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//===------------------------- thread.cpp----------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "thread"
#include "exception"
#include <sys/sysctl.h>
_LIBCPP_BEGIN_NAMESPACE_STD
thread::~thread()
{
if (__t_ != nullptr)
terminate();
}
void
thread::join()
{
int ec = pthread_join(__t_, 0);
if (ec)
throw system_error(error_code(ec, system_category()), "thread::join failed");
__t_ = nullptr;
}
void
thread::detach()
{
int ec = EINVAL;
if (__t_ != 0)
{
ec = pthread_detach(__t_);
if (ec == 0)
__t_ = 0;
}
if (ec)
throw system_error(error_code(ec, system_category()), "thread::detach failed");
}
unsigned
thread::hardware_concurrency()
{
int n;
int mib[2] = {CTL_HW, HW_NCPU};
std::size_t s = sizeof(n);
sysctl(mib, 2, &n, &s, 0, 0);
return n;
}
namespace this_thread
{
void
sleep_for(const chrono::nanoseconds& ns)
{
using namespace chrono;
if (ns >= nanoseconds::zero())
{
timespec ts;
ts.tv_sec = static_cast<decltype(ts.tv_sec)>(duration_cast<seconds>(ns).count());
ts.tv_nsec = static_cast<decltype(ts.tv_nsec)>((ns - seconds(ts.tv_sec)).count());
nanosleep(&ts, 0);
}
}
} // this_thread
_LIBCPP_END_NAMESPACE_STD
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