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lang/c/msgpack: optimize zone::alloc()

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git-svn-id: file:///Users/frsyuki/project/msgpack-git/svn/x@61 5a5092ae-2292-43ba-b2d5-dcab9c1a2731
This commit is contained in:
frsyuki 2009-02-15 09:09:57 +00:00
parent a721837ed0
commit 4d13f614b6
4 changed files with 86 additions and 73 deletions
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32
cpp/zone.cpp
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@ -20,34 +20,33 @@
namespace msgpack {
void* zone::alloc()
// FIXME custom allocator?
void zone::expand_chunk()
{
if(m_pool.size()*ZONE_CHUNK_SIZE <= m_used) {
cell_t* chunk = (cell_t*)malloc(sizeof(cell_t)*ZONE_CHUNK_SIZE);
if(!chunk) { throw std::bad_alloc(); }
try {
m_pool.push_back(chunk);
} catch (...) {
free(chunk);
throw;
}
cell_t* chunk = (cell_t*)malloc(sizeof(cell_t)*ZONE_CHUNK_SIZE);
if(!chunk) { throw std::bad_alloc(); }
try {
m_pool.push_back(chunk);
} catch (...) {
free(chunk);
throw;
}
void* data = m_pool[m_used/ZONE_CHUNK_SIZE][m_used%ZONE_CHUNK_SIZE].data;
++m_used;
return data;
}
void zone::clear()
{
if(!m_pool.empty()) {
for(size_t b=0; b < m_used/ZONE_CHUNK_SIZE; ++b) {
size_t base_size = m_used / ZONE_CHUNK_SIZE;
size_t extend_size = m_used % ZONE_CHUNK_SIZE;
for(size_t b=0; b < base_size; ++b) {
cell_t* c(m_pool[b]);
for(size_t e=0; e < ZONE_CHUNK_SIZE; ++e) {
reinterpret_cast<object_class*>(c[e].data)->~object_class();
}
}
cell_t* c(m_pool.back());
for(size_t e=0; e < m_used%ZONE_CHUNK_SIZE; ++e) {
for(size_t e=0; e < extend_size; ++e) {
reinterpret_cast<object_class*>(c[e].data)->~object_class();
}
@ -60,7 +59,8 @@ void zone::clear()
}
m_used = 0;
for(user_finalizer_t::reverse_iterator it(m_user_finalizer.rbegin()), it_end(m_user_finalizer.rend());
for(user_finalizer_t::reverse_iterator it(m_user_finalizer.rbegin()),
it_end(m_user_finalizer.rend());
it != it_end;
++it) {
it->call();