spilling start

progress
Avril 4 years ago
parent 4a7d93f24b
commit 7d34ed2496
Signed by: flanchan
GPG Key ID: 284488987C31F630

@ -7,6 +7,18 @@
#include <panic.h>
template<typename T>
struct i_back_inserter
{
virtual void push_back(T&& value) =0;
virtual void pop_back() =0;
virtual const T& back() const =0;
virtual T& back() =0;
virtual const std::size_t size() const =0;
virtual inline ~i_back_inserter() =default;
};
struct file_back_buffer
{
const static constexpr std::size_t DEFAULT_CAP = 1024;
@ -43,31 +55,31 @@ namespace {
}
template<typename T>
struct file_vector
struct file_vector : public i_back_inserter<T>
{
inline file_vector() : file_vector(file_back_buffer::DEFAULT_CAP){}
inline file_vector(std::size_t cap) : inserter(file_back_buffer(cap)), len(0), current_back(std::vector<unsigned char>(sizeof(T))) {current_back.resize(sizeof(T));}
inline file_vector(const file_vector<T>& c) = delete;
inline file_vector(file_vector<T>&& m) : inserter(std::move(m.inserter)), len(m.len), current_back(std::move(m.current_back)){}
inline void push_back(T&& value)
inline void push_back(T&& value) override
{
inserter.push_buf((file_back_buffer::byte*)&value, sizeof(T));
len += 1;
}
inline T& back()
inline T& back() override
{
if(!len) panic("back() called on empty file_vector");
if(!inserter.back(&current_back[0], sizeof(T))) panic("back() failed");
return *_die_if_null((T*)&current_back[0], "file_vector::back() returned null pointer");
}
inline const T& back() const
inline const T& back() const override
{
if(!len) panic("back() called on empty file_vector");
if(!inserter.back(&current_back[0], sizeof(T))) panic("back() failed");
return *_die_if_null((const T*)&current_back[0], "file_vector::back() (const) returned null pointer");
}
inline void pop_back()
inline void pop_back() override
{
if(!len) return;
@ -75,9 +87,52 @@ struct file_vector
len-=1;
}
inline const std::size_t size() const { return len; }
inline const std::size_t size() const override { return len; }
private:
file_back_buffer inserter;
std::size_t len;
mutable std::vector<unsigned char> current_back; // what an awful hack...
};
#define DEFAULT_SPILL_AT (1024 * 1024)
template<typename T, std::size_t Spill = DEFAULT_SPILL_AT >
requires (Spill > 0)
struct fixed_spill_vector : public i_back_inserter<T>
{
constexpr const static std::size_t SPILL_AT = Spill;
inline fixed_spill_vector(){}
inline fixed_spill_vector(const fixed_spill_vector<T>& c) = delete;
inline fixed_spill_vector(fixed_spill_vector<T>&& m)
: mem(std::move(m.mem)),
mem_fill_ptr(m.mem_fill_ptr),
fil(std::move(m.fil))
{}
//TODO: Inserters/getters
inline void push_back(T&& value) override
{
}
inline void pop_back() override
{
}
inline const T& back() const override
{
}
inline T& back() override
{
}
inline const std::size_t size() const override
{
}
private:
std::array<T, Spill> mem;
std::size_t mem_fill_ptr;
file_vector<T> fil;
};

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