diff options
Diffstat (limited to 'erts/emulator/beam/index.h')
| -rw-r--r-- | erts/emulator/beam/index.h | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/erts/emulator/beam/index.h b/erts/emulator/beam/index.h index 0a109d8699..6c07571df6 100644 --- a/erts/emulator/beam/index.h +++ b/erts/emulator/beam/index.h @@ -1,7 +1,7 @@ /* * %CopyrightBegin% * - * Copyright Ericsson AB 1996-2016. All Rights Reserved. + * Copyright Ericsson AB 1996-2017. All Rights Reserved. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. @@ -51,7 +51,7 @@ typedef struct index_table #define INDEX_PAGE_MASK ((1 << INDEX_PAGE_SHIFT)-1) IndexTable *erts_index_init(ErtsAlcType_t,IndexTable*,char*,int,int,HashFunctions); -void index_info(int, void *, IndexTable*); +void index_info(fmtfn_t, void *, IndexTable*); int index_table_sz(IndexTable *); int index_get(IndexTable*, void*); @@ -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 |