gcc/libstdc++-v3/libsupc++/vec.cc

337 lines
8.0 KiB
C++

// New abi Support -*- C++ -*-
// Copyright (C) 2000, 2001 Free Software Foundation, Inc.
//
// This file is part of GNU CC.
//
// GNU CC 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.
// GNU CC 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 GNU CC; 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.
// Written by Nathan Sidwell, Codesourcery LLC, <nathan@codesourcery.com>
#include <cxxabi.h>
#include <new>
#include <exception>
#include <exception_defines.h>
#include "unwind-cxx.h"
namespace __cxxabiv1
{
namespace
{
struct uncatch_exception
{
uncatch_exception ();
~uncatch_exception () { __cxa_begin_catch (&p->unwindHeader); }
__cxa_exception *p;
};
uncatch_exception::uncatch_exception ()
{
__cxa_eh_globals *globals = __cxa_get_globals_fast ();
p = globals->caughtExceptions;
p->handlerCount -= 1;
globals->caughtExceptions = p->nextException;
globals->uncaughtExceptions += 1;
}
}
// Allocate and construct array.
extern "C" void *
__cxa_vec_new(std::size_t element_count,
std::size_t element_size,
std::size_t padding_size,
void (*constructor) (void *),
void (*destructor) (void *))
{
return __cxa_vec_new2(element_count, element_size, padding_size,
constructor, destructor,
&operator new[], &operator delete []);
}
extern "C" void *
__cxa_vec_new2(std::size_t element_count,
std::size_t element_size,
std::size_t padding_size,
void (*constructor) (void *),
void (*destructor) (void *),
void *(*alloc) (std::size_t),
void (*dealloc) (void *))
{
std::size_t size = element_count * element_size + padding_size;
char *base = static_cast <char *> (alloc (size));
if (padding_size)
{
base += padding_size;
reinterpret_cast <std::size_t *> (base)[-1] = element_count;
}
try
{
__cxa_vec_ctor(base, element_count, element_size,
constructor, destructor);
}
catch (...)
{
{
uncatch_exception ue;
dealloc(base - padding_size);
}
__throw_exception_again;
}
return base;
}
extern "C" void *
__cxa_vec_new3(std::size_t element_count,
std::size_t element_size,
std::size_t padding_size,
void (*constructor) (void *),
void (*destructor) (void *),
void *(*alloc) (std::size_t),
void (*dealloc) (void *, std::size_t))
{
std::size_t size = element_count * element_size + padding_size;
char *base = static_cast<char *>(alloc (size));
if (padding_size)
{
base += padding_size;
reinterpret_cast<std::size_t *>(base)[-1] = element_count;
}
try
{
__cxa_vec_ctor(base, element_count, element_size,
constructor, destructor);
}
catch (...)
{
{
uncatch_exception ue;
dealloc(base - padding_size, size);
}
__throw_exception_again;
}
return base;
}
// Construct array.
extern "C" void
__cxa_vec_ctor(void *array_address,
std::size_t element_count,
std::size_t element_size,
void (*constructor) (void *),
void (*destructor) (void *))
{
std::size_t ix = 0;
char *ptr = static_cast<char *>(array_address);
try
{
if (constructor)
for (; ix != element_count; ix++, ptr += element_size)
constructor(ptr);
}
catch (...)
{
{
uncatch_exception ue;
__cxa_vec_cleanup(array_address, ix, element_size, destructor);
}
__throw_exception_again;
}
}
// Construct an array by copying.
extern "C" void
__cxa_vec_cctor(void *dest_array,
void *src_array,
std::size_t element_count,
std::size_t element_size,
void (*constructor) (void *, void *),
void (*destructor) (void *))
{
std::size_t ix = 0;
char *dest_ptr = static_cast<char *>(dest_array);
char *src_ptr = static_cast<char *>(src_array);
try
{
if (constructor)
for (; ix != element_count;
ix++, src_ptr += element_size, dest_ptr += element_size)
constructor(dest_ptr, src_ptr);
}
catch (...)
{
{
uncatch_exception ue;
__cxa_vec_cleanup(dest_array, ix, element_size, destructor);
}
__throw_exception_again;
}
}
// Destruct array.
extern "C" void
__cxa_vec_dtor(void *array_address,
std::size_t element_count,
std::size_t element_size,
void (*destructor) (void *))
{
if (destructor)
{
char *ptr = static_cast<char *>(array_address);
std::size_t ix = element_count;
ptr += element_count * element_size;
try
{
while (ix--)
{
ptr -= element_size;
destructor(ptr);
}
}
catch (...)
{
{
uncatch_exception ue;
__cxa_vec_cleanup(array_address, ix, element_size, destructor);
}
__throw_exception_again;
}
}
}
// Destruct array as a result of throwing an exception.
// [except.ctor]/3 If a destructor called during stack unwinding
// exits with an exception, terminate is called.
extern "C" void
__cxa_vec_cleanup(void *array_address,
std::size_t element_count,
std::size_t element_size,
void (*destructor) (void *))
{
if (destructor)
{
char *ptr = static_cast <char *> (array_address);
std::size_t ix = element_count;
ptr += element_count * element_size;
try
{
while (ix--)
{
ptr -= element_size;
destructor(ptr);
}
}
catch (...)
{
std::terminate();
}
}
}
// Destruct and release array.
extern "C" void
__cxa_vec_delete(void *array_address,
std::size_t element_size,
std::size_t padding_size,
void (*destructor) (void *))
{
__cxa_vec_delete2(array_address, element_size, padding_size,
destructor,
&operator delete []);
}
extern "C" void
__cxa_vec_delete2(void *array_address,
std::size_t element_size,
std::size_t padding_size,
void (*destructor) (void *),
void (*dealloc) (void *))
{
char *base = static_cast<char *>(array_address);
if (padding_size)
{
std::size_t element_count = reinterpret_cast<std::size_t *>(base)[-1];
base -= padding_size;
try
{
__cxa_vec_dtor(array_address, element_count, element_size,
destructor);
}
catch (...)
{
{
uncatch_exception ue;
dealloc(base);
}
__throw_exception_again;
}
}
dealloc(base);
}
extern "C" void
__cxa_vec_delete3(void *array_address,
std::size_t element_size,
std::size_t padding_size,
void (*destructor) (void *),
void (*dealloc) (void *, std::size_t))
{
char *base = static_cast <char *> (array_address);
std::size_t size = 0;
if (padding_size)
{
std::size_t element_count = reinterpret_cast<std::size_t *> (base)[-1];
base -= padding_size;
size = element_count * element_size + padding_size;
try
{
__cxa_vec_dtor(array_address, element_count, element_size,
destructor);
}
catch (...)
{
{
uncatch_exception ue;
dealloc(base, size);
}
__throw_exception_again;
}
}
dealloc(base, size);
}
} // namespace __cxxabiv1