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Diffstat (limited to 'lib/times.c')
-rw-r--r-- | lib/times.c | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/lib/times.c b/lib/times.c new file mode 100644 index 000000000..f403e3de7 --- /dev/null +++ b/lib/times.c @@ -0,0 +1,66 @@ +/* Get process times + + Copyright (C) 2008-2017 Free Software Foundation, Inc. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2, or (at your option) + any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with this program; if not, see <http://www.gnu.org/licenses/>. */ + +/* Written by Simon Josefsson <simon@josefsson.org>, 2008. */ + +#include <config.h> + +/* Get times prototype. */ +#include <sys/times.h> + +/* Get round. */ +#include <math.h> + +/* Get GetProcessTimes etc. */ +#include <windows.h> + +static clock_t +filetime2clock (FILETIME time) +{ + float f; + + /* We have a 64-bit value, in the form of two DWORDS aka unsigned + int, counting the number of 100-nanosecond intervals. We need to + convert these to clock ticks. Older POSIX uses CLK_TCK to + indicate the number of clock ticks per second while modern POSIX + uses sysconf(_SC_CLK_TCK). Mingw32 does not appear to have + sysconf(_SC_CLK_TCK), but appears to have CLK_TCK = 1000 so we + use it. Note that CLOCKS_PER_SEC constant does not apply here, + it is for use with the clock function. */ + + f = (unsigned long long) time.dwHighDateTime << 32; + f += time.dwLowDateTime; + f = f * CLK_TCK / 10000000; + return (clock_t) round (f); +} + +clock_t +times (struct tms * buffer) +{ + FILETIME creation_time, exit_time, kernel_time, user_time; + + if (GetProcessTimes (GetCurrentProcess (), &creation_time, &exit_time, + &kernel_time, &user_time) == 0) + return (clock_t) -1; + + buffer->tms_utime = filetime2clock (user_time); + buffer->tms_stime = filetime2clock (kernel_time); + buffer->tms_cutime = 0; + buffer->tms_cstime = 0; + + return clock (); +} |