diff options
Diffstat (limited to 'samples/kfifo/inttype-example.c')
| -rw-r--r-- | samples/kfifo/inttype-example.c | 43 |
1 files changed, 35 insertions, 8 deletions
diff --git a/samples/kfifo/inttype-example.c b/samples/kfifo/inttype-example.c index d6c5b7d9df6..71b2aabca96 100644 --- a/samples/kfifo/inttype-example.c +++ b/samples/kfifo/inttype-example.c @@ -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 |