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Diagnostic.h
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00001 //# Diagnostic.h: debugging diagnostic for dbus clents
00002 //# Copyright (C) 2012
00003 //# Associated Universities, Inc. Washington DC, USA.
00004 //#
00005 //# This library is free software; you can redistribute it and/or modify it
00006 //# under the terms of the GNU Library General Public License as published by
00007 //# the Free Software Foundation; either version 2 of the License, or (at your
00008 //# option) any later version.
00009 //#
00010 //# This library is distributed in the hope that it will be useful, but WITHOUT
00011 //# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
00012 //# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
00013 //# License for more details.
00014 //#
00015 //# You should have received a copy of the GNU Library General Public License
00016 //# along with this library; if not, write to the Free Software Foundation,
00017 //# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA.
00018 //#
00019 //# Correspondence concerning AIPS++ should be addressed as follows:
00020 //#        Internet email: aips2-request@nrao.edu.
00021 //#        Postal address: AIPS++ Project Office
00022 //#                        National Radio Astronomy Observatory
00023 //#                        520 Edgemont Road
00024 //#                        Charlottesville, VA 22903-2475 USA
00025 //#
00026 //# $Id$
00027 
00028 #ifndef CASA_DBUS_DIAGNOSTIC_H_
00029 #define CASA_DBUS_DIAGNOSTIC_H_
00030 #include <string>
00031 #include <stdarg.h>
00032 
00033 namespace casa {
00034         namespace dbus {
00035 
00036                 class Diagnostic {
00037                         public:
00038                                 friend class init_diagnostic_object_t;
00039                                 void argv( int argc_, const char *argv_[] ) {
00040                                         kernel_t &k = lock_kernel( );
00041                                         if ( k.do_log( ) ) k.argv(argc_,argv_);
00042                                         release_kernel( );
00043                                 }
00044                                 void argv( int argc_, char *argv_[] ) {
00045                                         kernel_t &k = lock_kernel( );
00046                                         if ( k.do_log( ) ) k.argv(argc_,argv_);
00047                                         release_kernel( );
00048                                 }
00049                                 Diagnostic( ) { }
00050                                 virtual ~Diagnostic( ) { }
00051 
00052                                 void error(const char *fmt, ...) {
00053                                         kernel_t &k = lock_kernel( );
00054                                         if ( k.do_log( ) ) {
00055                                                 va_list argp;
00056                                                 va_start(argp, fmt);
00057                                                 verror(k, fmt, argp);
00058                                                 va_end(argp);
00059                                         }
00060                                 }
00061 
00062                                 void info(const char *fmt, ...) {
00063                                         kernel_t &k = lock_kernel( );
00064                                         if ( k.do_log( ) ) {
00065                                                 va_list argp;
00066                                                 va_start(argp, fmt);
00067                                                 vinfo(k, fmt, argp);
00068                                                 va_end(argp);
00069                                         }
00070                                 }
00071 
00072                         private:
00073 
00074                                 struct kernel_t {
00075                                         kernel_t( );
00076                                         kernel_t( FILE *f );
00077                                         bool do_log( ) const { return fptr != 0; }
00078                                         ~kernel_t( ) { if ( fptr ) fclose(fptr); }
00079                                         void argv( int argc_, const char *argv_[] );
00080                                         void argv( int argc_, char *argv_[] );
00081                                         FILE *fptr;
00082                                         pid_t pid;
00083                                         std::string name;  /**** any non-argv messages should include 'name' ****/
00084                                 };
00085 
00086                                 /* void verror(Diagnostic::kernel_t &, const char *fmt, va_list argp); */
00087                                 /* void vinfo(Diagnostic::kernel_t &, const char *fmt, va_list argp); */
00088                                 void verror(kernel_t &, const char *fmt, va_list argp);
00089                                 void vinfo(kernel_t &, const char *fmt, va_list argp);
00090 
00091                                 kernel_t &lock_kernel( );
00092                                 void release_kernel( ) { }
00093                                 void output_prologue( );
00094                                 void output_epilogue( );
00095                 };
00096 
00097                 Diagnostic diagnostic;
00098 
00099                 static class init_diagnostic_object_t {
00100                         public:
00101                                 init_diagnostic_object_t( ) { if ( count++ == 0 ) diagnostic.output_prologue( ); }
00102                                 ~init_diagnostic_object_t( ) { if ( --count == 0 ) { diagnostic.output_epilogue( ); } }
00103                         private:
00104                                 static unsigned long count;
00105                 } init_diagnostic_object_;
00106         }
00107 }
00108 
00109 #endif