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construct/include/ircd/ios/descriptor.h

105 lines
2.5 KiB
C++

// The Construct
//
// Copyright (C) The Construct Developers, Authors & Contributors
// Copyright (C) 2016-2020 Jason Volk <jason@zemos.net>
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice is present in all copies. The
// full license for this software is available in the LICENSE file.
#pragma once
#define HAVE_IRCD_IOS_DESCRIPTOR_H
namespace ircd::ios
{
struct handler;
struct descriptor;
const string_view &name(const descriptor &);
}
struct ircd::ios::descriptor
:instance_list<descriptor>
{
struct stats;
static uint64_t ids;
static void *default_allocator(handler &, const size_t &);
static void default_deallocator(handler &, void *const &, const size_t &) noexcept;
string_view name;
uint64_t id {++ids};
std::unique_ptr<struct stats> stats;
void *(*allocator)(handler &, const size_t &);
void (*deallocator)(handler &, void *const &, const size_t &);
std::vector<std::array<uint64_t, 2>> history; // epoch, cycles
uint8_t history_pos {0};
bool continuation {false};
descriptor(const string_view &name,
const decltype(allocator) & = default_allocator,
const decltype(deallocator) & = default_deallocator,
const bool &continuation = false) noexcept;
descriptor(descriptor &&) = delete;
descriptor(const descriptor &) = delete;
~descriptor() noexcept;
};
struct ircd::ios::descriptor::stats
{
using value_type = uint64_t;
using item = ircd::stats::item<value_type *>;
value_type value[11];
size_t items;
public:
item queued;
item calls;
item faults;
item allocs;
item alloc_bytes;
item frees;
item free_bytes;
item slice_total;
item slice_last;
item latency_total;
item latency_last;
stats(descriptor &);
stats() = delete;
stats(const stats &) = delete;
stats &operator=(const stats &) = delete;
~stats() noexcept;
};
[[gnu::hot]]
inline void
ircd::ios::descriptor::default_deallocator(handler &handler,
void *const &ptr,
const size_t &size)
noexcept
{
#ifdef __clang__
::operator delete(ptr);
#else
::operator delete(ptr, size);
#endif
}
[[gnu::hot]]
inline void *
ircd::ios::descriptor::default_allocator(handler &handler,
const size_t &size)
{
return ::operator new(size);
}
inline const ircd::string_view &
ircd::ios::name(const descriptor &descriptor)
{
return descriptor.name;
}