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35 /*! \defgroup module_utility Low-Level Utilities (utility)
36 * \ingroup group_utilitymodules
38 * Provides low-level utilities for error handling and other tasks.
40 * This module provides various low-level utilities for tasks such as error
41 * handling and string formatting, as well as helper classes and common custom
42 * containers to simplify implementation of other code. Contents of the module
43 * are discussed in more details under the different headings below.
44 * Some of the code in installed headers in the module is intended for use
45 * directly from code outside the Gromacs library, but a significant portion is
46 * exposed only because other public headers depend on it.
48 * Since this module implements error handling, it should be at the lowest
49 * level: it should not depend on other modules. Any functionality needed by
50 * the error handling code should also be kept in this module.
52 * <H3>Error Handling</H3>
54 * Exception classes used in the library are declared in the exceptions.h header
55 * file. Most Gromacs-specific exceptions derive from gmx::GromacsException.
57 * This header also declares a ::GMX_THROW macro that should be used for
58 * throwing exceptions. ::GMX_THROW_WITH_ERRNO is also provided for reporting
59 * syscall errors, but its use should be mostly limited to within the library.
60 * This header also declares helper functions printFatalErrorMessage(),
61 * formatExceptionMessageToString(), formatExceptionMessageToFile(), and
62 * translateException() for creating standard error messages and translating
63 * exceptions to error return codes. processExceptionAtExit() provides
64 * clean-up code before exiting the program after an exception.
65 * To help in cases where bottom-up conversion to C++ is appropriate, macro
66 * ::GMX_CATCH_ALL_AND_EXIT_WITH_FATAL_ERROR is also provided to catch all
67 * exceptions at C++ to C boundary.
69 * Use of error return codes should be avoided in new code except in C wrappers
70 * and similar, but to ease migration (and for these cases where they are
71 * necessary), facilities for handling them are provided by the errorcodes.h
73 * It provides a set of error codes (the enum \ref gmx::ErrorCode) that should
74 * be used for return codes in functions.
75 * It also provides macros ::GMX_ERROR and ::GMX_ERROR_NORET that should be
76 * used for returning an error code. setFatalErrorHandler() is provided to
77 * alter the behavior of ::GMX_ERROR and ::GMX_ERROR_NORET. The default
78 * handler prints the reason of the error to \c stderr and aborts the
81 * Header file gmxassert.h is also provided for assertions. It declares macros
82 * ::GMX_ASSERT and ::GMX_RELEASE_ASSERT that should be used for assertions.
85 * Internally, functions from errorformat.h are used for all the above cases to
86 * format error messages to \c stderr.
90 * <H3>Basic %File Handling</H3>
92 * The header file.h declares a gmx::File class for basic I/O support.
94 * The header path.h declares helpers for manipulating paths and for managing
97 * The fate of these headers depends on what is decided in Redmine issue #950.
100 * <H3>Implementation Helpers</H3>
102 * The header common.h implements a gmx::PrivateImplPointer template for easily
103 * writing classes that use the private implementation idiom. This header also
104 * declares ::GMX_DISALLOW_COPY_AND_ASSIGN and ::GMX_DISALLOW_ASSIGN macros for
105 * class declarations, and ::GMX_IGNORE_RETURN_VALUE for cleanly ignoring a
106 * return value from a function.
108 * The header flags.h implements a gmx::FlagsTemplate template for better type
109 * safety when using bit flag fields.
112 * <H3>Other Functionality</H3>
114 * The header init.h declares gmx::init() and gmx::finalize() for initializing
115 * and deinitializing the Gromacs library.
117 * The header arrayref.h implements a gmx::ConstArrayRef class for exposing a
118 * C array or part of a std::vector (basically, any continuous stretch of
119 * memory) throuh a std::vector-like interface.
121 * The header stringutil.h declares various string utility routines.
125 * The header gmxmpi.h abstracts away the mechanism of including either MPI or
126 * thread-MPI headers depending on compilation options.
127 * Similarly, gmxomp.h removes the need to use conditional compilation for code
128 * that needs to include omp.h for OpenMP functions.
130 * The header gmxregex.h declares gmx::Regex and regexMatch() for basic regular
131 * expression matching using an interface similar to C++11.
133 * The header messagestringcollector.h declares a gmx::MessageStringCollector
134 * class for composing messages with context information.
136 * The header programcontext.h declares a gmx::ProgramContextInterface that is
138 * initialize and access information about the running program, such as the
139 * name and path of the executable. This information is used, e.g., by the
140 * error handling code in formatting standard error messages.
142 * The header qsort_threadsafe.h provides a guaranteed threadsafe
143 * implementation for qsort().
145 * The header uniqueptr.h declares gmx::gmx_unique_ptr, which is intended for
146 * declaring smart pointer types with unique ownership.
150 * \author Teemu Murtola <teemu.murtola@gmail.com>
154 * Public API convenience header for low-level utilities.
156 * \author Teemu Murtola <teemu.murtola@gmail.com>
158 * \ingroup module_utility
160 #ifndef GMX_UTILITY_H
161 #define GMX_UTILITY_H
163 #include "utility/errorcodes.h"
164 #include "utility/exceptions.h"
165 #include "utility/gmxassert.h"
166 #include "utility/init.h"
167 #include "utility/programcontext.h"