diff options
Diffstat (limited to 'lib/stdlib/doc/src/ets.xml')
| -rw-r--r-- | lib/stdlib/doc/src/ets.xml | 58 |
1 files changed, 43 insertions, 15 deletions
diff --git a/lib/stdlib/doc/src/ets.xml b/lib/stdlib/doc/src/ets.xml index ab1a5900b9..447fe51130 100644 --- a/lib/stdlib/doc/src/ets.xml +++ b/lib/stdlib/doc/src/ets.xml @@ -132,9 +132,10 @@ <name name="access"/> </datatype> <datatype> - <name><marker id="type-continuation">continuation()</marker></name> + <name>continuation()</name> <desc> - <p>Opaque continuation used by <seealso marker="#select/1"> + <p><marker id="type-continuation"/> + Opaque continuation used by <seealso marker="#select/1"> <c>select/1,3</c></seealso>, <seealso marker="#select_reverse/1"> <c>select_reverse/1,3</c></seealso>, <seealso marker="#match/1"> @@ -448,13 +449,13 @@ Error: fun containing local Erlang function calls <item><c>{owner, pid()}</c> <br></br> The pid of the owner of the table.</item> - <item><c>{protection, <seealso marker="#type-access">access()</seealso>}</c> <br></br> + <item><c>{protection, </c><seealso marker="#type-access">access()</seealso><c>}</c> <br></br> The table access rights.</item> <item><c>{size, integer() >= 0</c> <br></br> The number of objects inserted in the table.</item> - <item><c>{type, <seealso marker="#type-type">type()</seealso>}</c> <br></br> + <item><c>{type, </c><seealso marker="#type-type">type()</seealso><c>}</c> <br></br> The table type.</item> <item><c>{read_concurrency, boolean()}</c> <br></br> @@ -487,14 +488,39 @@ Error: fun containing local Erlang function calls <item><c>Item=fixed, Value=boolean()</c> <br></br> Indicates if the table is fixed by any process or not.</item> - <item> - <p><c>Item=safe_fixed, Value={FirstFixed,Info}|false</c> <br></br> + <item><marker id="info_2_safe_fixed_monotonic_time"/> + <p><c>Item=safe_fixed|safe_fixed_monotonic_time, Value={FixationTime,Info}|false</c> <br></br> </p> - <p>If the table has been fixed using <c>safe_fixtable/2</c>, - the call returns a tuple where <c>FirstFixed</c> is the + <p>If the table has been fixed using + <seealso marker="#safe_fixtable/2"><c>safe_fixtable/2</c></seealso>, + the call returns a tuple where <c>FixationTime</c> is the time when the table was first fixed by a process, which may or may not be one of the processes it is fixed by right now.</p> + <p>The format and value of <c>FixationTime</c> depends on + <c>Item</c>:</p> + <taglist> + <tag><c>safe_fixed</c></tag> + <item><p><c>FixationTime</c> will correspond to the result + returned by + <seealso marker="erts:erlang#timestamp/0">erlang:timestamp/0</seealso> + at the time of fixation. Note that when the system is using + single or multi + <seealso marker="erts:time_correction#Time_Warp_Modes">time warp + modes</seealso> this might produce strange results. This + since the usage of <c>safe_fixed</c> is not + <seealso marker="erts:time_correction#Time_Warp_Safe_Code">time warp + safe</seealso>. Time warp safe code need to use + <c>safe_fixed_monotonic_time</c> instead.</p></item> + + <tag><c>safe_fixed_monotonic_time</c></tag> + <item><p><c>FixationTime</c> will correspond to the result + returned by + <seealso marker="erts:erlang#monotonic_time/0">erlang:monotonic_time/0</seealso> + at the time of fixation. The usage of <c>safe_fixed_monotonic_time</c> is + <seealso marker="erts:time_correction#Time_Warp_Safe_Code">time warp + safe</seealso>.</p></item> + </taglist> <p><c>Info</c> is a possibly empty lists of tuples <c>{Pid,RefCount}</c>, one tuple for every process the table is fixed by right now. <c>RefCount</c> is the value @@ -610,7 +636,7 @@ ets:is_compiled_ms(Broken).</code> <p>Returns the last key <c><anno>Key</anno></c> according to Erlang term order in the table <c>Tab</c> of the <c>ordered_set</c> type. If the table is of any other type, the function is synonymous - to <c>first/2</c>. If the table is empty, + to <c>first/1</c>. If the table is empty, <c>'$end_of_table'</c> is returned.</p> <p>Use <c>prev/2</c> to find preceding keys in the table.</p> </desc> @@ -916,7 +942,7 @@ ets:select(Table,MatchSpec),</code> </item> <item> <p><c>{keypos,<anno>Pos</anno>}</c> - Specfies which element in the stored tuples should be + Specifies which element in the stored tuples should be used as key. By default, it is the first element, i.e. <c><anno>Pos</anno>=1</c>. However, this is not always appropriate. In particular, we do not want the first element to be the @@ -1134,9 +1160,11 @@ clean_all_with_value(Tab,X,Key) -> table but never releases it, the memory used by the deleted objects will never be freed. The performance of operations on the table will also degrade significantly.</p> - <p>Use <c>info/2</c> to retrieve information about which - processes have fixed which tables. A system with a lot of - processes fixing tables may need a monitor which sends alarms + <p>Use + <seealso marker="#info_2_safe_fixed_monotonic_time"><c>info(Tab, + safe_fixed_monotonic_time)</c></seealso> to retrieve information + about which processes have fixed which tables. A system with a lot + of processes fixing tables may need a monitor which sends alarms when tables have been fixed for too long.</p> <p>Note that for tables of the <c>ordered_set</c> type, <c>safe_fixtable/2</c> is not necessary as calls to @@ -1626,6 +1654,7 @@ true</pre> <name name="update_counter" arity="4" clause_i="2"/> <name name="update_counter" arity="3" clause_i="3"/> <name name="update_counter" arity="4" clause_i="3"/> + <fsummary>Update a counter object in an ETS table.</fsummary> <type variable="Tab"/> <type variable="Key"/> <type variable="UpdateOp" name_i="1"/> @@ -1633,7 +1662,6 @@ true</pre> <type variable="Threshold" name_i="1"/> <type variable="SetValue" name_i="1"/> <type variable="Default"/> - <fsummary>Update a counter object in an ETS table.</fsummary> <desc> <p>This function provides an efficient way to update one or more counters, without the hassle of having to look up an object, update @@ -1700,11 +1728,11 @@ true</pre> <func> <name name="update_element" arity="3" clause_i="1"/> <name name="update_element" arity="3" clause_i="2"/> + <fsummary>Updates the <c>Pos</c>:th element of the object with a given key in an ETS table.</fsummary> <type variable="Tab"/> <type variable="Key"/> <type variable="Value"/> <type variable="Pos"/> - <fsummary>Updates the <c>Pos</c>:th element of the object with a given key in an ETS table.</fsummary> <desc> <p>This function provides an efficient way to update one or more elements within an object, without the hassle of having to look up, |