16f09794cf
The c++ library implementation on MacOS is broken, it does not allow you to correctly use points to members of std::string. We work around this by not directly using member pointers and instead wrapping the method calls with our own functions.
139 lines
3.3 KiB
C++
139 lines
3.3 KiB
C++
// This file is distributed under the BSD License.
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// See "license.txt" for details.
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// Copyright 2009-2012, Jonathan Turner (jonathan@emptycrate.com)
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// and Jason Turner (jason@emptycrate.com)
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// http://www.chaiscript.com
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#ifndef CHAISCRIPT_THREADING_HPP_
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#define CHAISCRIPT_THREADING_HPP_
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#ifndef CHAISCRIPT_NO_THREADS
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#ifdef __llvm__
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#pragma clang diagnostic push
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#pragma clang diagnostic ignored "-Wc++11-long-long"
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#pragma clang diagnostic ignored "-Wshadow"
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#endif
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#include <boost/thread.hpp>
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#ifdef __llvm__
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#pragma clang diagnostic pop
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#endif
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#else
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#pragma message ("ChaiScript is compiling without thread safety.")
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#endif
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/// \file
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///
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/// This file contains code necessary for thread support in ChaiScript.
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/// If the compiler definition CHAISCRIPT_NO_THREADS is defined then thread safety
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/// is disabled in ChaiScript. This has the result that some code is faster, because mutex locks are not required.
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/// It also has the side effect that the chaiscript::ChaiScript object may not be accessed from more than
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/// one thread simultaneously.
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namespace chaiscript
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{
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namespace detail
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{
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/// If threading is enabled, then this namespace contains boost::thread classes.
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/// If threading is not enabled, then stubbed in wrappers that do nothing are provided.
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/// This allows us to avoid \#ifdef code in the sections that need thread safety.
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namespace threading
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{
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#ifndef CHAISCRIPT_NO_THREADS
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using boost::unique_lock;
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using boost::shared_lock;
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using boost::lock_guard;
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using boost::shared_mutex;
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using boost::recursive_mutex;
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/// Typesafe thread specific storage. If threading is enabled, this class uses boost::thread_specific_ptr<T>. If
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/// threading is not enabled, the class always returns the same data, regardless of which thread it is called from.
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template<typename T>
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class Thread_Storage
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{
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public:
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~Thread_Storage()
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{
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m_thread_storage.reset();
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}
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inline T *operator->() const
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{
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if (!m_thread_storage.get())
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{
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m_thread_storage.reset(new T());
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}
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return m_thread_storage.get();
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}
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inline T &operator*() const
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{
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return *(this->operator->());
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}
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private:
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mutable boost::thread_specific_ptr<T> m_thread_storage;
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};
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#else
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template<typename T>
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class unique_lock
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{
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public:
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unique_lock(T &) {}
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void lock() {}
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void unlock() {}
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};
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template<typename T>
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class shared_lock
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{
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public:
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shared_lock(T &) {}
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void lock() {}
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void unlock() {}
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};
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template<typename T>
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class lock_guard
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{
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public:
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lock_guard(T &) {}
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};
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class shared_mutex { };
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class recursive_mutex {};
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template<typename T>
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class Thread_Storage
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{
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public:
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inline T *operator->() const
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{
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return &obj;
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}
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inline T &operator*() const
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{
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return obj;
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}
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private:
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mutable T obj;
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};
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#endif
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}
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}
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}
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#endif
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