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omrshmem.h
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omrshmem.h
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/*******************************************************************************
* Copyright (c) 2020, 2020 IBM Corp. and others
*
* This program and the accompanying materials are made available under
* the terms of the Eclipse Public License 2.0 which accompanies this
* distribution and is available at https://www.eclipse.org/legal/epl-2.0/
* or the Apache License, Version 2.0 which accompanies this distribution and
* is available at https://www.apache.org/licenses/LICENSE-2.0.
*
* This Source Code may also be made available under the following
* Secondary Licenses when the conditions for such availability set
* forth in the Eclipse Public License, v. 2.0 are satisfied: GNU
* General Public License, version 2 with the GNU Classpath
* Exception [1] and GNU General Public License, version 2 with the
* OpenJDK Assembly Exception [2].
*
* [1] https://www.gnu.org/software/classpath/license.html
* [2] http://openjdk.java.net/legal/assembly-exception.html
*
* SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 OR GPL-2.0 WITH Classpath-exception-2.0 OR LicenseRef-GPL-2.0 WITH Assembly-exception
*******************************************************************************/
#ifndef omrshmem_h
#define omrshmem_h
/* @ddr_namespace: default */
#include <sys/types.h>
#include "omrport.h"
typedef struct omrshmem_handle {
int32_t shmid;
char* baseFileName;
void* regionStart;
int64_t timestamp;
int32_t perm;
uintptr_t size;
uintptr_t currentStorageProtectKey;
uintptr_t controlStorageProtectKey;
uintptr_t flags;
OMRMemCategory * category;
} omrshmem_handle;
/*
* The control file format is definied in the below two structures.
* 'omrshmem_controlBaseFileFormat' is readable from all non zero byte
* control files generated by java 5,6, and 7.
*
* Note: There are two structures because of CMVC 163844. The fields beyond,
* and including, 'int64_t size'can't be read from deprecated/older control files
* b/c a padding byte is inserted by newer (not older) compilers before the int64_t
* (to ensure it is 8 byte aligned). Specifically this is a problem when
* working with caches from 32 bit java5 on linux.
*/
typedef struct omrshmem_controlBaseFileFormat {
int32_t version;
int32_t modlevel;
key_t ftok_key;
int32_t proj_id;
int32_t shmid;
} omrshmem_controlBaseFileFormat;
typedef struct omrshmem_controlFileFormat {
omrshmem_controlBaseFileFormat common;
int64_t size;
int32_t uid;
int32_t gid;
} omrshmem_controlFileFormat;
#endif /* omrshmem_h */