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-rw-r--r--lib/kernel/src/application.erl16
-rw-r--r--lib/kernel/src/file.erl14
-rw-r--r--lib/kernel/src/file_io_server.erl4
-rw-r--r--lib/kernel/src/ram_file.erl7
4 files changed, 39 insertions, 2 deletions
diff --git a/lib/kernel/src/application.erl b/lib/kernel/src/application.erl
index 9b7c4aa7b8..4e65883be7 100644
--- a/lib/kernel/src/application.erl
+++ b/lib/kernel/src/application.erl
@@ -23,7 +23,7 @@
which_applications/0, which_applications/1,
loaded_applications/0, permit/2]).
-export([set_env/3, set_env/4, unset_env/2, unset_env/3]).
--export([get_env/1, get_env/2, get_all_env/0, get_all_env/1]).
+-export([get_env/1, get_env/2, get_env/3, get_all_env/0, get_all_env/1]).
-export([get_key/1, get_key/2, get_all_key/0, get_all_key/1]).
-export([get_application/0, get_application/1, info/0]).
-export([start_type/0]).
@@ -264,6 +264,20 @@ get_env(Key) ->
get_env(Application, Key) ->
application_controller:get_env(Application, Key).
+-spec get_env(Application, Par, Def) -> Val when
+ Application :: atom(),
+ Par :: atom(),
+ Def :: term(),
+ Val :: term().
+
+get_env(Application, Key, Def) ->
+ case get_env(Application, Key) of
+ {ok, Val} ->
+ Val;
+ undefined ->
+ Def
+ end.
+
-spec get_all_env() -> Env when
Env :: [{Par :: atom(), Val :: term()}].
diff --git a/lib/kernel/src/file.erl b/lib/kernel/src/file.erl
index de3eaad5a1..16f2dde464 100644
--- a/lib/kernel/src/file.erl
+++ b/lib/kernel/src/file.erl
@@ -38,7 +38,7 @@
%% Specialized
-export([ipread_s32bu_p32bu/3]).
%% Generic file contents.
--export([open/2, close/1, advise/4,
+-export([open/2, close/1, advise/4, allocate/3,
read/2, write/2,
pread/2, pread/3, pwrite/2, pwrite/3,
read_line/1,
@@ -490,6 +490,18 @@ advise(#file_descriptor{module = Module} = Handle, Offset, Length, Advise) ->
advise(_, _, _, _) ->
{error, badarg}.
+-spec allocate(File, Offset, Length) ->
+ 'ok' | {'error', posix()} when
+ File :: io_device(),
+ Offset :: non_neg_integer(),
+ Length :: non_neg_integer().
+
+allocate(File, Offset, Length) when is_pid(File) ->
+ R = file_request(File, {allocate, Offset, Length}),
+ wait_file_reply(File, R);
+allocate(#file_descriptor{module = Module} = Handle, Offset, Length) ->
+ Module:allocate(Handle, Offset, Length).
+
-spec read(IoDevice, Number) -> {ok, Data} | eof | {error, Reason} when
IoDevice :: io_device() | atom(),
Number :: non_neg_integer(),
diff --git a/lib/kernel/src/file_io_server.erl b/lib/kernel/src/file_io_server.erl
index acaffe1e41..fad2ed7fb3 100644
--- a/lib/kernel/src/file_io_server.erl
+++ b/lib/kernel/src/file_io_server.erl
@@ -211,6 +211,10 @@ file_request({advise,Offset,Length,Advise},
Reply ->
{reply,Reply,State}
end;
+file_request({allocate, Offset, Length},
+ #state{handle = Handle} = State) ->
+ Reply = ?PRIM_FILE:allocate(Handle, Offset, Length),
+ {reply, Reply, State};
file_request({pread,At,Sz},
#state{handle=Handle,buf=Buf,read_mode=ReadMode}=State) ->
case position(Handle, At, Buf) of
diff --git a/lib/kernel/src/ram_file.erl b/lib/kernel/src/ram_file.erl
index 48ea871433..ca881ff8a4 100644
--- a/lib/kernel/src/ram_file.erl
+++ b/lib/kernel/src/ram_file.erl
@@ -29,6 +29,7 @@
%% Specialized file operations
-export([get_size/1, get_file/1, set_file/2, get_file_close/1]).
-export([compress/1, uncompress/1, uuencode/1, uudecode/1, advise/4]).
+-export([allocate/3]).
-export([open_mode/1]). %% used by ftp-file
@@ -72,6 +73,7 @@
-define(RAM_FILE_UUDECODE, 36).
-define(RAM_FILE_SIZE, 37).
-define(RAM_FILE_ADVISE, 38).
+-define(RAM_FILE_ALLOCATE, 39).
%% Open modes for RAM_FILE_OPEN
-define(RAM_FILE_MODE_READ, 1).
@@ -383,6 +385,11 @@ advise(#file_descriptor{module = ?MODULE, data = Port}, Offset,
advise(#file_descriptor{}, _Offset, _Length, _Advise) ->
{error, enotsup}.
+allocate(#file_descriptor{module = ?MODULE, data = Port}, Offset, Length) ->
+ call_port(Port, <<?RAM_FILE_ALLOCATE, Offset:64/signed, Length:64/signed>>);
+allocate(#file_descriptor{}, _Offset, _Length) ->
+ {error, enotsup}.
+
%%%-----------------------------------------------------------------