ChangeLogTag:Wed Feb 7 21:01:39 UTC 2007 Steve Huston <shuston@riverace.com>

1 files changed, 17 insertions, 2 deletions

diff --git a/ACE/ace/OS_NS_unistd.cpp b/ACE/ace/OS_NS_unistd.cpp
index 81b2c9e3aa9..26008066a76 100644
--- a/ACE/ace/OS_NS_unistd.cpp
+++ b/ACE/ace/OS_NS_unistd.cpp
@@ -594,8 +594,23 @@ ACE_OS::pwrite (ACE_HANDLE handle,
 
 #     else /* ACE_HAS_WIN32_OVERLAPPED_IO */
 
-  // Go to the correct position
-  if (! ::SetFilePointerEx (handle, loffset, 0, FILE_BEGIN))
+  // Go to the correct position; if this is a Windows variant without
+  // overlapped I/O, it probably doesn't have SetFilePointerEx either,
+  // so manage this with SetFilePointer, changing calls based on the use
+  // of 64 bit offsets.
+  DWORD newpos;
+#       if defined (_FILE_OFFSET_BITS) && _FILE_OFFSET_BITS == 64
+  newpos = ::SetFilePointer (handle,
+                             loffset.LowPart,
+                             &loffset.HighPart,
+                             FILE_BEGIN);
+#       else
+  newpos = ::SetFilePointer (handle,
+                             loffset.LowPart,
+                             0,
+                             FILE_BEGIN);
+#       endif /* 64-bit file offsets */
+  if (newpos == 0xFFFFFFFF && ::GetLastError () != NO_ERROR)
     {
       ACE_OS::set_errno_to_last_error ();
       return -1;