lean4-htt/src/util/memory_pool.cpp
2015-09-03 14:18:31 -07:00

53 lines
1.4 KiB
C++

/*
Copyright (c) 2014 Microsoft Corporation. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Author: Leonardo de Moura
*/
#include <vector>
#include "util/thread.h"
#include "util/memory_pool.h"
namespace lean {
memory_pool::~memory_pool() {
while (m_free_list != nullptr) {
void * r = m_free_list;
m_free_list = *(reinterpret_cast<void **>(r));
free(r);
}
}
void * memory_pool::allocate() {
if (m_free_list != nullptr) {
void * r = m_free_list;
m_free_list = *(reinterpret_cast<void **>(r));
return r;
} else {
return malloc(m_size);
}
}
typedef std::vector<memory_pool*> memory_pools;
LEAN_THREAD_PTR(memory_pools, g_thread_pools);
static void thread_finalize_memory_pool(void * p) {
std::vector<memory_pool*> * thread_pools = reinterpret_cast<std::vector<memory_pool*>*>(p);
unsigned i = thread_pools->size();
while (i > 0) {
--i;
delete (*thread_pools)[i];
}
delete thread_pools;
g_thread_pools = nullptr;
}
memory_pool * allocate_thread_memory_pool(unsigned sz) {
if (!g_thread_pools) {
g_thread_pools = new std::vector<memory_pool*>();
register_post_thread_finalizer(thread_finalize_memory_pool, g_thread_pools);
}
memory_pool * r = new memory_pool(sz);
g_thread_pools->push_back(r);
return r;
}
}