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