Add ASharedMemory_dupFromJava NDK API (dc7efea6) · Commits · e / os / platform_frameworks_native

include/android/sharedmem_jni.h

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		/*
		* 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

		/** @} */