rt-thread/examples/file/readspeed.c

65 lines
1.4 KiB
C

/*
* File : readspeed.c
* This file is part of RT-TestCase in RT-Thread RTOS
* COPYRIGHT (C) 2010, RT-Thread Development Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2010-02-10 Bernard first version
*/
#include <rtthread.h>
#include <dfs_posix.h>
void readspeed(const char* filename, int block_size)
{
int fd;
char *buff_ptr;
rt_size_t total_length;
rt_tick_t tick;
fd = open(filename, 0, O_RDONLY);
if (fd < 0)
{
rt_kprintf("open file:%s failed\n", filename);
return;
}
buff_ptr = rt_malloc(block_size);
if (buff_ptr == RT_NULL)
{
rt_kprintf("no memory\n");
close(fd);
return;
}
tick = rt_tick_get();
total_length = 0;
while (1)
{
int length;
length = read(fd, buff_ptr, block_size);
if (length <= 0) break;
total_length += length;
}
tick = rt_tick_get() - tick;
/* close file and release memory */
close(fd);
rt_free(buff_ptr);
/* calculate read speed */
rt_kprintf("File read speed: %d byte/s\n", total_length /tick * RT_TICK_PER_SECOND);
}
#ifdef RT_USING_FINSH
#include <finsh.h>
FINSH_FUNCTION_EXPORT(readspeed, perform file read test);
#endif