Split SystemException to handle Windows

Windows has (at least) two error namespaces, both errno and
GetLastResult(). These overlap, so it is important we keep track of
which one we are dealing with.

To make things extra problematic, the BSD socket API normally uses
errno, but on Windows it has been mapped in to the GetLastResult()
namespace.

Try to keep better control of this by using separate classes for the
namespaces.

1 files changed, 2 insertions, 2 deletions

diff --git a/win/rfb_win32/DIBSectionBuffer.cxx b/win/rfb_win32/DIBSectionBuffer.cxx
index aa03315c..ca6f3c9a 100644
--- a/win/rfb_win32/DIBSectionBuffer.cxx
+++ b/win/rfb_win32/DIBSectionBuffer.cxx
@@ -85,7 +85,7 @@ void DIBSectionBuffer::initBuffer(const PixelFormat& pf, int w, int h) {
 
     if (!new_bitmap) {
       int err = GetLastError();
-      throw rdr::SystemException("unable to create DIB section", err);
+      throw rdr::Win32Exception("unable to create DIB section", err);
     }
 
     vlog.debug("recreateBuffer()");
@@ -128,7 +128,7 @@ void DIBSectionBuffer::initBuffer(const PixelFormat& pf, int w, int h) {
     // Determine the *actual* DIBSection format
     DIBSECTION ds;
     if (!GetObject(bitmap, sizeof(ds), &ds))
-      throw rdr::SystemException("GetObject", GetLastError());
+      throw rdr::Win32Exception("GetObject", GetLastError());
 
     // Correct the "stride" of the DIB
     // *** This code DWORD aligns each row - is that right???