mirror of git://gcc.gnu.org/git/gcc.git
128 lines
3.3 KiB
C++
128 lines
3.3 KiB
C++
// -*- C++ -*- Manage the thread-local exception globals.
|
|
// Copyright (C) 2001, 2004 Free Software Foundation, Inc.
|
|
//
|
|
// This file is part of GCC.
|
|
//
|
|
// GCC 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, or (at your option)
|
|
// any later version.
|
|
//
|
|
// GCC 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 GCC; see the file COPYING. If not, write to
|
|
// the Free Software Foundation, 59 Temple Place - Suite 330,
|
|
// Boston, MA 02111-1307, USA.
|
|
|
|
// As a special exception, you may use this file as part of a free software
|
|
// library without restriction. Specifically, if other files instantiate
|
|
// templates or use macros or inline functions from this file, or you compile
|
|
// this file and link it with other files to produce an executable, this
|
|
// file does not by itself cause the resulting executable to be covered by
|
|
// the GNU General Public License. This exception does not however
|
|
// invalidate any other reasons why the executable file might be covered by
|
|
// the GNU General Public License.
|
|
|
|
|
|
#include <exception>
|
|
#include <cstdlib>
|
|
#include "unwind-cxx.h"
|
|
#include "bits/c++config.h"
|
|
#include "bits/gthr.h"
|
|
|
|
using namespace __cxxabiv1;
|
|
|
|
|
|
// Single-threaded fallback buffer.
|
|
static __cxa_eh_globals globals_static;
|
|
|
|
#if __GTHREADS
|
|
static __gthread_key_t globals_key;
|
|
static int use_thread_key = -1;
|
|
|
|
static void
|
|
get_globals_dtor (void *ptr)
|
|
{
|
|
if (ptr)
|
|
{
|
|
__cxa_exception *exn, *next;
|
|
exn = ((__cxa_eh_globals *) ptr)->caughtExceptions;
|
|
while (exn)
|
|
{
|
|
next = exn->nextException;
|
|
_Unwind_DeleteException (&exn->unwindHeader);
|
|
exn = next;
|
|
}
|
|
std::free (ptr);
|
|
}
|
|
}
|
|
|
|
static void
|
|
get_globals_init ()
|
|
{
|
|
use_thread_key =
|
|
(__gthread_key_create (&globals_key, get_globals_dtor) == 0);
|
|
}
|
|
|
|
static void
|
|
get_globals_init_once ()
|
|
{
|
|
static __gthread_once_t once = __GTHREAD_ONCE_INIT;
|
|
if (__gthread_once (&once, get_globals_init) != 0
|
|
|| use_thread_key < 0)
|
|
use_thread_key = 0;
|
|
}
|
|
#endif
|
|
|
|
extern "C" __cxa_eh_globals *
|
|
__cxxabiv1::__cxa_get_globals_fast () throw()
|
|
{
|
|
#if __GTHREADS
|
|
if (use_thread_key)
|
|
return (__cxa_eh_globals *) __gthread_getspecific (globals_key);
|
|
else
|
|
return &globals_static;
|
|
#else
|
|
return &globals_static;
|
|
#endif
|
|
}
|
|
|
|
extern "C" __cxa_eh_globals *
|
|
__cxxabiv1::__cxa_get_globals () throw()
|
|
{
|
|
#if __GTHREADS
|
|
__cxa_eh_globals *g;
|
|
|
|
if (use_thread_key == 0)
|
|
return &globals_static;
|
|
|
|
if (use_thread_key < 0)
|
|
{
|
|
get_globals_init_once ();
|
|
|
|
// Make sure use_thread_key got initialized.
|
|
if (use_thread_key == 0)
|
|
return &globals_static;
|
|
}
|
|
|
|
g = (__cxa_eh_globals *) __gthread_getspecific (globals_key);
|
|
if (! g)
|
|
{
|
|
if ((g = (__cxa_eh_globals *)
|
|
std::malloc (sizeof (__cxa_eh_globals))) == 0
|
|
|| __gthread_setspecific (globals_key, (void *) g) != 0)
|
|
std::terminate ();
|
|
g->caughtExceptions = 0;
|
|
g->uncaughtExceptions = 0;
|
|
}
|
|
|
|
return g;
|
|
#else
|
|
return &globals_static;
|
|
#endif
|
|
}
|