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MINOR: lua: core: can set the nice of the current task

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This patch adds an LUA binding that permits to change the
task priority.
This commit is contained in:
Thierry FOURNIER 2015-02-16 19:34:56 +01:00 committed by Willy Tarreau
parent e94e77400a
commit 37196f4ecb
1 changed files with 25 additions and 0 deletions
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25
src/hlua.c
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@ -2491,6 +2491,30 @@ static int hlua_msleep(lua_State *L)
return MAY_LJMP(_hlua_sleep(L, delay));
}
/* This function change the nice of the currently executed
* task. It is used set low or high priority at the current
* task.
*/
__LJMP static int hlua_setnice(lua_State *L)
{
MAY_LJMP(check_args(L, 1, "set_nice"));
struct hlua *hlua = hlua_gethlua(L);
int nice = MAY_LJMP(luaL_checkinteger(L, 1));
/* If he task is not set, I'm in a start mode. */
if (!hlua || !hlua->task)
return 0;
if (nice < -1024)
nice = -1024;
if (nice > 1024)
nice = 1024;
hlua->task->nice = nice;
return 0;
}
/* This function is used as a calback of a task. It is called by the
* HAProxy task subsystem when the task is awaked. The LUA runtime can
* return an E_AGAIN signal, the emmiter of this signal must set a
@ -3301,6 +3325,7 @@ void hlua_init(void)
hlua_class_function(gL.T, "register_task", hlua_register_task);
hlua_class_function(gL.T, "register_fetches", hlua_register_fetches);
hlua_class_function(gL.T, "register_converters", hlua_register_converters);
hlua_class_function(gL.T, "set_nice", hlua_setnice);
hlua_class_function(gL.T, "sleep", hlua_sleep);
hlua_class_function(gL.T, "msleep", hlua_msleep);
hlua_class_function(gL.T, "add_acl", hlua_add_acl);