Mercurial > gnulib
annotate lib/getrusage.c @ 40196:e63f5d3edab5
relocatable-prog: Update documentation.
* doc/relocatable-maint.texi (Supporting Relocation): Update to match
the recent changes.
| author | Bruno Haible <bruno@clisp.org> |
|---|---|
| date | Sun, 24 Feb 2019 01:49:15 +0100 |
| parents | b06060465f09 |
| children |
| rev | line source |
|---|---|
| 16777 | 1 /* getrusage replacement for systems which lack it. |
| 2 | |
|
40057
b06060465f09
maint: Run 'make update-copyright'
Paul Eggert <eggert@cs.ucla.edu>
parents:
19595
diff
changeset
|
3 Copyright (C) 2012-2019 Free Software Foundation, Inc. |
| 16777 | 4 |
| 5 This program is free software: you can redistribute it and/or modify | |
| 6 it under the terms of the GNU General Public License as published by | |
| 7 the Free Software Foundation; either version 3 of the License, or | |
| 8 (at your option) 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 General Public License for more details. | |
| 14 | |
| 15 You should have received a copy of the GNU General Public License | |
| 19190 | 16 along with this program. If not, see <https://www.gnu.org/licenses/>. */ |
| 16777 | 17 |
| 18 /* Written by Bruno Haible, 2012. */ | |
| 19 | |
| 20 #include <config.h> | |
| 21 | |
| 22 /* Specification. */ | |
| 23 #include <sys/resource.h> | |
| 24 | |
| 25 #include <errno.h> | |
| 26 #include <string.h> | |
| 27 | |
| 28 /* Get uint64_t. */ | |
| 29 #include <stdint.h> | |
| 30 | |
|
19595
beb2ad957aca
Simplify code. Drop support for Borland C++ on Windows.
Bruno Haible <bruno@clisp.org>
parents:
19484
diff
changeset
|
31 #if defined _WIN32 && ! defined __CYGWIN__ |
| 16777 | 32 |
| 33 # define WIN32_LEAN_AND_MEAN | |
| 34 # include <windows.h> | |
| 35 | |
| 36 #else | |
| 37 | |
| 38 # include <sys/times.h> | |
| 39 # include <unistd.h> | |
| 40 #endif | |
| 41 | |
| 42 int | |
| 43 getrusage (int who, struct rusage *usage_p) | |
| 44 { | |
| 45 if (who == RUSAGE_SELF || who == RUSAGE_CHILDREN) | |
| 46 { | |
| 47 /* Clear all unsupported members of 'struct rusage'. */ | |
| 48 memset (usage_p, '\0', sizeof (struct rusage)); | |
| 49 | |
|
19595
beb2ad957aca
Simplify code. Drop support for Borland C++ on Windows.
Bruno Haible <bruno@clisp.org>
parents:
19484
diff
changeset
|
50 #if defined _WIN32 && ! defined __CYGWIN__ |
| 16777 | 51 if (who == RUSAGE_SELF) |
| 52 { | |
| 53 /* Fill in the ru_utime and ru_stime members. */ | |
| 54 FILETIME creation_time; | |
| 55 FILETIME exit_time; | |
| 56 FILETIME kernel_time; | |
| 57 FILETIME user_time; | |
| 58 | |
| 59 if (GetProcessTimes (GetCurrentProcess (), | |
| 60 &creation_time, &exit_time, | |
| 61 &kernel_time, &user_time)) | |
| 62 { | |
| 63 /* Convert to microseconds, rounding. */ | |
| 64 uint64_t kernel_usec = | |
| 65 ((((uint64_t) kernel_time.dwHighDateTime << 32) | |
| 66 | (uint64_t) kernel_time.dwLowDateTime) | |
| 67 + 5) / 10; | |
| 68 uint64_t user_usec = | |
| 69 ((((uint64_t) user_time.dwHighDateTime << 32) | |
| 70 | (uint64_t) user_time.dwLowDateTime) | |
| 71 + 5) / 10; | |
| 72 | |
| 73 usage_p->ru_utime.tv_sec = user_usec / 1000000U; | |
| 74 usage_p->ru_utime.tv_usec = user_usec % 1000000U; | |
| 75 usage_p->ru_stime.tv_sec = kernel_usec / 1000000U; | |
| 76 usage_p->ru_stime.tv_usec = kernel_usec % 1000000U; | |
| 77 } | |
| 78 } | |
| 79 #else | |
| 80 /* Fill in the ru_utime and ru_stime members. */ | |
| 81 { | |
| 82 struct tms time; | |
| 83 | |
| 84 if (times (&time) != (clock_t) -1) | |
| 85 { | |
| 86 /* Number of clock ticks per second. */ | |
| 87 unsigned int clocks_per_second = sysconf (_SC_CLK_TCK); | |
| 88 | |
| 89 if (clocks_per_second > 0) | |
| 90 { | |
| 91 clock_t user_ticks; | |
| 92 clock_t system_ticks; | |
| 93 | |
| 94 uint64_t user_usec; | |
| 95 uint64_t system_usec; | |
| 96 | |
| 97 if (who == RUSAGE_CHILDREN) | |
| 98 { | |
| 99 user_ticks = time.tms_cutime; | |
| 100 system_ticks = time.tms_cstime; | |
| 101 } | |
| 102 else | |
| 103 { | |
| 104 user_ticks = time.tms_utime; | |
| 105 system_ticks = time.tms_stime; | |
| 106 } | |
| 107 | |
| 108 user_usec = | |
| 109 (((uint64_t) user_ticks * (uint64_t) 1000000U) | |
| 110 + clocks_per_second / 2) / clocks_per_second; | |
| 111 system_usec = | |
| 112 (((uint64_t) system_ticks * (uint64_t) 1000000U) | |
| 113 + clocks_per_second / 2) / clocks_per_second; | |
| 114 | |
| 115 usage_p->ru_utime.tv_sec = user_usec / 1000000U; | |
| 116 usage_p->ru_utime.tv_usec = user_usec % 1000000U; | |
| 117 usage_p->ru_stime.tv_sec = system_usec / 1000000U; | |
| 118 usage_p->ru_stime.tv_usec = system_usec % 1000000U; | |
| 119 } | |
| 120 } | |
| 121 } | |
| 122 #endif | |
| 123 | |
| 124 return 0; | |
| 125 } | |
| 126 else | |
| 127 { | |
| 128 errno = EINVAL; | |
| 129 return -1; | |
| 130 } | |
| 131 } |