sustaining_gazes/lib/local/CamCom/comet/util.h

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2016-05-20 22:48:43 +02:00
/** \file
* Various utilities.
*/
/*
* Copyright <EFBFBD> 2000, 2001 Sofus Mortensen
*
* This material is provided "as is", with absolutely no warranty
* expressed or implied. Any use is at your own risk. Permission to
* use or copy this software for any purpose is hereby granted without
* fee, provided the above notices are retained on all copies.
* Permission to modify the code and to distribute modified code is
* granted, provided the above notices are retained, and a notice that
* the code was modified is included with the above copyright notice.
*
* This header is part of Comet version 2.
* https://github.com/alamaison/comet
*/
#ifndef COMET_UTIL_H
#define COMET_UTIL_H
#include <comet/config.h>
#include <stdexcept>
#include <comet/error.h>
#include <comet/server.h>
namespace comet {
/*! \addtogroup WinUtil
*/
//@{
//! Automatic handling of CoInitialize / CoUninitialize.
class auto_coinit {
public:
#if (_WIN32_WINNT >= 0x0400 ) || defined(_WIN32_DCOM) // DCOM
explicit auto_coinit(COINIT ci) {
::CoInitializeEx(0, ci) | raise_exception;
}
#endif
auto_coinit() { ::CoInitialize(0) | raise_exception; }
~auto_coinit() { ::CoUninitialize(); }
private:
auto_coinit& operator=(const auto_coinit&);
auto_coinit(const auto_coinit&);
};
// For backward compatibility.
typedef auto_coinit auto_CoInitialize;
/// Returns the class id of the free threaded marshaler
inline CLSID get_clsid_of_ftm()
{
CLSID rv;
class Dummy : public static_object<> {} dummy;
IUnknown* pUnk = 0;
::CoCreateFreeThreadedMarshaler(&dummy, &pUnk) | raise_exception;
com_ptr<IMarshal> marshal = try_cast(pUnk);
marshal.raw()->GetUnmarshalClass(IID_IUnknown, &dummy, MSHCTX_INPROC,0,MSHLFLAGS_NORMAL, &rv) | raise_exception;
return rv;
}
/**
* Returns true if and only if object is aggregating the free threaded marshaler.
*/
inline bool is_object_aggregating_ftm(const com_ptr<IUnknown>& p)
{
com_ptr<IMarshal> marshal = com_cast(p);
if (marshal == 0) return false;
class Dummy : public static_object<> {} dummy;
CLSID clsid = CLSID_NULL;
marshal.raw()->GetUnmarshalClass(IID_IUnknown, &dummy, MSHCTX_INPROC,0,MSHLFLAGS_NORMAL, &clsid);
CLSID ftm_clsid = get_clsid_of_ftm();
return clsid == ftm_clsid ? true : false;
}
#if (_WIN32_WINNT >= 0x0400 ) || defined(_WIN32_DCOM) // DCOM
/**
* Returns true if and only if current apartment is the MTA.
*/
inline bool is_mta()
{
if (SUCCEEDED(::CoInitializeEx(0, COINIT_MULTITHREADED)))
{
::CoUninitialize();
return true;
}
return false;
}
#endif
/**
* Returns true if and only if current apartment is an STA.
*/
inline bool is_sta()
{
if (SUCCEEDED(::CoInitialize(0)))
{
::CoUninitialize();
return true;
}
return false;
}
/**
* Returns true if and only if specified ptr is a standard proxy.
*/
inline bool is_std_proxy(const com_ptr<IUnknown>& unk)
{
com_ptr<IUnknown> pm;
return SUCCEEDED(unk.raw()->QueryInterface(IID_IProxyManager, reinterpret_cast<void**>(pm.out())));
}
} // namespace
#endif