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construct/include/ircd/info.h
Jason Volk 398fb026b0 ircd::info: Additional execution specific; reorg hardware/system related.
ircd::info: Sample hardware cache characteristics.
2020-04-28 20:18:48 -07:00

198 lines
5.7 KiB
C++

// Matrix Construct
//
// Copyright (C) Matrix Construct Developers, Authors & Contributors
// Copyright (C) 2016-2018 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_INFO_H
// legacy
extern "C" const char *const ircd_name;
extern "C" const char *const ircd_version;
/// Information & metadata about the library.
namespace ircd::info
{
struct line;
struct versions;
// Util
void dump();
// Primary information
extern const string_view name;
extern const string_view version;
extern const string_view user_agent;
extern const string_view server_agent;
// Extended information
extern const string_view credits[];
// Build information
extern const string_view tag;
extern const string_view branch;
extern const string_view commit;
extern const time_t configured_time;
extern const string_view configured;
extern const string_view compiled;
// Toolchain and library information
extern const versions gnuc_version;
extern const versions clang_version;
extern const versions glibc_version_api;
extern const versions glibc_version_abi;
extern const versions glibcxx_version_api;
extern const versions sd6_version;
// System configuration / information
extern const size_t page_size;
extern const size_t iov_max;
extern const size_t aio_max;
extern const size_t aio_reqprio_max;
extern const size_t clk_tck;
extern const size_t total_ram;
extern const size_t total_swap;
// Host & third-party information
#ifdef HAVE_SYS_UTSNAME_H
extern const ::utsname utsname;
#endif
// Kernel information
extern const string_view kernel_name;
extern const string_view kernel_release;
extern const versions kernel_version;
extern const intptr_t vsyscall_p;
extern const intptr_t vdso_p;
// Execution information
extern const time_t startup_time;
extern const string_view startup;
extern const uint64_t random;
extern const uint uid, euid;
extern const uint gid, egid;
extern const bool secure;
}
namespace ircd::info::hardware
{
extern const size_t max_align;
extern const size_t hardware_concurrency;
extern const size_t destructive_interference;
extern const size_t constructive_interference;
extern const size_t inst_blksz, data_blksz, uni_blksz;
extern const size_t l1i, l1i_line, l1i_tag, l1i_assoc;
extern const size_t l1i_tlb, l1i_tlb_assoc;
extern const size_t l1d, l1d_line, l1d_tag, l1d_assoc;
extern const size_t l1d_tlb, l1d_tlb_assoc;
extern const size_t l2, l2_line, l2_tag, l2_assoc;
extern const size_t l2_itlb, l2_itlb_assoc;
extern const size_t l2_dtlb, l2_dtlb_assoc;
extern const size_t l3, l3_line, l3_tag, l3_assoc;
extern const size_t page_size;
extern const ulonglong cap[2];
}
namespace ircd::info::hardware::x86
{
uint8_t llc_assoc(const uint8_t) noexcept;
uint128_t cpuid(const uint &leaf, const uint &subleaf) noexcept;
extern const uint128_t manufact;
extern const uint128_t features;
extern const uint128_t extended_features;
extern const uint128_t _manufact;
extern const uint128_t _features;
extern const uint128_t _l1cache;
extern const uint128_t _llcache;
extern const uint128_t _apmi;
extern const uint128_t _lwp;
extern const string_view vendor;
extern const bool mmx, sse, sse2;
extern const bool sse3, ssse3, sse4_1, sse4_2;
extern const bool avx, avx2;
};
/// Instances of `versions` create a dynamic version registry identifying
/// third-party dependencies throughout the project and its loaded modules.
///
/// Create a static instance of this class in a definition file or module
/// which has access to the version information of the dependency. Often there
/// can be two version identifiers for a dependency, one for headers and the
/// other for dynamically loaded shared object. In that case, create two
/// instances of this class with the same name.
///
struct ircd::info::versions
:instance_list<versions>
{
/// Our own name for the dependency.
string_view name;
/// Set the type to either API or ABI to indicate where this version
/// information has been sourced. Defaults to API.
enum type {API, ABI} type {API};
/// If the version number is a single (likely monotonic) integer.
long monotonic {0};
/// Alternative semantic version number.
std::array<long, 3> semantic {0};
/// Version string buffer. Copy any provided version string here.
char string[128] {0};
/// Convenience access to read the semantic version numbers.
auto &operator[](const int &idx) const;
/// Convenience access to read the monotonic integer; note that if zero
/// the semantic major number is read instead.
explicit operator const long &() const;
/// Convenience access to read the string
explicit operator string_view() const;
versions(const string_view &name,
const enum type &type = type::API,
const long &monotonic = 0,
const std::array<long, 3> &semantic = {0L},
const string_view &string = {});
versions(const string_view &name,
const enum type &type,
const long &monotonic,
const std::array<long, 3> &semantic,
const std::function<void (versions &, const mutable_buffer &)> &generator);
versions() = default;
versions(versions &&) = delete;
versions(const versions &) = delete;
~versions() noexcept;
};
inline ircd::info::versions::operator
const long &()
const
{
return monotonic?: semantic[0];
}
inline ircd::info::versions::operator
ircd::string_view()
const
{
return string;
}
inline auto &
ircd::info::versions::operator[](const int &idx)
const
{
return semantic.at(idx);
}