mirror of
https://github.com/matrix-construct/construct
synced 2024-11-16 23:10:54 +01:00
62 lines
1.8 KiB
C++
62 lines
1.8 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) 2016-2018 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_FPE_H
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namespace ircd::fpe
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{
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struct errors_handle;
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struct errors_throw;
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string_view reflect_sicode(const int &);
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string_view reflect(const ushort &flag);
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string_view reflect(const mutable_buffer &, const ushort &flags);
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void throw_errors(const ushort &flags);
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}
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/// Perform a single floating point operation at a time within the scope
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/// of fpe::errors_handle. After each operation check the floating point
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/// unit for an error status flag and throw a C++ exception.
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struct ircd::fpe::errors_handle
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{
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fexcept_t theirs;
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public:
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ushort pending() const;
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void throw_pending() const;
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void clear_pending();
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errors_handle();
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~errors_handle() noexcept(false);
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};
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// We don't include <signal.h> in IRCd's standard include list. Instead that
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// is conditionally included in the appropriate .cc file. All we require here
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// is a forward declaration.
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extern "C"
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{
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struct sigaction;
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};
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/// Experimental floating-point error handling strategy which throws
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/// a C++ exception directly from the instruction which faulted the FPU.
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/// The stack will unwind directly from that point in the execution and
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/// control will be transferred to the appropriate catch block.
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struct ircd::fpe::errors_throw
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{
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custom_ptr<struct sigaction> their_sa;
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long their_fenabled;
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fexcept_t their_fe;
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public:
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errors_throw();
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~errors_throw() noexcept;
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};
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