adding thread_group for managing async tasks
This commit is contained in:
Lee Clagett
parent
d51f1af75f
commit
64094e5f4e
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@ -32,7 +32,8 @@ set(common_sources
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dns_utils.cpp
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util.cpp
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i18n.cpp
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perf_timer.cpp)
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perf_timer.cpp
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thread_group.cpp)
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if (STACK_TRACE)
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list(APPEND common_sources stack_trace.cpp)
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@ -55,7 +56,8 @@ set(common_private_headers
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varint.h
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i18n.h
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perf_timer.h
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stack_trace.h)
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stack_trace.h
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thread_group.h)
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monero_private_headers(common
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${common_private_headers})
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@ -0,0 +1,164 @@
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// Copyright (c) 2014-2016, The Monero Project
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//
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without modification, are
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// permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice, this list of
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// conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright notice, this list
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// of conditions and the following disclaimer in the documentation and/or other
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// materials provided with the distribution.
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//
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// 3. Neither the name of the copyright holder nor the names of its contributors may be
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// used to endorse or promote products derived from this software without specific
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// prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "common/thread_group.h"
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#include <cassert>
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#include <limits>
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#include <stdexcept>
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#include "common/util.h"
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namespace tools
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{
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thread_group::thread_group(std::size_t count) : internal() {
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static_assert(
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std::numeric_limits<unsigned>::max() <= std::numeric_limits<std::size_t>::max(),
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"unexpected truncation"
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);
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count = std::min<std::size_t>(count, get_max_concurrency());
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count = count ? count - 1 : 0;
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if (count) {
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internal.emplace(count);
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}
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}
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thread_group::data::data(std::size_t count)
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: threads()
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, head{nullptr}
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, last(std::addressof(head))
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, pending(count)
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, mutex()
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, has_work()
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, finished_work()
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, stop(false) {
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threads.reserve(count);
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while (count--) {
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threads.push_back(std::thread(&thread_group::data::run, this));
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}
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}
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thread_group::data::~data() noexcept {
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{
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const std::unique_lock<std::mutex> lock(mutex);
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stop = true;
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}
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has_work.notify_all();
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finished_work.notify_all();
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for (auto& worker : threads) {
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try {
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worker.join();
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}
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catch(...) {}
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}
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}
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void thread_group::data::sync() noexcept {
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/* This function and `run()` can both throw when acquiring the lock, or in
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the dispatched function. It is tough to recover from either, particularly the
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lock case. These functions are marked as noexcept so that if either call
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throws, the entire process is terminated. Users of the `dispatch` call are
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expected to make their functions noexcept, or use std::packaged_task to copy
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exceptions so that the process will continue in all but the most pessimistic
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cases (std::bad_alloc). This was the existing behavior;
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`asio::io_service::run` propogates errors from dispatched calls, and uncaught
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exceptions on threads result in process termination. */
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assert(!threads.empty());
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bool not_first = false;
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while (true) {
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std::unique_ptr<work> next = nullptr;
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{
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std::unique_lock<std::mutex> lock(mutex);
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pending -= std::size_t(not_first);
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not_first = true;
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finished_work.notify_all();
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if (stop) {
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return;
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}
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next = get_next();
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if (next == nullptr) {
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finished_work.wait(lock, [this] { return pending == 0 || stop; });
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return;
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}
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}
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assert(next->f);
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next->f();
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}
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}
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std::unique_ptr<thread_group::data::work> thread_group::data::get_next() noexcept {
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std::unique_ptr<work> rc = std::move(head.ptr);
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if (rc != nullptr) {
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head.ptr = std::move(rc->next.ptr);
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if (head.ptr == nullptr) {
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last = std::addressof(head);
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}
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}
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return rc;
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}
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void thread_group::data::run() noexcept {
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// see `sync()` source for additional information
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while (true) {
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std::unique_ptr<work> next = nullptr;
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{
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std::unique_lock<std::mutex> lock(mutex);
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--pending;
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finished_work.notify_all();
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has_work.wait(lock, [this] { return head.ptr != nullptr || stop; });
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if (stop) {
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return;
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}
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next = get_next();
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}
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assert(next != nullptr);
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assert(next->f);
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next->f();
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}
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}
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void thread_group::data::dispatch(std::function<void()> f) {
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std::unique_ptr<work> latest(new work{std::move(f), node{nullptr}});
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node* const latest_node = std::addressof(latest->next);
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{
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const std::unique_lock<std::mutex> lock(mutex);
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assert(last != nullptr);
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assert(last->next == nullptr);
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if (pending == std::numeric_limits<std::size_t>::max()) {
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throw std::overflow_error("thread_group exceeded max queue depth");
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}
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last->ptr = std::move(latest);
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last = latest_node;
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++pending;
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}
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has_work.notify_one();
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}
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}
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@ -0,0 +1,133 @@
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// Copyright (c) 2014-2016, The Monero Project
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//
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without modification, are
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// permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice, this list of
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// conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright notice, this list
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// of conditions and the following disclaimer in the documentation and/or other
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// materials provided with the distribution.
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//
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// 3. Neither the name of the copyright holder nor the names of its contributors may be
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// used to endorse or promote products derived from this software without specific
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// prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include <boost/optional/optional.hpp>
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#include <condition_variable>
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#include <cstddef>
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#include <functional>
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#include <thread>
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#include <utility>
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#include <vector>
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namespace tools
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{
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//! Manages zero or more threads for work dispatching
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class thread_group
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{
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public:
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//! Create `min(count, get_max_concurrency()) - 1` threads
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explicit thread_group(std::size_t count);
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thread_group(thread_group const&) = delete;
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thread_group(thread_group&&) = delete;
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//! Joins threads, but does not necessarily run all dispatched functions.
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~thread_group() = default;
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thread_group& operator=(thread_group const&) = delete;
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thread_group& operator=(thread_group&&) = delete;
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/*! Blocks until all functions provided to `dispatch` complete. Does not
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destroy threads. If a dispatched function calls `this->dispatch(...)`,
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`this->sync()` will continue to block until that new function completes. */
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void sync() noexcept {
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if (internal) {
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internal->sync();
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}
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}
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/*! Example usage:
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std::unique_ptr<thread_group, thread_group::lazy_sync> sync(std::addressof(group));
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which guarantees synchronization before the unique_ptr destructor returns. */
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struct lazy_sync {
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void operator()(thread_group* group) const noexcept {
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if (group != nullptr) {
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group->sync();
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}
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}
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};
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/*! `f` is invoked immediately if the thread_group is empty, otherwise
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execution of `f` is queued for next available thread. If `f` is queued, any
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exception leaving that function will result in process termination. Use
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std::packaged_task if exceptions need to be handled. */
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template<typename F>
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void dispatch(F&& f) {
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if (internal) {
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internal->dispatch(std::forward<F>(f));
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}
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else {
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f();
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}
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}
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private:
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class data {
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public:
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data(std::size_t count);
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~data() noexcept;
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void sync() noexcept;
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void dispatch(std::function<void()> f);
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private:
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struct work;
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struct node {
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node() = delete;
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std::unique_ptr<work> ptr;
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};
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struct work {
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work() = delete;
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std::function<void()> f;
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node next;
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};
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//! Requires lock on `mutex`.
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std::unique_ptr<work> get_next() noexcept;
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//! Blocks until destructor is invoked, only call from thread.
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void run() noexcept;
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private:
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std::vector<std::thread> threads;
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node head;
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node* last;
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std::size_t pending;
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std::condition_variable has_work;
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std::condition_variable finished_work;
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std::mutex mutex;
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bool stop;
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};
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private:
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// optionally construct elements, without separate heap allocation
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boost::optional<data> internal;
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};
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}
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@ -28,9 +28,9 @@
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// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include <boost/asio.hpp>
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#include "misc_log_ex.h"
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#include "common/perf_timer.h"
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#include "common/thread_group.h"
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#include "common/util.h"
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#include "rctSigs.h"
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#include "cryptonote_core/cryptonote_format_utils.h"
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@ -38,17 +38,22 @@
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using namespace crypto;
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using namespace std;
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#define KILL_IOSERVICE() \
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if(ioservice_active) \
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{ \
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work.reset(); \
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while (!ioservice.stopped()) ioservice.poll(); \
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threadpool.join_all(); \
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ioservice.stop(); \
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ioservice_active = false; \
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}
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namespace rct {
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namespace {
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struct verRangeWrapper_ {
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void operator()(const key & C, const rangeSig & as, bool &result) const {
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result = verRange(C, as);
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}
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};
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constexpr const verRangeWrapper_ verRangeWrapper{};
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struct verRctMGSimpleWrapper_ {
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void operator()(const key &message, const mgSig &mg, const ctkeyV & pubs, const key & C, bool &result) const {
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result = verRctMGSimple(message, mg, pubs, C);
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}
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};
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constexpr const verRctMGSimpleWrapper_ verRctMGSimpleWrapper{};
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}
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//Schnorr Non-linkable
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//Gen Gives a signature (L1, s1, s2) proving that the sender knows "x" such that xG = one of P1 or P2
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@ -360,10 +365,6 @@ namespace rct {
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return true;
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}
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void verRangeWrapper(const key & C, const rangeSig & as, bool &result) {
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result = verRange(C, as);
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}
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key get_pre_mlsag_hash(const rctSig &rv)
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{
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keyV hashes;
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@ -544,9 +545,6 @@ namespace rct {
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return MLSAG_Ver(message, M, mg, rows);
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}
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void verRctMGSimpleWrapper(const key &message, const mgSig &mg, const ctkeyV & pubs, const key & C, bool &result) {
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result = verRctMGSimple(message, mg, pubs, C);
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}
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//These functions get keys from blockchain
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//replace these when connecting blockchain
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@ -767,38 +765,20 @@ namespace rct {
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// some rct ops can throw
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try
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{
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boost::asio::io_service ioservice;
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boost::thread_group threadpool;
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std::unique_ptr<boost::asio::io_service::work> work(new boost::asio::io_service::work(ioservice));
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size_t threads = tools::get_max_concurrency();
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threads = std::min(threads, rv.outPk.size());
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for (size_t i = 0; i < threads; ++i)
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threadpool.create_thread(boost::bind(&boost::asio::io_service::run, &ioservice));
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bool ioservice_active = true;
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std::deque<bool> results(rv.outPk.size(), false);
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epee::misc_utils::auto_scope_leave_caller ioservice_killer = epee::misc_utils::create_scope_leave_handler([&]() { KILL_IOSERVICE(); });
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tools::thread_group threadpool(rv.outPk.size()); // this must destruct before results
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DP("range proofs verified?");
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for (size_t i = 0; i < rv.outPk.size(); i++) {
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if (threads > 1) {
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ioservice.dispatch(boost::bind(&verRangeWrapper, std::cref(rv.outPk[i].mask), std::cref(rv.p.rangeSigs[i]), std::ref(results[i])));
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}
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else {
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bool tmp = verRange(rv.outPk[i].mask, rv.p.rangeSigs[i]);
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DP(tmp);
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if (!tmp) {
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LOG_ERROR("Range proof verification failed for input " << i);
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return false;
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}
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}
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threadpool.dispatch(
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std::bind(verRangeWrapper, std::cref(rv.outPk[i].mask), std::cref(rv.p.rangeSigs[i]), std::ref(results[i]))
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);
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}
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KILL_IOSERVICE();
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if (threads > 1) {
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for (size_t i = 0; i < rv.outPk.size(); ++i) {
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if (!results[i]) {
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LOG_ERROR("Range proof verified failed for input " << i);
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return false;
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}
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threadpool.sync();
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for (size_t i = 0; i < rv.outPk.size(); ++i) {
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if (!results[i]) {
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LOG_ERROR("Range proof verified failed for input " << i);
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return false;
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}
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}
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@ -832,34 +812,23 @@ namespace rct {
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CHECK_AND_ASSERT_MES(rv.pseudoOuts.size() == rv.p.MGs.size(), false, "Mismatched sizes of rv.pseudoOuts and rv.p.MGs");
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CHECK_AND_ASSERT_MES(rv.pseudoOuts.size() == rv.mixRing.size(), false, "Mismatched sizes of rv.pseudoOuts and mixRing");
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const size_t threads = std::max(rv.outPk.size(), rv.mixRing.size());
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tools::thread_group threadpool(threads);
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{
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boost::asio::io_service ioservice;
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boost::thread_group threadpool;
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std::unique_ptr<boost::asio::io_service::work> work(new boost::asio::io_service::work(ioservice));
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size_t threads = tools::get_max_concurrency();
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threads = std::min(threads, rv.outPk.size());
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for (size_t i = 0; i < threads; ++i)
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threadpool.create_thread(boost::bind(&boost::asio::io_service::run, &ioservice));
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bool ioservice_active = true;
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std::deque<bool> results(rv.outPk.size(), false);
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epee::misc_utils::auto_scope_leave_caller ioservice_killer = epee::misc_utils::create_scope_leave_handler([&]() { KILL_IOSERVICE(); });
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for (i = 0; i < rv.outPk.size(); i++) {
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if (threads > 1) {
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ioservice.dispatch(boost::bind(&verRangeWrapper, std::cref(rv.outPk[i].mask), std::cref(rv.p.rangeSigs[i]), std::ref(results[i])));
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{
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const std::unique_ptr<tools::thread_group, tools::thread_group::lazy_sync>
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sync(std::addressof(threadpool));
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for (i = 0; i < rv.outPk.size(); i++) {
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threadpool.dispatch(
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std::bind(verRangeWrapper, std::cref(rv.outPk[i].mask), std::cref(rv.p.rangeSigs[i]), std::ref(results[i]))
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);
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}
|
||||
else if (!verRange(rv.outPk[i].mask, rv.p.rangeSigs[i])) {
|
||||
LOG_ERROR("Range proof verified failed for input " << i);
|
||||
return false;
|
||||
}
|
||||
}
|
||||
KILL_IOSERVICE();
|
||||
if (threads > 1) {
|
||||
for (size_t i = 0; i < rv.outPk.size(); ++i) {
|
||||
if (!results[i]) {
|
||||
LOG_ERROR("Range proof verified failed for input " << i);
|
||||
return false;
|
||||
}
|
||||
} // threadpool.sync();
|
||||
for (size_t i = 0; i < rv.outPk.size(); ++i) {
|
||||
if (!results[i]) {
|
||||
LOG_ERROR("Range proof verified failed for input " << i);
|
||||
return false;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -875,37 +844,20 @@ namespace rct {
|
|||
key message = get_pre_mlsag_hash(rv);
|
||||
|
||||
{
|
||||
boost::asio::io_service ioservice;
|
||||
boost::thread_group threadpool;
|
||||
std::unique_ptr<boost::asio::io_service::work> work(new boost::asio::io_service::work(ioservice));
|
||||
size_t threads = tools::get_max_concurrency();
|
||||
threads = std::min(threads, rv.mixRing.size());
|
||||
for (size_t i = 0; i < threads; ++i)
|
||||
threadpool.create_thread(boost::bind(&boost::asio::io_service::run, &ioservice));
|
||||
bool ioservice_active = true;
|
||||
std::deque<bool> results(rv.mixRing.size(), false);
|
||||
epee::misc_utils::auto_scope_leave_caller ioservice_killer = epee::misc_utils::create_scope_leave_handler([&]() { KILL_IOSERVICE(); });
|
||||
|
||||
for (i = 0 ; i < rv.mixRing.size() ; i++) {
|
||||
if (threads > 1) {
|
||||
ioservice.dispatch(boost::bind(&verRctMGSimpleWrapper, std::cref(message), std::cref(rv.p.MGs[i]), std::cref(rv.mixRing[i]), std::cref(rv.pseudoOuts[i]), std::ref(results[i])));
|
||||
{
|
||||
const std::unique_ptr<tools::thread_group, tools::thread_group::lazy_sync>
|
||||
sync(std::addressof(threadpool));
|
||||
for (i = 0 ; i < rv.mixRing.size() ; i++) {
|
||||
threadpool.dispatch(
|
||||
std::bind(verRctMGSimpleWrapper, std::cref(message), std::cref(rv.p.MGs[i]), std::cref(rv.mixRing[i]), std::cref(rv.pseudoOuts[i]), std::ref(results[i]))
|
||||
);
|
||||
}
|
||||
else {
|
||||
bool tmpb = verRctMGSimple(message, rv.p.MGs[i], rv.mixRing[i], rv.pseudoOuts[i]);
|
||||
DP(tmpb);
|
||||
if (!tmpb) {
|
||||
LOG_ERROR("verRctMGSimple failed for input " << i);
|
||||
return false;
|
||||
}
|
||||
}
|
||||
}
|
||||
KILL_IOSERVICE();
|
||||
if (threads > 1) {
|
||||
for (size_t i = 0; i < results.size(); ++i) {
|
||||
if (!results[i]) {
|
||||
LOG_ERROR("verRctMGSimple failed for input " << i);
|
||||
return false;
|
||||
}
|
||||
} // threadpool.sync();
|
||||
for (size_t i = 0; i < results.size(); ++i) {
|
||||
if (!results[i]) {
|
||||
LOG_ERROR("verRctMGSimple failed for input " << i);
|
||||
return false;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue