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update file example.

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git-svn-id: https://rt-thread.googlecode.com/svn/trunk@408 bbd45198-f89e-11dd-88c7-29a3b14d5316
This commit is contained in:
bernard.xiong
2010-02-11 15:59:25 +00:00
parent 2f3882c714
commit 3c831420de
4 changed files with 111 additions and 7 deletions
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examples/file/writespeed.c
+19 -3
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@@ -16,11 +16,11 @@
void writespeed(const char* filename, int total_length, int block_size)
{
int fd;
int fd, index, length;
char *buff_ptr;
rt_tick_t tick;
fd = open(filename, 0, O_WRONLY);
fd = open(filename, O_WRONLY | O_WRONLY | O_TRUNC, 0);
if (fd < 0)
{
rt_kprintf("open file:%s failed\n", filename);
@@ -37,9 +37,25 @@ void writespeed(const char* filename, int total_length, int block_size)
}
/* prepare write data */
for (index = 0; index < block_size; index++)
{
buff_ptr[index] = index;
}
index = 0;
/* get the beginning tick */
tick = rt_tick_get();
while (index < total_length / block_size)
{
length = write(fd, buff_ptr, block_size);
if (length != block_size)
{
rt_kprintf("write failed\n");
break;
}
index ++;
}
tick = rt_tick_get() - tick;
/* close file and release memory */