diff options
Diffstat (limited to 'samples/kfifo/record-example.c')
| -rw-r--r-- | samples/kfifo/record-example.c | 39 |
1 files changed, 36 insertions, 3 deletions
diff --git a/samples/kfifo/record-example.c b/samples/kfifo/record-example.c index 32c6e0bda744..e68bd16a5da4 100644 --- a/samples/kfifo/record-example.c +++ b/samples/kfifo/record-example.c @@ -55,6 +55,19 @@ typedef STRUCT_KFIFO_REC_1(FIFO_SIZE) mytest; static mytest test; #endif +static const char *expected_result[] = { + "a", + "bb", + "ccc", + "dddd", + "eeeee", + "ffffff", + "ggggggg", + "hhhhhhhh", + "iiiiiiiii", + "jjjjjjjjjj", +}; + static int __init testfunc(void) { char buf[100]; @@ -75,6 +88,10 @@ static int __init testfunc(void) kfifo_in(&test, buf, i + 1); } + /* skip first element of the fifo */ + printk(KERN_INFO "skip 1st element\n"); + kfifo_skip(&test); + printk(KERN_INFO "fifo len: %u\n", kfifo_len(&test)); /* show the first record without removing from the fifo */ @@ -82,11 +99,22 @@ static int __init testfunc(void) if (ret) printk(KERN_INFO "%.*s\n", ret, buf); - /* print out all records in the fifo */ + /* check the correctness of all values in the fifo */ + i = 0; while (!kfifo_is_empty(&test)) { ret = kfifo_out(&test, buf, sizeof(buf)); - printk(KERN_INFO "%.*s\n", ret, buf); + buf[ret] = '\0'; + printk(KERN_INFO "item = %.*s\n", ret, buf); + if (strcmp(buf, expected_result[i++])) { + printk(KERN_WARNING "value mismatch: test failed\n"); + return -EIO; + } + } + if (i != ARRAY_SIZE(expected_result)) { + printk(KERN_WARNING "size mismatch: test failed\n"); + return -EIO; } + printk(KERN_INFO "test passed\n"); return 0; } @@ -142,7 +170,12 @@ static int __init example_init(void) #else INIT_KFIFO(test); #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 |