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------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME COMPONENTS --
-- --
-- A D A . E X E C U T I O N _ T I M E --
-- --
-- B o d y --
-- --
-- Copyright (C) 2007-2023, Free Software Foundation, Inc. --
-- --
-- GNAT is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
-- ware Foundation; either version 3, or (at your option) any later ver- --
-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE. --
-- --
-- As a special exception under Section 7 of GPL version 3, you are granted --
-- additional permissions described in the GCC Runtime Library Exception, --
-- version 3.1, as published by the Free Software Foundation. --
-- --
-- You should have received a copy of the GNU General Public License and --
-- a copy of the GCC Runtime Library Exception along with this program; --
-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
-- <http://www.gnu.org/licenses/>. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
-- This is the Darwin version of this package
with Ada.Task_Identification; use Ada.Task_Identification;
with Ada.Unchecked_Conversion;
with System.Tasking;
with System.OS_Interface; use System.OS_Interface;
with System.Task_Primitives.Operations; use System.Task_Primitives.Operations;
with Interfaces.C; use Interfaces.C;
package body Ada.Execution_Time is
---------
-- "+" --
---------
function "+"
(Left : CPU_Time;
Right : Ada.Real_Time.Time_Span) return CPU_Time
is
use type Ada.Real_Time.Time;
begin
return CPU_Time (Ada.Real_Time.Time (Left) + Right);
end "+";
function "+"
(Left : Ada.Real_Time.Time_Span;
Right : CPU_Time) return CPU_Time
is
use type Ada.Real_Time.Time;
begin
return CPU_Time (Left + Ada.Real_Time.Time (Right));
end "+";
---------
-- "-" --
---------
function "-"
(Left : CPU_Time;
Right : Ada.Real_Time.Time_Span) return CPU_Time
is
use type Ada.Real_Time.Time;
begin
return CPU_Time (Ada.Real_Time.Time (Left) - Right);
end "-";
function "-"
(Left : CPU_Time;
Right : CPU_Time) return Ada.Real_Time.Time_Span
is
use type Ada.Real_Time.Time;
begin
return (Ada.Real_Time.Time (Left) - Ada.Real_Time.Time (Right));
end "-";
-----------
-- Clock --
-----------
function Clock
(T : Ada.Task_Identification.Task_Id :=
Ada.Task_Identification.Current_Task) return CPU_Time
is
function Convert_Ids is new
Ada.Unchecked_Conversion (Task_Id, System.Tasking.Task_Id);
function To_CPU_Time is
new Ada.Unchecked_Conversion (Duration, CPU_Time);
-- Time is equal to Duration (although it is a private type) and
-- CPU_Time is equal to Time.
subtype integer_t is Interfaces.C.int;
subtype mach_port_t is integer_t;
-- Type definition for Mach.
type time_value_t is record
seconds : integer_t;
microseconds : integer_t;
end record;
pragma Convention (C, time_value_t);
-- Mach time_value_t
type thread_basic_info_t is record
user_time : time_value_t;
system_time : time_value_t;
cpu_usage : integer_t;
policy : integer_t;
run_state : integer_t;
flags : integer_t;
suspend_count : integer_t;
sleep_time : integer_t;
end record;
pragma Convention (C, thread_basic_info_t);
-- Mach structure from thread_info.h
THREAD_BASIC_INFO : constant := 3;
THREAD_BASIC_INFO_COUNT : constant := 10;
-- Flavors for basic info
function thread_info (Target : mach_port_t;
Flavor : integer_t;
Thread_Info : System.Address;
Count : System.Address) return integer_t;
pragma Import (C, thread_info);
-- Mach call to get info on a thread
function pthread_mach_thread_np (Thread : pthread_t) return mach_port_t;
pragma Import (C, pthread_mach_thread_np);
-- Get Mach thread from posix thread
Result : Interfaces.C.int;
Thread : pthread_t;
Port : mach_port_t;
Ti : thread_basic_info_t;
Count : integer_t;
begin
if T = Ada.Task_Identification.Null_Task_Id then
raise Program_Error;
end if;
Thread := Get_Thread_Id (Convert_Ids (T));
Port := pthread_mach_thread_np (Thread);
pragma Assert (Port > 0);
Count := THREAD_BASIC_INFO_COUNT;
Result := thread_info (Port, THREAD_BASIC_INFO,
Ti'Address, Count'Address);
pragma Assert (Result = 0);
pragma Assert (Count = THREAD_BASIC_INFO_COUNT);
return To_CPU_Time
(Duration (Ti.user_time.seconds + Ti.system_time.seconds)
+ Duration (Ti.user_time.microseconds
+ Ti.system_time.microseconds) / 1E6);
end Clock;
--------------------------
-- Clock_For_Interrupts --
--------------------------
function Clock_For_Interrupts return CPU_Time is
begin
-- According to AI 0170-1, D.14(18.1/3), if Interrupt_Clocks_Supported
-- is set to False the function raises Program_Error.
raise Program_Error;
return CPU_Time_First;
end Clock_For_Interrupts;
-----------
-- Split --
-----------
procedure Split
(T : CPU_Time;
SC : out Ada.Real_Time.Seconds_Count;
TS : out Ada.Real_Time.Time_Span)
is
begin
Ada.Real_Time.Split (Ada.Real_Time.Time (T), SC, TS);
end Split;
-------------
-- Time_Of --
-------------
function Time_Of
(SC : Ada.Real_Time.Seconds_Count;
TS : Ada.Real_Time.Time_Span := Ada.Real_Time.Time_Span_Zero)
return CPU_Time
is
begin
return CPU_Time (Ada.Real_Time.Time_Of (SC, TS));
end Time_Of;
end Ada.Execution_Time;
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