The Android Open Source Project | c24a8e6 | 2009-03-03 19:28:42 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2006 The Android Open Source Project |
| 3 | * |
| 4 | * System utilities. |
| 5 | */ |
| 6 | #ifndef _MINZIP_SYSUTIL |
| 7 | #define _MINZIP_SYSUTIL |
| 8 | |
| 9 | #include "inline_magic.h" |
| 10 | |
| 11 | #include <sys/types.h> |
| 12 | |
| 13 | /* |
| 14 | * Use this to keep track of mapped segments. |
| 15 | */ |
| 16 | typedef struct MemMapping { |
| 17 | void* addr; /* start of data */ |
| 18 | size_t length; /* length of data */ |
| 19 | |
| 20 | void* baseAddr; /* page-aligned base address */ |
| 21 | size_t baseLength; /* length of mapping */ |
| 22 | } MemMapping; |
| 23 | |
| 24 | /* copy a map */ |
| 25 | INLINE void sysCopyMap(MemMapping* dst, const MemMapping* src) { |
| 26 | *dst = *src; |
| 27 | } |
| 28 | |
| 29 | /* |
The Android Open Source Project | c24a8e6 | 2009-03-03 19:28:42 -0800 | [diff] [blame] | 30 | * Map a file (from fd's current offset) into a shared, |
| 31 | * read-only memory segment. |
| 32 | * |
| 33 | * On success, "pMap" is filled in, and zero is returned. |
| 34 | */ |
| 35 | int sysMapFileInShmem(int fd, MemMapping* pMap); |
| 36 | |
| 37 | /* |
The Android Open Source Project | c24a8e6 | 2009-03-03 19:28:42 -0800 | [diff] [blame] | 38 | * Release the pages associated with a shared memory segment. |
| 39 | * |
| 40 | * This does not free "pMap"; it just releases the memory. |
| 41 | */ |
| 42 | void sysReleaseShmem(MemMapping* pMap); |
| 43 | |
| 44 | #endif /*_MINZIP_SYSUTIL*/ |