diff options
| author | paolo <paolo@138bc75d-0d04-0410-961f-82ee72b054a4> | 2006-09-25 10:05:27 +0000 |
|---|---|---|
| committer | paolo <paolo@138bc75d-0d04-0410-961f-82ee72b054a4> | 2006-09-25 10:05:27 +0000 |
| commit | 01c9f0815d1a2b4dde901c7a5ce5ded4f0b89462 (patch) | |
| tree | 3396c8e8917b221c952e56902ba7ded53da1a892 | |
| parent | d030ec838b0c0ffa7c84bbffb06ff200c83048a3 (diff) | |
2006-09-25 Paolo Carlini <pcarlini@suse.de>
PR libstdc++/29179
* include/ext/mt_allocator.h (__pool_base): Adjust/extend
documentation in comments.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@117193 138bc75d-0d04-0410-961f-82ee72b054a4
| -rw-r--r-- | libstdc++-v3/ChangeLog | 6 | ||||
| -rw-r--r-- | libstdc++-v3/include/ext/mt_allocator.h | 16 |
2 files changed, 16 insertions, 6 deletions
diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog index 0c09db148ce..410f39f7f29 100644 --- a/libstdc++-v3/ChangeLog +++ b/libstdc++-v3/ChangeLog @@ -1,3 +1,9 @@ +2006-09-25 Paolo Carlini <pcarlini@suse.de> + + PR libstdc++/29179 + * include/ext/mt_allocator.h (__pool_base): Adjust/extend + documentation in comments. + 2006-09-24 Paolo Carlini <pcarlini@suse.de> * include/tr1/boost_shared_ptr.h (shared_ptr<>::shared_ptr(const diff --git a/libstdc++-v3/include/ext/mt_allocator.h b/libstdc++-v3/include/ext/mt_allocator.h index 4dcd4373e4e..bc2d61f6eec 100644 --- a/libstdc++-v3/include/ext/mt_allocator.h +++ b/libstdc++-v3/include/ext/mt_allocator.h @@ -50,7 +50,7 @@ _GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx) struct __pool_base { // Using short int as type for the binmap implies we are never - // caching blocks larger than 65535 with this allocator. + // caching blocks larger than 32768 with this allocator. typedef unsigned short int _Binmap_type; // Variables used to configure the behavior of the allocator, @@ -73,19 +73,23 @@ _GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx) // Allocation requests (after round-up to power of 2) below // this value will be handled by the allocator. A raw new/ // call will be used for requests larger than this value. + // NB: Must be much smaller than _M_chunk_size and in any + // case <= 32768. size_t _M_max_bytes; - + // Size in bytes of the smallest bin. - // NB: Must be a power of 2 and >= _M_align. + // NB: Must be a power of 2 and >= _M_align (and of course + // much smaller than _M_max_bytes). size_t _M_min_bin; - + // In order to avoid fragmenting and minimize the number of // new() calls we always request new memory using this // value. Based on previous discussions on the libstdc++ // mailing list we have choosen the value below. // See http://gcc.gnu.org/ml/libstdc++/2001-07/msg00077.html + // NB: At least one order of magnitude > _M_max_bytes. size_t _M_chunk_size; - + // The maximum number of supported threads. For // single-threaded operation, use one. Maximum values will // vary depending on details of the underlying system. (For @@ -93,7 +97,7 @@ _GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx) // /proc/sys/kernel/threads-max, while Linux 2.6.6 reports // 65534) size_t _M_max_threads; - + // Each time a deallocation occurs in a threaded application // we make sure that there are no more than // _M_freelist_headroom % of used memory on the freelist. If |