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| author | Björn-Egil Dahlberg <[email protected]> | 2011-04-14 20:23:39 +0200 |
|---|---|---|
| committer | Björn-Egil Dahlberg <[email protected]> | 2011-06-08 16:47:00 +0200 |
| commit | 3a975c8778ca5684596f0247e225544d0a96617e (patch) | |
| tree | 827556f08a7a81faed40a96b205ef228d77aa59b /erts/preloaded/src/prim_file.erl | |
| parent | 45f5b2719226fe60dd26dd23ce4c1f7f9ca9225b (diff) | |
| download | otp-3a975c8778ca5684596f0247e225544d0a96617e.tar.gz otp-3a975c8778ca5684596f0247e225544d0a96617e.tar.bz2 otp-3a975c8778ca5684596f0247e225544d0a96617e.zip | |
Teach prim_file:list_dir/1,2 to use fname chunks
The efile driver will now use chunked data on list_dir. This will
lessen the number of sends to prim_file and hence improve
performance. This method is utilized in both direct and async cases.
Diffstat (limited to 'erts/preloaded/src/prim_file.erl')
| -rw-r--r-- | erts/preloaded/src/prim_file.erl | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/erts/preloaded/src/prim_file.erl b/erts/preloaded/src/prim_file.erl index ac7570582e..b18a57bfef 100644 --- a/erts/preloaded/src/prim_file.erl +++ b/erts/preloaded/src/prim_file.erl @@ -111,6 +111,7 @@ -define(FILE_RESP_EOF, 8). -define(FILE_RESP_FNAME, 9). -define(FILE_RESP_ALL_DATA, 10). +-define(FILE_RESP_LFNAME, 11). %% Open modes for the driver's open function. -define(EFILE_MODE_READ, 1). @@ -914,6 +915,8 @@ drv_get_response(Port, R) when is_list(R) -> {ok, R}; {ok, Name} -> drv_get_response(Port, [Name|R]); + {append, Names} -> + drv_get_response(Port, append(Names, R)); Error -> Error end; @@ -938,6 +941,8 @@ drv_get_response(Port) -> %%%----------------------------------------------------------------- %%% Utility functions. +append([I | Is], R) when is_list(R) -> append(Is, [I | R]); +append([], R) -> R. %% Converts a list of mode atoms into an mode word for the driver. @@ -1067,7 +1072,7 @@ translate_response(?FILE_RESP_N2DATA, {ok, {Size, Offset, D}}; translate_response(?FILE_RESP_N2DATA = X, L0) when is_list(L0) -> {Offset, L1} = get_uint64(L0), - {ReadSize, L2} = get_uint64(L1), + {ReadSize, L2} = get_uint64(L1), {Size, L3} = get_uint64(L2), case {ReadSize, L3} of {0, []} -> @@ -1087,6 +1092,12 @@ translate_response(?FILE_RESP_FNAME, Data) when is_binary(Data) -> {ok, prim_file:internal_native2name(Data)}; translate_response(?FILE_RESP_FNAME, Data) -> {ok, Data}; +translate_response(?FILE_RESP_LFNAME, []) -> + ok; +translate_response(?FILE_RESP_LFNAME, Data) when is_binary(Data) -> + {append, transform_lfname(Data)}; +translate_response(?FILE_RESP_LFNAME, Data) -> + {append, transform_lfname(Data)}; translate_response(?FILE_RESP_ALL_DATA, Data) -> {ok, Data}; translate_response(X, Data) -> @@ -1199,6 +1210,14 @@ transform_ldata(0, List, [Size | Sizes], R) -> {Front, Rear} = lists_split(List, Size), transform_ldata(0, Rear, Sizes, [Front | R]). +transform_lfname(<<>>) -> []; +transform_lfname(<<L:16, Name:L/binary, Names/binary>>) -> + [ prim_file:internal_native2name(Name) | transform_lfname(Names)]; +transform_lfname([]) -> []; +transform_lfname([L1,L2|Names]) -> + L = (L1 bsl 8) bor L2, + {Name, Rest} = lists_split(Names, L), + [Name | transform_lfname(Rest)]. lists_split(List, 0) when is_list(List) -> |