cs_base.h

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#ifndef CS_BASE_H
#define CS_BASE_H
 
/*============================================================================
 * Definitions, global variables, and base functions
 *============================================================================*/
 
/*
  This file is part of code_saturne, a general-purpose CFD tool.
 
  Copyright (C) 1998-2026 EDF S.A.
 
  This program is free software; you can redistribute it and/or modify it under
  the terms of the GNU General Public License as published by the Free Software
  Foundation; either version 2 of the License, or (at your option) any later
  version.
 
  This program is distributed in the hope that it will be useful, but WITHOUT
  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
  details.
 
  You should have received a copy of the GNU General Public License along with
  this program; if not, write to the Free Software Foundation, Inc., 51 Franklin
  Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
 
/*----------------------------------------------------------------------------*/
 
#include "base/cs_defs.h"
 
/*----------------------------------------------------------------------------
 * Standard C library headers
 *----------------------------------------------------------------------------*/
 
#include <stdio.h>
 
/*----------------------------------------------------------------------------
 *  Local headers
 *----------------------------------------------------------------------------*/
 
/*=============================================================================
 * Macro definitions
 *============================================================================*/
 
/* Application type name */
 
#define CS_APP_NAME     "code_saturne"
#define CS_APP_VERSION  PACKAGE_VERSION  /* PACKAGE_VERSION from autoconf */
 
/* System type name */
 
#if defined(__linux__) || defined(__linux) || defined(linux)
#define _CS_ARCH_Linux
 
#endif
 
/* On certain architectures such as IBM Blue Gene, some operations may
 * be better optimized on memory-aligned data (if 0 here, no alignment
 * is leveraged). This alignment is not exploited yet in code_saturne. */
 
#define CS_MEM_ALIGN  0
 
#define CS_BASE_STRING_LEN  80
 
/*============================================================================
 * Type definitions
 *============================================================================*/
 
/* Function pointers for extra cleanup operations to be called when
   entering cs_exit() or bft_error() */
 
typedef void (cs_base_atexit_t) (void);
 
/* Function pointers for SIGINT (or similar) handler */
 
typedef void (cs_base_sigint_handler_t) (int signum);
 
/*=============================================================================
 * Global variable definitions
 *============================================================================*/
 
#if defined(HAVE_ACCEL)
 
extern int cs_mpi_device_support;
 
#else
 
#define cs_mpi_device_support 0
 
#endif
 
/*=============================================================================
 * Public function prototypes
 *============================================================================*/
 
/*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*/
 
inline const char *
cs_base_strtf(bool  boolean)
{
  if (boolean)
    return "*True*";
  else
    return "*False*";
}
 
/*----------------------------------------------------------------------------
 * First analysis of the command line to determine an application name.
 *
 * If no name is defined by the command line, a name is determined based
 * on the working directory.
 *
 * The caller is responsible for freeing the returned string.
 *
 * parameters:
 *   argc  <-- number of command line arguments
 *   argv  <-- array of command line arguments
 *
 * returns:
 *   pointer to character string with application name
 *----------------------------------------------------------------------------*/
 
char *
cs_base_get_app_name(int          argc,
                     const char  *argv[]);
 
/*----------------------------------------------------------------------------
 * Print logfile header
 *
 * parameters:
 *   argc  <-- number of command line arguments
 *   argv  <-- array of command line arguments
 *----------------------------------------------------------------------------*/
 
void
cs_base_logfile_head(int    argc,
                     char  *argv[]);
 
#if defined(HAVE_MPI)
 
/*----------------------------------------------------------------------------
 * First analysis of the command line and environment variables to determine
 * if we require MPI, and initialization if necessary.
 *
 * parameters:
 *   argc  <-> number of command line arguments
 *   argv  <-> array of command line arguments
 *
 * Global variables `cs_glob_n_ranks' (number of code_saturne processes)
 * and `cs_glob_rank_id' (rank of local process) are set by this function.
 *----------------------------------------------------------------------------*/
 
void
cs_base_mpi_init(int    *argc,
                 char  **argv[]);
 
/*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*/
 
MPI_Comm
cs_base_get_rank_step_comm(int  rank_step);
 
/*----------------------------------------------------------------------------
 * Return a reduced communicator matching a multiple of the total
 * number of ranks, and given a parent communicator.
 *
 * Compared to \ref cs_base_get_rank_step_comm, this function is
 * collective only on the provided communicator.
 *
 * This updates the number of reduced communicators if necessary.
 *
 * parameters:
 *   parent_comm <-- associated parent communicator (must be either
 *                   cs_glob_mpi_comm or a communicator returned by a
 *                   previous
 *   rank_step   <-- associated multiple of ranks of parent communicator
 *----------------------------------------------------------------------------*/
 
MPI_Comm
cs_base_get_rank_step_comm_recursive(MPI_Comm  parent_comm,
                                     int       rank_step);
 
#endif /* defined(HAVE_MPI) */
 
/*----------------------------------------------------------------------------
 * Exit, with handling for both normal and error cases.
 *
 * Finalize MPI if necessary.
 *
 * parameters:
 *   status <-- value to be returned to the parent:
 *              EXIT_SUCCESS / 0 for the normal case,
 *              EXIT_FAILURE or other nonzero code for error cases.
 *----------------------------------------------------------------------------*/
 
void
cs_exit(int  status);
 
/*----------------------------------------------------------------------------
 * Initialize error and signal handlers.
 *
 * parameters:
 *   signal_defaults <-- leave default signal handlers in place if true
 *----------------------------------------------------------------------------*/
 
void
cs_base_error_init(bool  signal_defaults);
 
/*----------------------------------------------------------------------------
 * Initialize management of memory allocated through BFT.
 *----------------------------------------------------------------------------*/
 
void
cs_base_mem_init(void);
 
/*----------------------------------------------------------------------------
 * Finalize management of memory allocated through BFT.
 *
 * A summary of the consumed memory is given.
 *----------------------------------------------------------------------------*/
 
void
cs_base_mem_finalize(void);
 
/*----------------------------------------------------------------------------
 * Restore signal handlers in case they were modified by another application.
 *----------------------------------------------------------------------------*/
 
void
cs_base_signal_restore(void);
 
/*----------------------------------------------------------------------------
 * Print summary of running time, including CPU and elapsed times.
 *----------------------------------------------------------------------------*/
 
void
cs_base_time_summary(void);
 
/*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*/
 
void
cs_base_update_status(const char  *format,
                      ...);
 
/*----------------------------------------------------------------------------
 * Set tracing of progress on or off.
 *
 * This function should be called before cs_base_bft_printf_set() if tracing
 * is activated.
 *
 * parameters:
 *   trace  <-- trace progress to stdout
 *----------------------------------------------------------------------------*/
 
void
cs_base_trace_set(bool  trace);
 
/*----------------------------------------------------------------------------
 * Set output file name and suppression flag for bft_printf().
 *
 * This allows redirecting or suppressing logging for different ranks.
 *
 * parameters:
 *   log_name    <-- base file name for log
 *   rn_log_flag <-- redirection for ranks > 0 log:
 *                   false: to "/dev/null" (suppressed)
 *                   true: to <log_name>_r*.log" file;
 *----------------------------------------------------------------------------*/
 
void
cs_base_bft_printf_init(const char  *log_name,
                        bool         rn_log_flag);
 
/*----------------------------------------------------------------------------
 * Replace default bft_printf() mechanism with internal mechanism.
 *
 * This allows redirecting or suppressing logging for different ranks.
 *
 * parameters:
 *   log_name    <-- base file name for log
 *   rn_log_flag <-- redirection for ranks > 0 log:
 *                   false: to "/dev/null" (suppressed)
 *                   true: to <log_name>_r*.log" file;
 *----------------------------------------------------------------------------*/
 
void
cs_base_bft_printf_set(const char  *log_name,
                       bool         rn_log_flag);
 
/*----------------------------------------------------------------------------
 * Return name of default log file.
 *
 * cs_base_bft_printf_set or cs_base_c_bft_printf_set() must have
 * been called before this.
 *
 * returns:
 *   name of default log file
 *----------------------------------------------------------------------------*/
 
const char *
cs_base_bft_printf_name(void);
 
/*----------------------------------------------------------------------------
 * Return flag indicating if the default log file output is suppressed.
 *
 * cs_base_bft_printf_set or cs_base_c_bft_printf_set() must have
 * been called before this.
 *
 * returns:
 *   output suppression flag
 *----------------------------------------------------------------------------*/
 
bool
cs_base_bft_printf_suppressed(void);
 
/*----------------------------------------------------------------------------
 * Print a warning message header.
 *
 * parameters:
 *   file_name <-- name of source file
 *   line_nume <-- line number in source file
 *----------------------------------------------------------------------------*/
 
void
cs_base_warn(const char  *file_name,
             int          line_num);
 
/*----------------------------------------------------------------------------
 * Define a function to be called when entering cs_exit() or bft_error().
 *
 * Compared to the C atexit(), only one function may be called (latest
 * setting wins), but the function is called slightly before exit,
 * so it is well adapted to cleanup such as flushing of non-C API logging.
 *
 * parameters:
 *   fct <-- pointer tu function to be called
 *----------------------------------------------------------------------------*/
 
void
cs_base_atexit_set(cs_base_atexit_t  *const fct);
 
/*----------------------------------------------------------------------------
 * Set handler function for SIGINT or similar.
 *
 * When first encountered, SIGINT will call that handler if present,
 * then revert to the general handler if encountered again.
 *
 * parameters:
 *   h <-- pointer to function to be called
 *----------------------------------------------------------------------------*/
 
void
cs_base_sigint_handler_set(cs_base_sigint_handler_t  *const h);
 
/*----------------------------------------------------------------------------
 * Clean a string representing options.
 *
 * Characters are converted to lowercase, leading and trailing whitespace
 * is removed, and multiple whitespaces or tabs are replaced by single
 * spaces.
 *
 * parameters:
 *   s <-> string to be cleaned
 *----------------------------------------------------------------------------*/
 
void
cs_base_option_string_clean(char  *s);
 
/*----------------------------------------------------------------------------
 * Return a string providing locale path information.
 *
 * This is normally the path determined upon configuration, but may be
 * adapted for movable installs using the CS_ROOT_DIR environment variable.
 *
 * returns:
 *   locale path
 *----------------------------------------------------------------------------*/
 
const char *
cs_base_get_localedir(void);
 
/*----------------------------------------------------------------------------
 * Return a string providing package data path information.
 *
 * This is normally the path determined upon configuration, but may be
 * adapted for movable installs using the CS_ROOT_DIR environment variable.
 *
 * returns:
 *   package data path
 *----------------------------------------------------------------------------*/
 
const char *
cs_base_get_pkgdatadir(void);
 
/*----------------------------------------------------------------------------
 * Return a string providing loadable library path information.
 *
 * This is normally the path determined upon configuration, but may be
 * adapted for movable installs using the CS_ROOT_DIR environment variable.
 *
 * returns:
 *   package loadable library (plugin) path
 *----------------------------------------------------------------------------*/
 
const char *
cs_base_get_pkglibdir(void);
 
/*----------------------------------------------------------------------------
 * Ensure bool argument has value 0 or 1.
 *
 * This allows working around issues with Intel compiler C bindings,
 * which seem to pass incorrect values in some cases.
 *
 * parameters:
 *   b <-> pointer to bool
 *----------------------------------------------------------------------------*/
 
void
cs_base_check_bool(bool *b);
 
/*----------------------------------------------------------------------------
 * Open a data file in read mode.
 *
 * If a file of the given name in the working directory is found, it
 * will be opened. Otherwise, it will be searched for in the "data/thch"
 * subdirectory of pkgdatadir.
 *
 * parameters:
 *   base_name      <-- base file name
 *
 * returns:
 *   pointer to opened file
 *----------------------------------------------------------------------------*/
 
FILE *
cs_base_open_properties_data_file(const char  *base_name);
 
#if defined(HAVE_DLOPEN)
 
/*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*/
 
void*
cs_base_dlopen(const char *filename);
 
/*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*/
 
void*
cs_base_dlopen_plugin(const char *name);
 
/*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*/
 
int
cs_base_dlopen_get_flags(void);
 
/*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*/
 
void
cs_base_dlopen_set_flags(int flags);
 
/*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*/
 
void
cs_base_dlclose(const char  *filename,
                void        *handle);
 
/*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*/
 
void *
cs_base_get_dl_function_pointer(void        *handle,
                                const char  *name,
                                bool         errors_are_fatal);
 
#endif /* defined(HAVE_DLOPEN) */
 
/*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*/
 
void
cs_base_backtrace_dump(FILE  *f,
                       int    lv_start);
 
/*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*/
 
void
cs_base_at_finalize(cs_base_atexit_t  *func);
 
/*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*/
 
void
cs_base_finalize_sequence(void);
 
/*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*/
 
void
cs_base_get_run_identity(char  **run_id,
                         char  **case_name,
                         char  **study_name);
 
/*----------------------------------------------------------------------------*/
 
#endif /* CS_BASE_H */