mirror of
https://git.wownero.com/wownero/wownero.git
synced 2024-08-15 01:03:23 +00:00
117 lines
3.3 KiB
C++
117 lines
3.3 KiB
C++
// Copyright (c) 2017, The Monero Project
|
|
//
|
|
// All rights reserved.
|
|
//
|
|
// Redistribution and use in source and binary forms, with or without modification, are
|
|
// permitted provided that the following conditions are met:
|
|
//
|
|
// 1. Redistributions of source code must retain the above copyright notice, this list of
|
|
// conditions and the following disclaimer.
|
|
//
|
|
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
|
|
// of conditions and the following disclaimer in the documentation and/or other
|
|
// materials provided with the distribution.
|
|
//
|
|
// 3. Neither the name of the copyright holder nor the names of its contributors may be
|
|
// used to endorse or promote products derived from this software without specific
|
|
// prior written permission.
|
|
//
|
|
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
|
|
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
|
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
|
|
// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
|
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
|
|
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
#include "common/threadpool.h"
|
|
|
|
#include <cassert>
|
|
#include <limits>
|
|
#include <stdexcept>
|
|
|
|
#include "cryptonote_config.h"
|
|
#include "common/util.h"
|
|
|
|
namespace tools
|
|
{
|
|
threadpool::threadpool() : running(true), active(0) {
|
|
boost::thread::attributes attrs;
|
|
attrs.set_stack_size(THREAD_STACK_SIZE);
|
|
max = tools::get_max_concurrency();
|
|
size_t i = max;
|
|
while(i--) {
|
|
threads.push_back(boost::thread(attrs, boost::bind(&threadpool::run, this)));
|
|
}
|
|
}
|
|
|
|
threadpool::~threadpool() {
|
|
{
|
|
const boost::unique_lock<boost::mutex> lock(mutex);
|
|
running = false;
|
|
has_work.notify_all();
|
|
}
|
|
for (size_t i = 0; i<threads.size(); i++) {
|
|
threads[i].join();
|
|
}
|
|
}
|
|
|
|
void threadpool::submit(waiter *obj, std::function<void()> f) {
|
|
entry e = {obj, f};
|
|
boost::unique_lock<boost::mutex> lock(mutex);
|
|
if (active == max && !queue.empty()) {
|
|
// if all available threads are already running
|
|
// and there's work waiting, just run in current thread
|
|
lock.unlock();
|
|
f();
|
|
} else {
|
|
if (obj)
|
|
obj->inc();
|
|
queue.push_back(e);
|
|
has_work.notify_one();
|
|
}
|
|
}
|
|
|
|
int threadpool::get_max_concurrency() {
|
|
return max;
|
|
}
|
|
|
|
void threadpool::waiter::wait() {
|
|
boost::unique_lock<boost::mutex> lock(mt);
|
|
while(num) cv.wait(lock);
|
|
}
|
|
|
|
void threadpool::waiter::inc() {
|
|
const boost::unique_lock<boost::mutex> lock(mt);
|
|
num++;
|
|
}
|
|
|
|
void threadpool::waiter::dec() {
|
|
const boost::unique_lock<boost::mutex> lock(mt);
|
|
num--;
|
|
if (!num)
|
|
cv.notify_one();
|
|
}
|
|
|
|
void threadpool::run() {
|
|
boost::unique_lock<boost::mutex> lock(mutex);
|
|
while (running) {
|
|
entry e;
|
|
while(queue.empty() && running)
|
|
has_work.wait(lock);
|
|
if (!running) break;
|
|
|
|
active++;
|
|
e = queue.front();
|
|
queue.pop_front();
|
|
lock.unlock();
|
|
e.f();
|
|
|
|
if (e.wo)
|
|
e.wo->dec();
|
|
lock.lock();
|
|
active--;
|
|
}
|
|
}
|
|
}
|