source: tags/ms_r17q1/TEMPLATES/SuppressOutput.h

Last change on this file was 7623, checked in by westram, 15 years ago
  • merge from dev [7450] [7452] [7456] [7457] [7458] [7459] [7460] [7461] [7464] [7465] [7466] [7467] [7468] [7469] [7482]
    • tweaked compiler options
      • activated -Weffc++
        • postfilter warnings where Scott Meyers' advices are too general.
          • base classes should not always have virtual destructors, since that renders tiny classes useless and
          • members should not always be initialized via initialization list, since that often violates the DRY principle
        • fix gcc's inability to detect that Noncopyable implements a private copy-ctor and op=
        • this slows down complete ARB recompilation by ~5%
    • added -Wold-style-cast (inactive)
    • removed -Wno-non-template-friend added in [7447]
  • postcompile.pl
    • added option —original to show unmodified compiler output
  • declared op= for classes which had a copy-ctor
  • moved op= macros to arbtools.h
  • derived classes containing pointers from Noncopyable (use Noncopyable virtually) or
  • made them copyable if needed (awt_mask_item, KnownDB, Code, AWT_registered_itemtype, GEN_gene, PosGene, PartialSequence, PlugIn, Range, Convaln_exception)
  • other related changes
    • user mask destruction working now
File size: 1.7 KB
Line 
1// ================================================================ //
2//                                                                  //
3//   File      : SuppressOutput.h                                   //
4//   Purpose   :                                                    //
5//                                                                  //
6//   Coded by Ralf Westram (coder@reallysoft.de) in November 2010   //
7//   Institute of Microbiology (Technical University Munich)        //
8//   http://www.arb-home.de/                                        //
9//                                                                  //
10// ================================================================ //
11
12#ifndef SUPPRESSOUTPUT_H
13#define SUPPRESSOUTPUT_H
14
15#ifndef _GLIBCXX_CSTDIO
16#include <cstdio>
17#endif
18#ifndef ARBTOOLS_H
19#include "arbtools.h"
20#endif
21
22
23class SuppressOutput : virtual Noncopyable {
24    // temporarily redirect stdout and stderr to /dev/null
25    FILE *devnull;
26    FILE *org_stdout;
27    FILE *org_stderr;
28
29    void flush() {
30        fflush(stdout);
31        fflush(stderr);
32    }
33
34public:
35    void suppress() {
36        if (stdout != devnull) {
37            flush();
38            stdout = devnull;
39            stderr = devnull;
40        }
41    }
42    void dont_suppress() {
43        if (stdout == devnull) {
44            flush();
45            stdout = org_stdout;
46            stderr = org_stderr;
47        }
48    }
49
50    SuppressOutput()
51        : devnull(fopen("/dev/null", "w"))
52        , org_stdout(stdout)
53        , org_stderr(stderr)
54    {
55        suppress();
56    }
57    ~SuppressOutput() {
58        dont_suppress();
59        fclose(devnull);
60    }
61};
62
63#else
64#error SuppressOutput.h included twice
65#endif // SUPPRESSOUTPUT_H
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