update modules

headers/3rdparty/promise.hpp/jobber.hpp

@@ -0,0 +1,399 @@
+/*******************************************************************************
+ * This file is part of the "promise.hpp"
+ * For conditions of distribution and use, see copyright notice in LICENSE.md
+ * Copyright (C) 2018 Matvey Cherevko
+ ******************************************************************************/
+
+#pragma once
+
+#include <cstdint>
+#include <cassert>
+
+#include <tuple>
+#include <mutex>
+#include <atomic>
+#include <thread>
+#include <chrono>
+#include <memory>
+#include <vector>
+#include <utility>
+#include <exception>
+#include <stdexcept>
+#include <type_traits>
+#include <condition_variable>
+
+#include "promise.hpp"
+
+namespace jobber_hpp
+{
+    using namespace promise_hpp;
+
+    enum class jobber_priority {
+        lowest,
+        below_normal,
+        normal,
+        above_normal,
+        highest
+    };
+
+    enum class jobber_wait_status {
+        no_timeout,
+        cancelled,
+        timeout
+    };
+
+    class jobber_cancelled_exception : public std::runtime_error {
+    public:
+        jobber_cancelled_exception()
+        : std::runtime_error("jobber has stopped working") {}
+    };
+
+    class jobber final : private detail::noncopyable {
+    public:
+        explicit jobber(std::size_t threads);
+        ~jobber() noexcept;
+
+        template < typename F, typename... Args >
+        using async_invoke_result_t = invoke_hpp::invoke_result_t<
+            std::decay_t<F>,
+            std::decay_t<Args>...>;
+
+        template < typename F, typename... Args
+                 , typename R = async_invoke_result_t<F, Args...> >
+        promise<R> async(F&& f, Args&&... args);
+
+        template < typename F, typename... Args
+                 , typename R = async_invoke_result_t<F, Args...> >
+        promise<R> async(jobber_priority priority, F&& f, Args&&... args);
+
+        void pause() noexcept;
+        void resume() noexcept;
+        bool is_paused() const noexcept;
+
+        jobber_wait_status wait_all() const noexcept;
+        jobber_wait_status active_wait_all() noexcept;
+
+        template < typename Rep, typename Period >
+        jobber_wait_status wait_all_for(
+            const std::chrono::duration<Rep, Period>& timeout_duration) const;
+
+        template < typename Clock, typename Duration >
+        jobber_wait_status wait_all_until(
+            const std::chrono::time_point<Clock, Duration>& timeout_time) const;
+
+        template < typename Rep, typename Period >
+        jobber_wait_status active_wait_all_for(
+            const std::chrono::duration<Rep, Period>& timeout_duration);
+
+        template < typename Clock, typename Duration >
+        jobber_wait_status active_wait_all_until(
+            const std::chrono::time_point<Clock, Duration>& timeout_time);
+    private:
+        class task;
+        using task_ptr = std::unique_ptr<task>;
+        template < typename R, typename F, typename... Args >
+        class concrete_task;
+    private:
+        void push_task_(jobber_priority priority, task_ptr task);
+        task_ptr pop_task_() noexcept;
+        void shutdown_() noexcept;
+        void worker_main_() noexcept;
+        void process_task_(std::unique_lock<std::mutex> lock) noexcept;
+    private:
+        std::vector<std::thread> threads_;
+        std::vector<std::pair<jobber_priority, task_ptr>> tasks_;
+        std::atomic<bool> paused_{false};
+        std::atomic<bool> cancelled_{false};
+        std::atomic<std::size_t> active_task_count_{0};
+        mutable std::mutex tasks_mutex_;
+        mutable std::condition_variable cond_var_;
+    };
+
+    class jobber::task : private noncopyable {
+    public:
+        virtual ~task() noexcept = default;
+        virtual void run() noexcept = 0;
+        virtual void cancel() noexcept = 0;
+    };
+
+    template < typename R, typename F, typename... Args >
+    class jobber::concrete_task : public task {
+        F f_;
+        std::tuple<Args...> args_;
+        promise<R> promise_;
+    public:
+        template < typename U >
+        concrete_task(U&& u, std::tuple<Args...>&& args);
+        void run() noexcept final;
+        void cancel() noexcept final;
+        promise<R> future() noexcept;
+    };
+
+    template < typename F, typename... Args >
+    class jobber::concrete_task<void, F, Args...> : public task {
+        F f_;
+        std::tuple<Args...> args_;
+        promise<void> promise_;
+    public:
+        template < typename U >
+        concrete_task(U&& u, std::tuple<Args...>&& args);
+        void run() noexcept final;
+        void cancel() noexcept final;
+        promise<void> future() noexcept;
+    };
+}
+
+namespace jobber_hpp
+{
+    inline jobber::jobber(std::size_t threads) {
+        try {
+            threads_.resize(threads);
+            for ( std::thread& thread : threads_ ) {
+                thread = std::thread(&jobber::worker_main_, this);
+            }
+        } catch (...) {
+            shutdown_();
+            throw;
+        }
+    }
+
+    inline jobber::~jobber() noexcept {
+        shutdown_();
+    }
+
+    template < typename F, typename... Args, typename R >
+    promise<R> jobber::async(F&& f, Args&&... args) {
+        return async(
+            jobber_priority::normal,
+            std::forward<F>(f),
+            std::forward<Args>(args)...);
+    }
+
+    template < typename F, typename... Args, typename R >
+    promise<R> jobber::async(jobber_priority priority, F&& f, Args&&... args) {
+        using task_t = concrete_task<
+            R,
+            std::decay_t<F>,
+            std::decay_t<Args>...>;
+        std::unique_ptr<task_t> task = std::make_unique<task_t>(
+            std::forward<F>(f),
+            std::make_tuple(std::forward<Args>(args)...));
+        promise<R> future = task->future();
+        std::lock_guard<std::mutex> guard(tasks_mutex_);
+        push_task_(priority, std::move(task));
+        return future;
+    }
+
+    inline void jobber::pause() noexcept {
+        std::lock_guard<std::mutex> guard(tasks_mutex_);
+        paused_.store(true);
+        cond_var_.notify_all();
+    }
+
+    inline void jobber::resume() noexcept {
+        std::lock_guard<std::mutex> guard(tasks_mutex_);
+        paused_.store(false);
+        cond_var_.notify_all();
+    }
+
+    inline bool jobber::is_paused() const noexcept {
+        return paused_;
+    }
+
+    inline jobber_wait_status jobber::wait_all() const noexcept {
+        std::unique_lock<std::mutex> lock(tasks_mutex_);
+        cond_var_.wait(lock, [this](){
+            return cancelled_ || !active_task_count_;
+        });
+        return cancelled_
+            ? jobber_wait_status::cancelled
+            : jobber_wait_status::no_timeout;
+    }
+
+    inline jobber_wait_status jobber::active_wait_all() noexcept {
+        while ( !cancelled_ && active_task_count_ ) {
+            std::unique_lock<std::mutex> lock(tasks_mutex_);
+            cond_var_.wait(lock, [this](){
+                return cancelled_ || !active_task_count_ || !tasks_.empty();
+            });
+            if ( !tasks_.empty() ) {
+                process_task_(std::move(lock));
+            }
+        }
+        return cancelled_
+            ? jobber_wait_status::cancelled
+            : jobber_wait_status::no_timeout;
+    }
+
+    template < typename Rep, typename Period >
+    jobber_wait_status jobber::wait_all_for(
+        const std::chrono::duration<Rep, Period>& timeout_duration) const
+    {
+        return wait_all_until(
+            std::chrono::steady_clock::now() + timeout_duration);
+    }
+
+    template < typename Clock, typename Duration >
+    jobber_wait_status jobber::wait_all_until(
+        const std::chrono::time_point<Clock, Duration>& timeout_time) const
+    {
+        std::unique_lock<std::mutex> lock(tasks_mutex_);
+        return cond_var_.wait_until(lock, timeout_time, [this](){
+            return cancelled_ || !active_task_count_;
+        })  ? jobber_wait_status::no_timeout
+            : jobber_wait_status::timeout;
+    }
+
+    template < typename Rep, typename Period >
+    jobber_wait_status jobber::active_wait_all_for(
+        const std::chrono::duration<Rep, Period>& timeout_duration)
+    {
+        return active_wait_all_until(
+            std::chrono::steady_clock::now() + timeout_duration);
+    }
+
+    template < typename Clock, typename Duration >
+    jobber_wait_status jobber::active_wait_all_until(
+        const std::chrono::time_point<Clock, Duration>& timeout_time)
+    {
+        while ( !cancelled_ && active_task_count_ ) {
+            if ( !(Clock::now() < timeout_time) ) {
+                return jobber_wait_status::timeout;
+            }
+            std::unique_lock<std::mutex> lock(tasks_mutex_);
+            cond_var_.wait_until(lock, timeout_time, [this](){
+                return cancelled_ || !active_task_count_ || !tasks_.empty();
+            });
+            if ( !tasks_.empty() ) {
+                process_task_(std::move(lock));
+            }
+        }
+        return cancelled_
+            ? jobber_wait_status::cancelled
+            : jobber_wait_status::no_timeout;
+    }
+
+    inline void jobber::push_task_(jobber_priority priority, task_ptr task) {
+        tasks_.emplace_back(priority, std::move(task));
+        std::push_heap(tasks_.begin(), tasks_.end());
+        ++active_task_count_;
+        cond_var_.notify_all();
+    }
+
+    inline jobber::task_ptr jobber::pop_task_() noexcept {
+        if ( !tasks_.empty() ) {
+            std::pop_heap(tasks_.begin(), tasks_.end());
+            task_ptr task = std::move(tasks_.back().second);
+            tasks_.pop_back();
+            return task;
+        }
+        return nullptr;
+    }
+
+    inline void jobber::shutdown_() noexcept {
+        {
+            std::lock_guard<std::mutex> guard(tasks_mutex_);
+            while ( !tasks_.empty() ) {
+                task_ptr task = pop_task_();
+                if ( task ) {
+                    task->cancel();
+                    --active_task_count_;
+                }
+            }
+            cancelled_.store(true);
+            cond_var_.notify_all();
+        }
+        for ( std::thread& thread : threads_ ) {
+            if ( thread.joinable() ) {
+                thread.join();
+            }
+        }
+    }
+
+    inline void jobber::worker_main_() noexcept {
+        while ( true ) {
+            std::unique_lock<std::mutex> lock(tasks_mutex_);
+            cond_var_.wait(lock, [this](){
+                return cancelled_ || (!paused_ && !tasks_.empty());
+            });
+            if ( cancelled_ ) {
+                break;
+            }
+            process_task_(std::move(lock));
+        }
+    }
+
+    inline void jobber::process_task_(std::unique_lock<std::mutex> lock) noexcept {
+        assert(lock.owns_lock());
+        task_ptr task = pop_task_();
+        if ( task ) {
+            lock.unlock();
+            task->run();
+            --active_task_count_;
+            cond_var_.notify_all();
+        }
+    }
+}
+
+namespace jobber_hpp
+{
+    //
+    // concrete_task<R, F, Args...>
+    //
+
+    template < typename R, typename F, typename... Args >
+    template < typename U >
+    jobber::concrete_task<R, F, Args...>::concrete_task(U&& u, std::tuple<Args...>&& args)
+    : f_(std::forward<U>(u))
+    , args_(std::move(args)) {}
+
+    template < typename R, typename F, typename... Args >
+    void jobber::concrete_task<R, F, Args...>::run() noexcept {
+        try {
+            R value = invoke_hpp::apply(std::move(f_), std::move(args_));
+            promise_.resolve(std::move(value));
+        } catch (...) {
+            promise_.reject(std::current_exception());
+        }
+    }
+
+    template < typename R, typename F, typename... Args >
+    void jobber::concrete_task<R, F, Args...>::cancel() noexcept {
+        promise_.reject(jobber_cancelled_exception());
+    }
+
+    template < typename R, typename F, typename... Args >
+    promise<R> jobber::concrete_task<R, F, Args...>::future() noexcept {
+        return promise_;
+    }
+
+    //
+    // concrete_task<void, F, Args...>
+    //
+
+    template < typename F, typename... Args >
+    template < typename U >
+    jobber::concrete_task<void, F, Args...>::concrete_task(U&& u, std::tuple<Args...>&& args)
+    : f_(std::forward<U>(u))
+    , args_(std::move(args)) {}
+
+    template < typename F, typename... Args >
+    void jobber::concrete_task<void, F, Args...>::run() noexcept {
+        try {
+            invoke_hpp::apply(std::move(f_), std::move(args_));
+            promise_.resolve();
+        } catch (...) {
+            promise_.reject(std::current_exception());
+        }
+    }
+
+    template < typename F, typename... Args >
+    void jobber::concrete_task<void, F, Args...>::cancel() noexcept {
+        promise_.reject(jobber_cancelled_exception());
+    }
+
+    template < typename F, typename... Args >
+    promise<void> jobber::concrete_task<void, F, Args...>::future() noexcept {
+        return promise_;
+    }
+}

headers/3rdparty/promise.hpp/promise.hpp

@@ -12,6 +12,7 @@
 #include <new>
 #include <mutex>
 #include <atomic>
+#include <chrono>
 #include <memory>
 #include <vector>
 #include <utility>
@@ -20,6 +21,7 @@
 #include <stdexcept>
 #include <functional>
 #include <type_traits>
+#include <condition_variable>
 
 //
 // invoke.hpp
@@ -368,6 +370,15 @@ namespace promise_hpp
         };
     }
 
+    //
+    // promise_wait_status
+    //
+
+    enum class promise_wait_status {
+        no_timeout,
+        timeout
+    };
+
     //
     // promise<T>
     //
@@ -376,12 +387,6 @@ namespace promise_hpp
     class promise final {
     public:
         using value_type = T;
-
-        enum class status : std::uint8_t {
-            pending,
-            resolved,
-            rejected
-        };
     public:
         promise()
         : state_(std::make_shared<state>()) {}
@@ -535,6 +540,28 @@ namespace promise_hpp
             return state_->reject(
                 std::make_exception_ptr(std::forward<E>(e)));
         }
+
+        const T& get() const {
+            return state_->get();
+        }
+
+        void wait() const noexcept {
+            state_->wait();
+        }
+
+        template < typename Rep, typename Period >
+        promise_wait_status wait_for(
+            const std::chrono::duration<Rep, Period>& timeout_duration) const
+        {
+            return state_->wait_for(timeout_duration);
+        }
+
+        template < typename Clock, typename Duration >
+        promise_wait_status wait_until(
+            const std::chrono::time_point<Clock, Duration>& timeout_time) const
+        {
+            return state_->wait_until(timeout_time);
+        }
     private:
         class state;
         std::shared_ptr<state> state_;
@@ -552,6 +579,7 @@ namespace promise_hpp
                 storage_.set(std::forward<U>(value));
                 status_ = status::resolved;
                 invoke_resolve_handlers_();
+                cond_var_.notify_all();
                 return true;
             }
 
@@ -563,9 +591,51 @@ namespace promise_hpp
                 exception_ = e;
                 status_ = status::rejected;
                 invoke_reject_handlers_();
+                cond_var_.notify_all();
                 return true;
             }
 
+            const T& get() {
+                std::unique_lock<std::mutex> lock(mutex_);
+                cond_var_.wait(lock, [this](){
+                    return status_ != status::pending;
+                });
+                if ( status_ == status::rejected ) {
+                    std::rethrow_exception(exception_);
+                }
+                assert(status_ == status::resolved);
+                return storage_.value();
+            }
+
+            void wait() const noexcept {
+                std::unique_lock<std::mutex> lock(mutex_);
+                cond_var_.wait(lock, [this](){
+                    return status_ != status::pending;
+                });
+            }
+
+            template < typename Rep, typename Period >
+            promise_wait_status wait_for(
+                const std::chrono::duration<Rep, Period>& timeout_duration) const
+            {
+                std::unique_lock<std::mutex> lock(mutex_);
+                return cond_var_.wait_for(lock, timeout_duration, [this](){
+                    return status_ != status::pending;
+                })  ? promise_wait_status::no_timeout
+                    : promise_wait_status::timeout;
+            }
+
+            template < typename Clock, typename Duration >
+            promise_wait_status wait_until(
+                const std::chrono::time_point<Clock, Duration>& timeout_time) const
+            {
+                std::unique_lock<std::mutex> lock(mutex_);
+                return cond_var_.wait_until(lock, timeout_time, [this](){
+                    return status_ != status::pending;
+                })  ? promise_wait_status::no_timeout
+                    : promise_wait_status::timeout;
+            }
+
             template < typename U, typename ResolveF, typename RejectF >
             std::enable_if_t<std::is_void<U>::value, void>
             attach(promise<U>& next, ResolveF&& resolve, RejectF&& reject) {
@@ -674,11 +744,17 @@ namespace promise_hpp
                 handlers_.clear();
             }
         private:
-            detail::storage<T> storage_;
-            status status_ = status::pending;
-            std::exception_ptr exception_ = nullptr;
+            enum class status {
+                pending,
+                resolved,
+                rejected
+            };
 
-            std::mutex mutex_;
+            status status_{status::pending};
+            std::exception_ptr exception_{nullptr};
+
+            mutable std::mutex mutex_;
+            mutable std::condition_variable cond_var_;
 
             struct handler {
                 using resolve_t = std::function<void(const T&)>;
@@ -694,6 +770,7 @@ namespace promise_hpp
             };
 
             std::vector<handler> handlers_;
+            detail::storage<T> storage_;
         };
     };
 
@@ -705,12 +782,6 @@ namespace promise_hpp
     class promise<void> final {
     public:
         using value_type = void;
-
-        enum class status : std::uint8_t {
-            pending,
-            resolved,
-            rejected
-        };
     public:
         promise()
         : state_(std::make_shared<state>()) {}
@@ -858,6 +929,28 @@ namespace promise_hpp
             return state_->reject(
                 std::make_exception_ptr(std::forward<E>(e)));
         }
+
+        void get() const {
+            state_->get();
+        }
+
+        void wait() const noexcept {
+            state_->wait();
+        }
+
+        template < typename Rep, typename Period >
+        promise_wait_status wait_for(
+            const std::chrono::duration<Rep, Period>& timeout_duration) const
+        {
+            return state_->wait_for(timeout_duration);
+        }
+
+        template < typename Clock, typename Duration >
+        promise_wait_status wait_until(
+            const std::chrono::time_point<Clock, Duration>& timeout_time) const
+        {
+            return state_->wait_until(timeout_time);
+        }
     private:
         class state;
         std::shared_ptr<state> state_;
@@ -873,6 +966,7 @@ namespace promise_hpp
                 }
                 status_ = status::resolved;
                 invoke_resolve_handlers_();
+                cond_var_.notify_all();
                 return true;
             }
 
@@ -884,9 +978,50 @@ namespace promise_hpp
                 exception_ = e;
                 status_ = status::rejected;
                 invoke_reject_handlers_();
+                cond_var_.notify_all();
                 return true;
             }
 
+            void get() {
+                std::unique_lock<std::mutex> lock(mutex_);
+                cond_var_.wait(lock, [this](){
+                    return status_ != status::pending;
+                });
+                if ( status_ == status::rejected ) {
+                    std::rethrow_exception(exception_);
+                }
+                assert(status_ == status::resolved);
+            }
+
+            void wait() const noexcept {
+                std::unique_lock<std::mutex> lock(mutex_);
+                cond_var_.wait(lock, [this](){
+                    return status_ != status::pending;
+                });
+            }
+
+            template < typename Rep, typename Period >
+            promise_wait_status wait_for(
+                const std::chrono::duration<Rep, Period>& timeout_duration) const
+            {
+                std::unique_lock<std::mutex> lock(mutex_);
+                return cond_var_.wait_for(lock, timeout_duration, [this](){
+                    return status_ != status::pending;
+                })  ? promise_wait_status::no_timeout
+                    : promise_wait_status::timeout;
+            }
+
+            template < typename Clock, typename Duration >
+            promise_wait_status wait_until(
+                const std::chrono::time_point<Clock, Duration>& timeout_time) const
+            {
+                std::unique_lock<std::mutex> lock(mutex_);
+                return cond_var_.wait_until(lock, timeout_time, [this](){
+                    return status_ != status::pending;
+                })  ? promise_wait_status::no_timeout
+                    : promise_wait_status::timeout;
+            }
+
             template < typename U, typename ResolveF, typename RejectF >
             std::enable_if_t<std::is_void<U>::value, void>
             attach(promise<U>& next, ResolveF&& resolve, RejectF&& reject) {
@@ -991,10 +1126,17 @@ namespace promise_hpp
                 handlers_.clear();
             }
         private:
-            status status_ = status::pending;
-            std::exception_ptr exception_ = nullptr;
+            enum class status {
+                pending,
+                resolved,
+                rejected
+            };
 
-            std::mutex mutex_;
+            status status_{status::pending};
+            std::exception_ptr exception_{nullptr};
+
+            mutable std::mutex mutex_;
+            mutable std::condition_variable cond_var_;
 
             struct handler {
                 using resolve_t = std::function<void()>;

headers/3rdparty/promise.hpp/scheduler.hpp

@@ -0,0 +1,307 @@
+/*******************************************************************************
+ * This file is part of the "promise.hpp"
+ * For conditions of distribution and use, see copyright notice in LICENSE.md
+ * Copyright (C) 2018 Matvey Cherevko
+ ******************************************************************************/
+
+#pragma once
+
+#include <cstdint>
+#include <cassert>
+
+#include <tuple>
+#include <mutex>
+#include <atomic>
+#include <chrono>
+#include <memory>
+#include <vector>
+#include <utility>
+#include <exception>
+#include <stdexcept>
+#include <type_traits>
+#include <condition_variable>
+
+#include "promise.hpp"
+
+namespace scheduler_hpp
+{
+    using namespace promise_hpp;
+
+    enum class scheduler_priority {
+        lowest,
+        below_normal,
+        normal,
+        above_normal,
+        highest
+    };
+
+    enum class scheduler_wait_status {
+        no_timeout,
+        cancelled,
+        timeout
+    };
+
+    class scheduler_cancelled_exception : public std::runtime_error {
+    public:
+        scheduler_cancelled_exception()
+        : std::runtime_error("scheduler has stopped working") {}
+    };
+
+    class scheduler final : private detail::noncopyable {
+    public:
+        scheduler();
+        ~scheduler() noexcept;
+
+        template < typename F, typename... Args >
+        using schedule_invoke_result_t = invoke_hpp::invoke_result_t<
+            std::decay_t<F>,
+            std::decay_t<Args>...>;
+
+        template < typename F, typename... Args
+                 , typename R = schedule_invoke_result_t<F, Args...> >
+        promise<R> schedule(F&& f, Args&&... args);
+
+        template < typename F, typename... Args
+                 , typename R = schedule_invoke_result_t<F, Args...> >
+        promise<R> schedule(scheduler_priority scheduler_priority, F&& f, Args&&... args);
+
+        scheduler_wait_status process_all_tasks() noexcept;
+
+        template < typename Rep, typename Period >
+        scheduler_wait_status process_tasks_for(
+            const std::chrono::duration<Rep, Period>& timeout_duration) noexcept;
+
+        template < typename Clock, typename Duration >
+        scheduler_wait_status process_tasks_until(
+            const std::chrono::time_point<Clock, Duration>& timeout_time) noexcept;
+    private:
+        class task;
+        using task_ptr = std::unique_ptr<task>;
+        template < typename R, typename F, typename... Args >
+        class concrete_task;
+    private:
+        void push_task_(scheduler_priority scheduler_priority, task_ptr task);
+        task_ptr pop_task_() noexcept;
+        void shutdown_() noexcept;
+        void process_task_(std::unique_lock<std::mutex> lock) noexcept;
+    private:
+        std::vector<std::pair<scheduler_priority, task_ptr>> tasks_;
+        std::atomic<bool> cancelled_{false};
+        std::atomic<std::size_t> active_task_count_{0};
+        mutable std::mutex tasks_mutex_;
+        mutable std::condition_variable cond_var_;
+    };
+
+    class scheduler::task : private noncopyable {
+    public:
+        virtual ~task() noexcept = default;
+        virtual void run() noexcept = 0;
+        virtual void cancel() noexcept = 0;
+    };
+
+    template < typename R, typename F, typename... Args >
+    class scheduler::concrete_task : public task {
+        F f_;
+        std::tuple<Args...> args_;
+        promise<R> promise_;
+    public:
+        template < typename U >
+        concrete_task(U&& u, std::tuple<Args...>&& args);
+        void run() noexcept final;
+        void cancel() noexcept final;
+        promise<R> future() noexcept;
+    };
+
+    template < typename F, typename... Args >
+    class scheduler::concrete_task<void, F, Args...> : public task {
+        F f_;
+        std::tuple<Args...> args_;
+        promise<void> promise_;
+    public:
+        template < typename U >
+        concrete_task(U&& u, std::tuple<Args...>&& args);
+        void run() noexcept final;
+        void cancel() noexcept final;
+        promise<void> future() noexcept;
+    };
+}
+
+namespace scheduler_hpp
+{
+    inline scheduler::scheduler() = default;
+
+    inline scheduler::~scheduler() noexcept {
+        shutdown_();
+    }
+
+    template < typename F, typename... Args, typename R >
+    promise<R> scheduler::schedule(F&& f, Args&&... args) {
+        return schedule(
+            scheduler_priority::normal,
+            std::forward<F>(f),
+            std::forward<Args>(args)...);
+    }
+
+    template < typename F, typename... Args, typename R >
+    promise<R> scheduler::schedule(scheduler_priority priority, F&& f, Args&&... args) {
+        using task_t = concrete_task<
+            R,
+            std::decay_t<F>,
+            std::decay_t<Args>...>;
+        std::unique_ptr<task_t> task = std::make_unique<task_t>(
+            std::forward<F>(f),
+            std::make_tuple(std::forward<Args>(args)...));
+        promise<R> future = task->future();
+        std::lock_guard<std::mutex> guard(tasks_mutex_);
+        push_task_(priority, std::move(task));
+        return future;
+    }
+
+    inline scheduler_wait_status scheduler::process_all_tasks() noexcept {
+        while ( !cancelled_ && active_task_count_ ) {
+            std::unique_lock<std::mutex> lock(tasks_mutex_);
+            cond_var_.wait(lock, [this](){
+                return cancelled_ || !active_task_count_ || !tasks_.empty();
+            });
+            if ( !tasks_.empty() ) {
+                process_task_(std::move(lock));
+            }
+        }
+        return cancelled_
+            ? scheduler_wait_status::cancelled
+            : scheduler_wait_status::no_timeout;
+    }
+
+    template < typename Rep, typename Period >
+    scheduler_wait_status scheduler::process_tasks_for(
+        const std::chrono::duration<Rep, Period>& timeout_duration) noexcept
+    {
+        return process_tasks_until(
+            std::chrono::steady_clock::now() + timeout_duration);
+    }
+
+    template < typename Clock, typename Duration >
+    scheduler_wait_status scheduler::process_tasks_until(
+        const std::chrono::time_point<Clock, Duration>& timeout_time) noexcept
+    {
+        while ( !cancelled_ && active_task_count_ ) {
+            if ( !(Clock::now() < timeout_time) ) {
+                return scheduler_wait_status::timeout;
+            }
+            std::unique_lock<std::mutex> lock(tasks_mutex_);
+            cond_var_.wait_until(lock, timeout_time, [this](){
+                return cancelled_ || !active_task_count_ || !tasks_.empty();
+            });
+            if ( !tasks_.empty() ) {
+                process_task_(std::move(lock));
+            }
+        }
+        return cancelled_
+            ? scheduler_wait_status::cancelled
+            : scheduler_wait_status::no_timeout;
+    }
+
+    inline void scheduler::push_task_(scheduler_priority priority, task_ptr task) {
+        tasks_.emplace_back(priority, std::move(task));
+        std::push_heap(tasks_.begin(), tasks_.end());
+        ++active_task_count_;
+        cond_var_.notify_all();
+    }
+
+    inline scheduler::task_ptr scheduler::pop_task_() noexcept {
+        if ( !tasks_.empty() ) {
+            std::pop_heap(tasks_.begin(), tasks_.end());
+            task_ptr task = std::move(tasks_.back().second);
+            tasks_.pop_back();
+            return task;
+        }
+        return nullptr;
+    }
+
+    inline void scheduler::shutdown_() noexcept {
+        std::lock_guard<std::mutex> guard(tasks_mutex_);
+        while ( !tasks_.empty() ) {
+            task_ptr task = pop_task_();
+            if ( task ) {
+                task->cancel();
+                --active_task_count_;
+            }
+        }
+        cancelled_.store(true);
+        cond_var_.notify_all();
+    }
+
+    inline void scheduler::process_task_(std::unique_lock<std::mutex> lock) noexcept {
+        assert(lock.owns_lock());
+        task_ptr task = pop_task_();
+        if ( task ) {
+            lock.unlock();
+            task->run();
+            --active_task_count_;
+            cond_var_.notify_all();
+        }
+    }
+}
+
+namespace scheduler_hpp
+{
+    //
+    // concrete_task<R, F, Args...>
+    //
+
+    template < typename R, typename F, typename... Args >
+    template < typename U >
+    scheduler::concrete_task<R, F, Args...>::concrete_task(U&& u, std::tuple<Args...>&& args)
+    : f_(std::forward<U>(u))
+    , args_(std::move(args)) {}
+
+    template < typename R, typename F, typename... Args >
+    void scheduler::concrete_task<R, F, Args...>::run() noexcept {
+        try {
+            R value = invoke_hpp::apply(std::move(f_), std::move(args_));
+            promise_.resolve(std::move(value));
+        } catch (...) {
+            promise_.reject(std::current_exception());
+        }
+    }
+
+    template < typename R, typename F, typename... Args >
+    void scheduler::concrete_task<R, F, Args...>::cancel() noexcept {
+        promise_.reject(scheduler_cancelled_exception());
+    }
+
+    template < typename R, typename F, typename... Args >
+    promise<R> scheduler::concrete_task<R, F, Args...>::future() noexcept {
+        return promise_;
+    }
+
+    //
+    // concrete_task<void, F, Args...>
+    //
+
+    template < typename F, typename... Args >
+    template < typename U >
+    scheduler::concrete_task<void, F, Args...>::concrete_task(U&& u, std::tuple<Args...>&& args)
+    : f_(std::forward<U>(u))
+    , args_(std::move(args)) {}
+
+    template < typename F, typename... Args >
+    void scheduler::concrete_task<void, F, Args...>::run() noexcept {
+        try {
+            invoke_hpp::apply(std::move(f_), std::move(args_));
+            promise_.resolve();
+        } catch (...) {
+            promise_.reject(std::current_exception());
+        }
+    }
+
+    template < typename F, typename... Args >
+    void scheduler::concrete_task<void, F, Args...>::cancel() noexcept {
+        promise_.reject(scheduler_cancelled_exception());
+    }
+
+    template < typename F, typename... Args >
+    promise<void> scheduler::concrete_task<void, F, Args...>::future() noexcept {
+        return promise_;
+    }
+}

headers/3rdparty/variant/lib.hpp

@@ -207,15 +207,8 @@ namespace mpark {
 
           template <typename T, bool = is_swappable<T>::value>
           struct is_nothrow_swappable {
-#if defined(__GNUC__) && !defined(__clang__)
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wnoexcept"
-#endif
             static constexpr bool value =
                 noexcept(swap(std::declval<T &>(), std::declval<T &>()));
-#if defined(__GNUC__) && !defined(__clang__)
-#pragma GCC diagnostic pop
-#endif
           };
 
           template <typename T>

headers/3rdparty/variant/variant.hpp

@@ -1814,19 +1814,12 @@ namespace mpark {
                                                  lib::forward<Vs>(vs)...))
 #endif
 
-#if defined(__GNUC__) && !defined(__clang__)
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wnoexcept"
-#endif
   template <typename... Ts>
   inline auto swap(variant<Ts...> &lhs,
                    variant<Ts...> &rhs) noexcept(noexcept(lhs.swap(rhs)))
       -> decltype(lhs.swap(rhs)) {
     lhs.swap(rhs);
   }
-#if defined(__GNUC__) && !defined(__clang__)
-#pragma GCC diagnostic pop
-#endif
 
   namespace detail {
 

scripts/update_modules.sh

@@ -26,7 +26,9 @@ mkdir -p $HEADERS_RDPARTY_DIR/invoke.hpp
 cp -rfv $MODULES_DIR/invoke.hpp/invoke.hpp $HEADERS_RDPARTY_DIR/invoke.hpp/invoke.hpp
 
 mkdir -p $HEADERS_RDPARTY_DIR/promise.hpp
+cp -rfv $MODULES_DIR/promise.hpp/jobber.hpp $HEADERS_RDPARTY_DIR/promise.hpp/jobber.hpp
 cp -rfv $MODULES_DIR/promise.hpp/promise.hpp $HEADERS_RDPARTY_DIR/promise.hpp/promise.hpp
+cp -rfv $MODULES_DIR/promise.hpp/scheduler.hpp $HEADERS_RDPARTY_DIR/promise.hpp/scheduler.hpp
 
 mkdir -p $SOURCES_RDPARTY_DIR/pugixml
 cp -rfv $MODULES_DIR/pugixml/src/. $SOURCES_RDPARTY_DIR/pugixml/

sources/3rdparty/rapidjson/filereadstream.h

@@ -59,7 +59,7 @@ public:
 
     // For encoding detection only.
     const Ch* Peek4() const {
-        return (current_ + 4 <= bufferLast_) ? current_ : 0;
+        return (current_ + 4 - !eof_ <= bufferLast_) ? current_ : 0;
     }
 
 private:

sources/3rdparty/rapidjson/internal/regex.h

@@ -395,8 +395,7 @@ private:
                 }
                 return false;
 
-            default: 
-                RAPIDJSON_ASSERT(op == kOneOrMore);
+            case kOneOrMore:
                 if (operandStack.GetSize() >= sizeof(Frag)) {
                     Frag e = *operandStack.template Pop<Frag>(1);
                     SizeType s = NewState(kRegexInvalidState, e.start, 0);
@@ -405,6 +404,10 @@ private:
                     return true;
                 }
                 return false;
+
+            default: 
+                // syntax error (e.g. unclosed kLeftParenthesis)
+                return false;
         }
     }
 

sources/3rdparty/rapidjson/istreamwrapper.h

@@ -48,57 +48,71 @@ template <typename StreamType>
 class BasicIStreamWrapper {
 public:
     typedef typename StreamType::char_type Ch;
-    BasicIStreamWrapper(StreamType& stream) : stream_(stream), count_(), peekBuffer_() {}
 
-    Ch Peek() const { 
-        typename StreamType::int_type c = stream_.peek();
-        return RAPIDJSON_LIKELY(c != StreamType::traits_type::eof()) ? static_cast<Ch>(c) : static_cast<Ch>('\0');
+    //! Constructor.
+    /*!
+        \param stream stream opened for read.
+    */
+    BasicIStreamWrapper(StreamType &stream) : stream_(stream), buffer_(peekBuffer_), bufferSize_(4), bufferLast_(0), current_(buffer_), readCount_(0), count_(0), eof_(false) { 
+        Read();
     }
 
-    Ch Take() { 
-        typename StreamType::int_type c = stream_.get();
-        if (RAPIDJSON_LIKELY(c != StreamType::traits_type::eof())) {
-            count_++;
-            return static_cast<Ch>(c);
-        }
-        else
-            return '\0';
+    //! Constructor.
+    /*!
+        \param stream stream opened for read.
+        \param buffer user-supplied buffer.
+        \param bufferSize size of buffer in bytes. Must >=4 bytes.
+    */
+    BasicIStreamWrapper(StreamType &stream, char* buffer, size_t bufferSize) : stream_(stream), buffer_(buffer), bufferSize_(bufferSize), bufferLast_(0), current_(buffer_), readCount_(0), count_(0), eof_(false) { 
+        RAPIDJSON_ASSERT(bufferSize >= 4);
+        Read();
     }
 
-    // tellg() may return -1 when failed. So we count by ourself.
-    size_t Tell() const { return count_; }
+    Ch Peek() const { return *current_; }
+    Ch Take() { Ch c = *current_; Read(); return c; }
+    size_t Tell() const { return count_ + static_cast<size_t>(current_ - buffer_); }
 
-    Ch* PutBegin() { RAPIDJSON_ASSERT(false); return 0; }
+    // Not implemented
     void Put(Ch) { RAPIDJSON_ASSERT(false); }
-    void Flush() { RAPIDJSON_ASSERT(false); }
+    void Flush() { RAPIDJSON_ASSERT(false); } 
+    Ch* PutBegin() { RAPIDJSON_ASSERT(false); return 0; }
     size_t PutEnd(Ch*) { RAPIDJSON_ASSERT(false); return 0; }
 
     // For encoding detection only.
     const Ch* Peek4() const {
-        RAPIDJSON_ASSERT(sizeof(Ch) == 1); // Only usable for byte stream.
-        int i;
-        bool hasError = false;
-        for (i = 0; i < 4; ++i) {
-            typename StreamType::int_type c = stream_.get();
-            if (c == StreamType::traits_type::eof()) {
-                hasError = true;
-                stream_.clear();
-                break;
-            }
-            peekBuffer_[i] = static_cast<Ch>(c);
-        }
-        for (--i; i >= 0; --i)
-            stream_.putback(peekBuffer_[i]);
-        return !hasError ? peekBuffer_ : 0;
+        return (current_ + 4 - !eof_ <= bufferLast_) ? current_ : 0;
     }
 
 private:
+    BasicIStreamWrapper();
     BasicIStreamWrapper(const BasicIStreamWrapper&);
     BasicIStreamWrapper& operator=(const BasicIStreamWrapper&);
 
-    StreamType& stream_;
-    size_t count_;  //!< Number of characters read. Note:
-    mutable Ch peekBuffer_[4];
+    void Read() {
+        if (current_ < bufferLast_)
+            ++current_;
+        else if (!eof_) {
+            count_ += readCount_;
+            readCount_ = bufferSize_;
+            bufferLast_ = buffer_ + readCount_ - 1;
+            current_ = buffer_;
+
+            if (!stream_.read(buffer_, static_cast<std::streamsize>(bufferSize_))) {
+                readCount_ = static_cast<size_t>(stream_.gcount());
+                *(bufferLast_ = buffer_ + readCount_) = '\0';
+                eof_ = true;
+            }
+        }
+    }
+
+    StreamType &stream_;
+    Ch peekBuffer_[4], *buffer_;
+    size_t bufferSize_;
+    Ch *bufferLast_;
+    Ch *current_;
+    size_t readCount_;
+    size_t count_;  //!< Number of characters read
+    bool eof_;
 };
 
 typedef BasicIStreamWrapper<std::istream> IStreamWrapper;