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construct/include/ircd/m/vm/fault.h

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// 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_M_VM_FAULT_H
namespace ircd::m::vm
{
enum fault :uint;
using fault_t = std::underlying_type<fault>::type;
string_view reflect(const fault &);
http::code http_code(const fault &);
}
/// Evaluation faults. These are reasons which evaluation has halted but may
/// continue after the user defaults the fault. They are basically types of
/// interrupts and traps, which are supposed to be recoverable. Only the
/// GENERAL protection fault (#gp) is an abort and is not supposed to be
/// recoverable. The fault codes have the form of bitflags so they can be
/// used in masks; outside of that case only one fault is dealt with at
/// a time so they can be switched as they appear in the enum.
///
enum ircd::m::vm::fault
:uint
{
ACCEPT = 0x00, ///< No fault.
EXISTS = 0x01, ///< Replaying existing event. (#ex)
GENERAL = 0x02, ///< General protection fault. (#gp)
INVALID = 0x04, ///< Non-conforming event format. (#ud)
AUTH = 0x08, ///< Auth rules violation. (#av)
STATE = 0x10, ///< Required state is missing (#st)
EVENT = 0x20, ///< Eval requires addl events in the ef register (#ef)
BOUNCE = 0x40, ///< The event is not needed at this time (#bo)
DONOTWANT = 0x80, ///< The event will never be needed (cache this) (#dw)
};