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https://github.com/RIOT-OS/RIOT.git
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bfe42ad20a
The real_read() function will block the thread but won't preempt it. That means all other thereads on the same (or higher) priority level are blocked as RIOT still consideres the thread that called stdio_read() as running. Use async_read/isrpipe to properly block the thread when reading from stdin.
54 lines
1.2 KiB
C
54 lines
1.2 KiB
C
/*
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* Copyright (C) 2019 Freie Universität Berlin
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @file
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* @author Martine S. Lenders <m.lenders@fu-berlin.de>
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*/
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#include "async_read.h"
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#include "kernel_defines.h"
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#include "native_internal.h"
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#include "isrpipe.h"
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#include "stdio_base.h"
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#ifndef STDIO_NATIVE_RX_BUFSIZE
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#define STDIO_NATIVE_RX_BUFSIZE (64)
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#endif
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static uint8_t _rx_buf_mem[STDIO_NATIVE_RX_BUFSIZE];
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static isrpipe_t stdio_isrpipe = ISRPIPE_INIT(_rx_buf_mem);
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static void _async_read_wrapper(int fd, void *arg) {
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uint8_t buf[1];
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int res = real_read(fd, &buf, sizeof(buf));
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if (res > 0) {
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isrpipe_write(arg, buf, res);
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}
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native_async_read_continue(fd);
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}
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void stdio_init(void)
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{
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native_async_read_setup();
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native_async_read_add_int_handler(STDIN_FILENO, &stdio_isrpipe, _async_read_wrapper);
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}
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ssize_t stdio_read(void* buffer, size_t max_len)
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{
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return (ssize_t)isrpipe_read(&stdio_isrpipe, buffer, max_len);
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}
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ssize_t stdio_write(const void* buffer, size_t len)
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{
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return real_write(STDOUT_FILENO, buffer, len);
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}
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