| 1 | /* Get process times |
| 2 | |
| 3 | Copyright (C) 2008-2014 Free Software Foundation, Inc. |
| 4 | |
| 5 | This program is free software; you can redistribute it and/or modify |
| 6 | it under the terms of the GNU Lesser General Public License as published by |
| 7 | the Free Software Foundation; either version 2, or (at your option) |
| 8 | any later version. |
| 9 | |
| 10 | This program is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | GNU Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public License |
| 16 | along with this program; if not, see <http://www.gnu.org/licenses/>. */ |
| 17 | |
| 18 | /* Written by Simon Josefsson <simon@josefsson.org>, 2008. */ |
| 19 | |
| 20 | #include <config.h> |
| 21 | |
| 22 | /* Get times prototype. */ |
| 23 | #include <sys/times.h> |
| 24 | |
| 25 | /* Get round. */ |
| 26 | #include <math.h> |
| 27 | |
| 28 | /* Get GetProcessTimes etc. */ |
| 29 | #include <windows.h> |
| 30 | |
| 31 | static clock_t |
| 32 | filetime2clock (FILETIME time) |
| 33 | { |
| 34 | float f; |
| 35 | |
| 36 | /* We have a 64-bit value, in the form of two DWORDS aka unsigned |
| 37 | int, counting the number of 100-nanosecond intervals. We need to |
| 38 | convert these to clock ticks. Older POSIX uses CLK_TCK to |
| 39 | indicate the number of clock ticks per second while modern POSIX |
| 40 | uses sysconf(_SC_CLK_TCK). Mingw32 does not appear to have |
| 41 | sysconf(_SC_CLK_TCK), but appears to have CLK_TCK = 1000 so we |
| 42 | use it. Note that CLOCKS_PER_SEC constant does not apply here, |
| 43 | it is for use with the clock function. */ |
| 44 | |
| 45 | f = (unsigned long long) time.dwHighDateTime << 32; |
| 46 | f += time.dwLowDateTime; |
| 47 | f = f * CLK_TCK / 10000000; |
| 48 | return (clock_t) round (f); |
| 49 | } |
| 50 | |
| 51 | clock_t |
| 52 | times (struct tms * buffer) |
| 53 | { |
| 54 | FILETIME creation_time, exit_time, kernel_time, user_time; |
| 55 | |
| 56 | if (GetProcessTimes (GetCurrentProcess (), &creation_time, &exit_time, |
| 57 | &kernel_time, &user_time) == 0) |
| 58 | return (clock_t) -1; |
| 59 | |
| 60 | buffer->tms_utime = filetime2clock (user_time); |
| 61 | buffer->tms_stime = filetime2clock (kernel_time); |
| 62 | buffer->tms_cutime = 0; |
| 63 | buffer->tms_cstime = 0; |
| 64 | |
| 65 | return filetime2clock (creation_time); |
| 66 | } |