gp_hash_table_map_/resize_fn_imps.hpp
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// -*- C++ -*-
// Copyright (C) 2005-2013 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library 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 3, or (at your option) any later
// version.
// This library 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.
// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.
// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
// <http://www.gnu.org/licenses/>.
// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
// Permission to use, copy, modify, sell, and distribute this software
// is hereby granted without fee, provided that the above copyright
// notice appears in all copies, and that both that copyright notice
// and this permission notice appear in supporting documentation. None
// of the above authors, nor IBM Haifa Research Laboratories, make any
// representation about the suitability of this software for any
// purpose. It is provided "as is" without express or implied
// warranty.
/**
* @file gp_hash_table_map_/resize_fn_imps.hpp
* Contains implementations of gp_ht_map_'s resize related functions.
*/
PB_DS_CLASS_T_DEC
inline bool
PB_DS_CLASS_C_DEC::
do_resize_if_needed()
{
if (!resize_base::is_resize_needed())
return false;
resize_imp(resize_base::get_new_size(m_num_e, m_num_used_e));
return true;
}
PB_DS_CLASS_T_DEC
void
PB_DS_CLASS_C_DEC::
do_resize(size_type n)
{ resize_imp(resize_base::get_nearest_larger_size(n)); }
PB_DS_CLASS_T_DEC
inline void
PB_DS_CLASS_C_DEC::
do_resize_if_needed_no_throw()
{
if (!resize_base::is_resize_needed())
return;
__try
{
resize_imp(resize_base::get_new_size(m_num_e, m_num_used_e));
}
__catch(...)
{ }
PB_DS_ASSERT_VALID((*this))
}
PB_DS_CLASS_T_DEC
void
PB_DS_CLASS_C_DEC::
resize_imp(size_type new_size)
{
#ifdef PB_DS_REGRESSION
typename _Alloc::group_adjustor adjust(m_num_e);
#endif
if (new_size == m_num_e)
return;
PB_DS_ASSERT_VALID((*this))
const size_type old_size = m_num_e;
entry_array a_entries_resized = 0;
// Following line might throw an exception.
a_entries_resized = s_entry_allocator.allocate(new_size);
ranged_probe_fn_base::notify_resized(new_size);
m_num_e = new_size;
for (size_type i = 0; i < m_num_e; ++i)
a_entries_resized[i].m_stat = empty_entry_status;
__try
{
resize_imp(a_entries_resized, old_size);
}
__catch(...)
{
erase_all_valid_entries(a_entries_resized, new_size);
m_num_e = old_size;
s_entry_allocator.deallocate(a_entries_resized, new_size);
ranged_probe_fn_base::notify_resized(old_size);
__throw_exception_again;
}
// At this point no exceptions can be thrown.
_GLIBCXX_DEBUG_ONLY(assert_entry_array_valid(a_entries_resized,
traits_base::m_store_extra_indicator,
__FILE__, __LINE__);)
Resize_Policy::notify_resized(new_size);
erase_all_valid_entries(m_entries, old_size);
s_entry_allocator.deallocate(m_entries, old_size);
m_entries = a_entries_resized;
PB_DS_ASSERT_VALID((*this))
}
PB_DS_CLASS_T_DEC
void
PB_DS_CLASS_C_DEC::
resize_imp(entry_array a_entries_resized, size_type old_size)
{
for (size_type pos = 0; pos < old_size; ++pos)
if (m_entries[pos].m_stat == valid_entry_status)
resize_imp_reassign(m_entries + pos, a_entries_resized,
traits_base::m_store_extra_indicator);
}
#include <ext/pb_ds/detail/gp_hash_table_map_/resize_no_store_hash_fn_imps.hpp>
#include <ext/pb_ds/detail/gp_hash_table_map_/resize_store_hash_fn_imps.hpp>