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#ifndef __TRACYSLAB_HPP__
#define __TRACYSLAB_HPP__
#include <assert.h>
#include <vector>
#include "TracyMemory.hpp"
namespace tracy
{
template<size_t BlockSize>
class Slab
{
public:
Slab()
: m_ptr( new char[BlockSize] )
, m_offset( 0 )
, m_buffer( { m_ptr } )
, m_usage( BlockSize )
{
memUsage.fetch_add( BlockSize, std::memory_order_relaxed );
}
~Slab()
{
memUsage.fetch_sub( m_usage, std::memory_order_relaxed );
for( auto& v : m_buffer )
{
delete[] v;
}
}
tracy_force_inline void* AllocRaw( size_t size )
{
assert( size <= BlockSize );
if( m_offset + size > BlockSize )
{
DoAlloc();
}
void* ret = m_ptr + m_offset;
m_offset += size;
return ret;
}
template<typename T>
T* AllocInit()
{
const auto size = sizeof( T );
assert( size <= BlockSize );
if( m_offset + size > BlockSize )
{
DoAlloc();
}
void* ret = m_ptr + m_offset;
new( ret ) T;
m_offset += size;
return (T*)ret;
}
template<typename T>
tracy_force_inline T* Alloc()
{
return (T*)AllocRaw( sizeof( T ) );
}
template<typename T>
tracy_force_inline T* Alloc( size_t size )
{
return (T*)AllocRaw( sizeof( T ) * size );
}
tracy_force_inline void Unalloc( size_t size )
{
assert( size <= m_offset );
m_offset -= size;
}
tracy_force_inline void* AllocBig( size_t size )
{
if( m_offset + size <= BlockSize )
{
void* ret = m_ptr + m_offset;
m_offset += size;
return ret;
}
else if( size <= BlockSize && BlockSize - m_offset <= 1024 )
{
DoAlloc();
void* ret = m_ptr + m_offset;
m_offset += size;
return ret;
}
else
{
memUsage.fetch_add( size );
m_usage += size;
auto ret = new char[size];
m_buffer.emplace_back( ret );
return ret;
}
}
void Reset()
{
if( m_buffer.size() > 1 )
{
memUsage.fetch_sub( m_usage - BlockSize, std::memory_order_relaxed );
m_usage = BlockSize;
for( int i=1; i<m_buffer.size(); i++ )
{
delete[] m_buffer[i];
}
m_ptr = m_buffer[0];
m_buffer.clear();
m_buffer.emplace_back( m_ptr );
}
m_offset = 0;
}
Slab( const Slab& ) = delete;
Slab( Slab&& ) = delete;
Slab& operator=( const Slab& ) = delete;
Slab& operator=( Slab&& ) = delete;
private:
void DoAlloc()
{
m_ptr = new char[BlockSize];
m_offset = 0;
m_buffer.emplace_back( m_ptr );
memUsage.fetch_add( BlockSize, std::memory_order_relaxed );
m_usage += BlockSize;
}
char* m_ptr;
uint32_t m_offset;
std::vector<char*> m_buffer;
size_t m_usage;
};
}
#endif
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