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author | Sverker Eriksson <[email protected]> | 2017-02-03 17:01:52 +0100 |
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committer | Sverker Eriksson <[email protected]> | 2017-02-03 17:01:52 +0100 |
commit | 69b928b12d9206d00879c08e46143f599f9dc34e (patch) | |
tree | fde8905a6ca71c797725a33895321c67e81c3645 /erts/emulator/beam/index.h | |
parent | 4b97d656a9e1774fd4ff984014f085ad661a4fdb (diff) | |
parent | 1923315e618bea9fb23fc3237541f95a0accc266 (diff) | |
download | otp-69b928b12d9206d00879c08e46143f599f9dc34e.tar.gz otp-69b928b12d9206d00879c08e46143f599f9dc34e.tar.bz2 otp-69b928b12d9206d00879c08e46143f599f9dc34e.zip |
Merge branch 'master' into sverker/enif_select
Diffstat (limited to 'erts/emulator/beam/index.h')
-rw-r--r-- | erts/emulator/beam/index.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/erts/emulator/beam/index.h b/erts/emulator/beam/index.h index b2e3c0eab5..10f5d1eb39 100644 --- a/erts/emulator/beam/index.h +++ b/erts/emulator/beam/index.h @@ -65,6 +65,7 @@ void index_erase_latest_from(IndexTable*, Uint ix); ERTS_GLB_INLINE int index_put(IndexTable*, void*); ERTS_GLB_INLINE IndexSlot* erts_index_lookup(IndexTable*, Uint); +ERTS_GLB_INLINE int erts_index_num_entries(IndexTable* t); #if ERTS_GLB_INLINE_INCL_FUNC_DEF @@ -78,6 +79,19 @@ erts_index_lookup(IndexTable* t, Uint ix) { return t->seg_table[ix>>INDEX_PAGE_SHIFT][ix&INDEX_PAGE_MASK]; } + +ERTS_GLB_INLINE int erts_index_num_entries(IndexTable* t) +{ + int ret = t->entries; + /* + * Do a read barrier here to allow lock free iteration + * on tables where entries are never erased. + * index_put_entry() does matching write barrier. + */ + ERTS_SMP_READ_MEMORY_BARRIER; + return ret; +} + #endif #endif |