615 lines
20 KiB
Ada
615 lines
20 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
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-- --
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-- S Y S T E M . O S _ I N T E R F A C E --
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-- --
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-- S p e c --
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-- --
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-- Copyright (C) 1995-2020, Free Software Foundation, Inc. --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 3, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. --
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-- --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception, --
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-- version 3.1, as published by the Free Software Foundation. --
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-- --
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-- You should have received a copy of the GNU General Public License and --
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-- a copy of the GCC Runtime Library Exception along with this program; --
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-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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-- <http://www.gnu.org/licenses/>. --
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-- --
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-- GNARL was developed by the GNARL team at Florida State University. --
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-- Extensive contributions were provided by Ada Core Technologies, Inc. --
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-- --
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------------------------------------------------------------------------------
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-- This is a QNX/Neutrino version of this package
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-- This package encapsulates all direct interfaces to OS services
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-- that are needed by the tasking run-time (libgnarl).
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-- PLEASE DO NOT add any with-clauses to this package or remove the pragma
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-- Preelaborate. This package is designed to be a bottom-level (leaf) package.
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with Ada.Unchecked_Conversion;
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with Interfaces.C;
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with System.OS_Constants;
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package System.OS_Interface is
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pragma Preelaborate;
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subtype int is Interfaces.C.int;
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subtype char is Interfaces.C.char;
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subtype short is Interfaces.C.short;
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subtype long is Interfaces.C.long;
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subtype unsigned is Interfaces.C.unsigned;
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subtype unsigned_short is Interfaces.C.unsigned_short;
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subtype unsigned_long is Interfaces.C.unsigned_long;
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subtype unsigned_char is Interfaces.C.unsigned_char;
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subtype plain_char is Interfaces.C.plain_char;
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subtype size_t is Interfaces.C.size_t;
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-----------
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-- Errno --
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-----------
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function errno return int;
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pragma Import (C, errno, "__get_errno");
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EPERM : constant := 1;
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EINTR : constant := 4;
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EAGAIN : constant := 11;
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ENOMEM : constant := 12;
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EINVAL : constant := 22;
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ETIMEDOUT : constant := 260;
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-------------
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-- Signals --
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-------------
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Max_Interrupt : constant := 64;
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type Signal is new int range 0 .. Max_Interrupt;
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for Signal'Size use int'Size;
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SIGHUP : constant := 1;
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SIGINT : constant := 2;
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SIGQUIT : constant := 3;
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SIGILL : constant := 4;
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SIGTRAP : constant := 5;
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SIGIOT : constant := 6;
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SIGABRT : constant := 6;
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SIGDEADLK : constant := 7;
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SIGFPE : constant := 8;
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SIGKILL : constant := 9;
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SIGBUS : constant := 10;
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SIGSEGV : constant := 11;
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SIGSYS : constant := 12;
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SIGPIPE : constant := 13;
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SIGALRM : constant := 14;
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SIGTERM : constant := 15;
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SIGUSR1 : constant := 16;
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SIGUSR2 : constant := 17;
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SIGCLD : constant := 18;
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SIGCHLD : constant := 18;
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SIGPWR : constant := 19;
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SIGWINCH : constant := 20;
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SIGURG : constant := 21;
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SIGPOLL : constant := 22;
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SIGIO : constant := 22;
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SIGSTOP : constant := 23;
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SIGTSTP : constant := 24;
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SIGCONT : constant := 25;
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SIGTTIN : constant := 26;
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SIGTTOU : constant := 27;
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SIGVTALRM : constant := 28;
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SIGPROF : constant := 29;
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SIGXCPU : constant := 30;
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SIGXFSZ : constant := 31;
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SIGRTMIN : constant := 41;
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SITRTMAX : constant := 56;
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SIGSELECT : constant := 57;
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SIGPHOTON : constant := 58;
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SIGADAABORT : constant := SIGABRT;
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-- Change this to use another signal for task abort. SIGTERM might be a
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-- good one.
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type Signal_Set is array (Natural range <>) of Signal;
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Unmasked : constant Signal_Set := (
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SIGTRAP,
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-- To enable debugging on multithreaded applications, mark SIGTRAP to
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-- be kept unmasked.
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SIGBUS,
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SIGTTIN, SIGTTOU, SIGTSTP,
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-- Keep these three signals unmasked so that background processes and IO
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-- behaves as normal "C" applications
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SIGPROF,
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-- To avoid confusing the profiler
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SIGKILL, SIGSTOP);
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-- These two signals actually can't be masked (POSIX won't allow it)
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Reserved : constant Signal_Set := (SIGABRT, SIGKILL, SIGSTOP, SIGSEGV);
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type sigset_t is private;
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function sigaddset (set : access sigset_t; sig : Signal) return int;
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pragma Import (C, sigaddset, "sigaddset");
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function sigdelset (set : access sigset_t; sig : Signal) return int;
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pragma Import (C, sigdelset, "sigdelset");
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function sigfillset (set : access sigset_t) return int;
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pragma Import (C, sigfillset, "sigfillset");
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function sigismember (set : access sigset_t; sig : Signal) return int;
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pragma Import (C, sigismember, "sigismember");
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function sigemptyset (set : access sigset_t) return int;
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pragma Import (C, sigemptyset, "sigemptyset");
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type pad7 is array (1 .. 7) of int;
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type siginfo_t is record
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si_signo : int;
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si_code : int;
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si_errno : int;
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X_data : pad7;
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end record;
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pragma Convention (C, siginfo_t);
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type struct_sigaction is record
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sa_handler : System.Address;
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sa_flags : int;
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sa_mask : sigset_t;
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end record;
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pragma Convention (C, struct_sigaction);
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type struct_sigaction_ptr is access all struct_sigaction;
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SIG_BLOCK : constant := 0;
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SIG_UNBLOCK : constant := 1;
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SIG_SETMASK : constant := 2;
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SIG_PENDING : constant := 5;
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SA_NOCLDSTOP : constant := 16#0001#;
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SA_SIGINFO : constant := 16#0002#;
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SA_RESETHAND : constant := 16#0004#;
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SA_ONSTACK : constant := 16#0008#;
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SA_NODEFER : constant := 16#0010#;
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SA_NOCLDWAIT : constant := 16#0020#;
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SS_ONSTACK : constant := 1;
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SS_DISABLE : constant := 2;
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SIG_DFL : constant := 0;
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SIG_IGN : constant := 1;
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function sigaction
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(sig : Signal;
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act : struct_sigaction_ptr;
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oact : struct_sigaction_ptr) return int;
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pragma Import (C, sigaction, "sigaction");
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----------
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-- Time --
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----------
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Time_Slice_Supported : constant Boolean := True;
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-- Indicates whether time slicing is supported
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type timespec is private;
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type clockid_t is new int;
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function clock_gettime
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(clock_id : clockid_t; tp : access timespec) return int;
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pragma Import (C, clock_gettime, "clock_gettime");
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function clock_getres
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(clock_id : clockid_t;
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res : access timespec) return int;
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pragma Import (C, clock_getres, "clock_getres");
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function To_Duration (TS : timespec) return Duration;
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pragma Inline (To_Duration);
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function To_Timespec (D : Duration) return timespec;
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pragma Inline (To_Timespec);
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-------------------------
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-- Priority Scheduling --
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-------------------------
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SCHED_FIFO : constant := 1;
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SCHED_RR : constant := 2;
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SCHED_OTHER : constant := 3;
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function To_Target_Priority
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(Prio : System.Any_Priority) return Interfaces.C.int
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with Inline_Always;
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-- Maps System.Any_Priority to a POSIX priority
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-------------
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-- Process --
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-------------
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type pid_t is private;
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function kill (pid : pid_t; sig : Signal) return int;
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pragma Import (C, kill, "kill");
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function getpid return pid_t;
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pragma Import (C, getpid, "getpid");
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-------------
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-- Threads --
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-------------
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type Thread_Body is access
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function (arg : System.Address) return System.Address;
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pragma Convention (C, Thread_Body);
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function Thread_Body_Access is new
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Ada.Unchecked_Conversion (System.Address, Thread_Body);
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type pthread_t is new int;
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subtype Thread_Id is pthread_t;
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type pthread_mutex_t is limited private;
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type pthread_cond_t is limited private;
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type pthread_attr_t is limited private;
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type pthread_mutexattr_t is limited private;
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type pthread_condattr_t is limited private;
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type pthread_key_t is private;
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PTHREAD_CREATE_DETACHED : constant := 1;
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PTHREAD_SCOPE_PROCESS : constant := 4;
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PTHREAD_SCOPE_SYSTEM : constant := 0;
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PTHREAD_INHERIT_SCHED : constant := 0;
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PTHREAD_EXPLICIT_SCHED : constant := 2;
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-- Read/Write lock not supported on Android.
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subtype pthread_rwlock_t is pthread_mutex_t;
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subtype pthread_rwlockattr_t is pthread_mutexattr_t;
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-----------
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-- Stack --
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-----------
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type stack_t is record
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ss_sp : System.Address;
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ss_flags : int;
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ss_size : size_t;
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end record;
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pragma Convention (C, stack_t);
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function sigaltstack
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(ss : not null access stack_t;
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oss : access stack_t) return int
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with Inline;
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-- Not supported on QNX
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Alternate_Stack : aliased System.Address;
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-- Dummy definition: alternate stack not available due to missing
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-- sigaltstack in QNX
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Alternate_Stack_Size : constant := 0;
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-- This must be kept in sync with init.c:__gnat_alternate_stack
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Stack_Base_Available : constant Boolean := False;
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-- Indicates whether the stack base is available on this target
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function Get_Stack_Base (thread : pthread_t) return System.Address
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with Inline;
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-- This is a dummy procedure to share some GNULLI files
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function Get_Page_Size return int;
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pragma Import (C, Get_Page_Size, "getpagesize");
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-- Returns the size of a page
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PROT_NONE : constant := 16#00_00#;
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PROT_READ : constant := 16#01_00#;
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PROT_WRITE : constant := 16#02_00#;
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PROT_EXEC : constant := 16#04_00#;
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PROT_ALL : constant := PROT_READ + PROT_WRITE + PROT_EXEC;
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PROT_ON : constant := PROT_READ;
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PROT_OFF : constant := PROT_ALL;
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function mprotect (addr : Address; len : size_t; prot : int) return int;
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pragma Import (C, mprotect);
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---------------------------------------
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-- Nonstandard Thread Initialization --
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---------------------------------------
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procedure pthread_init with Inline_Always;
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-------------------------
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-- POSIX.1c Section 3 --
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-------------------------
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function sigwait (set : access sigset_t; sig : access Signal) return int;
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pragma Import (C, sigwait, "sigwait");
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function pthread_kill (thread : pthread_t; sig : Signal) return int;
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pragma Import (C, pthread_kill, "pthread_kill");
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function pthread_sigmask
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(how : int;
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set : access sigset_t;
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oset : access sigset_t) return int;
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pragma Import (C, pthread_sigmask, "pthread_sigmask");
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--------------------------
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-- POSIX.1c Section 11 --
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--------------------------
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function pthread_mutexattr_init
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(attr : access pthread_mutexattr_t) return int;
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pragma Import (C, pthread_mutexattr_init, "pthread_mutexattr_init");
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function pthread_mutexattr_destroy
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(attr : access pthread_mutexattr_t) return int;
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pragma Import (C, pthread_mutexattr_destroy, "pthread_mutexattr_destroy");
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function pthread_mutex_init
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(mutex : access pthread_mutex_t;
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attr : access pthread_mutexattr_t) return int;
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pragma Import (C, pthread_mutex_init, "pthread_mutex_init");
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function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int;
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pragma Import (C, pthread_mutex_destroy, "pthread_mutex_destroy");
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function pthread_mutex_lock (mutex : access pthread_mutex_t) return int;
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pragma Import (C, pthread_mutex_lock, "pthread_mutex_lock");
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function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int;
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pragma Import (C, pthread_mutex_unlock, "pthread_mutex_unlock");
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function pthread_mutex_setprioceiling
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(mutex : access pthread_mutex_t;
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prioceiling : int;
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old_ceiling : access int) return int;
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pragma Import (C, pthread_mutex_setprioceiling);
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function pthread_condattr_init
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(attr : access pthread_condattr_t) return int;
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pragma Import (C, pthread_condattr_init, "pthread_condattr_init");
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function pthread_condattr_destroy
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(attr : access pthread_condattr_t) return int;
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pragma Import (C, pthread_condattr_destroy, "pthread_condattr_destroy");
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function pthread_cond_init
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(cond : access pthread_cond_t;
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attr : access pthread_condattr_t) return int;
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pragma Import (C, pthread_cond_init, "pthread_cond_init");
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function pthread_cond_destroy (cond : access pthread_cond_t) return int;
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pragma Import (C, pthread_cond_destroy, "pthread_cond_destroy");
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function pthread_cond_signal (cond : access pthread_cond_t) return int;
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pragma Import (C, pthread_cond_signal, "pthread_cond_signal");
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function pthread_cond_wait
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(cond : access pthread_cond_t;
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mutex : access pthread_mutex_t) return int;
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pragma Import (C, pthread_cond_wait, "pthread_cond_wait");
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function pthread_cond_timedwait
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(cond : access pthread_cond_t;
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mutex : access pthread_mutex_t;
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abstime : access timespec) return int;
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pragma Import (C, pthread_cond_timedwait, "pthread_cond_timedwait");
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--------------------------
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-- POSIX.1c Section 13 --
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--------------------------
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PTHREAD_PRIO_INHERIT : constant := 0;
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PTHREAD_PRIO_NONE : constant := 1;
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PTHREAD_PRIO_PROTECT : constant := 2;
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function pthread_mutexattr_setprotocol
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(attr : access pthread_mutexattr_t;
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protocol : int) return int;
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pragma Import (C, pthread_mutexattr_setprotocol);
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function pthread_mutexattr_getprotocol
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(attr : access pthread_mutexattr_t;
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protocol : access int) return int;
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pragma Import (C, pthread_mutexattr_getprotocol);
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function pthread_mutexattr_setprioceiling
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(attr : access pthread_mutexattr_t;
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prioceiling : int) return int;
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pragma Import (C, pthread_mutexattr_setprioceiling);
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function pthread_mutexattr_getprioceiling
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(attr : access pthread_mutexattr_t;
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prioceiling : access int) return int;
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pragma Import (C, pthread_mutexattr_getprioceiling);
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function pthread_mutex_getprioceiling
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(attr : access pthread_mutex_t;
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prioceiling : access int) return int;
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pragma Import (C, pthread_mutex_getprioceiling);
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type pad8 is array (1 .. 8) of int;
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pragma Convention (C, pad8);
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type struct_sched_param is record
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sched_priority : int := 0; -- scheduling priority
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sched_curpriority : int := 0;
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reserved : pad8 := (others => 0);
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end record;
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pragma Convention (C, struct_sched_param);
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function pthread_setschedparam
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(thread : pthread_t;
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policy : int;
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param : access struct_sched_param) return int;
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pragma Import (C, pthread_setschedparam, "pthread_setschedparam");
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function pthread_getschedparam
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(thread : pthread_t;
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policy : access int;
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param : access struct_sched_param) return int;
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pragma Import (C, pthread_getschedparam, "pthread_getschedparam");
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function pthread_setschedprio
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(thread : pthread_t;
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priority : int) return int;
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pragma Import (C, pthread_setschedprio);
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function pthread_attr_setschedparam
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(attr : access pthread_attr_t;
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param : access struct_sched_param) return int;
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pragma Import (C, pthread_attr_setschedparam);
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function pthread_attr_setinheritsched
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(attr : access pthread_attr_t;
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inheritsched : int) return int;
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pragma Import (C, pthread_attr_setinheritsched);
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function pthread_attr_setscope
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(attr : access pthread_attr_t;
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scope : int) return int;
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pragma Import (C, pthread_attr_setscope, "pthread_attr_setscope");
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function pthread_attr_setschedpolicy
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(attr : access pthread_attr_t;
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policy : int) return int;
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pragma Import
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(C, pthread_attr_setschedpolicy, "pthread_attr_setschedpolicy");
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function sched_yield return int;
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pragma Import (C, sched_yield, "sched_yield");
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---------------------------
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-- P1003.1c - Section 16 --
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---------------------------
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function pthread_attr_init
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(attributes : access pthread_attr_t) return int;
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pragma Import (C, pthread_attr_init, "pthread_attr_init");
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function pthread_attr_destroy
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(attributes : access pthread_attr_t) return int;
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pragma Import (C, pthread_attr_destroy, "pthread_attr_destroy");
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function pthread_attr_setdetachstate
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(attr : access pthread_attr_t;
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detachstate : int) return int;
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pragma Import (C, pthread_attr_setdetachstate);
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function pthread_attr_setstacksize
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(attr : access pthread_attr_t;
|
|
stacksize : size_t) return int;
|
|
pragma Import (C, pthread_attr_setstacksize);
|
|
|
|
function pthread_create
|
|
(thread : access pthread_t;
|
|
attributes : access pthread_attr_t;
|
|
start_routine : Thread_Body;
|
|
arg : System.Address) return int;
|
|
pragma Import (C, pthread_create, "pthread_create");
|
|
|
|
procedure pthread_exit (status : System.Address);
|
|
pragma Import (C, pthread_exit, "pthread_exit");
|
|
|
|
function pthread_self return pthread_t;
|
|
pragma Import (C, pthread_self, "pthread_self");
|
|
|
|
function lwp_self return System.Address;
|
|
pragma Import (C, lwp_self, "pthread_self");
|
|
|
|
--------------------------
|
|
-- POSIX.1c Section 17 --
|
|
--------------------------
|
|
|
|
function pthread_setspecific
|
|
(key : pthread_key_t;
|
|
value : System.Address) return int;
|
|
pragma Import (C, pthread_setspecific, "pthread_setspecific");
|
|
|
|
function pthread_getspecific (key : pthread_key_t) return System.Address;
|
|
pragma Import (C, pthread_getspecific, "pthread_getspecific");
|
|
|
|
type destructor_pointer is access procedure (arg : System.Address);
|
|
pragma Convention (C, destructor_pointer);
|
|
|
|
function pthread_key_create
|
|
(key : access pthread_key_t;
|
|
destructor : destructor_pointer) return int;
|
|
pragma Import (C, pthread_key_create, "pthread_key_create");
|
|
|
|
private
|
|
|
|
type sigset_t is array (1 .. 2) of Interfaces.Unsigned_32;
|
|
pragma Convention (C, sigset_t);
|
|
|
|
type pid_t is new int;
|
|
|
|
type time_t is new long;
|
|
|
|
type timespec is record
|
|
tv_sec : time_t;
|
|
tv_nsec : long;
|
|
end record;
|
|
pragma Convention (C, timespec);
|
|
|
|
type unsigned_long_long_t is mod 2 ** 64;
|
|
-- Local type only used to get the alignment of this type below
|
|
|
|
subtype char_array is Interfaces.C.char_array;
|
|
|
|
type pthread_attr_t is record
|
|
Data : char_array (1 .. OS_Constants.PTHREAD_ATTR_SIZE);
|
|
end record;
|
|
pragma Convention (C, pthread_attr_t);
|
|
for pthread_attr_t'Alignment use Interfaces.C.unsigned_long'Alignment;
|
|
|
|
type pthread_condattr_t is record
|
|
Data : char_array (1 .. OS_Constants.PTHREAD_CONDATTR_SIZE);
|
|
end record;
|
|
pragma Convention (C, pthread_condattr_t);
|
|
for pthread_condattr_t'Alignment use Interfaces.C.int'Alignment;
|
|
|
|
type pthread_mutexattr_t is record
|
|
Data : char_array (1 .. OS_Constants.PTHREAD_MUTEXATTR_SIZE);
|
|
end record;
|
|
pragma Convention (C, pthread_mutexattr_t);
|
|
for pthread_mutexattr_t'Alignment use Interfaces.C.int'Alignment;
|
|
|
|
type pthread_mutex_t is record
|
|
Data : char_array (1 .. OS_Constants.PTHREAD_MUTEX_SIZE);
|
|
end record;
|
|
pragma Convention (C, pthread_mutex_t);
|
|
for pthread_mutex_t'Alignment use Interfaces.C.unsigned_long'Alignment;
|
|
|
|
type pthread_cond_t is record
|
|
Data : char_array (1 .. OS_Constants.PTHREAD_COND_SIZE);
|
|
end record;
|
|
pragma Convention (C, pthread_cond_t);
|
|
for pthread_cond_t'Alignment use unsigned_long_long_t'Alignment;
|
|
|
|
type pthread_key_t is new int;
|
|
|
|
end System.OS_Interface;
|