diff options
| -rw-r--r-- | erts/emulator/beam/erl_db.c | 24 | ||||
| -rw-r--r-- | lib/stdlib/doc/src/ets.xml | 6 | ||||
| -rw-r--r-- | lib/stdlib/test/ets_SUITE.erl | 18 |
3 files changed, 38 insertions, 10 deletions
diff --git a/erts/emulator/beam/erl_db.c b/erts/emulator/beam/erl_db.c index 41e64fcd4f..a5d67571e2 100644 --- a/erts/emulator/beam/erl_db.c +++ b/erts/emulator/beam/erl_db.c @@ -1,7 +1,7 @@ /* * %CopyrightBegin% * - * Copyright Ericsson AB 1996-2013. All Rights Reserved. + * Copyright Ericsson AB 1996-2014. All Rights Reserved. * * The contents of this file are subject to the Erlang Public License, * Version 1.1, (the "License"); you may not use this file except in @@ -125,6 +125,7 @@ get_meta_main_tab_lock(unsigned slot) static erts_smp_spinlock_t meta_main_tab_main_lock; static Uint meta_main_tab_first_free; /* Index of first free slot */ static int meta_main_tab_cnt; /* Number of active tables */ +static int meta_main_tab_top; /* Highest ever used slot + 1 */ static Uint meta_main_tab_slot_mask; /* The slot index part of an unnamed table id */ static Uint meta_main_tab_seq_incr; static Uint meta_main_tab_seq_cnt = 0; /* To give unique(-ish) table identifiers */ @@ -1469,6 +1470,10 @@ BIF_RETTYPE ets_new_2(BIF_ALIST_2) ASSERT(slot>=0 && slot<db_max_tabs); meta_main_tab_first_free = GET_NEXT_FREE_SLOT(slot); meta_main_tab_cnt++; + if (slot >= meta_main_tab_top) { + ASSERT(slot == meta_main_tab_top); + meta_main_tab_top = slot + 1; + } if (is_named) { ret = BIF_ARG_1; @@ -2058,27 +2063,31 @@ BIF_RETTYPE ets_all_0(BIF_ALIST_0) { DbTable* tb; Eterm previous; - int i, j; + int i; Eterm* hp; Eterm* hendp; int t_tabs_cnt; - int t_max_tabs; + int t_top; erts_smp_spin_lock(&meta_main_tab_main_lock); t_tabs_cnt = meta_main_tab_cnt; - t_max_tabs = db_max_tabs; + t_top = meta_main_tab_top; erts_smp_spin_unlock(&meta_main_tab_main_lock); hp = HAlloc(BIF_P, 2*t_tabs_cnt); hendp = hp + 2*t_tabs_cnt; previous = NIL; - j = 0; - for(i = 0; (i < t_max_tabs && j < t_tabs_cnt); i++) { + for(i = 0; i < t_top; i++) { erts_smp_rwmtx_t *mmtl = get_meta_main_tab_lock(i); erts_smp_rwmtx_rlock(mmtl); if (IS_SLOT_ALIVE(i)) { - j++; + if (hp == hendp) { + /* Racing table creator, grab some more heap space */ + t_tabs_cnt = 10; + hp = HAlloc(BIF_P, 2*t_tabs_cnt); + hendp = hp + 2*t_tabs_cnt; + } tb = meta_main_tab[i].u.tb; previous = CONS(hp, tb->common.id, previous); hp += 2; @@ -2849,6 +2858,7 @@ void init_db(void) ERTS_ETS_MISC_MEM_ADD(size); meta_main_tab_cnt = 0; + meta_main_tab_top = 0; for (i=1; i<db_max_tabs; i++) { SET_NEXT_FREE_SLOT(i-1,i); } diff --git a/lib/stdlib/doc/src/ets.xml b/lib/stdlib/doc/src/ets.xml index 21cf8e4149..3df24bf688 100644 --- a/lib/stdlib/doc/src/ets.xml +++ b/lib/stdlib/doc/src/ets.xml @@ -4,7 +4,7 @@ <erlref> <header> <copyright> - <year>1996</year><year>2013</year> + <year>1996</year><year>2014</year> <holder>Ericsson AB. All Rights Reserved.</holder> </copyright> <legalnotice> @@ -171,6 +171,10 @@ <p>Returns a list of all tables at the node. Named tables are given by their names, unnamed tables are given by their table identifiers.</p> + <p>There is no guarantee of consistency in the returned list. Tables created + or deleted by other processes "during" the ets:all() call may or may + not be included in the list. Only tables created/deleted <em>before</em> + ets:all() is called are guaranteed to be included/excluded.</p> </desc> </func> <func> diff --git a/lib/stdlib/test/ets_SUITE.erl b/lib/stdlib/test/ets_SUITE.erl index 82c3e7ecaf..8dc8b2c291 100644 --- a/lib/stdlib/test/ets_SUITE.erl +++ b/lib/stdlib/test/ets_SUITE.erl @@ -1,7 +1,7 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 1996-2013. All Rights Reserved. +%% Copyright Ericsson AB 1996-2014. All Rights Reserved. %% %% The contents of this file are subject to the Erlang Public License, %% Version 1.1, (the "License"); you may not use this file except in @@ -75,6 +75,7 @@ -export([otp_9932/1]). -export([otp_9423/1]). -export([otp_10182/1]). +-export([ets_all/1]). -export([memory_check_summary/1]). -export([init_per_testcase/2, end_per_testcase/2]). @@ -151,6 +152,7 @@ all() -> otp_10182, otp_9932, otp_9423, + ets_all, memory_check_summary]. % MUST BE LAST @@ -5565,7 +5567,19 @@ otp_10182(Config) when is_list(Config) -> ets:delete(Db), In = Out. - +%% Test that ets:all include/exclude tables that we know are created/deleted +ets_all(Config) when is_list(Config) -> + Pids = [spawn_link(fun() -> ets_all_run() end) || _ <- [1,2]], + receive after 3*1000 -> ok end, + [begin unlink(P), exit(P,kill) end || P <- Pids], + ok. + +ets_all_run() -> + Table = ets:new(undefined, []), + true = lists:member(Table, ets:all()), + ets:delete(Table), + false = lists:member(Table, ets:all()), + ets_all_run(). % |