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construct/include/ircd/panic.h

62 lines
3.3 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_PANIC_H
namespace ircd
{
void panicking(const std::exception &) noexcept;
void panicking(const std::exception_ptr &) noexcept;
void _aborting_() noexcept;
}
/// Creates a panic-type exception.
///
/// Throwable which will terminate on construction in debug mode but throw
/// normally in release mode. Ideally this should never be thrown in release
/// mode because the termination in debug means a test can never pass and
/// the triggering callsite should be eliminated. Nevertheless it throws
/// normally in release mode for recovering at an exception handler.
#define IRCD_PANICKING(parent, name) \
struct name \
:parent \
{ \
template<class... args> \
[[gnu::noinline]] \
name(const string_view &fmt, args&&... ap) noexcept \
:parent{generate_skip} \
{ \
generate(#name, fmt, ircd::va_rtti{std::forward<args>(ap)...}); \
ircd::panicking(*this); \
} \
\
template<class... args> \
[[gnu::noinline]] \
name(const string_view &fmt = " ") noexcept \
:parent{generate_skip} \
{ \
generate(#name, fmt, ircd::va_rtti{}); \
ircd::panicking(*this); \
} \
\
[[gnu::always_inline]] \
name(generate_skip_t) \
:parent{generate_skip} \
{ \
} \
};
namespace ircd
{
// panic errors; see IRCD_PANICKING docs.
IRCD_PANICKING(exception, panic)
IRCD_PANICKING(panic, not_implemented)
}