41 lines
1.1 KiB
C++
41 lines
1.1 KiB
C++
/*
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Copyright (c) 2013 Microsoft Corporation. All rights reserved.
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Released under Apache 2.0 license as described in the file LICENSE.
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Author: Leonardo de Moura
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*/
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#include "util/shared_mutex.h"
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#include "kernel/environment.h"
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namespace lean {
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/**
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\brief The environment object is not thread safe.
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The helper classes \c read_only_environment and \c read_write_environment
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provides thread safe access to the environment object.
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\remark We do not use these classes internally.
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They are only used for implementing external APIs.
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*/
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class read_only_environment {
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environment m_env;
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shared_lock m_lock;
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public:
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read_only_environment(environment const & env);
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~read_only_environment();
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operator environment const &() const { return m_env; }
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environment const * operator->() const { return &m_env; }
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};
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/**
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\brief See \c read_only_environment
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*/
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class read_write_environment {
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environment m_env;
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unique_lock m_lock;
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public:
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read_write_environment(environment & env);
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~read_write_environment();
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operator environment &() { return m_env; }
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environment * operator->() { return &m_env; }
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};
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}
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