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Viewing changes to uspace/drv/char/omap_uart/omap_uart.c

  • Committer: Maurizio Lombardi
  • Date: 2013-09-11 20:06:35 UTC
  • Revision ID: m.lombardi85@gmail.com-20130911200635-4p9se11fvxgcbv7h
omap_uart: drop old data in case of buffer overflow

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Lines of Context:
uspace/drv/char/omap_uart/omap_uart.c
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{
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        omap_uart_t *uart = dev_omap_uart(dev);
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        uint32_t recv = (uint32_t) IPC_GET_ARG1(*icall);
 
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        uint8_t recv = (uint8_t) IPC_GET_ARG1(*icall);
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        omap_uart_putchar(uart, (uint8_t) recv);
 
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        omap_uart_putchar(uart, recv);
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        fibril_mutex_lock(&uart->mutex);
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        bool const buf_was_empty = buf_is_empty(&uart->buffer);
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        if (!buf_push_back(&uart->buffer, (uint8_t) recv)) {
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                /* Buffer overflow */
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                ddf_msg(LVL_WARN, "buffer overflow on device %s.",
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                    ddf_dev_get_name(dev));
 
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        if (!buf_push_back(&uart->buffer, recv)) {
 
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                /* Buffer overflow, drop the oldest data */
 
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                buf_pop_front(&uart->buffer);
 
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                /* Must not fail */
 
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                assert(buf_push_back(&uart->buffer, recv));
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        }
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        if (buf_was_empty)