mirror of
https://github.com/matrix-construct/construct
synced 2024-11-15 22:41:12 +01:00
100 lines
2.8 KiB
C++
100 lines
2.8 KiB
C++
// Matrix Construct
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//
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// Copyright (C) Matrix Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2019 Jason Volk <jason@zemos.net>
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice is present in all copies. The
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// full license for this software is available in the LICENSE file.
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#pragma once
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#define HAVE_IRCD_MODS_LDSO_H
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// This is a platform dependent interface. While this header and these decls
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// are unconditionally included in the standard include stack, the defs
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// behind them may not be compiled and linked on all platforms.
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// Forward declarations for <link.h> because it is not included here.
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extern "C"
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{
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struct link_map;
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}
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/// Platform-dependent interface on ELF+ld.so supporting compilations.
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namespace ircd::mods::ldso
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{
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struct info;
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struct exceptions;
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IRCD_EXCEPTION(mods::error, error)
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IRCD_EXCEPTION(error, not_found);
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using link_closure = std::function<bool (struct link_map &)>;
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using string_closure = std::function<bool (const string_view &)>;
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using semantic_version = std::array<long, 3>;
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// Util
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string_view fullname(const struct link_map &); // /lib/x86_64-linux-gnu/libz.so.1
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string_view soname(const string_view &fullname); // libz.so.1
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string_view soname(const struct link_map &); // libz.so.1
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string_view name(const string_view &soname); // z
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string_view name(const struct link_map &); // z
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semantic_version version(const string_view &soname); // 1.0.0
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semantic_version version(const struct link_map &map); // 1.0.0
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const void *addr(const struct link_map &); // 0x7ffff...
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// Iteration
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bool for_each(const link_closure &);
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bool has_fullname(const string_view &path);
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bool has_soname(const string_view &name);
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bool has(const string_view &name);
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size_t count();
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// Get link
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struct link_map *get(std::nothrow_t, const string_view &name);
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struct link_map &get(const string_view &name);
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// Query link
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const char *strtab(const struct link_map &);
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string_view string(const struct link_map &, const size_t &idx);
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bool for_each_needed(const struct link_map &, const string_closure &);
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// dlfcn suite
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bool loaded(const string_view &name);
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}
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struct ircd::mods::ldso::info
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{
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string_view fname;
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const void *fbase {nullptr};
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string_view sname;
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const void *saddr {nullptr};
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info(const void *const &addr);
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info() = default;
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};
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struct ircd::mods::ldso::exceptions
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{
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static bool enable;
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const bool theirs;
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public:
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exceptions(const bool enable = true);
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~exceptions() noexcept;
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};
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inline
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ircd::mods::ldso::exceptions::exceptions(const bool ours)
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:theirs{enable}
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{
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enable = ours;
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}
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inline
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ircd::mods::ldso::exceptions::~exceptions()
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noexcept
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{
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enable = theirs;
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}
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