libc-bottom-half/cloudlibc/src/libc/sys/resource/getrusage.c

   1 // Copyright (c) 2016 Nuxi, https://nuxi.nl/
   2 //
   3 // SPDX-License-Identifier: BSD-2-Clause
   4
   5 #include <common/time.h>
   6
   7 #include <sys/resource.h>
   8
   9 #include <wasi/core.h>
  10 #include <errno.h>
  11
  12 int getrusage(int who, struct rusage *r_usage) {
  13   switch (who) {
  14     case RUSAGE_SELF: {
  15       __wasi_timestamp_t usertime = 0;
  16       (void)__wasi_clock_time_get(__WASI_CLOCK_PROCESS_CPUTIME_ID, 1000,
  17                                   &usertime);
  18       *r_usage = (struct rusage){
  19           .ru_utime = timestamp_to_timeval(usertime),
  20       };
  21       return 0;
  22     }
  23     case RUSAGE_CHILDREN:
  24       *r_usage = (struct rusage){};
  25       return 0;
  26     default:
  27       errno = EINVAL;
  28       return -1;
  29   }
  30 }