diff options
| author | Guilherme Andrade <[email protected]> | 2017-04-19 00:43:37 +0100 |
|---|---|---|
| committer | Guilherme Andrade <[email protected]> | 2017-04-19 01:25:35 +0100 |
| commit | 0835f40ae25f97360dc393928796387d3cd6b16e (patch) | |
| tree | 22b56cc3a6cb90d79efb394ecd1fab58e1182f8c /erts/emulator/beam/utils.c | |
| parent | 6124bfc9b61227a5e82f1d7273d0895e909aac6e (diff) | |
| download | otp-0835f40ae25f97360dc393928796387d3cd6b16e.tar.gz otp-0835f40ae25f97360dc393928796387d3cd6b16e.tar.bz2 otp-0835f40ae25f97360dc393928796387d3cd6b16e.zip | |
erts: Add enif_phash2 and enif_phash2_ranged
These allow one to hash VM terms from NIF code.
Diffstat (limited to 'erts/emulator/beam/utils.c')
| -rw-r--r-- | erts/emulator/beam/utils.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/erts/emulator/beam/utils.c b/erts/emulator/beam/utils.c index 8f3f48f38f..72c59b33c6 100644 --- a/erts/emulator/beam/utils.c +++ b/erts/emulator/beam/utils.c @@ -1552,6 +1552,16 @@ make_hash2(Eterm term) } } +Uint32 +make_hash2_within_range(Eterm term, Uint32 range) +{ + Uint32 hash = make_hash2(term); + if (range) + return hash % range; /* [0..range-1] */ + else + return hash; /* Special case: 2**32 */ +} + /* Term hash function for internal use. * * Limitation #1: Is not "portable" in any way between different VM instances. |