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Add BOOST_LIKELY hints

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Ion Gaztañaga
2018-09-26 01:11:34 +02:00
parent e787c4a24d
commit 92e5ffb151
1 changed files with 12 additions and 7 deletions
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19
include/boost/container/detail/copy_move_algo.hpp
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@@ -174,9 +174,13 @@ template
inline F memmove(I f, I l, F r) BOOST_NOEXCEPT_OR_NOTHROW inline F memmove(I f, I l, F r) BOOST_NOEXCEPT_OR_NOTHROW
{ {
typedef typename boost::container::iterator_traits<I>::value_type value_type; typedef typename boost::container::iterator_traits<I>::value_type value_type;
typename boost::container::iterator_traits<I>::difference_type n = boost::container::iterator_distance(f, l); value_type *const dest_raw = boost::movelib::iterator_to_raw_pointer(r);
if(n){ const value_type *const beg_raw = boost::movelib::iterator_to_raw_pointer(f);
std::memmove(boost::movelib::iterator_to_raw_pointer(r), boost::movelib::iterator_to_raw_pointer(f), sizeof(value_type)*n); const value_type *const end_raw = boost::movelib::iterator_to_raw_pointer(l);
if(BOOST_LIKELY(beg_raw != end_raw)){
BOOST_ASSERT(beg_raw != 0);
const typename boost::container::iterator_traits<I>::difference_type n = end_raw - beg_raw;
std::memmove(dest_raw, beg_raw, sizeof(value_type)*n);
boost::container::iterator_advance(r, n); boost::container::iterator_advance(r, n);
} }
return r; return r;
@@ -189,7 +193,7 @@ template
F memmove_n(I f, U n, F r) BOOST_NOEXCEPT_OR_NOTHROW F memmove_n(I f, U n, F r) BOOST_NOEXCEPT_OR_NOTHROW
{ {
typedef typename boost::container::iterator_traits<I>::value_type value_type; typedef typename boost::container::iterator_traits<I>::value_type value_type;
if(n){ if(BOOST_LIKELY(n)){
std::memmove(boost::movelib::iterator_to_raw_pointer(r), boost::movelib::iterator_to_raw_pointer(f), sizeof(value_type)*n); std::memmove(boost::movelib::iterator_to_raw_pointer(r), boost::movelib::iterator_to_raw_pointer(f), sizeof(value_type)*n);
boost::container::iterator_advance(r, n); boost::container::iterator_advance(r, n);
} }
@@ -203,7 +207,7 @@ template
typename F> // F models ForwardIterator typename F> // F models ForwardIterator
I memmove_n_source(I f, U n, F r) BOOST_NOEXCEPT_OR_NOTHROW I memmove_n_source(I f, U n, F r) BOOST_NOEXCEPT_OR_NOTHROW
{ {
if(n){ if(BOOST_LIKELY(n)){
typedef typename boost::container::iterator_traits<I>::value_type value_type; typedef typename boost::container::iterator_traits<I>::value_type value_type;
std::memmove(boost::movelib::iterator_to_raw_pointer(r), boost::movelib::iterator_to_raw_pointer(f), sizeof(value_type)*n); std::memmove(boost::movelib::iterator_to_raw_pointer(r), boost::movelib::iterator_to_raw_pointer(f), sizeof(value_type)*n);
boost::container::iterator_advance(f, n); boost::container::iterator_advance(f, n);
@@ -218,7 +222,7 @@ template
I memmove_n_source_dest(I f, U n, F &r) BOOST_NOEXCEPT_OR_NOTHROW I memmove_n_source_dest(I f, U n, F &r) BOOST_NOEXCEPT_OR_NOTHROW
{ {
typedef typename boost::container::iterator_traits<I>::value_type value_type; typedef typename boost::container::iterator_traits<I>::value_type value_type;
if(n){ if(BOOST_LIKELY(n)){
std::memmove(boost::movelib::iterator_to_raw_pointer(r), boost::movelib::iterator_to_raw_pointer(f), sizeof(value_type)*n); std::memmove(boost::movelib::iterator_to_raw_pointer(r), boost::movelib::iterator_to_raw_pointer(f), sizeof(value_type)*n);
boost::container::iterator_advance(f, n); boost::container::iterator_advance(f, n);
boost::container::iterator_advance(r, n); boost::container::iterator_advance(r, n);
@@ -735,7 +739,8 @@ typename F> // F models ForwardIterator
inline typename dtl::disable_if_memtransfer_copy_assignable<I, F, F>::type inline typename dtl::disable_if_memtransfer_copy_assignable<I, F, F>::type
copy_n(I f, U n, F r) copy_n(I f, U n, F r)
{ {
while (n--) { while (n) {
--n;
*r = *f; *r = *f;
++f; ++r; ++f; ++r;
} }