mirror of
https://github.com/matrix-construct/construct
synced 2024-12-11 16:13:01 +01:00
50 lines
1.4 KiB
C++
50 lines
1.4 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_CTX_CRITICAL_ASSERTION_H
|
|
|
|
namespace ircd::ctx
|
|
{
|
|
inline namespace this_ctx
|
|
{
|
|
struct critical_assertion; // Assert no yielding for a section
|
|
}
|
|
|
|
void assert_critical();
|
|
}
|
|
|
|
/// An instance of critical_assertion detects an attempt to context switch.
|
|
///
|
|
/// For when the developer specifically does not want any yielding in a
|
|
/// section or anywhere up the stack from it. This device does not prevent
|
|
/// a switch and may carry no meaning outside of debug-mode compilation. It is
|
|
/// good practice to use this device even when it appears obvious the
|
|
/// section's callgraph has no chance of yielding: code changes, and everything
|
|
/// up the graph can change without taking notice of your section.
|
|
///
|
|
class ircd::ctx::this_ctx::critical_assertion
|
|
{
|
|
#ifndef NDEBUG
|
|
bool theirs;
|
|
|
|
public:
|
|
critical_assertion();
|
|
~critical_assertion() noexcept;
|
|
#endif
|
|
};
|
|
|
|
#ifdef NDEBUG
|
|
inline void
|
|
ircd::ctx::assert_critical()
|
|
{
|
|
// eliminated in non-debug mode.
|
|
}
|
|
#endif
|