public static unsafe bool Read(string name, out string content)
{
bool flag;
content = null;
SafeFileMappingHandle fileMapping = UnsafeNativeMethods.OpenFileMapping(4, false, @"Global\" + name);
int error = Marshal.GetLastWin32Error();
if (fileMapping.IsInvalid)
{
fileMapping.SetHandleAsInvalid();
fileMapping.Close();
if (error != 2)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new Win32Exception(error));
}
return(false);
}
try
{
SafeViewOfFileHandle handle2;
if (!GetView(fileMapping, false, out handle2))
{
flag = false;
}
else
{
try
{
SharedMemoryContents *handle = (SharedMemoryContents *)handle2.DangerousGetHandle();
content = handle->isInitialized ? handle->pipeGuid.ToString() : null;
flag = true;
}
finally
{
handle2.Close();
}
}
}
finally
{
fileMapping.Close();
}
return(flag);
}
public static bool Read(string name, out string content)
{
content = null;
SafeFileMappingHandle fileMapping = UnsafeNativeMethods.OpenFileMapping(UnsafeNativeMethods.FILE_MAP_READ, false, ListenerConstants.GlobalPrefix + name);
int errorCode = Marshal.GetLastWin32Error();
if (fileMapping.IsInvalid)
{
fileMapping.SetHandleAsInvalid();
fileMapping.Close();
if (errorCode == UnsafeNativeMethods.ERROR_FILE_NOT_FOUND)
{
return(false);
}
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new Win32Exception(errorCode));
}
try
{
SafeViewOfFileHandle view;
if (!GetView(fileMapping, false, out view))
{
return(false);
}
try
{
SharedMemoryContents *contents = (SharedMemoryContents *)view.DangerousGetHandle();
content = contents->isInitialized ? contents->pipeGuid.ToString() : null;
return(true);
}
finally
{
view.Close();
}
}
finally
{
fileMapping.Close();
}
}
public static unsafe SharedMemory Create(string name, Guid content, List <SecurityIdentifier> allowedSids)
{
int errorCode = UnsafeNativeMethods.ERROR_SUCCESS;
byte[] binarySecurityDescriptor = SecurityDescriptorHelper.FromSecurityIdentifiers(allowedSids, UnsafeNativeMethods.GENERIC_READ);
SafeFileMappingHandle fileMapping;
UnsafeNativeMethods.SECURITY_ATTRIBUTES securityAttributes = new UnsafeNativeMethods.SECURITY_ATTRIBUTES();
fixed(byte *pinnedSecurityDescriptor = binarySecurityDescriptor)
{
securityAttributes.lpSecurityDescriptor = (IntPtr)pinnedSecurityDescriptor;
fileMapping = UnsafeNativeMethods.CreateFileMapping((IntPtr)(-1), securityAttributes, UnsafeNativeMethods.PAGE_READWRITE, 0, sizeof(SharedMemoryContents), name);
errorCode = Marshal.GetLastWin32Error();
}
if (fileMapping.IsInvalid)
{
fileMapping.SetHandleAsInvalid();
fileMapping.Close();
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new Win32Exception(errorCode));
}
SharedMemory sharedMemory = new SharedMemory(fileMapping);
SafeViewOfFileHandle view;
// Ignore return value.
GetView(fileMapping, true, out view);
try
{
SharedMemoryContents *contents = (SharedMemoryContents *)view.DangerousGetHandle();
contents->pipeGuid = content;
Thread.MemoryBarrier();
contents->isInitialized = true;
return(sharedMemory);
}
finally
{
view.Close();
}
}