private void btnStart_Click(object sender, EventArgs e)
{
if (btnStart.Text == "STOP")
{
btnStart.Text = "START";
memoryTimer.Stop();
rbServer.Enabled = true;
rbClient.Enabled = true;
Thread.Sleep(100);
FileMappingNative.UnmapViewOfFile(pBuf);
FileMappingNative.CloseHandle(hMapFile);
}
else
{
btnStart.Text = "STOP";
rbServer.Enabled = false;
rbClient.Enabled = false;
if (workType == 'S')
{
// Create the file mapping object
hMapFile = FileMappingNative.CreateFileMapping(
(IntPtr)FileMappingNative.INVALID_HANDLE_VALUE,
IntPtr.Zero,
// 파일 Mapping 을 쓰기 가능으로 Open
FileProtection.PAGE_READWRITE,
0,
BUFFER_SIZE,
strMapFileName);
if (hMapFile == IntPtr.Zero)
{
Console.WriteLine("Unable to create file mapping object w/err 0x{0:X}",
FileMappingNative.GetLastError());
return;
}
Console.WriteLine("The file mapping object, {0}, is created.",
strMapFileName);
/////////////////////////////////////////////////////////////////////
// Maps the view of the file mapping into the address space of the
// current process.
//
// Create file view from the file mapping object.
// 버퍼에 매핑, 향후 pBuf 를 통하여 메모리에 쓸 수 있음
pBuf = FileMappingNative.MapViewOfFile(
hMapFile,
FileMapAccess.FILE_MAP_ALL_ACCESS,
0,
0,
BUFFER_SIZE);
if (pBuf == IntPtr.Zero)
{
Console.WriteLine("Unable to map view of file w/err 0x{0:X}",
FileMappingNative.GetLastError());
return;
}
Console.WriteLine("The file view is created.");
memoryTimer.Start();
}
else if (workType == 'C')
{
// Open the named file mapping.
hMapFile = FileMappingNative.OpenFileMapping(
FileMapAccess.FILE_MAP_ALL_ACCESS,
false,
strMapFileName);
if (hMapFile == IntPtr.Zero)
{
Console.WriteLine("Unable to open file mapping object w/err 0x{0:X}",
FileMappingNative.GetLastError());
return;
}
Console.WriteLine("The file mapping object, {0}, is opened.",
strMapFileName);
pBuf = FileMappingNative.MapViewOfFile(
hMapFile,
FileMapAccess.FILE_MAP_ALL_ACCESS,
0,
0,
BUFFER_SIZE);
if (pBuf == IntPtr.Zero)
{
Console.WriteLine("Unable to map view of file w/err 0x{0:X}",
FileMappingNative.GetLastError());
FileMappingNative.CloseHandle(hMapFile);
return;
}
Console.WriteLine("The file view is created.");
memoryTimer.Start();
}
}
}
static void Main(string[] args)
{
/////////////////////////////////////////////////////////////////////
// Create a file mapping.
//
string strMapFileName = "Local\\HelloWorld";
// Create the file mapping object
IntPtr hMapFile = FileMappingNative.CreateFileMapping(
(IntPtr)FileMappingNative.INVALID_HANDLE_VALUE,
IntPtr.Zero,
FileProtection.PAGE_READWRITE,
0,
BUFFER_SIZE,
strMapFileName);
if (hMapFile == IntPtr.Zero)
{
Console.WriteLine("Unable to create file mapping object w/err 0x{0:X}",
FileMappingNative.GetLastError());
return;
}
Console.WriteLine("The file mapping object, {0}, is created.",
strMapFileName);
/////////////////////////////////////////////////////////////////////
// Maps the view of the file mapping into the address space of the
// current process.
//
// Create file view from the file mapping object.
IntPtr pBuf = FileMappingNative.MapViewOfFile(
hMapFile,
FileMapAccess.FILE_MAP_ALL_ACCESS,
0,
0,
BUFFER_SIZE);
if (pBuf == IntPtr.Zero)
{
Console.WriteLine("Unable to map view of file w/err 0x{0:X}",
FileMappingNative.GetLastError());
return;
}
Console.WriteLine("The file view is created.");
/////////////////////////////////////////////////////////////////////
// Write message to the file view.
//
// Append '\0' at the end of the message considering the native C++
// FileMapping client (CppFileMappingClient).
string strMessage = "Message from first process.\0";
byte[] bMessage = Encoding.Unicode.GetBytes(strMessage);
// Write message to the file view.
Marshal.Copy(bMessage, 0, pBuf, bMessage.Length);
Console.WriteLine("The following message is written to the shared memory:");
Console.WriteLine("\"{0}\"", strMessage);
// Wait to stop the server.
Console.WriteLine("Press any key to stop the server.");
Console.Read();
/////////////////////////////////////////////////////////////////////
// Unmap the file view and close the file mapping objects.
//
FileMappingNative.UnmapViewOfFile(pBuf);
FileMappingNative.CloseHandle(hMapFile);
}
static void Main(string[] args)
{
/////////////////////////////////////////////////////////////////////
// Try to open a named file mapping.
//
string strMapFileName = "Local\\HelloWorld";
// Open the named file mapping.
IntPtr hMapFile = FileMappingNative.OpenFileMapping(
FileMapAccess.FILE_MAP_ALL_ACCESS,
false,
strMapFileName);
if (hMapFile == IntPtr.Zero)
{
Console.WriteLine("Unable to open file mapping object w/err 0x{0:X}",
FileMappingNative.GetLastError());
return;
}
Console.WriteLine("The file mapping object, {0}, is opened.",
strMapFileName);
/////////////////////////////////////////////////////////////////////
// Maps the view of the file mapping into the address space of the
// current process.
//
// Create file view from the file mapping object.
IntPtr pBuf = FileMappingNative.MapViewOfFile(
hMapFile,
FileMapAccess.FILE_MAP_ALL_ACCESS,
0,
0,
BUFFER_SIZE);
if (pBuf == IntPtr.Zero)
{
Console.WriteLine("Unable to map view of file w/err 0x{0:X}",
FileMappingNative.GetLastError());
FileMappingNative.CloseHandle(hMapFile);
return;
}
Console.WriteLine("The file view is created.");
/////////////////////////////////////////////////////////////////////
// Show the message in shared memory.
//
// Copy all characters up to the first null char to strMessage
string strMessage = Marshal.PtrToStringUni(pBuf);
Console.WriteLine("The following message is read from the shared memory:");
Console.WriteLine("\"{0}\"", strMessage);
/////////////////////////////////////////////////////////////////////
// Unmap the file view and close the file mapping objects.
//
FileMappingNative.UnmapViewOfFile(pBuf);
FileMappingNative.CloseHandle(hMapFile);
}
