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37 * Declares gmx::CommandLineModuleInterface and supporting classes.
39 * \author Teemu Murtola <teemu.murtola@gmail.com>
41 * \ingroup module_commandline
43 #ifndef GMX_COMMANDLINE_CMDLINEMODULE_H
44 #define GMX_COMMANDLINE_CMDLINEMODULE_H
46 #include "gromacs/utility/common.h"
51 class CommandLineHelpContext;
54 * Settings to pass information between a module and the general runner.
56 * Methods in this class do not throw, except that construction may throw
60 * \ingroup module_commandline
62 class CommandLineModuleSettings
65 CommandLineModuleSettings();
66 ~CommandLineModuleSettings();
68 //! Returns the default nice level for this module.
69 int defaultNiceLevel() const;
72 * Sets the default nice level for this module.
74 * If not called, the module will be niced.
76 void setDefaultNiceLevel(int niceLevel);
81 PrivateImplPointer<Impl> impl_;
85 * Module that can be run from command line using CommandLineModuleManager.
87 * \see CommandLineModuleManager
90 * \ingroup module_commandline
92 class CommandLineModuleInterface
95 virtual ~CommandLineModuleInterface() {}
97 //! Returns the name of the module.
98 virtual const char *name() const = 0;
99 //! Returns a one-line description of the module.
100 virtual const char *shortDescription() const = 0;
103 * Initializes the module and provides settings for the runner.
105 * This will be called before run(), and can be used to adjust
106 * initialization that the runner does.
108 virtual void init(CommandLineModuleSettings *settings) = 0;
110 * Runs the module with the given arguments.
112 * \param[in] argc Number of elements in \p argv.
113 * \param[in] argv Command-line arguments.
114 * \throws unspecified May throw exceptions to indicate errors.
115 * \returns Exit code for the program.
116 * \retval 0 on successful termination.
118 * \p argv[0] is the name of the module, i.e., the arguments are as if
119 * the module was run as a standalone executable.
121 virtual int run(int argc, char *argv[]) = 0;
123 * Prints help for the module.
125 * \param[in] context Context object for writing the help.
126 * \throws std::bad_alloc if out of memory.
127 * \throws FileIOError on any I/O error.
129 * Note that for MPI-enabled builds, this is called only on the master
132 virtual void writeHelp(const CommandLineHelpContext &context) const = 0;
136 /*! \libinternal \brief
137 * Helper to implement CommandLineModuleInterface::writeHelp() with a C-like
138 * main() function that calls parse_common_args().
140 * \param[in] context Context object for writing the help.
141 * \param[in] name Name of the module.
142 * \param[in] mainFunction C-like main() function that calls parse_common_args().
144 * \ingroup module_commandline
146 void writeCommandLineHelpCMain(
147 const CommandLineHelpContext &context, const char *name,
148 int (*mainFunction)(int argc, char *argv[]));