Cleaned up CA exceptions. Integrated free-standing handle class.

installer/src/installer-lib/session.cpp

 /**
  * \file session.cpp Implementation of Session class.
  */
 
+#include "installer-lib.h"
 #include "session.h"
 #include "property.h"
 #include "msiquery.h"
 
-// Temporary for debugging
-#include <sstream>
-
-
 //-----------------------------------------------------------------------------------------
 // Message
 //-----------------------------------------------------------------------------------------
 Message::Message( std::string message, INSTALLMESSAGE message_type )
   : r( 1 ), message_type( message_type )
 {
   r.assign_string( 0, message ) ;
 }
 
 Message::Message( std::wstring message, INSTALLMESSAGE message_type )
@@ skipping 51 matching lines @@
 void Session::log_noexcept( std::string message )
 {
   write_message_noexcept( Log_Message( log_prefix + message ) ) ;
 }
 
 int Session::write_message( Message & m )
 {
   int x = write_message_noexcept( m ) ;
   if ( x == -1 )
   {
-    DWORD z = ::GetLastError();
-    std::ostringstream s ;
-    s << "Error writing message. err = 0x" << std::hex << z ;
-    throw std::runtime_error( s.str() ) ;
+    throw windows_api_error( "MsiProcessMessage", x, "attempt to write to log file" ) ;
   }
   return x ;
 }
 
 int Session::write_message_noexcept( Message & m )
 {
   return MsiProcessMessage( handle, m.message_type, m.r.handle() ) ;
 }
 
 //-----------------------------------------------------------------------------------------
 // Immediate_Session
 //-----------------------------------------------------------------------------------------
 Immediate_Session::Immediate_Session( MSIHANDLE handle, std::string name )
   : Session( handle, name )
 {}