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| author | Sverker Eriksson <[email protected]> | 2016-06-01 16:19:04 +0200 |
|---|---|---|
| committer | Sverker Eriksson <[email protected]> | 2016-06-01 19:41:29 +0200 |
| commit | f4bdac18cb9dd45185e911308a5ebd95ff10d7fd (patch) | |
| tree | ac77d8cd5da21355173457acfab334b300c270d6 /erts/emulator/beam/erl_db_hash.c | |
| parent | 7c133fb1094ad1cabbb5cfc157483a43c816c6a9 (diff) | |
| download | otp-f4bdac18cb9dd45185e911308a5ebd95ff10d7fd.tar.gz otp-f4bdac18cb9dd45185e911308a5ebd95ff10d7fd.tar.bz2 otp-f4bdac18cb9dd45185e911308a5ebd95ff10d7fd.zip | |
erts: Remove unnecessary access of 'is_resizing'
in tables without write_concurrency
and remove it totally #ifndef ERTS_SMP
Diffstat (limited to 'erts/emulator/beam/erl_db_hash.c')
| -rw-r--r-- | erts/emulator/beam/erl_db_hash.c | 21 |
1 files changed, 10 insertions, 11 deletions
diff --git a/erts/emulator/beam/erl_db_hash.c b/erts/emulator/beam/erl_db_hash.c index 4c4ff9b470..074ac6d64e 100644 --- a/erts/emulator/beam/erl_db_hash.c +++ b/erts/emulator/beam/erl_db_hash.c @@ -671,8 +671,8 @@ int db_create_hash(Process *p, DbTable *tbl) tb->nsegs = NSEG_1; tb->nslots = SEGSZ; - erts_smp_atomic_init_nob(&tb->is_resizing, 0); #ifdef ERTS_SMP + erts_smp_atomic_init_nob(&tb->is_resizing, 0); if (tb->common.type & DB_FINE_LOCKED) { erts_smp_rwmtx_opt_t rwmtx_opt = ERTS_SMP_RWMTX_OPT_DEFAULT_INITER; int i; @@ -2605,23 +2605,22 @@ static Eterm build_term_list(Process* p, HashDbTerm* ptr1, HashDbTerm* ptr2, static ERTS_INLINE int begin_resizing(DbTableHash* tb) { +#ifdef ERTS_SMP if (DB_USING_FINE_LOCKING(tb)) - return !erts_smp_atomic_xchg_acqb(&tb->is_resizing, 1); - else { - if (erts_smp_atomic_read_nob(&tb->is_resizing)) - return 0; - erts_smp_atomic_set_nob(&tb->is_resizing, 1); - return 1; - } + return !erts_atomic_xchg_acqb(&tb->is_resizing, 1); + else + ERTS_LC_ASSERT(erts_lc_rwmtx_is_rwlocked(&tb->common.rwlock)); +#endif + return 1; } static ERTS_INLINE void done_resizing(DbTableHash* tb) { +#ifdef ERTS_SMP if (DB_USING_FINE_LOCKING(tb)) - erts_smp_atomic_set_relb(&tb->is_resizing, 0); - else - erts_smp_atomic_set_nob(&tb->is_resizing, 0); + erts_atomic_set_relb(&tb->is_resizing, 0); +#endif } /* Grow table with one new bucket. |