src/gromacs/utility/programcontext.cpp

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  36 /*! \internal \file
  37  * \brief
  38  * Implements gmx::IProgramContext and related methods.
  39  *
  40  * \author Teemu Murtola <teemu.murtola@gmail.com>
  41  * \ingroup module_utility
  42  */
  43 #include "gmxpre.h"
  44
  45 #include "programcontext.h"
  46
  47 #include <cstddef>
  48
  49 namespace gmx
  50 {
  51
  52 namespace
  53 {
  54
  55 //! \addtogroup module_utility
  56 //! \{
  57
  58 /*! \brief
  59  * Default implementation of IProgramContext.
  60  *
  61  * This implementation is used if nothing has been set with
  62  * setProgramContext().
  63  *
  64  * Since it is constructed using a global initializer, it should not throw.
  65  */
  66 class DefaultProgramContext : public IProgramContext
  67 {
  68 public:
  69     DefaultProgramContext() {}
  70
  71     const char*            programName() const override { return "GROMACS"; }
  72     const char*            displayName() const override { return "GROMACS"; }
  73     const char*            fullBinaryPath() const override { return ""; }
  74     InstallationPrefixInfo installationPrefix() const override
  75     {
  76         return InstallationPrefixInfo("", false);
  77     }
  78     const char* commandLine() const override { return ""; }
  79 };
  80
  81 //! Global program info; stores the object set with setProgramContext().
  82 const IProgramContext* g_programContext;
  83 //! Default program context if nothing is set.
  84 const DefaultProgramContext g_defaultContext;
  85
  86 //! \}
  87
  88 } // namespace
  89
  90 const IProgramContext& getProgramContext()
  91 {
  92     if (g_programContext != nullptr)
  93     {
  94         return *g_programContext;
  95     }
  96     return g_defaultContext;
  97 }
  98
  99 void setProgramContext(const IProgramContext* programContext)
 100 {
 101     g_programContext = programContext;
 102 }
 103
 104 } // namespace gmx