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/* $Id$ */
/*
* Copyright (C)2003-2006 Benny Prijono <benny@prijono.org>
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <pj/except.h>
#include <pj/os.h>
#include <pj/assert.h>
#include <pj/log.h>
#include <pj/errno.h>
#include <pj/string.h>
static long thread_local_id = -1;
#if defined(PJ_HAS_EXCEPTION_NAMES) && PJ_HAS_EXCEPTION_NAMES != 0
static const char *exception_id_names[PJ_MAX_EXCEPTION_ID];
#else
/*
* Start from 1 (not 0)!!!
* Exception 0 is reserved for normal path of setjmp()!!!
*/
static int last_exception_id = 1;
#endif /* PJ_HAS_EXCEPTION_NAMES */
#if !defined(PJ_EXCEPTION_USE_WIN32_SEH) || PJ_EXCEPTION_USE_WIN32_SEH==0
PJ_DEF(void) pj_throw_exception_(int exception_id)
{
struct pj_exception_state_t *handler;
handler = pj_thread_local_get(thread_local_id);
if (handler == NULL) {
PJ_LOG(1,("except.c", "!!!FATAL: unhandled exception %s!\n",
pj_exception_id_name(exception_id)));
pj_assert(handler != NULL);
/* This will crash the system! */
}
pj_longjmp(handler->state, exception_id);
}
static void exception_cleanup(void)
{
if (thread_local_id != -1) {
pj_thread_local_free(thread_local_id);
thread_local_id = -1;
}
#if defined(PJ_HAS_EXCEPTION_NAMES) && PJ_HAS_EXCEPTION_NAMES != 0
{
unsigned i;
for (i=0; i<PJ_MAX_EXCEPTION_ID; ++i)
exception_id_names[i] = NULL;
}
#else
last_exception_id = 1;
#endif
}
PJ_DEF(void) pj_push_exception_handler_(struct pj_exception_state_t *rec)
{
struct pj_exception_state_t *parent_handler = NULL;
if (thread_local_id == -1) {
pj_thread_local_alloc(&thread_local_id);
pj_assert(thread_local_id != -1);
pj_atexit(&exception_cleanup);
}
parent_handler = pj_thread_local_get(thread_local_id);
rec->prev = parent_handler;
pj_thread_local_set(thread_local_id, rec);
}
PJ_DEF(void) pj_pop_exception_handler_(void)
{
struct pj_exception_state_t *handler;
handler = pj_thread_local_get(thread_local_id);
pj_assert(handler != NULL);
pj_thread_local_set(thread_local_id, handler->prev);
}
#endif
#if defined(PJ_HAS_EXCEPTION_NAMES) && PJ_HAS_EXCEPTION_NAMES != 0
PJ_DEF(pj_status_t) pj_exception_id_alloc( const char *name,
pj_exception_id_t *id)
{
unsigned i;
pj_enter_critical_section();
/*
* Start from 1 (not 0)!!!
* Exception 0 is reserved for normal path of setjmp()!!!
*/
for (i=1; i<PJ_MAX_EXCEPTION_ID; ++i) {
if (exception_id_names[i] == NULL) {
exception_id_names[i] = name;
*id = i;
pj_leave_critical_section();
return PJ_SUCCESS;
}
}
pj_leave_critical_section();
return PJ_ETOOMANY;
}
PJ_DEF(pj_status_t) pj_exception_id_free( pj_exception_id_t id )
{
/*
* Start from 1 (not 0)!!!
* Exception 0 is reserved for normal path of setjmp()!!!
*/
PJ_ASSERT_RETURN(id>0 && id<PJ_MAX_EXCEPTION_ID, PJ_EINVAL);
pj_enter_critical_section();
exception_id_names[id] = NULL;
pj_leave_critical_section();
return PJ_SUCCESS;
}
PJ_DEF(const char*) pj_exception_id_name(pj_exception_id_t id)
{
static char unknown_name[32];
/*
* Start from 1 (not 0)!!!
* Exception 0 is reserved for normal path of setjmp()!!!
*/
PJ_ASSERT_RETURN(id>0 && id<PJ_MAX_EXCEPTION_ID, "<Invalid ID>");
if (exception_id_names[id] == NULL) {
pj_ansi_snprintf(unknown_name, sizeof(unknown_name),
"exception %d", id);
return unknown_name;
}
return exception_id_names[id];
}
#else /* PJ_HAS_EXCEPTION_NAMES */
PJ_DEF(pj_status_t) pj_exception_id_alloc( const char *name,
pj_exception_id_t *id)
{
PJ_ASSERT_RETURN(last_exception_id < PJ_MAX_EXCEPTION_ID-1, PJ_ETOOMANY);
*id = last_exception_id++;
return PJ_SUCCESS;
}
PJ_DEF(pj_status_t) pj_exception_id_free( pj_exception_id_t id )
{
return PJ_SUCCESS;
}
PJ_DEF(const char*) pj_exception_id_name(pj_exception_id_t id)
{
return "";
}
#endif /* PJ_HAS_EXCEPTION_NAMES */
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