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| author | Nick Mathewson <nickm@torproject.org> | 2019-02-20 12:21:05 -0500 |
|---|---|---|
| committer | Nick Mathewson <nickm@torproject.org> | 2019-02-20 12:21:05 -0500 |
| commit | 97b9dfe3052f1fe3b14f47fc1326e235f96305b7 (patch) | |
| tree | 148edc114c2f53e04e134f79394a72c4e6dc589e /src/lib/crypt_ops | |
| parent | 208f04e9b8241569fe314f6d5cb65521c9b55d8b (diff) | |
| download | tor-97b9dfe3052f1fe3b14f47fc1326e235f96305b7.tar.gz tor-97b9dfe3052f1fe3b14f47fc1326e235f96305b7.zip | |
Add a convenience macro to get a fast one-in-n calculation
Diffstat (limited to 'src/lib/crypt_ops')
| -rw-r--r-- | src/lib/crypt_ops/crypto_rand.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/lib/crypt_ops/crypto_rand.h b/src/lib/crypt_ops/crypto_rand.h index 6eef22ed4d..bb424fd691 100644 --- a/src/lib/crypt_ops/crypto_rand.h +++ b/src/lib/crypt_ops/crypto_rand.h @@ -68,6 +68,9 @@ unsigned crypto_fast_rng_get_uint(crypto_fast_rng_t *rng, unsigned limit); uint64_t crypto_fast_rng_get_uint64(crypto_fast_rng_t *rng, uint64_t limit); double crypto_fast_rng_get_double(crypto_fast_rng_t *rng); +#define crypto_fast_rng_one_in_n(rng, n) \ + (0 == (crypto_fast_rng_get_uint((rng), (n)))) + crypto_fast_rng_t *get_thread_fast_rng(void); #ifdef CRYPTO_PRIVATE |