[hurd, commited] hurd: support clock_gettime(CLOCK_PROCESS/THREAD_CPUTIME_ID)

[Samuel Thibault]

* sysdeps/mach/clock_gettime.c (__clock_gettime): Add support for
CLOCK_PROCESS_CPUTIME_ID and CLOCK_THREAD_CPUTIME_ID.
---
 sysdeps/mach/clock_gettime.c | 88 ++++++++++++++++++++++++++++++------
 1 file changed, 74 insertions(+), 14 deletions(-)

diff --git a/sysdeps/mach/clock_gettime.c b/sysdeps/mach/clock_gettime.c
index fbd80536d5..840e06036b 100644
--- a/sysdeps/mach/clock_gettime.c
+++ b/sysdeps/mach/clock_gettime.c
@@ -25,20 +25,80 @@
 int
 __clock_gettime (clockid_t clock_id, struct timespec *ts)
 {
-  if (clock_id != CLOCK_REALTIME)
-    {
-      errno = EINVAL;
-      return -1;
-    }
-
-  /* __host_get_time can only fail if passed an invalid host_t.
-     __mach_host_self could theoretically fail (producing an
-     invalid host_t) due to resource exhaustion, but we assume
-     this will never happen.  */
-  time_value_t tv;
-  __host_get_time (__mach_host_self (), &tv);
-  TIME_VALUE_TO_TIMESPEC (&tv, ts);
-  return 0;
+  mach_msg_type_number_t count;
+  error_t err;
+
+  switch (clock_id) {
+
+    case CLOCK_REALTIME:
+      {
+       /* __host_get_time can only fail if passed an invalid host_t.
+          __mach_host_self could theoretically fail (producing an
+          invalid host_t) due to resource exhaustion, but we assume
+          this will never happen.  */
+       time_value_t tv;
+       __host_get_time (__mach_host_self (), &tv);
+       TIME_VALUE_TO_TIMESPEC (&tv, ts);
+       return 0;
+      }
+
+    case CLOCK_PROCESS_CPUTIME_ID:
+      {
+       struct time_value t = { .seconds = 0, .microseconds = 0 };
+       struct task_basic_info bi;
+       struct task_thread_times_info tti;
+
+       /* Dead threads CPU time.  */
+       count = TASK_BASIC_INFO_COUNT;
+       err = __task_info (__mach_task_self (), TASK_BASIC_INFO,
+                          (task_info_t) &bi, &count);
+       if (err)
+         {
+           __set_errno(err);
+           return -1;
+         }
+       time_value_add (&t, &bi.user_time);
+       time_value_add (&t, &bi.system_time);
+
+       /* Live threads CPU time.  */
+       count = TASK_EVENTS_INFO_COUNT;
+       err = __task_info (__mach_task_self (), TASK_THREAD_TIMES_INFO,
+                          (task_info_t) &tti, &count);
+       if (err)
+         {
+           __set_errno(err);
+           return -1;
+         }
+       time_value_add (&t, &tti.user_time);
+       time_value_add (&t, &tti.system_time);
+
+       TIME_VALUE_TO_TIMESPEC(&t, ts);
+       return 0;
+      }
+
+    case CLOCK_THREAD_CPUTIME_ID:
+      {
+       struct thread_basic_info bi;
+       mach_port_t self = __mach_thread_self ();
+
+       count = THREAD_BASIC_INFO_COUNT;
+       err = __thread_info (self, THREAD_BASIC_INFO,
+                            (thread_info_t) &bi, &count);
+       __mach_port_deallocate (__mach_task_self (), self);
+       if (err)
+         {
+           __set_errno(err);
+           return -1;
+         }
+       time_value_add (&bi.user_time, &bi.system_time);
+
+       TIME_VALUE_TO_TIMESPEC(&bi.user_time, ts);
+       return 0;
+      }
+  }
+
+  errno = EINVAL;
+  return -1;
 }
 libc_hidden_def (__clock_gettime)
 
-- 
2.28.0