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84ebfef4 AW |
1 | /* Get process times |
2 | ||
5e69ceb7 | 3 | Copyright (C) 2008-2014 Free Software Foundation, Inc. |
84ebfef4 AW |
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 | } |