diff options
Diffstat (limited to 'lib/stdlib/doc/src')
| -rw-r--r-- | lib/stdlib/doc/src/supervisor.xml | 43 |
1 files changed, 29 insertions, 14 deletions
diff --git a/lib/stdlib/doc/src/supervisor.xml b/lib/stdlib/doc/src/supervisor.xml index 45fa0847a8..d6203bdaa0 100644 --- a/lib/stdlib/doc/src/supervisor.xml +++ b/lib/stdlib/doc/src/supervisor.xml @@ -4,7 +4,7 @@ <erlref> <header> <copyright> - <year>1996</year><year>2010</year> + <year>1996</year><year>2011</year> <holder>Ericsson AB. All Rights Reserved.</holder> </copyright> <legalnotice> @@ -83,11 +83,17 @@ supervisor, where all child processes are dynamically added instances of the same process type, i.e. running the same code.</p> - <p>The functions <c>terminate_child/2</c>, <c>delete_child/2</c> + <p>The functions <c>delete_child/2</c> and <c>restart_child/2</c> are invalid for <c>simple_one_for_one</c> supervisors and will return <c>{error,simple_one_for_one}</c> if the specified supervisor uses this restart strategy.</p> + <p>The function <c>terminate_child/2</c> can be used for + children under <c>simple_one_for_one</c> supervisors by + giving the child's <c>pid()</c> as the second argument. If + instead the child specification identifier is used, + <c>terminate_child/2</c> will return + <c>{error,simple_one_for_one}</c>.</p> </item> </list> <p>To prevent a supervisor from getting into an infinite loop of @@ -311,24 +317,33 @@ child_spec() = {Id,StartFunc,Restart,Shutdown,Type,Modules} <type> <v>SupRef = Name | {Name,Node} | {global,Name} | pid()</v> <v> Name = Node = atom()</v> - <v>Id = term()</v> + <v>Id = pid() | term()</v> <v>Result = ok | {error,Error}</v> <v> Error = not_found | simple_one_for_one</v> </type> <desc> - <p>Tells the supervisor <c>SupRef</c> to terminate the child - process corresponding to the child specification identified - by <c>Id</c>. The process, if there is one, is terminated but - the child specification is kept by the supervisor. This means - that the child process may be later be restarted by - the supervisor. The child process can also be restarted - explicitly by calling <c>restart_child/2</c>. Use - <c>delete_child/2</c> to remove the child specification.</p> + <p>Tells the supervisor <c>SupRef</c> to terminate the given + child.</p> + <p>If the supervisor is not <c>simple_one_for_one</c>, + <c>Id</c> must be the child specification identifier. The + process, if there is one, is terminated but the child + specification is kept by the supervisor. The child process + may later be restarted by the supervisor. The child process + can also be restarted explicitly by calling + <c>restart_child/2</c>. Use <c>delete_child/2</c> to remove + the child specification.</p> + <p>If the supervisor is <c>simple_one_for_one</c>, <c>Id</c> + must be the child process' <c>pid()</c>. I the specified + process is alive, but is not a child of the given + supervisor, the function will return + <c>{error,not_found}</c>. If the child specification + identifier is given instead instead of a <c>pid()</c>, the + function will return <c>{error,simple_one_for_one}</c>.</p> + <p>If successful, the function returns <c>ok</c>. If there is + no child specification with the specified <c>Id</c>, the + function returns <c>{error,not_found}</c>.</p> <p>See <c>start_child/2</c> for a description of <c>SupRef</c>.</p> - <p>If successful, the function returns <c>ok</c>. If there is - no child specification with the specified <c>Id</c>, - the function returns <c>{error,not_found}</c>.</p> </desc> </func> <func> |