if the shared memory object is
+ * already closed or if the JNIEnv or jobject is NULL.
+ */
+int ASharedMemory_dupFromJava(JNIEnv* env, jobject sharedMemory);
+
+#endif
+
+#ifdef __cplusplus
+};
+#endif
+
+#endif // ANDROID_SHARED_MEMORY_JNI_H
+
+/** @} */