///////////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2008-2012 Artyom Beilis (Tonkikh)
//
// See accompanying file COPYING.TXT file for licensing details.
//
///////////////////////////////////////////////////////////////////////////////
#define CPPCMS_SOURCE
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#if defined(CPPCMS_POSIX)
#include
#endif
namespace cppcms {
namespace impl {
class thread_pool : public booster::noncopyable {
public:
bool cancel(int id) {
booster::unique_lock<:mutex> lock(mutex_);
queue_type::iterator p;
for(p=queue_.begin();p!=queue_.end();++p) {
if(p->first==id) {
queue_.erase(p);
return true;
}
}
return false;
}
int post(booster::function const &job)
{
booster::unique_lock<:mutex> lock(mutex_);
int id=job_id_++;
queue_.push_back(std::make_pair(id,job));
cond_.notify_one();
return id;
}
thread_pool(int threads) :
shut_down_(false),
job_id_(0)
{
workers_.resize(threads);
#if defined(CPPCMS_POSIX)
sigset_t set,old;
sigfillset(&set);
pthread_sigmask(SIG_BLOCK,&set,&old);
#endif
for(int i=0;i lock(mutex_);
shut_down_=true;
cond_.notify_all();
}
for(unsigned i=0;i thread=workers_[i];
workers_[i].reset();
if(thread)
thread->join();
}
}
~thread_pool()
{
try {
stop();
}
catch(...)
{
}
}
private:
void worker()
{
for(;;) {
booster::function job;
{
booster::unique_lock<:mutex> lock(mutex_);
if(shut_down_)
return;
if(!queue_.empty()) {
queue_.front().second.swap(job);
queue_.pop_front();
}
else {
cond_.wait(lock);
}
}
if(job) {
try {
job();
}
catch(std::exception const &e) {
BOOSTER_ERROR("cppcms") << "Catched exception in thread pool" << e.what() <<'\n'
<< booster::trace(e);
}
catch(...) {
BOOSTER_ERROR("cppcms") << "Catched unknown exception in thread pool";
}
}
}
}
booster::mutex mutex_;
booster::condition_variable cond_;
bool shut_down_;
int job_id_;
typedef std::list<:pair> > > queue_type;
queue_type queue_;
std::vector<:shared_ptr> > workers_;
};
}
thread_pool::thread_pool(int n) :
impl_(new impl::thread_pool(n))
{
}
int thread_pool::post(booster::function const &job)
{
return impl_->post(job);
}
void thread_pool::stop()
{
impl_->stop();
}
bool thread_pool::cancel(int id)
{
return impl_->cancel(id);
}
thread_pool::~thread_pool()
{
}
} // cppcms