d37bb17566
lumiera_error_set() now takes an optional extra string which can be used to pass context relevant data along. This string gets copied into the error state so one can easily create it by the tmpbuf_snprintf() facility. Also a lot of places which define errors get fixed according to this.
135 lines
2.9 KiB
C
135 lines
2.9 KiB
C
/*
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error.c - Lumiera Error handling
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Copyright (C) Lumiera.org
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2008, Christian Thaeter <ct@pipapo.org>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <pthread.h>
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#include "lib/error.h"
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/**
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* @file
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* C Error handling in Lumiera.
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*/
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/*
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predefined errors
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*/
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LUMIERA_ERROR_DEFINE (ERRNO, "errno");
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LUMIERA_ERROR_DEFINE (EERROR, "could not initialize error system");
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/* Thread local storage */
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static pthread_key_t lumiera_error_tls;
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static pthread_once_t lumiera_error_initialized = PTHREAD_ONCE_INIT;
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/**
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* Holding error and some context data.
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*/
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struct lumiera_errorcontext_struct
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{
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lumiera_err err;
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char* extra;
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};
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typedef struct lumiera_errorcontext_struct lumiera_errorcontext;
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typedef lumiera_errorcontext* LumieraErrorcontext;
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static void
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lumiera_error_tls_delete (void* err)
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{
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if (err)
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free (((LumieraErrorcontext)err)->extra);
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}
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static void
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lumiera_error_tls_init (void)
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{
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if (!!pthread_key_create (&lumiera_error_tls, lumiera_error_tls_delete))
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LUMIERA_DIE (EERROR);
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}
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LumieraErrorcontext
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lumiera_error_get (void)
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{
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if (lumiera_error_initialized == PTHREAD_ONCE_INIT)
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pthread_once (&lumiera_error_initialized, lumiera_error_tls_init);
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LumieraErrorcontext self = pthread_getspecific (lumiera_error_tls);
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if (!self)
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{
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/* malloc() and not lumiera_malloc() here because nothing else might be initialized when calling this */
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self = malloc (sizeof *self);
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if (!self)
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LUMIERA_DIE (EERROR);
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self->err = NULL;
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self->extra = NULL;
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pthread_setspecific (lumiera_error_tls, self);
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}
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return self;
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}
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lumiera_err
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lumiera_error_set (lumiera_err nerr, const char* extra)
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{
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LumieraErrorcontext self = lumiera_error_get ();
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if (!self->err)
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{
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self->err = nerr;
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free (self->extra);
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if (extra)
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self->extra = strdup (extra);
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else
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self->extra = NULL;
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}
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return self->err;
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}
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lumiera_err
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lumiera_error (void)
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{
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LumieraErrorcontext self = lumiera_error_get ();
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lumiera_err err = self->err;
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if (err)
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self->err = NULL;
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return err;
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}
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const char*
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lumiera_error_extra (void)
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{
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return lumiera_error_get ()->extra;
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}
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lumiera_err
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lumiera_error_peek (void)
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{
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return lumiera_error_get ()->err;
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}
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