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Slight optimization of wait state management.

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This commit is contained in:
Andrey Semashev
2020-06-23 22:48:07 +00:00
parent a247342a13
commit 705d9b8800
1 changed files with 11 additions and 8 deletions
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19
src/lock_pool.cpp
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@@ -1061,19 +1061,20 @@ inline wait_state* wait_state_list::find_or_create(const volatile void* addr) BO
}
}
BOOST_ASSERT(m_header->size < m_header->capacity);
const std::size_t index = m_header->size;
BOOST_ASSERT(index < m_header->capacity);
wait_state** pw = get_wait_states() + m_header->size;
wait_state** pw = get_wait_states() + index;
wait_state* w = *pw;
if (BOOST_UNLIKELY(w == NULL))
{
w = new (std::nothrow) wait_state(m_header->size);
w = new (std::nothrow) wait_state(index);
if (BOOST_UNLIKELY(w == NULL))
return NULL;
*pw = w;
}
get_atomic_pointers()[m_header->size] = addr;
get_atomic_pointers()[index] = addr;
++m_header->size;
@@ -1089,7 +1090,9 @@ inline void wait_state_list::erase(wait_state* w) BOOST_NOEXCEPT
wait_state** pw = get_wait_states();
std::size_t index = w->m_index;
BOOST_ASSERT(index < m_header->size);
BOOST_ASSERT(pw[index] == w);
std::size_t last_index = m_header->size - 1u;
@@ -1098,12 +1101,12 @@ inline void wait_state_list::erase(wait_state* w) BOOST_NOEXCEPT
pa[index] = pa[last_index];
pa[last_index] = NULL;
wait_state* w = pw[index];
pw[index] = pw[last_index];
wait_state* last_w = pw[last_index];
pw[index] = last_w;
pw[last_index] = w;
pw[index]->m_index = index;
pw[last_index]->m_index = last_index;
last_w->m_index = index;
w->m_index = last_index;
}
else
{