Exemplos de create_signal_fds em C++ (Cpp)

Exemplo n.º 1

Arquivo: userial.c Projeto: IllusionRom-deprecated/android_platform_external_bluetooth_bluedroid

/*******************************************************************************
**
** Function        select_read
**
** Description     check if fd is ready for reading and listen for termination
**                  signal. need to use select in order to avoid collision
**                  between read and close on the same fd
**
** Returns         -1: termination
**                 >=0: numbers of bytes read back from fd
**
*******************************************************************************/
static int select_read(int fd, uint8_t *pbuf, int len)
{
    fd_set input;
    int n = 0, ret = -1;
    char reason = 0;

    while (userial_running)
    {
        /* Initialize the input fd set */
        FD_ZERO(&input);
        if (rx_flow_on == TRUE)
        {
            FD_SET(fd, &input);
        }
        int fd_max = create_signal_fds(&input);
        fd_max = fd_max > fd ? fd_max : fd;

        /* Do the select */
        n = select(fd_max+1, &input, NULL, NULL, NULL);
        if(is_signaled(&input))
        {
            reason = reset_signal();
            if (reason == USERIAL_RX_EXIT)
            {
                USERIALDBG("RX termination");
                return -1;
            }
            else if (reason == USERIAL_RX_FLOW_OFF)
            {
                USERIALDBG("RX flow OFF");
                rx_flow_on = FALSE;
            }
            else if (reason == USERIAL_RX_FLOW_ON)
            {
                USERIALDBG("RX flow ON");
                rx_flow_on = TRUE;
            }
        }

        if (n > 0)
        {
            /* We might have input */
            if (FD_ISSET(fd, &input))
            {
                ret = read(fd, pbuf, (size_t)len);
                if (0 == ret)
                    ALOGW( "read() returned 0!" );

                return ret;
            }
        }
        else if (n < 0)
            ALOGW( "select() Failed");
        else if (n == 0)
            ALOGW( "Got a select() TIMEOUT");

    }

    return ret;
}

Exemplo n.º 2

Arquivo: userial_mct.c Projeto: Android4SAM/platform_external_bluetooth_bluedroid

/*******************************************************************************
**
** Function        userial_evt_read_thread
**
** Description     The reading thread on EVT and ACL_IN channels
**
** Returns         void *
**
*******************************************************************************/
static void *userial_read_thread(void *arg)
{
    fd_set input;
    int n;
    char reason = 0;

    USERIALDBG("Entering userial_read_thread()");

    rx_flow_on = TRUE;
    userial_running = 1;

    raise_priority_a2dp(TASK_HIGH_USERIAL_READ);

    while (userial_running)
    {
        /* Initialize the input fd set */
        FD_ZERO(&input);
        if (rx_flow_on == TRUE)
        {
            FD_SET(userial_cb.fd[CH_EVT], &input);
            FD_SET(userial_cb.fd[CH_ACL_IN], &input);
        }

        int fd_max = create_signal_fds(&input);
        fd_max = (fd_max>userial_cb.fd[CH_EVT]) ? fd_max : userial_cb.fd[CH_EVT];
        fd_max = (fd_max>userial_cb.fd[CH_ACL_IN]) ? fd_max : userial_cb.fd[CH_ACL_IN];

        /* Do the select */
        n = 0;
        n = select(fd_max+1, &input, NULL, NULL, NULL);
        if(is_signaled(&input))
        {
            reason = reset_signal();
            if (reason == USERIAL_RX_EXIT)
            {
                ALOGI("exiting userial_read_thread");
                userial_running = 0;
                break;
            }
            else if (reason == USERIAL_RX_FLOW_OFF)
            {
                USERIALDBG("RX flow OFF");
                rx_flow_on = FALSE;
            }
            else if (reason == USERIAL_RX_FLOW_ON)
            {
                USERIALDBG("RX flow ON");
                rx_flow_on = TRUE;
            }
        }

        if (n > 0)
        {
            /* We might have input */
            if (FD_ISSET(userial_cb.fd[CH_EVT], &input))
            {
                hci_mct_receive_evt_msg();
            }

            if (FD_ISSET(userial_cb.fd[CH_ACL_IN], &input))
            {
                hci_mct_receive_acl_msg();
            }
        }
        else if (n < 0)
            ALOGW( "select() Failed");
        else if (n == 0)
            ALOGW( "Got a select() TIMEOUT");
    } /* while */

    userial_running = 0;
    USERIALDBG("Leaving userial_evt_read_thread()");
    pthread_exit(NULL);

    return NULL;    // Compiler friendly
}