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#ifndef __OTSERV_ALLOCATOR_H
#define __OTSERV_ALLOCATOR_H
#ifdef __OTSERV_ALLOCATOR__
#include <memory>
#include <limits>
#include <cstdlib>
#include <map>
#include <fstream>
#include <ctime>
#include <boost/pool/pool.hpp>
template<typename T>
class dummyallocator
{
public:
typedef std::size_t size_type;
typedef std::ptrdiff_t difference_type;
typedef T* pointer;
typedef const T* const_pointer;
typedef T& reference;
typedef const T& const_reference;
typedef T value_type;
template <class U>
struct rebind
{
typedef dummyallocator<U> other;
};
dummyallocator( ) throw( )
{}
dummyallocator(const dummyallocator&) throw( )
{}
template <class U>
dummyallocator(const dummyallocator<U>&) throw( )
{}
~dummyallocator( ) throw( )
{}
pointer address(reference x) const
{
return &x;
}
const_pointer address(const_reference x) const
{
return &x;
}
pointer allocate(size_type n, void* hint = 0)
{
return static_cast<T*>(std::malloc(n * sizeof(T)) );
}
void deallocate(pointer p, size_type n)
{
std::free(static_cast<void*>(p));
}
size_type max_size( ) const throw( )
{
return std::numeric_limits<size_type>::max() / sizeof(T);
}
void construct(pointer p, const T& val)
{
new(static_cast<void*>(p)) T(val);
}
void destroy(pointer p)
{
p->~T( );
}
};
void* operator new(size_t bytes, int dummy);
void* operator new(size_t bytes);
void* operator new[](size_t bytes);
void operator delete(void *p);
void operator delete[](void* p);
#ifdef _MSC_VER
void operator delete(void* p, int dummy);
void operator delete[](void* p, int dummy);
#endif
#ifdef __OTSERV_ALLOCATOR_STATS__
OTSYS_THREAD_RETURN allocatorStatsThread(void *a);
#endif
struct poolTag
{
size_t poolbytes;
};
class PoolManager
{
public:
static PoolManager& getInstance()
{
static PoolManager instance;
return instance;
}
void* allocate(size_t size)
{
Pools::iterator it;
OTSYS_THREAD_LOCK(poolLock, NULL);
for(it = pools.begin(); it != pools.end(); ++it)
{
if(it->first >= size + sizeof(poolTag))
{
//poolTag* tag = reinterpret_cast<poolTag*>(it->second->ordered_malloc());
poolTag* tag = reinterpret_cast<poolTag*>(it->second->malloc());
tag->poolbytes = it->first;
#ifdef __OTSERV_ALLOCATOR_STATS__
poolsStats[it->first]->allocations++;
poolsStats[it->first]->unused+= it->first - (size + sizeof(poolTag));
#endif
OTSYS_THREAD_UNLOCK(poolLock, NULL);
return tag + 1;
}
}
poolTag* tag = reinterpret_cast<poolTag*>(std::malloc(size + sizeof(poolTag)));
#ifdef __OTSERV_ALLOCATOR_STATS__
poolsStats[0]->allocations++;
poolsStats[0]->unused += size;
#endif
tag->poolbytes = 0;
OTSYS_THREAD_UNLOCK(poolLock, NULL);
return tag + 1;
}
void deallocate(void* deletable)
{
if(deletable == NULL)
return;
poolTag* const tag = reinterpret_cast<poolTag*>(deletable) - 1U;
OTSYS_THREAD_LOCK(poolLock, NULL);
if(tag->poolbytes)
{
Pools::iterator it;
it = pools.find(tag->poolbytes);
//it->second->ordered_free(tag);
it->second->free(tag);
#ifdef __OTSERV_ALLOCATOR_STATS__
poolsStats[it->first]->deallocations++;
#endif
}
else
{
std::free(tag);
#ifdef __OTSERV_ALLOCATOR_STATS__
poolsStats[0]->deallocations++;
#endif
}
OTSYS_THREAD_UNLOCK(poolLock, NULL);
}
/*
void releaseMemory(){
Pools::iterator it;
for(it = pools.begin(); it != pools.end(); ++it) {
it->second->release_memory();
}
}
*/
#ifdef __OTSERV_ALLOCATOR_STATS__
void dumpStats()
{
time_t rawtime;
time(&rawtime);
std::ofstream output("mem_dump.txt",std::ios_base::app);
output << "Otserv Allocator Stats: " << std::ctime(&rawtime);
PoolsStats::iterator it;
for(it = poolsStats.begin(); it != poolsStats.end(); ++it)
{
output << (int)(it->first) << " alloc: " << (int)(it->second->allocations) <<
" dealloc: " << (int)(it->second->deallocations) <<
" unused: " << (int)(it->second->unused);
if(it->second->allocations != 0 && it->first != 0)
{
output << " avg: " << (int)((it->first) - (it->second->unused)/(it->second->allocations)) <<
" %unused: " << (int)((it->second->unused)*100/(it->second->allocations)/(it->first));
}
output << " N: " << ((int)(it->second->allocations) - (int)(it->second->deallocations)) <<
std::endl;
}
output << std::endl;
output.close();
}
#endif
~PoolManager()
{
Pools::iterator it = pools.begin();
while(it != pools.end())
{
std::free(it->second);
pools.erase(it++);
}
#ifdef __OTSERV_ALLOCATOR_STATS__
PoolsStats::iterator it2;
for(it2 = poolsStats.begin(); it2 != poolsStats.end(); ++it2)
{
std::free(it2->second);
poolsStats.erase(it2++);
}
#endif
}
private:
void addPool(size_t size, size_t next_size)
{
pools[size] = new(0) boost::pool<boost::default_user_allocator_malloc_free>(size, next_size);
#ifdef __OTSERV_ALLOCATOR_STATS__
t_PoolStats * tmp = new(0) t_PoolStats;
tmp->unused = 0;
tmp->allocations = 0;
tmp->deallocations = 0;
poolsStats[size] = tmp;
#endif
}
PoolManager()
{
OTSYS_THREAD_LOCKVARINIT(poolLock);
addPool(32, 16384);
addPool(64, 16384);
addPool(128, 4096);
addPool(256, 256);
addPool(512, 256);
addPool(768, 256);
addPool(2048, 128);
addPool(4096, 128);
addPool(8192, 128);
addPool(18432, 128);
#ifdef __OTSERV_ALLOCATOR_STATS__
t_PoolStats * tmp = new(0) t_PoolStats;
tmp->unused = 0;
tmp->allocations = 0;
tmp->deallocations = 0;
poolsStats[0] = tmp;
#endif
}
PoolManager(const PoolManager&);
const PoolManager& operator=(const PoolManager&);
typedef std::map<size_t, boost::pool<boost::default_user_allocator_malloc_free >*, std::less<size_t >,
dummyallocator<std::pair<const size_t, boost::pool<boost::default_user_allocator_malloc_free>* > > > Pools;
Pools pools;
#ifdef __OTSERV_ALLOCATOR_STATS__
struct t_PoolStats
{
int allocations;
int deallocations;
int unused;
};
typedef std::map<size_t, t_PoolStats*, std::less<size_t >,
dummyallocator<std::pair<const size_t, t_PoolStats* > > > PoolsStats;
PoolsStats poolsStats;
#endif
OTSYS_THREAD_LOCKVAR poolLock;
};
#endif
#endif
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