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#ifndef LF_POOL_ALLOCATOR
#define LF_POOL_ALLOCATOR
#include <memory>
#include <thread>
#include <lfpAlloc/PoolDispatcher.hpp>
namespace lfpAlloc {
template <typename T, std::size_t NumPools = 70>
class lfpAllocator {
public:
using value_type = T;
using pointer = T*;
using const_pointer = const T*;
using reference = T&;
using const_reference = T const&;
template <typename U>
struct rebind {
typedef lfpAllocator<U, NumPools> other;
};
lfpAllocator() {}
template <typename U>
lfpAllocator(lfpAllocator<U, NumPools>&&) noexcept {}
template <typename U>
lfpAllocator(const lfpAllocator<U, NumPools>&) noexcept {}
T* allocate(std::size_t count) {
if (sizeof(T) * count <=
alignof(std::max_align_t) * NumPools - sizeof(void*)) {
return reinterpret_cast<T*>(
dispatcher_.allocate(sizeof(T) * count));
} else {
return new T[count];
}
}
void deallocate(T* p, std::size_t count) noexcept {
if (sizeof(T) * count <=
alignof(std::max_align_t) * NumPools - sizeof(void*)) {
dispatcher_.deallocate(p, sizeof(T) * count);
} else {
delete[] p;
}
}
// Should not be required, but allocator_traits is not complete in
// gcc 4.9.1
template <typename U>
void destroy(U* p) {
p->~U();
}
template <typename U, typename... Args>
void construct(U* p, Args&&... args) {
new (p) U(std::forward<Args>(args)...);
}
template <typename Ty, typename U, std::size_t N, std::size_t M>
friend bool operator==(const lfpAllocator<Ty, N>&,
const lfpAllocator<U, M>&) noexcept;
template <typename U, std::size_t M>
friend class lfpAllocator;
private:
static PoolDispatcher<NumPools> dispatcher_;
};
template <typename T, std::size_t N>
PoolDispatcher<N> lfpAllocator<T, N>::dispatcher_;
template <typename T, typename U, std::size_t N, std::size_t M>
inline bool operator==(const lfpAllocator<T, N>&,
const lfpAllocator<U, M>&) noexcept {
return N == M;
}
template <typename T, typename U, std::size_t N, std::size_t M>
inline bool operator!=(const lfpAllocator<T, N>& left,
const lfpAllocator<U, M>& right) noexcept {
return !(left == right);
}
}
#endif
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