File 2202-erts-add-erlang-system_info-atom_count.patch of Package erlang
From ca7e946af9c2fdc86c1c74259ee7b6881c5aec1e Mon Sep 17 00:00:00 2001
From: Mikael Pettersson <mikpelinux@gmail.com>
Date: Mon, 19 Dec 2016 11:17:05 +0100
Subject: [PATCH] erts: add erlang:system_info(atom_count)
---
erts/doc/src/erlang.xml | 19 +++++++++++++------
erts/emulator/beam/erl_bif_info.c | 3 +++
erts/emulator/test/system_info_SUITE.erl | 15 +++++++++++++--
erts/preloaded/src/erlang.erl | 1 +
4 files changed, 30 insertions(+), 8 deletions(-)
diff --git a/erts/doc/src/erlang.xml b/erts/doc/src/erlang.xml
index 3dad09365..40ddcb854 100644
--- a/erts/doc/src/erlang.xml
+++ b/erts/doc/src/erlang.xml
@@ -7224,8 +7224,8 @@ ok
</func>
<func>
- <name name="system_info" arity="1" clause_i="11"/>
<name name="system_info" arity="1" clause_i="12"/>
+ <name name="system_info" arity="1" clause_i="13"/>
<fsummary>Information about the CPU topology of the system.</fsummary>
<type name="cpu_topology"/>
<type name="level_entry"/>
@@ -7325,12 +7325,12 @@ ok
</func>
<func>
- <name name="system_info" arity="1" clause_i="28"/>
<name name="system_info" arity="1" clause_i="29"/>
- <name name="system_info" arity="1" clause_i="37"/>
+ <name name="system_info" arity="1" clause_i="30"/>
<name name="system_info" arity="1" clause_i="38"/>
<name name="system_info" arity="1" clause_i="39"/>
<name name="system_info" arity="1" clause_i="40"/>
+ <name name="system_info" arity="1" clause_i="41"/>
<fsummary>Information about the default process heap settings.</fsummary>
<type name="message_queue_data"/>
<type name="max_heap_size"/>
@@ -7408,7 +7408,7 @@ ok
<name name="system_info" arity="1" clause_i="8"/>
<name name="system_info" arity="1" clause_i="9"/>
<name name="system_info" arity="1" clause_i="10"/>
- <name name="system_info" arity="1" clause_i="13"/>
+ <name name="system_info" arity="1" clause_i="11"/>
<name name="system_info" arity="1" clause_i="14"/>
<name name="system_info" arity="1" clause_i="15"/>
<name name="system_info" arity="1" clause_i="16"/>
@@ -7423,14 +7423,14 @@ ok
<name name="system_info" arity="1" clause_i="25"/>
<name name="system_info" arity="1" clause_i="26"/>
<name name="system_info" arity="1" clause_i="27"/>
- <name name="system_info" arity="1" clause_i="30"/>
+ <name name="system_info" arity="1" clause_i="28"/>
<name name="system_info" arity="1" clause_i="31"/>
<name name="system_info" arity="1" clause_i="32"/>
<name name="system_info" arity="1" clause_i="33"/>
<name name="system_info" arity="1" clause_i="34"/>
<name name="system_info" arity="1" clause_i="35"/>
<name name="system_info" arity="1" clause_i="36"/>
- <name name="system_info" arity="1" clause_i="41"/>
+ <name name="system_info" arity="1" clause_i="37"/>
<name name="system_info" arity="1" clause_i="42"/>
<name name="system_info" arity="1" clause_i="43"/>
<name name="system_info" arity="1" clause_i="44"/>
@@ -7460,6 +7460,7 @@ ok
<name name="system_info" arity="1" clause_i="68"/>
<name name="system_info" arity="1" clause_i="69"/>
<name name="system_info" arity="1" clause_i="70"/>
+ <name name="system_info" arity="1" clause_i="71"/>
<fsummary>Information about the system.</fsummary>
<desc>
<p>Returns various information about the current system
@@ -7471,6 +7472,12 @@ ok
<p>See <seealso marker="#system_info_allocator_tags">
above</seealso>.</p>
</item>
+ <tag><c>atom_count</c></tag>
+ <item>
+ <marker id="system_info_atom_count"></marker>
+ <p>Returns the number of atoms currently existing at the
+ local node. The value is given as an integer.</p>
+ </item>
<tag><c>atom_limit</c></tag>
<item>
<marker id="system_info_atom_limit"></marker>
diff --git a/erts/emulator/beam/erl_bif_info.c b/erts/emulator/beam/erl_bif_info.c
index 0e0842e13..9a3b78ae8 100644
--- a/erts/emulator/beam/erl_bif_info.c
+++ b/erts/emulator/beam/erl_bif_info.c
@@ -2863,6 +2863,9 @@ BIF_RETTYPE system_info_1(BIF_ALIST_1)
else if (ERTS_IS_ATOM_STR("atom_limit",BIF_ARG_1)) {
BIF_RET(make_small(erts_get_atom_limit()));
}
+ else if (ERTS_IS_ATOM_STR("atom_count",BIF_ARG_1)) {
+ BIF_RET(make_small(atom_table_size()));
+ }
else if (ERTS_IS_ATOM_STR("tolerant_timeofday",BIF_ARG_1)) {
if (erts_has_time_correction()
&& erts_time_offset_state() == ERTS_TIME_OFFSET_FINAL) {
diff --git a/erts/emulator/test/system_info_SUITE.erl b/erts/emulator/test/system_info_SUITE.erl
index 3d9e74472..6a772bf7c 100644
--- a/erts/emulator/test/system_info_SUITE.erl
+++ b/erts/emulator/test/system_info_SUITE.erl
@@ -36,7 +36,8 @@
-export([all/0, suite/0]).
-export([process_count/1, system_version/1, misc_smoke_tests/1,
- heap_size/1, wordsize/1, memory/1, ets_limit/1, atom_limit/1]).
+ heap_size/1, wordsize/1, memory/1, ets_limit/1, atom_limit/1,
+ atom_count/1]).
suite() ->
[{ct_hooks,[ts_install_cth]},
@@ -44,7 +45,7 @@ suite() ->
all() ->
[process_count, system_version, misc_smoke_tests,
- heap_size, wordsize, memory, ets_limit, atom_limit].
+ heap_size, wordsize, memory, ets_limit, atom_limit, atom_count].
%%%
%%% The test cases -------------------------------------------------------------
@@ -550,3 +551,13 @@ get_atom_limit(Config, AtomsMax) ->
end,
stop_node(Node),
Res.
+
+%% Verify that system_info(atom_count) works.
+atom_count(Config) when is_list(Config) ->
+ Limit = erlang:system_info(atom_limit),
+ Count1 = erlang:system_info(atom_count),
+ list_to_atom(integer_to_list(erlang:unique_integer())),
+ Count2 = erlang:system_info(atom_count),
+ true = Limit >= Count2,
+ true = Count2 > Count1,
+ ok.
diff --git a/erts/preloaded/src/erlang.erl b/erts/preloaded/src/erlang.erl
index 15c3e0165..6ca0a4c16 100644
--- a/erts/preloaded/src/erlang.erl
+++ b/erts/preloaded/src/erlang.erl
@@ -2532,6 +2532,7 @@ tuple_to_list(_Tuple) ->
Alloc :: atom();
({allocator_sizes, Alloc}) -> [_] when %% More or less anything
Alloc :: atom();
+ (atom_count) -> pos_integer();
(atom_limit) -> pos_integer();
(build_type) -> opt | debug | purify | quantify | purecov |
gcov | valgrind | gprof | lcnt | frmptr;
--
2.11.0
