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/* This file is part of the GNU plotutils package. Copyright (C) 1995,
1996, 1997, 1998, 1999, 2000, 2005, 2008, Free Software Foundation, Inc.
The GNU plotutils package is free software. You may 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, or (at your
option) any later version.
The GNU plotutils package 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 the GNU plotutils package; see the file COPYING. If not, write to
the Free Software Foundation, Inc., 51 Franklin St., Fifth Floor,
Boston, MA 02110-1301, USA. */
/* This file contains the generic warning and error methods. They simply
write the specified message to the plotter error stream, if it has one.
There is provision for user-specifiable warning/error message handlers
(not yet documented). */
/* All libplot warnings and error messages go through these functions, with
the exception of libpng error messages produced by PNG Plotters (see
z_write.c; they're different because they need to be produced by
callbacks). */
#include "sys-defines.h"
#include "extern.h"
/* mutex for locking the warning/error message subsystem */
#ifdef PTHREAD_SUPPORT
#ifdef HAVE_PTHREAD_H
pthread_mutex_t _message_mutex = PTHREAD_MUTEX_INITIALIZER;
#endif
#endif
/* user-settable handlers, defined in g_defplot.c to be NULL */
extern int (*pl_libplot_warning_handler) (const char *msg);
extern int (*pl_libplot_error_handler) (const char *msg);
void
_pl_g_warning (R___(Plotter *_plotter) const char *msg)
{
#ifdef PTHREAD_SUPPORT
#ifdef HAVE_PTHREAD_H
/* lock the message subsystem */
pthread_mutex_lock (&_message_mutex);
#endif
#endif
if (pl_libplot_warning_handler != NULL)
(*pl_libplot_warning_handler)(msg);
else if (_plotter->data->errfp)
fprintf (_plotter->data->errfp, "libplot: %s\n", msg);
#ifdef LIBPLOTTER
else if (_plotter->data->errstream)
(*(_plotter->data->errstream)) << "libplot: " << msg << '\n';
#endif
#ifdef PTHREAD_SUPPORT
#ifdef HAVE_PTHREAD_H
/* unlock the message subsystem */
pthread_mutex_unlock (&_message_mutex);
#endif
#endif
}
void
_pl_g_error (R___(Plotter *_plotter) const char *msg)
{
#ifdef PTHREAD_SUPPORT
#ifdef HAVE_PTHREAD_H
/* lock the message subsystem */
pthread_mutex_lock (&_message_mutex);
#endif
#endif
if (pl_libplot_error_handler != NULL)
(*pl_libplot_error_handler)(msg);
else if (_plotter->data->errfp)
fprintf (_plotter->data->errfp, "libplot error: %s\n", msg);
#ifdef LIBPLOTTER
else if (_plotter->data->errstream)
(*(_plotter->data->errstream)) << "libplot error: " << msg << '\n';
#endif
#ifdef PTHREAD_SUPPORT
#ifdef HAVE_PTHREAD_H
/* unlock the message subsystem */
pthread_mutex_unlock (&_message_mutex);
#endif
#endif
}
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