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re PR libstdc++/26132 (tr1/hashtable: rehash not implemented)

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2006-02-22  Paolo Carlini  <pcarlini@suse.de>

	PR libstdc++/26132
	* include/tr1/hashtable (hashtable<>::rehash): Define.
	* testsuite/tr1/6_containers/unordered/hashtable/26132.cc: New.

	* include/tr1/hashtable: Trivial formatting and stylistic fixes.

	* testsuite/tr1/headers.cc: remove <tr1/hashtable>, not a tr1 header,
	only an implementation detail.

From-SVN: r111366
This commit is contained in:
Paolo Carlini 2006-02-22 17:05:58 +00:00 committed by Paolo Carlini
parent e3a26d2fc5
commit f8190ffc6c
4 changed files with 110 additions and 28 deletions
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11
libstdc++-v3/ChangeLog
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@ -1,3 +1,14 @@
2006-02-22 Paolo Carlini <pcarlini@suse.de>
PR libstdc++/26132
* include/tr1/hashtable (hashtable<>::rehash): Define.
* testsuite/tr1/6_containers/unordered/hashtable/26132.cc: New.
* include/tr1/hashtable: Trivial formatting and stylistic fixes.
* testsuite/tr1/headers.cc: remove <tr1/hashtable>, not a tr1 header,
only an implementation detail.
2006-02-22 Paolo Carlini <pcarlini@suse.de>
* include/debug/list (splice): Remove splice_alloc check, redundant

68
libstdc++-v3/include/tr1/hashtable
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@ -1132,6 +1132,7 @@ _GLIBCXX_BEGIN_NAMESPACE(tr1)
{
return static_cast<float>(size()) / static_cast<float>(bucket_count());
}
// max_load_factor, if present, comes from rehash_base.
// Generalization of max_load_factor. Extension, not found in TR1. Only
@ -1226,7 +1227,7 @@ _GLIBCXX_BEGIN_NAMESPACE(tr1)
clear();
public:
// Set number of buckets to be apropriate for container of n element.
// Set number of buckets to be appropriate for container of n element.
void rehash(size_type n);
private:
@ -1306,7 +1307,7 @@ _GLIBCXX_BEGIN_NAMESPACE(tr1)
// We allocate one extra bucket to hold a sentinel, an arbitrary
// non-null pointer. Iterator increment relies on this.
node** p = alloc.allocate(n + 1);
std::fill(p, p+n, (node*) 0);
std::fill(p, p + n, (node*) 0);
p[n] = reinterpret_cast<node*>(0x1000);
return p;
}
@ -1320,7 +1321,7 @@ _GLIBCXX_BEGIN_NAMESPACE(tr1)
m_deallocate_buckets(node** p, size_type n)
{
bucket_allocator_t alloc(m_node_allocator);
alloc.deallocate(p, n+1);
alloc.deallocate(p, n + 1);
}
template<typename K, typename V,
@ -1356,11 +1357,11 @@ _GLIBCXX_BEGIN_NAMESPACE(tr1)
const Eq& eq, const Ex& exk,
const allocator_type& a)
: Internal::rehash_base<RP, hashtable>(),
Internal::hash_code_base<K, V, Ex, Eq, H1, H2, H, c> (exk, eq,
h1, h2, h),
Internal::hash_code_base<K, V, Ex, Eq, H1, H2, H, c>(exk, eq,
h1, h2, h),
Internal::map_base<K, V, Ex, u, hashtable>(),
m_node_allocator(a),
m_bucket_count (0),
m_bucket_count(0),
m_element_count(0),
m_rehash_policy()
{
@ -1396,10 +1397,10 @@ _GLIBCXX_BEGIN_NAMESPACE(tr1)
m_element_count(ht.m_element_count),
m_rehash_policy(ht.m_rehash_policy)
{
m_buckets = m_allocate_buckets (m_bucket_count);
m_buckets = m_allocate_buckets(m_bucket_count);
try
{
for (size_t i = 0; i < ht.m_bucket_count; ++i)
for (size_type i = 0; i < ht.m_bucket_count; ++i)
{
node* n = ht.m_buckets[i];
node** tail = m_buckets + i;
@ -1415,7 +1416,7 @@ _GLIBCXX_BEGIN_NAMESPACE(tr1)
catch(...)
{
clear();
m_deallocate_buckets (m_buckets, m_bucket_count);
m_deallocate_buckets(m_buckets, m_bucket_count);
__throw_exception_again;
}
}
@ -1520,7 +1521,7 @@ _GLIBCXX_BEGIN_NAMESPACE(tr1)
{
typename hashtable::hash_code_t code = this->m_hash_code(k);
std::size_t n = this->bucket_index(k, code, this->bucket_count());
size_t result = 0;
std::size_t result = 0;
for (node* p = m_buckets[n]; p; p = p->m_next)
if (this->compare(k, code, p))
++result;
@ -1541,7 +1542,7 @@ _GLIBCXX_BEGIN_NAMESPACE(tr1)
typename hashtable::hash_code_t code = this->m_hash_code(k);
std::size_t n = this->bucket_index(k, code, this->bucket_count());
node** head = m_buckets + n;
node* p = find_node (*head, k, code);
node* p = find_node(*head, k, code);
if (p)
{
@ -1604,7 +1605,7 @@ _GLIBCXX_BEGIN_NAMESPACE(tr1)
find_node(node* p, const key_type& k,
typename hashtable::hash_code_t code) const
{
for (; p ; p = p->m_next)
for (; p; p = p->m_next)
if (this->compare(k, code, p))
return p;
return false;
@ -1622,12 +1623,12 @@ _GLIBCXX_BEGIN_NAMESPACE(tr1)
{
const key_type& k = this->m_extract(v);
typename hashtable::hash_code_t code = this->m_hash_code(k);
size_type n = this->bucket_index(k, code, m_bucket_count);
std::size_t n = this->bucket_index(k, code, m_bucket_count);
if (node* p = find_node(m_buckets[n], k, code))
return std::make_pair(iterator(p, m_buckets + n), false);
std::pair<bool, size_t> do_rehash
std::pair<bool, std::size_t> do_rehash
= m_rehash_policy.need_rehash(m_bucket_count, m_element_count, 1);
// Allocate the new node before doing the rehash so that we don't
@ -1671,7 +1672,7 @@ _GLIBCXX_BEGIN_NAMESPACE(tr1)
const key_type& k = this->m_extract(v);
typename hashtable::hash_code_t code = this->m_hash_code(k);
size_type n = this->bucket_index(k, code, m_bucket_count);
std::size_t n = this->bucket_index(k, code, m_bucket_count);
node* new_node = m_allocate_node(v);
node* prev = find_node(m_buckets[n], k, code);
@ -1727,7 +1728,7 @@ _GLIBCXX_BEGIN_NAMESPACE(tr1)
hashtable<K, V, A, Ex, Eq, H1, H2, H, RP, c, ci, u>::
insert(InIter first, InIter last)
{
size_type n_elt = Internal::distance_fw (first, last);
size_type n_elt = Internal::distance_fw(first, last);
std::pair<bool, std::size_t> do_rehash
= m_rehash_policy.need_rehash(m_bucket_count, m_element_count, n_elt);
if (do_rehash.first)
@ -1774,7 +1775,7 @@ _GLIBCXX_BEGIN_NAMESPACE(tr1)
erase(const key_type& k)
{
typename hashtable::hash_code_t code = this->m_hash_code(k);
size_type n = this->bucket_index(k, code, m_bucket_count);
std::size_t n = this->bucket_index(k, code, m_bucket_count);
size_type result = 0;
node** slot = m_buckets + n;
@ -1783,9 +1784,9 @@ _GLIBCXX_BEGIN_NAMESPACE(tr1)
while (*slot && this->compare(k, code, *slot))
{
node* n = *slot;
*slot = n->m_next;
m_deallocate_node(n);
node* p = *slot;
*slot = p->m_next;
m_deallocate_node(p);
--m_element_count;
++result;
}
@ -1833,6 +1834,19 @@ _GLIBCXX_BEGIN_NAMESPACE(tr1)
m_deallocate_nodes(m_buckets, m_bucket_count);
m_element_count = 0;
}
template<typename K, typename V,
typename A, typename Ex, typename Eq,
typename H1, typename H2, typename H, typename RP,
bool c, bool ci, bool u>
void
hashtable<K, V, A, Ex, Eq, H1, H2, H, RP, c, ci, u>::
rehash(size_type n)
{
m_rehash(std::max(m_rehash_policy.next_bkt(n),
m_rehash_policy.bkt_for_elements(m_element_count
+ 1)));
}
template<typename K, typename V,
typename A, typename Ex, typename Eq,
@ -1840,31 +1854,31 @@ _GLIBCXX_BEGIN_NAMESPACE(tr1)
bool c, bool ci, bool u>
void
hashtable<K, V, A, Ex, Eq, H1, H2, H, RP, c, ci, u>::
m_rehash(size_type N)
m_rehash(size_type n)
{
node** new_array = m_allocate_buckets(N);
node** new_array = m_allocate_buckets(n);
try
{
for (size_type i = 0; i < m_bucket_count; ++i)
while (node* p = m_buckets[i])
{
size_type new_index = this->bucket_index(p, N);
std::size_t new_index = this->bucket_index(p, n);
m_buckets[i] = p->m_next;
p->m_next = new_array[new_index];
new_array[new_index] = p;
}
m_deallocate_buckets(m_buckets, m_bucket_count);
m_bucket_count = N;
m_bucket_count = n;
m_buckets = new_array;
}
catch (...)
catch(...)
{
// A failure here means that a hash function threw an exception.
// We can't restore the previous state without calling the hash
// function again, so the only sensible recovery is to delete
// everything.
m_deallocate_nodes(new_array, N);
m_deallocate_buckets(new_array, N);
m_deallocate_nodes(new_array, n);
m_deallocate_buckets(new_array, n);
m_deallocate_nodes(m_buckets, m_bucket_count);
m_element_count = 0;
__throw_exception_again;

58
libstdc++-v3/testsuite/tr1/6_containers/unordered/hashtable/26132.cc Normal file
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@ -0,0 +1,58 @@
// 2006-02-22 Paolo Carlini <pcarlini@suse.de>
//
// Copyright (C) 2006 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 2, 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.
//
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING. If not, write to the Free
// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
// USA.
// 6.3 Unordered associative containers
#include <tr1/unordered_set>
#include <testsuite_hooks.h>
// libstdc++/26132
void test01()
{
bool test __attribute__((unused)) = true;
for (float lf = 1.0; lf < 101.0; lf *= 10.0)
for (int size = 1; size <= 6561; size *= 3)
{
std::tr1::unordered_set<int> us1;
typedef std::tr1::unordered_set<int>::size_type size_type;
us1.max_load_factor(10.0);
for (int i = 0; i < size; ++i)
us1.insert(i);
us1.max_load_factor(lf);
for (int i = 1; i <= 6561; i *= 81)
{
const size_type n = size * 81 / i;
us1.rehash(n);
VERIFY( us1.bucket_count() > us1.size() / us1.max_load_factor() );
VERIFY( us1.bucket_count() >= n );
}
}
}
int main()
{
test01();
return 0;
}

1
libstdc++-v3/testsuite/tr1/headers.cc
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@ -39,7 +39,6 @@
#include <tr1/fenv.h>
#include <tr1/float.h>
#include <tr1/functional>
#include <tr1/hashtable>
#include <tr1/inttypes.h>
#include <tr1/limits.h>
#include <tr1/math.h>