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/*
* POSIX library for Lua 5.1, 5.2, 5.3 & 5.4.
* Copyright (C) 2013-2025 Gary V. Vaughan
* Copyright (C) 2010-2013 Reuben Thomas <rrt@sc3d.org>
* Copyright (C) 2008-2010 Natanael Copa <natanael.copa@gmail.com>
* Clean up and bug fixes by Leo Razoumov <slonik.az@gmail.com> 2006-10-11
* Luiz Henrique de Figueiredo <lhf@tecgraf.puc-rio.br> 07 Apr 2006 23:17:49
* Based on original by Claudio Terra for Lua 3.x.
* With contributions by Roberto Ierusalimschy.
* With documentation from Steve Donovan 2012
*/
/***
Process Times.
@module posix.sys.times
*/
#include <sys/times.h>
#include "_helpers.c"
#define pushtimefield(k,x) pushintegerfield((k), ((lua_Integer)x)/clk_tck)
/***
Process times record.
All times are measured in cpu seconds.
@table PosixTms
@int tms_utime time spent executing user instructions
@int tms_stime time spent in system execution
@int tms_cutime sum of *tms_utime* for calling process and its children
@int tms_cstime sum of *tms_stime* for calling process and its children
*/
static int
pushtms(lua_State *L)
{
static long clk_tck = 0;
struct tms t;
clock_t elapsed = times(&t);
if (elapsed == (clock_t) -1)
return pusherror(L, "times");
if (clk_tck == 0)
clk_tck = sysconf(_SC_CLK_TCK);
lua_createtable(L, 0, 5);
/* record elapsed time, and save accounting to struct */
pushtimefield("elapsed", elapsed);
/* record struct entries */
pushtimefield("tms_utime", t.tms_utime);
pushtimefield("tms_stime", t.tms_stime);
pushtimefield("tms_cutime", t.tms_cutime);
pushtimefield("tms_cstime", t.tms_cstime);
settypemetatable("PosixTms");
return 1;
}
/***
Get the current process times.
@function times
@treturn[1] PosixTms time accounting for this process, if successful
@return[2] nil
@treturn[2] string error message
@treturn[2] int errnum
@see times(2)
*/
static int
Ptimes(lua_State *L)
{
checknargs(L, 0);
return pushtms(L);
}
static const luaL_Reg posix_sys_times_fns[] =
{
LPOSIX_FUNC( Ptimes ),
{NULL, NULL}
};
LUALIB_API int
luaopen_posix_sys_times(lua_State *L)
{
luaL_newlib(L, posix_sys_times_fns);
lua_pushstring(L, LPOSIX_VERSION_STRING("sys.times"));
lua_setfield(L, -2, "version");
return 1;
}
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