599 lines
21 KiB
Ada
599 lines
21 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) 1991-2017, Florida State University --
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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 Darwin pthreads version of this package
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-- This package includes all direct interfaces to OS services that are needed
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-- 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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-- Elaborate_Body. It is designed to be a bottom-level (leaf) package.
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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 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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EINTR : constant := 4;
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ENOMEM : constant := 12;
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EINVAL : constant := 22;
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EAGAIN : constant := 35;
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ETIMEDOUT : constant := 60;
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-------------
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-- Signals --
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-------------
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Max_Interrupt : constant := 31;
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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; -- hangup
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SIGINT : constant := 2; -- interrupt (rubout)
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SIGQUIT : constant := 3; -- quit (ASCD FS)
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SIGILL : constant := 4; -- illegal instruction (not reset)
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SIGTRAP : constant := 5; -- trace trap (not reset)
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SIGIOT : constant := 6; -- IOT instruction
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SIGABRT : constant := 6; -- used by abort, replace SIGIOT in the future
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SIGEMT : constant := 7; -- EMT instruction
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SIGFPE : constant := 8; -- floating point exception
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SIGKILL : constant := 9; -- kill (cannot be caught or ignored)
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SIGBUS : constant := 10; -- bus error
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SIGSEGV : constant := 11; -- segmentation violation
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SIGSYS : constant := 12; -- bad argument to system call
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SIGPIPE : constant := 13; -- write on a pipe with no one to read it
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SIGALRM : constant := 14; -- alarm clock
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SIGTERM : constant := 15; -- software termination signal from kill
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SIGURG : constant := 16; -- urgent condition on IO channel
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SIGSTOP : constant := 17; -- stop (cannot be caught or ignored)
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SIGTSTP : constant := 18; -- user stop requested from tty
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SIGCONT : constant := 19; -- stopped process has been continued
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SIGCHLD : constant := 20; -- child status change
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SIGTTIN : constant := 21; -- background tty read attempted
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SIGTTOU : constant := 22; -- background tty write attempted
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SIGIO : constant := 23; -- I/O possible (Solaris SIGPOLL alias)
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SIGXCPU : constant := 24; -- CPU time limit exceeded
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SIGXFSZ : constant := 25; -- filesize limit exceeded
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SIGVTALRM : constant := 26; -- virtual timer expired
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SIGPROF : constant := 27; -- profiling timer expired
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SIGWINCH : constant := 28; -- window size change
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SIGINFO : constant := 29; -- information request
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SIGUSR1 : constant := 30; -- user defined signal 1
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SIGUSR2 : constant := 31; -- user defined signal 2
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SIGADAABORT : constant := SIGABRT;
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-- Change this if you want to use another signal for task abort.
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-- SIGTERM might be a 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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(SIGTTIN, SIGTTOU, SIGSTOP, SIGTSTP);
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Reserved : constant Signal_Set :=
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(SIGKILL, SIGSTOP);
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Exception_Signals : constant Signal_Set :=
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(SIGFPE, SIGILL, SIGSEGV, SIGBUS);
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-- These signals (when runtime or system) will be caught and converted
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-- into an Ada exception.
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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 siginfo_t is private;
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type ucontext_t is private;
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type Signal_Handler is access procedure
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(signo : Signal;
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info : access siginfo_t;
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context : access ucontext_t);
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type struct_sigaction is record
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sa_handler : System.Address;
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sa_mask : sigset_t;
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sa_flags : int;
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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 := 1;
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SIG_UNBLOCK : constant := 2;
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SIG_SETMASK : constant := 3;
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SIG_DFL : constant := 0;
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SIG_IGN : constant := 1;
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SA_SIGINFO : constant := 16#0040#;
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SA_ONSTACK : constant := 16#0001#;
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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;
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tp : access timespec) return int;
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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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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_OTHER : constant := 1;
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SCHED_RR : constant := 2;
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SCHED_FIFO : constant := 4;
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function To_Target_Priority
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(Prio : System.Any_Priority) return Interfaces.C.int;
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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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-- LWP --
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---------
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function lwp_self return System.Address;
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pragma Import (C, lwp_self, "__gnat_lwp_self");
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-- Return the mach thread bound to the current thread. The value is not
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-- used by the run-time library but made available to debuggers.
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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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type pthread_t is private;
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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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type pthread_mutex_ptr is access all pthread_mutex_t;
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type pthread_cond_ptr is access all pthread_cond_t;
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PTHREAD_CREATE_DETACHED : constant := 2;
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PTHREAD_SCOPE_PROCESS : constant := 2;
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PTHREAD_SCOPE_SYSTEM : constant := 1;
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-- Read/Write lock not supported on Darwin. To add support both types
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-- pthread_rwlock_t and pthread_rwlockattr_t must properly be defined
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-- with the associated routines pthread_rwlock_[init/destroy] and
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-- pthread_rwlock_[rdlock/wrlock/unlock].
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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_size : size_t;
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ss_flags : int;
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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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pragma Import (C, sigaltstack, "sigaltstack");
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Alternate_Stack : aliased System.Address;
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pragma Import (C, Alternate_Stack, "__gnat_alternate_stack");
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-- The alternate signal stack for stack overflows
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Alternate_Stack_Size : constant := 32 * 1024;
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-- This must be in keeping 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. This
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-- allows us to share s-osinte.adb between all the FSU run time. Note that
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-- this value can only be true if pthread_t has a complete definition that
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-- corresponds exactly to the C header files.
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function Get_Stack_Base (thread : pthread_t) return System.Address;
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pragma Inline (Get_Stack_Base);
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-- returns the stack base of the specified thread. Only call this function
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-- when Stack_Base_Available is True.
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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 := 0;
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PROT_READ : constant := 1;
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PROT_WRITE : constant := 2;
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PROT_EXEC : constant := 4;
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PROT_ALL : constant := PROT_READ + PROT_WRITE + PROT_EXEC;
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PROT_ON : constant := PROT_NONE;
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PROT_OFF : constant := PROT_ALL;
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function mprotect
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(addr : System.Address;
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len : size_t;
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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;
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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_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_NONE : constant := 0;
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PTHREAD_PRIO_INHERIT : 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
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(C, pthread_mutexattr_setprotocol, "pthread_mutexattr_setprotocol");
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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
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(C, pthread_mutexattr_setprioceiling,
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"pthread_mutexattr_setprioceiling");
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type padding is array (int range <>) of Interfaces.C.char;
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type struct_sched_param is record
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sched_priority : int; -- scheduling priority
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opaque : padding (1 .. 4);
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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_attr_setscope
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(attr : access pthread_attr_t;
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contentionscope : int) return int;
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pragma Import (C, pthread_attr_setscope, "pthread_attr_setscope");
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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
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(C, pthread_attr_setinheritsched, "pthread_attr_setinheritsched");
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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 (C, pthread_attr_setschedpolicy, "pthread_attr_setsched");
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function sched_yield return int;
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---------------------------
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-- P1003.1c - Section 16 --
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---------------------------
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function pthread_attr_init (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
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(C, pthread_attr_setdetachstate, "pthread_attr_setdetachstate");
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function pthread_attr_setstacksize
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(attr : access pthread_attr_t;
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stacksize : size_t) return int;
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pragma Import
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(C, pthread_attr_setstacksize, "pthread_attr_setstacksize");
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function pthread_create
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(thread : access pthread_t;
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attributes : access pthread_attr_t;
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start_routine : Thread_Body;
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arg : System.Address) return int;
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pragma Import (C, pthread_create, "pthread_create");
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procedure pthread_exit (status : System.Address);
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pragma Import (C, pthread_exit, "pthread_exit");
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function pthread_self return pthread_t;
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pragma Import (C, pthread_self, "pthread_self");
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--------------------------
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-- POSIX.1c Section 17 --
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--------------------------
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function pthread_setspecific
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(key : pthread_key_t;
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value : System.Address) return int;
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pragma Import (C, pthread_setspecific, "pthread_setspecific");
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function pthread_getspecific (key : pthread_key_t) return System.Address;
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pragma Import (C, pthread_getspecific, "pthread_getspecific");
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type destructor_pointer is access procedure (arg : System.Address);
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pragma Convention (C, destructor_pointer);
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function pthread_key_create
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(key : access pthread_key_t;
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destructor : destructor_pointer) return int;
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pragma Import (C, pthread_key_create, "pthread_key_create");
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|
|
private
|
|
|
|
type sigset_t is new unsigned;
|
|
|
|
type int32_t is new int;
|
|
|
|
type pid_t is new int32_t;
|
|
|
|
type time_t is new long;
|
|
|
|
type timespec is record
|
|
tv_sec : time_t;
|
|
tv_nsec : long;
|
|
end record;
|
|
pragma Convention (C, timespec);
|
|
|
|
--
|
|
-- Darwin specific signal implementation
|
|
--
|
|
type Pad_Type is array (1 .. 7) of unsigned_long;
|
|
type siginfo_t is record
|
|
si_signo : int; -- signal number
|
|
si_errno : int; -- errno association
|
|
si_code : int; -- signal code
|
|
si_pid : int; -- sending process
|
|
si_uid : unsigned; -- sender's ruid
|
|
si_status : int; -- exit value
|
|
si_addr : System.Address; -- faulting instruction
|
|
si_value : System.Address; -- signal value
|
|
si_band : long; -- band event for SIGPOLL
|
|
pad : Pad_Type; -- RFU
|
|
end record;
|
|
pragma Convention (C, siginfo_t);
|
|
|
|
type mcontext_t is new System.Address;
|
|
|
|
type ucontext_t is record
|
|
uc_onstack : int;
|
|
uc_sigmask : sigset_t; -- Signal Mask Used By This Context
|
|
uc_stack : stack_t; -- Stack Used By This Context
|
|
uc_link : System.Address; -- Pointer To Resuming Context
|
|
uc_mcsize : size_t; -- Size of The Machine Context
|
|
uc_mcontext : mcontext_t; -- Machine Specific Context
|
|
end record;
|
|
pragma Convention (C, ucontext_t);
|
|
|
|
--
|
|
-- Darwin specific pthread implementation
|
|
--
|
|
type pthread_t is new System.Address;
|
|
|
|
type pthread_attr_t is record
|
|
sig : long;
|
|
opaque : padding (1 .. System.OS_Constants.PTHREAD_ATTR_SIZE);
|
|
end record;
|
|
pragma Convention (C, pthread_attr_t);
|
|
|
|
type pthread_mutexattr_t is record
|
|
sig : long;
|
|
opaque : padding (1 .. System.OS_Constants.PTHREAD_MUTEXATTR_SIZE);
|
|
end record;
|
|
pragma Convention (C, pthread_mutexattr_t);
|
|
|
|
type pthread_mutex_t is record
|
|
sig : long;
|
|
opaque : padding (1 .. System.OS_Constants.PTHREAD_MUTEX_SIZE);
|
|
end record;
|
|
pragma Convention (C, pthread_mutex_t);
|
|
|
|
type pthread_condattr_t is record
|
|
sig : long;
|
|
opaque : padding (1 .. System.OS_Constants.PTHREAD_CONDATTR_SIZE);
|
|
end record;
|
|
pragma Convention (C, pthread_condattr_t);
|
|
|
|
type pthread_cond_t is record
|
|
sig : long;
|
|
opaque : padding (1 .. System.OS_Constants.PTHREAD_COND_SIZE);
|
|
end record;
|
|
pragma Convention (C, pthread_cond_t);
|
|
|
|
type pthread_once_t is record
|
|
sig : long;
|
|
opaque : padding (1 .. System.OS_Constants.PTHREAD_ONCE_SIZE);
|
|
end record;
|
|
pragma Convention (C, pthread_once_t);
|
|
|
|
type pthread_key_t is new unsigned_long;
|
|
|
|
end System.OS_Interface;
|