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