------------------------------------------------------------------------------ -- -- -- GNAT RUN-TIME COMPONENTS -- -- -- -- S Y S T E M . C _ T I M E -- -- -- -- S p e c -- -- -- -- Copyright (C) 2025, 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 -- -- . -- -- -- -- GNAT was originally developed by the GNAT team at New York University. -- -- Extensive contributions were provided by Ada Core Technologies, Inc. -- -- -- ------------------------------------------------------------------------------ -- This package provides the time_t, timeval and timespec types corresponding -- to the C types defined by the OS, as well as various conversion functions. with Interfaces.C; with System.OS_Constants; package System.C_Time with Pure is -- These two C structs represent durations with different accuracies and -- maximal values. type time_t is range -2 ** (OS_Constants.SIZEOF_tv_sec * 8 - 1) .. 2 ** (OS_Constants.SIZEOF_tv_sec * 8 - 1) - 1 with Convention => C, Size => OS_Constants.SIZEOF_tv_sec * 8; type usec_t is range -2 ** (OS_Constants.SIZEOF_tv_usec * 8 - 1) .. 2 ** (OS_Constants.SIZEOF_tv_usec * 8 - 1) - 1 with Convention => C, Size => OS_Constants.SIZEOF_tv_usec * 8; -- Larger than the suseconds_t C type on ARM 32 bits with GNU libc -- when __TIME_BITS=64. type timeval is record tv_sec : time_t; -- seconds tv_usec : usec_t; -- microseconds end record with Convention => C; type nsec_t is range -2 ** (OS_Constants.SIZEOF_tv_nsec * 8 - 1) .. 2 ** (OS_Constants.SIZEOF_tv_nsec * 8 - 1) - 1 with Convention => C, Size => OS_Constants.SIZEOF_tv_nsec * 8; -- Larger than the signed long int C type on x32. type timespec is record tv_sec : time_t; -- seconds tv_nsec : nsec_t; -- nanoseconds end record with Convention => C; -- All conversion functions truncate the result if it is inexact function To_Duration (T : timespec) return Duration with Inline; function To_Duration (T : timeval) return Duration with Inline; function To_Timespec (D : Duration) return timespec with Inline; function To_Timeval (D : Duration) return timeval with Inline; function In_Timeval_Duration (T : timeval) return Boolean with Inline; -- g-socket.adb if not Windows target function Milliseconds_To_Timeval (M : Interfaces.C.int) return timeval with Inline; -- g-sothco.ads -- g-spogwa.adb function Nanoseconds_To_Timespec (N : Interfaces.C.int) return timespec with Inline; function To_Timespec (T : timeval) return timespec with Inline; -- s-osinte__darwin.adb end System.C_Time;