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| author | Vic (Chun-Ju) Yang <victoryang@chromium.org> | 2013-12-23 16:15:14 +0800 |
|---|---|---|
| committer | chrome-internal-fetch <chrome-internal-fetch@google.com> | 2013-12-27 07:50:47 +0000 |
| commit | 4e7e33f6e7fe114ef94b5e068d723f621e54e5ab (patch) | |
| tree | 4110e0c2945e210d1f08967e426cce91a573c44b /test/stress.c | |
| parent | 1b1d2e999c7349e896121abec9515270a76072f9 (diff) | |
| download | chrome-ec-4e7e33f6e7fe114ef94b5e068d723f621e54e5ab.tar.gz | |
Move pseudo random number generator to common
We have three copies of the same pseudo random number generator in our
test codes. Let's consolidate them into a single copy in test_util.
BUG=chrome-os-partner:19235
TEST=Pass all tests
BRANCH=None
Change-Id: I7ea0b3476f3cfe6944855f19861e3c86af35807e
Signed-off-by: Vic (Chun-Ju) Yang <victoryang@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/181085
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
Diffstat (limited to 'test/stress.c')
| -rw-r--r-- | test/stress.c | 12 |
1 files changed, 2 insertions, 10 deletions
diff --git a/test/stress.c b/test/stress.c index a51ab416eb..8712fda129 100644 --- a/test/stress.c +++ b/test/stress.c @@ -57,16 +57,8 @@ struct i2c_test_param_t { /*****************************************************************************/ /* Test utilities */ -/* Linear congruential pseudo random number generator*/ -static uint32_t prng(void) -{ - static uint32_t x = 1357; - x = 22695477 * x + 1; - return x; -} - /* period between 500us and 32ms */ -#define RAND_US() (((prng() % 64) + 1) * 500) +#define RAND_US() (((prng_no_seed() % 64) + 1) * 500) static int stress(const char *name, int (*test_routine)(void), @@ -103,7 +95,7 @@ static int test_i2c(void) int res = EC_ERROR_UNKNOWN; int dummy_data; struct i2c_test_param_t *param; - param = i2c_test_params + (prng() % (sizeof(i2c_test_params) / + param = i2c_test_params + (prng_no_seed() % (sizeof(i2c_test_params) / sizeof(struct i2c_test_param_t))); if (param->width == 8 && param->data == -1) res = i2c_read8(param->port, param->addr, |