internal unsafe MemoryMapFile(String fileName, String fileMappingName)
{
//
// Use native API to create the file directly.
//
SafeFileHandle fileHandle = Win32Native.UnsafeCreateFile(fileName, FileStream.GENERIC_READ, FileShare.Read, null, FileMode.Open, 0, IntPtr.Zero);
int lastError = Marshal.GetLastWin32Error();
if (fileHandle.IsInvalid)
{
BCLDebug.Assert(false, "Failed to create file " + fileName + ", GetLastError = " + lastError);
throw new InvalidOperationException(String.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("InvalidOperation_UnexpectedWin32Error"), lastError));
}
int highSize;
int lowSize = Win32Native.GetFileSize(fileHandle, out highSize);
if (lowSize == Win32Native.INVALID_FILE_SIZE)
{
BCLDebug.Assert(false, "Failed to get the file size of " + fileName + ", GetLastError = " + lastError);
throw new InvalidOperationException(String.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("InvalidOperation_UnexpectedWin32Error"), lastError));
}
fileSize = (((long)highSize) << 32) | ((uint)lowSize);
if (fileSize == 0)
{
// we cannot map zero size file. the caller should check for the file size.
fileHandle.Close();
return;
}
SafeFileMappingHandle fileMapHandle = Win32Native.CreateFileMapping(fileHandle, IntPtr.Zero, PAGE_READONLY, 0, 0, fileMappingName);
fileHandle.Close();
lastError = Marshal.GetLastWin32Error();
if (fileMapHandle.IsInvalid)
{
BCLDebug.Assert(false, "Failed to create file mapping for file " + fileName + ", GetLastError = " + lastError);
throw new InvalidOperationException(String.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("InvalidOperation_UnexpectedWin32Error"), lastError));
}
viewOfFileHandle = Win32Native.MapViewOfFile(fileMapHandle, SECTION_MAP_READ, 0, 0, UIntPtr.Zero);
lastError = Marshal.GetLastWin32Error();
if (viewOfFileHandle.IsInvalid)
{
BCLDebug.Assert(false, "Failed to map a view of file " + fileName + ", GetLastError = " + lastError);
throw new InvalidOperationException(String.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("InvalidOperation_UnexpectedWin32Error"), lastError));
}
bytes = (byte *)viewOfFileHandle.DangerousGetHandle();
fileMapHandle.Close();
}
/// <summary>Create a syncronized shared memory file</summary>
/// <param name="name">The suffix of the shared memory file and semaphore.</param>
public ProcessValueCoordinator(string name)
{
if (String.IsNullOrWhiteSpace(name))
{
throw new ArgumentNullException(name);
}
bool created = false;
this.semaphore = new Semaphore(1, 1, SemaphoreName + name, out created);
this.sharedMemoryHandle = Win32Native.CreateFileMapping(new SafeFileHandle(IntPtr.Zero, false), IntPtr.Zero, FileMapProtection.PageReadWrite, 0, BufferSize, SharedMemoryName + name);
this.sharedMemoryMap = Win32Native.MapViewOfFile(this.sharedMemoryHandle, FileMapAccess.FileMapAllAccess, 0, 0, BufferSize);
}
private void Map()
{
if (m_Disposed)
{
// This can happen in the case where an IsolatedStorageFileStream is used after the underlying IsolatedStorageFile object is disposed.
// which we allowed in Silverlight 3. If this is the case, we will rebuild our state.
Init();
m_Disposed = false;
GC.ReRegisterForFinalize(this);
}
if (m_QuotaFileMapping == null || m_QuotaFileMapping.IsInvalid)
{
m_QuotaFileMapping = Win32Native.CreateFileMapping(m_QuotaFileStream.SafeFileHandle, IntPtr.Zero, Win32Native.PAGE_READWRITE, 0, 0, null);
if (m_QuotaFileMapping.IsInvalid)
{
throw Marshal.GetExceptionForHR(Marshal.GetLastWin32Error());
}
}
if (m_UsedSizeFileMapping == null || m_UsedSizeFileMapping.IsInvalid)
{
m_UsedSizeFileMapping = Win32Native.CreateFileMapping(m_UsedSizeFileStream.SafeFileHandle, IntPtr.Zero, Win32Native.PAGE_READWRITE, 0, 0, null);
if (m_UsedSizeFileMapping.IsInvalid)
{
throw Marshal.GetExceptionForHR(Marshal.GetLastWin32Error());
}
}
m_QuotaView = Win32Native.MapViewOfFile(m_QuotaFileMapping, Win32Native.FILE_MAP_WRITE | Win32Native.FILE_MAP_READ, 0, 0, UIntPtr.Zero);
if (m_QuotaView == IntPtr.Zero)
{
throw Marshal.GetExceptionForHR(Marshal.GetLastWin32Error());
}
m_UsedSizeView = Win32Native.MapViewOfFile(m_UsedSizeFileMapping, Win32Native.FILE_MAP_WRITE | Win32Native.FILE_MAP_READ, 0, 0, UIntPtr.Zero);
if (m_UsedSizeView == IntPtr.Zero)
{
throw Marshal.GetExceptionForHR(Marshal.GetLastWin32Error());
}
}
public override void Initialize(DebugStreamContext context)
{
_scope = context.GlobalScope ? @"Global\" : @"Local\";
_logger.Information("Initializing debug listener...");
// Initialize the security descriptor.
_logger.Verbose("Creating new security descriptor...");
var sd = new SecurityDescriptor();
if (!Win32Native.InitializeSecurityDescriptor(ref sd, Win32Native.SECURITY_DESCRIPTOR_REVISION))
{
_logger.Error("Failed to initializes the security descriptor.");
throw new InvalidOperationException("Failed to initializes the security descriptor.");
}
// Set information in a discretionary access control list
_logger.Verbose("Creating new security descriptor dacl...");
if (!Win32Native.SetSecurityDescriptorDacl(ref sd, true, IntPtr.Zero, false))
{
_logger.Error("Failed to initializes the security descriptor.");
throw new InvalidOperationException("Failed to initializes the security descriptor.");
}
_logger.Verbose("Creating security attributes...");
var sa = new SecurityAttributes();
sa.nLength = Marshal.SizeOf(sa);
sa.lpSecurityDescriptor = Marshal.AllocHGlobal(Marshal.SizeOf(sd));
Marshal.StructureToPtr(sd, sa.lpSecurityDescriptor, false);
// Create the event for slot 'DBWIN_BUFFER_READY'
_logger.Verbose("Creating event DBWIN_BUFFER_READY...");
_bufferReadyEvent = Win32Native.CreateEvent(ref sa, false, false, _scope + "DBWIN_BUFFER_READY");
if (_bufferReadyEvent == IntPtr.Zero)
{
_logger.Error("Failed to create event DBWIN_BUFFER_READY.");
throw new InvalidOperationException("Failed to create event 'DBWIN_BUFFER_READY'");
}
// Create the event for slot 'DBWIN_DATA_READY'
_logger.Verbose("Creating event DBWIN_DATA_READY...");
_readyEvent = Win32Native.CreateEvent(ref sa, false, false, _scope + "DBWIN_DATA_READY");
if (_readyEvent == IntPtr.Zero)
{
_logger.Error("Failed to create event DBWIN_DATA_READY.");
throw new InvalidOperationException("Failed to create event 'DBWIN_DATA_READY'");
}
// Get a handle to the readable shared memory at slot 'DBWIN_BUFFER'.
_logger.Verbose("Creating file mapping to slot DBWIN_BUFFER...");
_sharedFile = Win32Native.CreateFileMapping(new IntPtr(-1), ref sa, PageProtection.ReadWrite, 0, 4096, _scope + "DBWIN_BUFFER");
if (_sharedFile == IntPtr.Zero)
{
_logger.Error("Failed to create a file mapping to slot DBWIN_BUFFER.");
throw new InvalidOperationException("Failed to create a file mapping to slot 'DBWIN_BUFFER'");
}
// Create a view for this file mapping so we can access it
_logger.Verbose("Creating mapping view to slot DBWIN_BUFFER...");
_sharedMemory = Win32Native.MapViewOfFile(_sharedFile, Win32Native.SECTION_MAP_READ, 0, 0, 512);
if (_sharedMemory == IntPtr.Zero)
{
_logger.Error("Failed to create a mapping view to slot DBWIN_BUFFER.");
throw new InvalidOperationException("Failed to create a mapping view for slot 'DBWIN_BUFFER'");
}
_logger.Information("Debug listener has been initialized.");
}