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| author | Ulf Wiger <[email protected]> | 2010-12-09 18:14:15 +0100 |
|---|---|---|
| committer | Henrik Nord <[email protected]> | 2011-05-16 11:00:28 +0200 |
| commit | 38eef7af0f8bc1d2d152cefb8df1e1303ddcac45 (patch) | |
| tree | d9c59098037eafa221a08efaa085933e8915c127 /lib/mnesia/src/mnesia_lib.erl | |
| parent | 6d446fc5d08d56174a79ab546d5aa2e79277af06 (diff) | |
| download | otp-38eef7af0f8bc1d2d152cefb8df1e1303ddcac45.tar.gz otp-38eef7af0f8bc1d2d152cefb8df1e1303ddcac45.tar.bz2 otp-38eef7af0f8bc1d2d152cefb8df1e1303ddcac45.zip | |
Write locks now check majority when needed.
Since the table loader also sets (table) write locks, a special
lock type, 'load', was needed. Unfortunately, this affects mnesia
activity callbacks that redefine the lock operation.
Diffstat (limited to 'lib/mnesia/src/mnesia_lib.erl')
| -rw-r--r-- | lib/mnesia/src/mnesia_lib.erl | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/lib/mnesia/src/mnesia_lib.erl b/lib/mnesia/src/mnesia_lib.erl index 36bcfe8de9..7e926a6258 100644 --- a/lib/mnesia/src/mnesia_lib.erl +++ b/lib/mnesia/src/mnesia_lib.erl @@ -96,6 +96,8 @@ exists/1, fatal/2, get_node_number/0, + have_majority/2, + have_majority/3, fix_error/1, important/2, incr_counter/1, @@ -660,6 +662,14 @@ proc_info(_) -> false. get_node_number() -> {node(), self()}. +have_majority(Tab, HaveNodes) -> + have_majority(Tab, val({Tab, all_nodes}), HaveNodes). + +have_majority(_Tab, AllNodes, HaveNodes) -> + Missing = AllNodes -- HaveNodes, + Present = AllNodes -- Missing, + length(Present) > length(Missing). + read_log_files() -> [{F, catch file:read_file(F)} || F <- mnesia_log:log_files()]. |