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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
* @brief Shared memory buffers that can be shared across process.
*/
#ifndef ANDROID_SHARED_MEMORY_JNI_H
#define ANDROID_SHARED_MEMORY_JNI_H
#include <jni.h>
#include <android/sharedmem.h>
#include <stddef.h>
#include <sys/cdefs.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
*/
#ifdef __cplusplus
extern "C" {
#endif
/**
* 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.
*
* Available since API level 27.
*
* \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, if the JNIEnv or jobject is NULL, or if there are too many open file
* descriptors (errno=EMFILE)
*/
int ASharedMemory_dupFromJava(JNIEnv* env, jobject sharedMemory) __INTRODUCED_IN(27);
#ifdef __cplusplus
};
#endif
#endif // ANDROID_SHARED_MEMORY_JNI_H
/** @} */
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