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/*
* Copyright 2006 The Android Open Source Project
*
* System utilities.
*/
#ifndef _MINZIP_SYSUTIL
#define _MINZIP_SYSUTIL
#include "inline_magic.h"
#include <sys/types.h>
/*
* Use this to keep track of mapped segments.
*/
typedef struct MemMapping {
void* addr; /* start of data */
size_t length; /* length of data */
void* baseAddr; /* page-aligned base address */
size_t baseLength; /* length of mapping */
} MemMapping;
/* copy a map */
INLINE void sysCopyMap(MemMapping* dst, const MemMapping* src) {
*dst = *src;
}
/*
* Load a file into a new shared memory segment. All data from the current
* offset to the end of the file is pulled in.
*
* The segment is read-write, allowing VM fixups. (It should be modified
* to support .gz/.zip compressed data.)
*
* On success, "pMap" is filled in, and zero is returned.
*/
int sysLoadFileInShmem(int fd, MemMapping* pMap);
/*
* Map a file (from fd's current offset) into a shared,
* read-only memory segment.
*
* On success, "pMap" is filled in, and zero is returned.
*/
int sysMapFileInShmem(int fd, MemMapping* pMap);
/*
* Like sysMapFileInShmem, but on only part of a file.
*/
int sysMapFileSegmentInShmem(int fd, off_t start, long length,
MemMapping* pMap);
/*
* Release the pages associated with a shared memory segment.
*
* This does not free "pMap"; it just releases the memory.
*/
void sysReleaseShmem(MemMapping* pMap);
#endif /*_MINZIP_SYSUTIL*/
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