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mt_allocator.h: Tweaks.

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2004-10-14  Benjamin Kosnik  <bkoz@redhat.com>

	* include/ext/mt_allocator.h: Tweaks.
	* src/mt_allocator.cc: Same.

From-SVN: r89052
This commit is contained in:
Benjamin Kosnik 2004-10-14 21:05:24 +00:00 committed by Benjamin Kosnik
parent ed67425158
commit 11aaaa84ae
3 changed files with 23 additions and 22 deletions
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5
libstdc++-v3/ChangeLog
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@ -1,3 +1,8 @@
2004-10-14 Benjamin Kosnik <bkoz@redhat.com>
* include/ext/mt_allocator.h: Tweaks.
* src/mt_allocator.cc: Same.
2004-10-14 Dhruv Matani <dhruvbird@gmx.net>
* ext/bitmap_allocator.h: Clean-up add/remove functions.

2
libstdc++-v3/include/ext/mt_allocator.h
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@ -705,7 +705,7 @@ namespace __gnu_cxx
// Already reserved.
typedef typename __pool_type::_Block_record _Block_record;
_Block_record* __block = __bin._M_first[__thread_id];
__bin._M_first[__thread_id] = __bin._M_first[__thread_id]->_M_next;
__bin._M_first[__thread_id] = __block->_M_next;
__pool._M_adjust_freelist(__bin, __block, __thread_id);
const __pool_base::_Tune& __options = __pool._M_get_options();

38
libstdc++-v3/src/mt_allocator.cc
View File

@ -89,6 +89,7 @@ namespace __gnu_cxx
{
// Round up to power of 2 and figure out which bin to use.
const size_t __which = _M_binmap[__bytes];
_Bin_record& __bin = _M_bin[__which];
const _Tune& __options = _M_get_options();
const size_t __bin_size = ((__options._M_min_bin << __which)
+ __options._M_align);
@ -97,24 +98,23 @@ namespace __gnu_cxx
// Get a new block dynamically, set it up for use.
void* __v = ::operator new(__options._M_chunk_size);
_Block_record* __block = static_cast<_Block_record*>(__v);
--__block_count;
_Block_record* __tmp = __block;
while (__block_count-- > 0)
__bin._M_first[__thread_id] = __block;
while (--__block_count > 0)
{
char* __c = reinterpret_cast<char*>(__tmp) + __bin_size;
__tmp->_M_next = reinterpret_cast<_Block_record*>(__c);
__tmp = __tmp->_M_next;
char* __c = reinterpret_cast<char*>(__block) + __bin_size;
__block->_M_next = reinterpret_cast<_Block_record*>(__c);
__block = __block->_M_next;
}
__tmp->_M_next = NULL;
__block->_M_next = NULL;
// Update _Bin_record fields.
_Bin_record& __bin = _M_bin[__which];
__bin._M_first[__thread_id] = __block->_M_next;
_Block_address* __address = new _Block_address;
__address->_M_initial = __v;
__address->_M_next = __bin._M_address;
__bin._M_address = __address;
__block = __bin._M_first[__thread_id];
__bin._M_first[__thread_id] = __block->_M_next;
// NB: For alignment reasons, we can't use the first _M_align
// bytes, even when sizeof(_Block_record) < _M_align.
return reinterpret_cast<char*>(__block) + __options._M_align;
@ -245,8 +245,7 @@ namespace __gnu_cxx
_Block_record* __first = __tmp;
__remove /= __options._M_freelist_headroom;
const long __removed = __remove;
--__remove;
while (__remove-- > 0)
while (--__remove > 0)
__tmp = __tmp->_M_next;
__bin._M_first[__thread_id] = __tmp->_M_next;
__bin._M_free[__thread_id] -= __removed;
@ -308,11 +307,10 @@ namespace __gnu_cxx
__gthread_mutex_unlock(__bin._M_mutex);
void* __v = ::operator new(__options._M_chunk_size);
__bin._M_first[__thread_id] = static_cast<_Block_record*>(__v);
__block = static_cast<_Block_record*>(__v);
__bin._M_free[__thread_id] = __block_count;
--__block_count;
__block = __bin._M_first[__thread_id];
while (__block_count-- > 0)
__bin._M_first[__thread_id] = __block;
while (--__block_count > 0)
{
char* __c = reinterpret_cast<char*>(__block) + __bin_size;
__block->_M_next = reinterpret_cast<_Block_record*>(__c);
@ -343,9 +341,8 @@ namespace __gnu_cxx
{
__bin._M_free[__thread_id] = __block_count;
__bin._M_free[0] -= __block_count;
--__block_count;
__block = __bin._M_first[0];
while (__block_count-- > 0)
while (--__block_count > 0)
__block = __block->_M_next;
__bin._M_first[0] = __block->_M_next;
__block->_M_next = NULL;
@ -358,8 +355,7 @@ namespace __gnu_cxx
void* __v = ::operator new(__options._M_chunk_size);
__block = static_cast<_Block_record*>(__v);
__bin._M_first[0] = __block;
--__block_count;
while (__block_count-- > 0)
while (--__block_count > 0)
{
char* __c = reinterpret_cast<char*>(__block) + __bin_size;
__block->_M_next = reinterpret_cast<_Block_record*>(__c);
@ -374,7 +370,7 @@ namespace __gnu_cxx
}
__block = __bin._M_first[__thread_id];
__bin._M_first[__thread_id] = __bin._M_first[__thread_id]->_M_next;
__bin._M_first[__thread_id] = __block->_M_next;
if (__gthread_active_p())
{