void * SmallObjAllocator::Allocate( std::size_t numBytes, bool doThrow )
{
if ( numBytes > GetMaxObjectSize() )
return DefaultAllocator( numBytes, doThrow );
assert( NULL != pool_ );
if ( 0 == numBytes ) numBytes = 1;
const std::size_t index = GetOffset( numBytes, GetAlignment() ) - 1;
const std::size_t allocCount = GetOffset( GetMaxObjectSize(), GetAlignment() );
(void) allocCount;
assert( index < allocCount );
FixedAllocator & allocator = pool_[ index ];
assert( allocator.BlockSize() >= numBytes );
assert( allocator.BlockSize() < numBytes + GetAlignment() );
void * place = allocator.Allocate();
if ( ( NULL == place ) && TrimExcessMemory() )
place = allocator.Allocate();
if ( ( NULL == place ) && doThrow )
{
#ifdef _MSC_VER
throw std::bad_alloc( "could not allocate small object" );
#else
// GCC did not like a literal string passed to std::bad_alloc.
// so just throw the default-constructed exception.
throw std::bad_alloc();
#endif
}
return place;
}
void* SymbolTable::operator new(long sz)
{
return DefaultAllocator()->alloc(sz);
}