weex_core/Source/IPC/ashmem.h

/*
 * Copyright (C) 2008 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.
 */

/*
 * Implementation of the user-space ashmem API for devices, which have our
 * ashmem-enabled kernel. See ashmem-sim.c for the "fake" tmp-based version,
 * used by the simulator.
 */

#ifndef _THIRD_PARTY_ASHMEM_H
#define _THIRD_PARTY_ASHMEM_H

#include <stddef.h>

#ifdef __cplusplus
extern "C" {
#endif

int ashmem_create_region(const char* name, size_t size);
int ashmem_set_prot_region(int fd, int prot);
int ashmem_pin_region(int fd, size_t offset, size_t len);
int ashmem_unpin_region(int fd, size_t offset, size_t len);
int ashmem_get_size_region(int fd);
int ashmem_purge_all(void);

#ifdef __cplusplus
}
#endif

#ifndef __ASHMEMIOC /* in case someone included <linux/ashmem.h> too */

#define ASHMEM_NAME_LEN 256

#define ASHMEM_NAME_DEF "dev/ashmem"

/* Return values from ASHMEM_PIN: Was the mapping purged while unpinned? */
#define ASHMEM_NOT_PURGED 0
#define ASHMEM_WAS_PURGED 1

/* Return values from ASHMEM_UNPIN: Is the mapping now pinned or unpinned? */
#define ASHMEM_IS_UNPINNED 0
#define ASHMEM_IS_PINNED 1

#endif /* ! __ASHMEMIOC */

#endif /* _THIRD_PARTY_ASHMEM_H */