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kfifo: add explicit error checking in all the examples

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Provide a check in all the kfifo examples to validate the correct
execution of each testcase.

Signed-off-by: Andrea Righi <arighi@develer.com>
Acked-by: Stefani Seibold <stefani@seibold.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Andrea Righi
2010-08-19 14:13:30 -07:00
committed by Linus Torvalds
parent d83a71c421
commit a25effa4d2
4 changed files with 152 additions and 59 deletions
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43
samples/kfifo/inttype-example.c
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@ -44,10 +44,17 @@ static DECLARE_KFIFO_PTR(test, int);
static DEFINE_KFIFO(test, int, FIFO_SIZE);
#endif
static const int expected_result[FIFO_SIZE] = {
3, 4, 5, 6, 7, 8, 9, 0,
1, 20, 21, 22, 23, 24, 25, 26,
27, 28, 29, 30, 31, 32, 33, 34,
35, 36, 37, 38, 39, 40, 41, 42,
};
static int __init testfunc(void)
{
int buf[6];
int i;
int i, j;
unsigned int ret;
printk(KERN_INFO "int fifo test start\n");
@ -66,8 +73,13 @@ static int __init testfunc(void)
ret = kfifo_in(&test, buf, ret);
printk(KERN_INFO "ret: %d\n", ret);
for (i = 20; i != 30; i++)
kfifo_put(&test, &i);
/* skip first element of the fifo */
printk(KERN_INFO "skip 1st element\n");
kfifo_skip(&test);
/* put values into the fifo until is full */
for (i = 20; kfifo_put(&test, &i); i++)
;
printk(KERN_INFO "queue len: %u\n", kfifo_len(&test));
@ -75,10 +87,20 @@ static int __init testfunc(void)
if (kfifo_peek(&test, &i))
printk(KERN_INFO "%d\n", i);
/* print out all values in the fifo */
while (kfifo_get(&test, &i))
printk("%d ", i);
printk("\n");
/* check the correctness of all values in the fifo */
j = 0;
while (kfifo_get(&test, &i)) {
printk(KERN_INFO "item = %d\n", i);
if (i != expected_result[j++]) {
printk(KERN_WARNING "value mismatch: test failed\n");
return -EIO;
}
}
if (j != ARRAY_SIZE(expected_result)) {
printk(KERN_WARNING "size mismatch: test failed\n");
return -EIO;
}
printk(KERN_INFO "test passed\n");
return 0;
}
@ -132,7 +154,12 @@ static int __init example_init(void)
return ret;
}
#endif
testfunc();
if (testfunc() < 0) {
#ifdef DYNAMIC
kfifo_free(&test);
#endif
return -EIO;
}
if (proc_create(PROC_FIFO, 0, NULL, &fifo_fops) == NULL) {
#ifdef DYNAMIC