/*
+ * This file is part of the GROMACS molecular simulation package.
*
- * This source code is part of
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+ * Mark Abraham, David van der Spoel, Berk Hess, and Erik Lindahl,
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*
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*
- * Written by David van der Spoel, Erik Lindahl, Berk Hess, and others.
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+ * the research papers on the package. Check out http://www.gromacs.org.
*/
-/*! \defgroup module_utility Low-level Utility Module
+/*! \defgroup module_utility Low-Level Utilities (utility)
* \ingroup group_utilitymodules
* \brief
- * Provides various low-level utilities.
+ * Provides low-level utilities for error handling and other tasks.
*
- * <H3>Handling fatal errors</H3>
+ * This module provides various low-level utilities for tasks such as error
+ * handling and string formatting, as well as helper classes and common custom
+ * containers to simplify implementation of other code. Contents of the module
+ * are discussed in more details under the different headings below.
+ * Some of the code in installed headers in the module is intended for use
+ * directly from code outside the Gromacs library, but a significant portion is
+ * exposed only because other public headers depend on it.
*
- * Exception classes used in the library are defined in the exceptions.h header
- * file. This header also declares a ::GMX_THROW macro that should be used for
- * throwing exceptions. It also declares helper functions formatErrorMessage()
- * and translateException() for creating standard error messages and
- * translating exceptions to error return codes.
+ * Since this module implements error handling, it should be at the lowest
+ * level: it should not depend on other modules. Any functionality needed by
+ * the error handling code should also be kept in this module.
+ *
+ * <H3>Error Handling</H3>
+ *
+ * Exception classes used in the library are declared in the exceptions.h header
+ * file. Most Gromacs-specific exceptions derive from gmx::GromacsException.
+ *
+ * This header also declares a ::GMX_THROW macro that should be used for
+ * throwing exceptions. ::GMX_THROW_WITH_ERRNO is also provided for reporting
+ * syscall errors, but its use should be mostly limited to within the library.
+ * This header also declares helper functions printFatalErrorMessage(),
+ * formatExceptionMessageToString(), formatExceptionMessageToFile(), and
+ * translateException() for creating standard error messages and translating
+ * exceptions to error return codes. processExceptionAtExit() provides
+ * clean-up code before exiting the program after an exception.
+ * To help in cases where bottom-up conversion to C++ is appropriate, macro
+ * ::GMX_CATCH_ALL_AND_EXIT_WITH_FATAL_ERROR is also provided to catch all
+ * exceptions at C++ to C boundary.
*
* Use of error return codes should be avoided in new code except in C wrappers
- * and similar, but for compatibility, facilities for handling them are
- * provided by the errorcodes.h header file. It provides a set of error codes
- * (the enum \ref gmx::ErrorCode) that should be used for return codes in functions.
+ * and similar, but to ease migration (and for these cases where they are
+ * necessary), facilities for handling them are provided by the errorcodes.h
+ * header file.
+ * It provides a set of error codes (the enum \ref gmx::ErrorCode) that should
+ * be used for return codes in functions.
* It also provides macros ::GMX_ERROR and ::GMX_ERROR_NORET that should be
* used for returning an error code. setFatalErrorHandler() is provided to
* alter the behavior of ::GMX_ERROR and ::GMX_ERROR_NORET. The default
- * handler prints the reason of the error to standard error and aborts the
+ * handler prints the reason of the error to \c stderr and aborts the
* execution.
*
* Header file gmxassert.h is also provided for assertions. It declares macros
* ::GMX_ASSERT and ::GMX_RELEASE_ASSERT that should be used for assertions.
*
- * \author Teemu Murtola <teemu.murtola@cbr.su.se>
+ * \if internal
+ * Internally, functions from errorformat.h are used for all the above cases to
+ * format error messages to \c stderr.
+ * \endif
+ *
+ *
+ * <H3>Basic %File Handling</H3>
+ *
+ * The header file.h declares a gmx::File class for basic I/O support.
+ *
+ * The header path.h declares helpers for manipulating paths and for managing
+ * directories.
+ *
+ * The fate of these headers depends on what is decided in Redmine issue #950.
+ *
+ *
+ * <H3>Implementation Helpers</H3>
+ *
+ * The header common.h implements a gmx::PrivateImplPointer template for easily
+ * writing classes that use the private implementation idiom. This header also
+ * declares ::GMX_DISALLOW_COPY_AND_ASSIGN and ::GMX_DISALLOW_ASSIGN macros for
+ * class declarations, and ::GMX_IGNORE_RETURN_VALUE for cleanly ignoring a
+ * return value from a function.
+ *
+ * The header flags.h implements a gmx::FlagsTemplate template for better type
+ * safety when using bit flag fields.
+ *
+ *
+ * <H3>Other Functionality</H3>
+ *
+ * The header init.h declares gmx::init() and gmx::finalize() for initializing
+ * and deinitializing the \Gromacs library.
+ *
+ * The header arrayref.h implements a gmx::ConstArrayRef class for exposing a
+ * C array or part of a std::vector (basically, any continuous stretch of
+ * memory) throuh a std::vector-like interface.
+ *
+ * The header stringutil.h declares various string utility routines.
+ *
+ * \if libapi
+ *
+ * The header gmxmpi.h abstracts away the mechanism of including either MPI or
+ * thread-MPI headers depending on compilation options.
+ * Similarly, gmxomp.h removes the need to use conditional compilation for code
+ * that needs to include omp.h for OpenMP functions.
+ *
+ * The header gmxregex.h declares gmx::Regex and regexMatch() for basic regular
+ * expression matching using an interface similar to C++11.
+ *
+ * The header messagestringcollector.h declares a gmx::MessageStringCollector
+ * class for composing messages with context information.
+ *
+ * The header sysinfo.h declares gmx_getpid() for getting the current process
+ * id.
+ *
+ * The header programcontext.h declares a gmx::ProgramContextInterface that is
+ * used to
+ * initialize and access information about the running program, such as the
+ * name and path of the executable. This information is used, e.g., by the
+ * error handling code in formatting standard error messages.
+ *
+ * The header qsort_threadsafe.h provides a guaranteed threadsafe
+ * implementation for qsort().
+ *
+ * The header uniqueptr.h declares gmx::gmx_unique_ptr, which is intended for
+ * declaring smart pointer types with unique ownership.
+ *
+ * \endif
+ *
+ * \author Teemu Murtola <teemu.murtola@gmail.com>
*/
/*! \file
* \brief
* Public API convenience header for low-level utilities.
*
- * \author Teemu Murtola <teemu.murtola@cbr.su.se>
+ * \author Teemu Murtola <teemu.murtola@gmail.com>
* \inpublicapi
* \ingroup module_utility
*/
#ifndef GMX_UTILITY_H
#define GMX_UTILITY_H
-#include "utility/errorcodes.h"
-#include "utility/exceptions.h"
-#include "utility/gmxassert.h"
+#include "gromacs/utility/errorcodes.h"
+#include "gromacs/utility/exceptions.h"
+#include "gromacs/utility/gmxassert.h"
+#include "gromacs/utility/init.h"
+#include "gromacs/utility/programcontext.h"
#endif
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