shareable_lock_policies.h

/*****************************************************/
/* lean Concurrent              (c) Tobias Zirr 2011 */
/*****************************************************/

#ifndef LEAN_CONCURRENT_SHAREABLE_LOCK_POLICIES
#define LEAN_CONCURRENT_SHAREABLE_LOCK_POLICIES

#include "../lean.h"

namespace lean
{
namespace concurrent
{

template <class Lockable>
struct shared_lock_policy
{
    static LEAN_INLINE bool try_lock(Lockable &lock)
    {
        return lock.try_lock_shared();
    }
    static LEAN_INLINE void lock(Lockable &lock)
    {
        lock.lock_shared();
    }
    static LEAN_INLINE void unlock(Lockable &lock)
    {
        lock.unlock_shared();
    }
};

template <class Lockable>
struct upgrade_lock_policy
{
    static LEAN_INLINE bool try_lock(Lockable &lock)
    {
        return lock.try_upgrade_lock();
    }
    static LEAN_INLINE void lock(Lockable &lock)
    {
        lock.upgrade_lock();
    }
    static LEAN_INLINE void unlock(Lockable &lock)
    {
        lock.downgrade_lock();
    }
};

} // namespace

using concurrent::shared_lock_policy;
using concurrent::upgrade_lock_policy;

} // namespace

#endif