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1 files changed, 64 insertions, 0 deletions

diff --git a/gcsdk/steamextra/steam/isteamgamecoordinator.h b/gcsdk/steamextra/steam/isteamgamecoordinator.h
new file mode 100644
index 0000000..63f3c1b
--- /dev/null
+++ b/gcsdk/steamextra/steam/isteamgamecoordinator.h
@@ -0,0 +1,64 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: interface to the game coordinator for this application
+//
+//=============================================================================
+
+#ifndef ISTEAMGAMECOORDINATOR
+#define ISTEAMGAMECOORDINATOR
+#ifdef _WIN32
+#pragma once
+#endif
+
+#include "steam/steamtypes.h"
+#include "steam/steamclientpublic.h"
+#include "steam/isteamclient.h"
+
+// list of possible return values from the ISteamGameCoordinator API
+enum EGCResults
+{
+	k_EGCResultOK = 0,
+	k_EGCResultNoMessage = 1,			// There is no message in the queue
+	k_EGCResultBufferTooSmall = 2,		// The buffer is too small for the requested message
+	k_EGCResultNotLoggedOn = 3,			// The client is not logged onto Steam
+	k_EGCResultInvalidMessage = 4,		// Something was wrong with the message being sent with SendMessage
+};
+
+
+//-----------------------------------------------------------------------------
+// Purpose: Functions for sending and receiving messages from the Game Coordinator
+//			for this application
+//-----------------------------------------------------------------------------
+class ISteamGameCoordinator
+{
+public:
+
+	// sends a message to the Game Coordinator
+	virtual EGCResults SendMessage( uint32 unMsgType, const void *pubData, uint32 cubData ) = 0;
+
+	// returns true if there is a message waiting from the game coordinator
+	virtual bool IsMessageAvailable( uint32 *pcubMsgSize ) = 0; 
+
+	// fills the provided buffer with the first message in the queue and returns k_EGCResultOK or 
+	// returns k_EGCResultNoMessage if there is no message waiting. pcubMsgSize is filled with the message size.
+	// If the provided buffer is not large enough to fit the entire message, k_EGCResultBufferTooSmall is returned
+	// and the message remains at the head of the queue.
+	virtual EGCResults RetrieveMessage( uint32 *punMsgType, void *pubDest, uint32 cubDest, uint32 *pcubMsgSize ) = 0; 
+
+};
+#define STEAMGAMECOORDINATOR_INTERFACE_VERSION "SteamGameCoordinator001"
+
+// callback notification - A new message is available for reading from the message queue
+struct GCMessageAvailable_t
+{
+	enum { k_iCallback = k_iSteamGameCoordinatorCallbacks + 1 };
+	uint32 m_nMessageSize;
+};
+
+// callback notification - A message failed to make it to the GC. It may be down temporarily
+struct GCMessageFailed_t
+{
+	enum { k_iCallback = k_iSteamGameCoordinatorCallbacks + 2 };
+};
+
+#endif // ISTEAMGAMECOORDINATOR