libfreerdp-core: return proper event handles on Windows

channels/client/channels.c

@@ -1262,13 +1262,13 @@ static void freerdp_channels_process_sync(rdpChannels* channels, freerdp* instan
 BOOL freerdp_channels_get_fds(rdpChannels* channels, freerdp* instance, void** read_fds,
 	int* read_count, void** write_fds, int* write_count)
 {
-	int fd;
+	void* pfd;
 
-	fd = GetEventFileDescriptor(channels->signal);
+	pfd = GetEventWaitObject(channels->signal);
 
-	if (fd != -1)
+	if (pfd)
 	{
-		read_fds[*read_count] = ((void*) (long) fd);
+		read_fds[*read_count] = pfd;
 		(*read_count)++;
 	}
 

channels/server/channels.c

@@ -469,23 +469,23 @@ void WTSDestroyVirtualChannelManager(WTSVirtualChannelManager* vcm)
 void WTSVirtualChannelManagerGetFileDescriptor(WTSVirtualChannelManager* vcm,
 	void** fds, int* fds_count)
 {
-	int fd;
+	void* fd;
 
-	fd = GetEventFileDescriptor(vcm->send_event);
+	fd = GetEventWaitObject(vcm->send_event);
 
-	if (fd != -1)
+	if (fd)
 	{
-		fds[*fds_count] = ((void*) (long) fd);
+		fds[*fds_count] = fd;
 		(*fds_count)++;
 	}
 
 	if (vcm->drdynvc_channel)
 	{
-		fd = GetEventFileDescriptor(vcm->drdynvc_channel->receive_event);
+		fd = GetEventWaitObject(vcm->drdynvc_channel->receive_event);
 
-		if (fd != -1)
+		if (fd)
 		{
-			fds[*fds_count] = ((void*) (long) fd);
+			fds[*fds_count] = fd;
 			(*fds_count)++;
 		}
 	}
@@ -626,7 +626,7 @@ BOOL WTSVirtualChannelQuery(
 	/* __out */ void** ppBuffer,
 	/* __out */ UINT32* pBytesReturned)
 {
-	int fd;
+	void* pfd;
 	BOOL bval;
 	void* fds[10];
 	int fds_count = 0;
@@ -637,11 +637,11 @@ BOOL WTSVirtualChannelQuery(
 	{
 		case WTSVirtualFileHandle:
 
-			fd = GetEventFileDescriptor(channel->receive_event);
+			pfd = GetEventWaitObject(channel->receive_event);
 
-			if (fd != -1)
+			if (pfd)
 			{
-				fds[fds_count] = ((void*) (long) fd);
+				fds[fds_count] = pfd;
 				(fds_count)++;
 			}
 

libfreerdp/core/transport.c

@@ -515,7 +515,7 @@ int transport_write(rdpTransport* transport, STREAM* s)
 
 void transport_get_fds(rdpTransport* transport, void** rfds, int* rcount)
 {
-	int fd;
+	void* pfd;
 
 #ifdef _WIN32
 	rfds[*rcount] = transport->TcpIn->wsa_event;
@@ -537,11 +537,11 @@ void transport_get_fds(rdpTransport* transport, void** rfds, int* rcount)
 	}
 #endif
 
-	fd = GetEventFileDescriptor(transport->recv_event);
+	pfd = GetEventWaitObject(transport->recv_event);
 
-	if (fd != -1)
+	if (pfd)
 	{
-		rfds[*rcount] = ((void*) (long) fd);
+		rfds[*rcount] = pfd;
 		(*rcount)++;
 	}
 }

winpr/include/winpr/synch.h

@@ -259,13 +259,14 @@ WINPR_API HANDLE CreateFileDescriptorEventW(LPSECURITY_ATTRIBUTES lpEventAttribu
 WINPR_API HANDLE CreateFileDescriptorEventA(LPSECURITY_ATTRIBUTES lpEventAttributes,
 		BOOL bManualReset, BOOL bInitialState, int FileDescriptor);
 
-WINPR_API int GetEventFileDescriptor(HANDLE hEvent);
-
 #ifdef UNICODE
 #define CreateFileDescriptorEvent	CreateFileDescriptorEventW
 #else
 #define CreateFileDescriptorEvent	CreateFileDescriptorEventA
 #endif
 
+WINPR_API int GetEventFileDescriptor(HANDLE hEvent);
+WINPR_API void* GetEventWaitObject(HANDLE hEvent);
+
 #endif /* WINPR_SYNCH_H */
 

winpr/libwinpr/synch/event.c

@@ -201,6 +201,11 @@ HANDLE CreateFileDescriptorEventA(LPSECURITY_ATTRIBUTES lpEventAttributes, BOOL
 	return CreateFileDescriptorEventW(lpEventAttributes, bManualReset, bInitialState, FileDescriptor);
 }
 
+/*
+ * Returns inner file descriptor for usage with select()
+ * This file descriptor is not usable on Windows
+ */
+
 int GetEventFileDescriptor(HANDLE hEvent)
 {
 #ifndef _WIN32
@@ -218,3 +223,26 @@ int GetEventFileDescriptor(HANDLE hEvent)
 	return -1;
 #endif
 }
+
+/**
+ * Returns platform-specific wait object as a void pointer
+ *
+ * On Windows, the returned object is the same as the hEvent
+ * argument and is an event HANDLE usable in WaitForMultipleObjects
+ *
+ * On other platforms, the returned object can be cast to an int
+ * to obtain a file descriptor usable in select()
+ */
+
+void* GetEventWaitObject(HANDLE hEvent)
+{
+#ifndef _WIN32
+	int fd;
+
+	fd = GetEventFileDescriptor(hEvent);
+
+	return ((void*) (long) fd);
+#else
+	return hEvent;
+#endif
+}