st_scheduler.cpp

C++的一个好库。。。现在很流行

// (C) Copyright Mac Murrett 2001.
// Use, modification and distribution are subject to the 
// Boost Software License, Version 1.0. (See accompanying file 
// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)

// See http://www.boost.org for most recent version.

#include "st_scheduler.hpp"

#include <cassert>


namespace boost {

namespace threads {

namespace mac {

namespace detail {


#if TARGET_CARBON

st_scheduler::st_scheduler():
    m_uppTask(NULL),
    m_pTimer(NULL)
{
    m_uppTask = NewEventLoopTimerUPP(task_entry);
// TODO - throw on error
    assert(m_uppTask != NULL);
}

st_scheduler::~st_scheduler()
{
    DisposeEventLoopTimerUPP(m_uppTask);
    m_uppTask = NULL;
}


void st_scheduler::start_polling()
{
    assert(m_pTimer == NULL);
    OSStatus lStatus = InstallEventLoopTimer(GetMainEventLoop(),
                                                0 * kEventDurationSecond,
                                                kEventDurationMillisecond,
                                                m_uppTask,
                                                this,
                                                &m_pTimer);
// TODO - throw on error
    assert(lStatus == noErr);
}

void st_scheduler::stop_polling()
{
    assert(m_pTimer != NULL);
    OSStatus lStatus = RemoveEventLoopTimer(m_pTimer);
    assert(lStatus == noErr);
    m_pTimer = NULL;
}


/*static*/ pascal void st_scheduler::task_entry(EventLoopTimerRef /*pTimer*/, void *pRefCon)
{
    st_scheduler *pThis = reinterpret_cast<st_scheduler *>(pRefCon);
    assert(pThis != NULL);
    pThis->task();
}

void st_scheduler::task()
{
    periodic_function();
}

#else
#    error st_scheduler unimplemented!
#endif


} // namespace detail

} // namespace mac

} // namespace threads

} // namespace boost