Move gdbsupport to the top level

[deliverable/binutils-gdb.git] / gdbsupport / run-time-clock.h

diff --git a/gdbsupport/run-time-clock.h b/gdbsupport/run-time-clock.h
new file mode 100644 (file)
index 0000000..fef0c34
--- /dev/null
+++ b/gdbsupport/run-time-clock.h
@@ -0,0 +1,75 @@
+/* User/system CPU time clocks that follow the std::chrono interface.
+   Copyright (C) 2016-2020 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#ifndef COMMON_RUN_TIME_CLOCK_H
+#define COMMON_RUN_TIME_CLOCK_H
+
+#include <chrono>
+
+/* Count the total amount of time spent executing in user mode.  */
+
+struct user_cpu_time_clock
+{
+  using duration = std::chrono::microseconds;
+  using rep = duration::rep;
+  using period = duration::period;
+  using time_point = std::chrono::time_point<user_cpu_time_clock>;
+
+  static constexpr bool is_steady = true;
+
+  /* Use run_time_clock::now instead.  */
+  static time_point now () noexcept = delete;
+};
+
+/* Count the total amount of time spent executing in kernel mode.  */
+
+struct system_cpu_time_clock
+{
+  using duration = std::chrono::microseconds;
+  using rep = duration::rep;
+  using period = duration::period;
+  using time_point = std::chrono::time_point<system_cpu_time_clock>;
+
+  static constexpr bool is_steady = true;
+
+  /* Use run_time_clock::now instead.  */
+  static time_point now () noexcept = delete;
+};
+
+/* Count the total amount of time spent executing in userspace+kernel
+   mode.  */
+
+struct run_time_clock
+{
+  using duration = std::chrono::microseconds;
+  using rep = duration::rep;
+  using period = duration::period;
+  using time_point = std::chrono::time_point<run_time_clock>;
+
+  static constexpr bool is_steady = true;
+
+  static time_point now () noexcept;
+
+  /* Return the user/system time as separate time points, if
+     supported.  If not supported, then the combined user+kernel time
+     is returned in USER and SYSTEM is set to zero.  */
+  static void now (user_cpu_time_clock::time_point &user,
+                  system_cpu_time_clock::time_point &system) noexcept;
+};
+
+#endif /* COMMON_RUN_TIME_CLOCK_H */