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event_listener_unix.cpp

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#include "Core/precomp.h"
#include "event_listener_unix.h"
#include "event_trigger_unix.h"
#include "API/Core/System/system.h"

#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>

// CL_EventListener_Unix construction:

CL_EventListener_Unix::CL_EventListener_Unix(CL_EventListener *owner)
:
        CL_EventListener_Generic(owner)
{
}

CL_EventListener_Unix::~CL_EventListener_Unix()
{
}

// CL_EventListener_Unix implementation:

bool CL_EventListener_Unix::wait(int timeout)
{
        if (triggers.empty()) // no triggers, just do the sleep.
        {
                CL_System::sleep(timeout);
                return false;
        }

        fd_set rfds;
        FD_ZERO(&rfds);
        int highest_fd = -1;

        std::list<CL_EventTrigger_Generic *>::iterator it;
        for (it = triggers.begin(); it != triggers.end(); it++)
        {
                CL_EventTrigger_Unix *trigger = static_cast<CL_EventTrigger_Unix*>(*it);
                
                if (trigger->wait_pipe[0] > highest_fd) highest_fd = trigger->wait_pipe[0];
                FD_SET(trigger->wait_pipe[0], &rfds);
        }
        
        timeval tv;
        tv.tv_sec = 0;
        tv.tv_usec = timeout;

        int result = select(
                highest_fd+1,
                &rfds,
                NULL,
                NULL,
                (timeout == 1) ? NULL : &tv);

        if (result <= 0) return false;
        return true;
}

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