jeanlemotan
38 lines
767 B
C++
38 lines
767 B
C++
///////////////////////////////////////////////////////////////////////////////
|
|
// Copyright (c) Lewis Baker
|
|
// Licenced under MIT license. See LICENSE.txt for details.
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
#include "spin_mutex.hpp"
|
|
#include "spin_wait.hpp"
|
|
|
|
namespace cppcoro
|
|
{
|
|
spin_mutex::spin_mutex() noexcept
|
|
: m_isLocked(false)
|
|
{
|
|
}
|
|
|
|
bool spin_mutex::try_lock() noexcept
|
|
{
|
|
return !m_isLocked.exchange(true, std::memory_order_acquire);
|
|
}
|
|
|
|
void spin_mutex::lock() noexcept
|
|
{
|
|
spin_wait wait;
|
|
while (!try_lock())
|
|
{
|
|
while (m_isLocked.load(std::memory_order_relaxed))
|
|
{
|
|
wait.spin_one();
|
|
}
|
|
}
|
|
}
|
|
|
|
void spin_mutex::unlock() noexcept
|
|
{
|
|
m_isLocked.store(false, std::memory_order_release);
|
|
}
|
|
}
|