1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
|
#include "mmap.hpp"
#ifdef _WIN32
# include <io.h>
# include <windows.h>
void* mmap( void* addr, size_t length, int prot, int flags, int fd, off_t offset )
{
HANDLE hnd;
void* map = nullptr;
switch( prot )
{
case PROT_READ:
if( hnd = CreateFileMapping( HANDLE( _get_osfhandle( fd ) ), nullptr, PAGE_READONLY, 0, DWORD( length ), nullptr ) )
{
map = MapViewOfFile( hnd, FILE_MAP_READ, 0, 0, length );
CloseHandle( hnd );
}
break;
case PROT_WRITE:
if( hnd = CreateFileMapping( HANDLE( _get_osfhandle( fd ) ), nullptr, PAGE_READWRITE, 0, DWORD( length ), nullptr ) )
{
map = MapViewOfFile( hnd, FILE_MAP_WRITE, 0, 0, length );
CloseHandle( hnd );
}
break;
}
return map ? (char*)map + offset : (void*)-1;
}
int munmap( void* addr, size_t length )
{
return UnmapViewOfFile( addr ) != 0 ? 0 : -1;
}
#endif
|