136 lines
4.5 KiB
C++
136 lines
4.5 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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#pragma once
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#if defined(LEAN_MULTI_THREAD)
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#if !defined(LEAN_USE_BOOST)
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// MULTI THREADING SUPPORT BASED ON THE STANDARD LIBRARY
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#include <thread>
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#include <mutex>
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#include <atomic>
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#include <condition_variable>
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#include <chrono>
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#define LEAN_THREAD_LOCAL thread_local
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namespace lean {
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inline void set_thread_stack_size(size_t ) {}
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using std::thread;
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using std::mutex;
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using std::atomic;
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using std::atomic_bool;
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using std::atomic_ushort;
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using std::atomic_uchar;
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using std::condition_variable;
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using std::lock_guard;
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using std::unique_lock;
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using std::atomic_load;
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using std::atomic_fetch_add_explicit;
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using std::atomic_fetch_sub_explicit;
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using std::memory_order_relaxed;
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namespace chrono = std::chrono;
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namespace this_thread = std::this_thread;
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}
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#else
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// MULTI THREADING SUPPORT BASED ON THE BOOST LIBRARY
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#include <boost/thread.hpp>
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#define LEAN_THREAD_LOCAL thread_local
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namespace lean {
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void set_thread_stack_size(size_t );
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boost::thread::attributes const & get_thread_attributes();
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using boost::thread;
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using boost::mutex;
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using boost::atomic;
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using boost::memory_order_relaxed;
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using boost::condition_variable;
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using boost::unique_lock;
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using boost::lock_guard;
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namespace chrono = boost::chrono;
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namespace this_thread = boost::this_thread;
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typedef atomic<bool> atomic_bool;
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typedef atomic<unsigned short> atomic_ushort;
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typedef atomic<unsigned char> atomic_uchar;
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template<typename T> T atomic_load(atomic<T> const * a) { return a->load(); }
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template<typename T> T atomic_fetch_add_explicit(atomic<T> * a, T v, boost::memory_order mo) { return a->fetch_add(v, mo); }
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template<typename T> T atomic_fetch_sub_explicit(atomic<T> * a, T v, boost::memory_order mo) { return a->fetch_sub(v, mo); }
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}
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#endif
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#else
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// NO MULTI THREADING SUPPORT
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#include <utility>
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#include <cstdlib>
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#define LEAN_THREAD_LOCAL
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namespace lean {
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inline void set_thread_stack_size(size_t ) {}
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namespace chrono {
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typedef unsigned milliseconds;
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}
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constexpr int memory_order_relaxed = 0;
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template<typename T>
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class atomic {
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T m_value;
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public:
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atomic(T const & v = T()):m_value(v) {}
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atomic(T && v):m_value(std::forward<T>(v)) {}
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atomic(atomic const & v):m_value(v.m_value) {}
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atomic(atomic && v):m_value(std::forward<T>(v.m_value)) {}
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atomic & operator=(T const & v) { m_value = v; return *this; }
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atomic & operator=(T && v) { m_value = std::forward<T>(v); return *this; }
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atomic & operator=(atomic const & v) { m_value = v.m_value; return *this; }
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atomic & operator=(atomic && v) { m_value = std::forward<T>(v.m_value); return *this; }
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operator T() const { return m_value; }
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void store(T const & v) { m_value = v; }
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T load() const { return m_value; }
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atomic & operator|=(T const & v) { m_value |= v; return *this; }
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atomic & operator+=(T const & v) { m_value += v; return *this; }
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atomic & operator-=(T const & v) { m_value -= v; return *this; }
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atomic & operator++() { ++m_value; return *this; }
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atomic operator++(int ) { atomic tmp(*this); ++m_value; return tmp; }
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atomic & operator--() { --m_value; return *this; }
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atomic operator--(int ) { atomic tmp(*this); --m_value; return tmp; }
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friend T atomic_load(atomic const * a) { return a->m_value; }
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friend T atomic_fetch_add_explicit(atomic * a, T const & v, int ) { T r(a->m_value); a->m_value += v; return r; }
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friend T atomic_fetch_sub_explicit(atomic * a, T const & v, int ) { T r(a->m_value); a->m_value -= v; return r; }
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};
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typedef atomic<unsigned short> atomic_ushort;
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typedef atomic<unsigned char> atomic_uchar;
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typedef atomic<bool> atomic_bool;
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class thread {
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public:
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thread() {}
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template<typename Function, typename... Args>
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thread(Function && fun, Args &&... args) {
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fun(std::forward<Args>(args)...);
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}
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typedef unsigned id;
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bool joinable() const { return true; }
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void join() {}
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};
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class this_thread {
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public:
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static void sleep_for(chrono::milliseconds const &) {}
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static thread::id get_id() { return 0; }
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static void yield() {}
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};
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class mutex {
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public:
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void lock() {}
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void unlock() {}
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};
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class condition_variable {
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public:
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template<typename Lock> void wait(Lock const &) {}
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void notify_all() {}
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void notify_one() {}
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};
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template<typename T> class lock_guard {
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public:
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lock_guard(T const &) {}
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};
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template<typename T> class unique_lock {
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public:
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unique_lock(T const &) {}
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};
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}
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#endif
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