C# Signature:
[DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Auto)]
static extern IntPtr OpenFileMapping(
uint dwDesiredAccess,
bool bInheritHandle,
string lpName);
User-Defined Types:
None.
Notes:
None.
Tips & Tricks:
Please add some!
Sample Code:
const UInt32 STANDARD_RIGHTS_REQUIRED = 0x000F0000;
const UInt32 SECTION_QUERY = 0x0001;
const UInt32 SECTION_MAP_WRITE = 0x0002;
const UInt32 SECTION_MAP_READ = 0x0004;
const UInt32 SECTION_MAP_EXECUTE = 0x0008;
const UInt32 SECTION_EXTEND_SIZE = 0x0010;
const UInt32 SECTION_ALL_ACCESS = (STANDARD_RIGHTS_REQUIRED|SECTION_QUERY|
SECTION_MAP_WRITE |
SECTION_MAP_READ |
SECTION_MAP_EXECUTE |
SECTION_EXTEND_SIZE);
const UInt32 FILE_MAP_ALL_ACCESS = SECTION_ALL_ACCESS;
private IntPtr hHandle;
private IntPtr pBuffer;
unsafe public void Attach(string SharedMemoryName, UInt32 NumBytes)
{
if (IntPtr.Zero != hHandle) return;
hHandle = OpenFileMapping(FILE_MAP_ALL_ACCESS, false, SharedMemoryName);
if (IntPtr.Zero == hHandle) return;
pBuffer = MapViewOfFile(hHandle, FILE_MAP_ALL_ACCESS, 0, 0, &NumBytes);
}
public void Detach()
{
if (IntPtr.Zero != hHandle)
{
CloseHandle(hHandle); //fair to leak if can't close
hHandle = IntPtr.Zero;
}
pBuffer = IntPtr.Zero;
lBufferSize = 0;
}
Alternative Managed API:
Do you know one? Please contribute it!
