FreeRTOS-Kernel/FreeRTOS/Demo/Posix_GCC/console.c

/*
 * FreeRTOS Kernel V10.4.1
 * Copyright (C) 2020 Cambridge Consultants Ltd.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 * http://www.FreeRTOS.org
 * http://aws.amazon.com/freertos
 *
 * 1 tab == 4 spaces!
 */

/*-----------------------------------------------------------
 * Example console I/O wrappers.
 *----------------------------------------------------------*/

#include <stdarg.h>
#include <stdio.h>

#include <FreeRTOS.h>
#include <semphr.h>

SemaphoreHandle_t xStdioMutex;
StaticSemaphore_t xStdioMutexBuffer;

void console_init(void)
{
    xStdioMutex = xSemaphoreCreateMutexStatic(&xStdioMutexBuffer);
}

void console_print(const char *fmt, ...)
{
    va_list vargs;

    va_start(vargs, fmt);
    
    xSemaphoreTake(xStdioMutex, portMAX_DELAY);

    vprintf(fmt, vargs);

    xSemaphoreGive(xStdioMutex);

    va_end(vargs);
}