private SafeViewOfFileHandle GetView(bool writable)
{
SafeViewOfFileHandle handle = UnsafeNativeMethods.MapViewOfFile(this.fileMapping, writable ? 2 : 4, 0, 0, (IntPtr)sizeof(SharedMemoryContents));
if (handle.IsInvalid)
{
int error = Marshal.GetLastWin32Error();
handle.SetHandleAsInvalid();
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(CreatePipeNameCannotBeAccessedException(error, this.pipeUri));
}
return(handle);
}
private static bool GetView(SafeFileMappingHandle fileMapping, bool writable, out SafeViewOfFileHandle handle)
{
handle = UnsafeNativeMethods.MapViewOfFile(fileMapping, writable ? 2 : 4, 0, 0, (IntPtr) sizeof(SharedMemoryContents));
int error = Marshal.GetLastWin32Error();
if (!handle.IsInvalid)
{
return true;
}
handle.SetHandleAsInvalid();
fileMapping.Close();
if (writable || (error != 2))
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new Win32Exception(error));
}
return false;
}
private unsafe void InitializeContents(Guid pipeGuid)
{
SafeViewOfFileHandle view = this.GetView(true);
try
{
SharedMemoryContents *handle = (SharedMemoryContents *)view.DangerousGetHandle();
handle->pipeGuid = pipeGuid;
Thread.MemoryBarrier();
handle->isInitialized = true;
}
finally
{
view.Close();
}
}
static bool GetView(SafeFileMappingHandle fileMapping, bool writable, out SafeViewOfFileHandle handle)
{
handle = UnsafeNativeMethods.MapViewOfFile(fileMapping, writable ? UnsafeNativeMethods.FILE_MAP_WRITE : UnsafeNativeMethods.FILE_MAP_READ, 0, 0, (IntPtr)sizeof(SharedMemoryContents));
int errorCode = Marshal.GetLastWin32Error();
if (!handle.IsInvalid)
{
return true;
}
else
{
handle.SetHandleAsInvalid();
fileMapping.Close();
// Only return false when it's reading time.
if (!writable && errorCode == UnsafeNativeMethods.ERROR_FILE_NOT_FOUND)
{
return false;
}
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new Win32Exception(errorCode));
}
}
