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+------------------------------------------------------------------------------
+-- --
+-- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
+-- --
+-- S Y S T E M . O S _ I N T E R F A C E --
+-- --
+-- S p e c --
+-- --
+-- Copyright (C) 1991-1994, Florida State University --
+-- Copyright (C) 1995-2011, Free Software Foundation, Inc. --
+-- --
+-- GNARL 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. GNARL 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/>. --
+-- --
+-- GNARL was developed by the GNARL team at Florida State University. --
+-- Extensive contributions were provided by Ada Core Technologies, Inc. --
+-- --
+------------------------------------------------------------------------------
+
+-- This is the VxWorks version of this package
+
+-- This package encapsulates all direct interfaces to OS services
+-- that are needed by the tasking run-time (libgnarl).
+
+-- PLEASE DO NOT add any with-clauses to this package or remove the pragma
+-- Preelaborate. This package is designed to be a bottom-level (leaf) package.
+
+with Interfaces.C;
+with System.VxWorks;
+with System.VxWorks.Ext;
+with System.Multiprocessors;
+
+package System.OS_Interface is
+ pragma Preelaborate;
+
+ subtype int is Interfaces.C.int;
+ subtype unsigned is Interfaces.C.unsigned;
+ subtype short is Short_Integer;
+ type unsigned_int is mod 2 ** int'Size;
+ type long is new Long_Integer;
+ type unsigned_long is mod 2 ** long'Size;
+ type long_long is new Long_Long_Integer;
+ type unsigned_long_long is mod 2 ** long_long'Size;
+ type size_t is mod 2 ** Standard'Address_Size;
+
+ -----------
+ -- Errno --
+ -----------
+
+ function errno return int;
+ pragma Import (C, errno, "errnoGet");
+
+ EINTR : constant := 4;
+ EAGAIN : constant := 35;
+ ENOMEM : constant := 12;
+ EINVAL : constant := 22;
+ ETIMEDOUT : constant := 60;
+
+ FUNC_ERR : constant := -1;
+
+ ----------------------------
+ -- Signals and interrupts --
+ ----------------------------
+
+ NSIG : constant := 64;
+ -- Number of signals on the target OS
+ type Signal is new int range 0 .. Interfaces.C."-" (NSIG, 1);
+
+ Max_HW_Interrupt : constant := System.VxWorks.Num_HW_Interrupts - 1;
+ type HW_Interrupt is new int range 0 .. Max_HW_Interrupt;
+
+ Max_Interrupt : constant := Max_HW_Interrupt;
+
+ -- Signals common to Vxworks 5.x and 6.x
+
+ SIGILL : constant := 4; -- illegal instruction (not reset when caught)
+ SIGABRT : constant := 6; -- used by abort, replace SIGIOT in the future
+ SIGFPE : constant := 8; -- floating point exception
+ SIGBUS : constant := 10; -- bus error
+ SIGSEGV : constant := 11; -- segmentation violation
+
+ -- Signals specific to VxWorks 6.x
+
+ SIGHUP : constant := 1; -- hangup
+ SIGINT : constant := 2; -- interrupt
+ SIGQUIT : constant := 3; -- quit
+ SIGTRAP : constant := 5; -- trace trap (not reset when caught)
+ SIGEMT : constant := 7; -- EMT instruction
+ SIGKILL : constant := 9; -- kill
+ SIGFMT : constant := 12; -- STACK FORMAT ERROR (not posix)
+ SIGPIPE : constant := 13; -- write on a pipe with no one to read it
+ SIGALRM : constant := 14; -- alarm clock
+ SIGTERM : constant := 15; -- software termination signal from kill
+ SIGCNCL : constant := 16; -- pthreads cancellation signal
+ SIGSTOP : constant := 17; -- sendable stop signal not from tty
+ SIGTSTP : constant := 18; -- stop signal from tty
+ SIGCONT : constant := 19; -- continue a stopped process
+ SIGCHLD : constant := 20; -- to parent on child stop or exit
+ SIGTTIN : constant := 21; -- to readers pgrp upon background tty read
+ SIGTTOU : constant := 22; -- like TTIN for output
+
+ SIGRES1 : constant := 23; -- reserved signal number (Not POSIX)
+ SIGRES2 : constant := 24; -- reserved signal number (Not POSIX)
+ SIGRES3 : constant := 25; -- reserved signal number (Not POSIX)
+ SIGRES4 : constant := 26; -- reserved signal number (Not POSIX)
+ SIGRES5 : constant := 27; -- reserved signal number (Not POSIX)
+ SIGRES6 : constant := 28; -- reserved signal number (Not POSIX)
+ SIGRES7 : constant := 29; -- reserved signal number (Not POSIX)
+
+ SIGUSR1 : constant := 30; -- user defined signal 1
+ SIGUSR2 : constant := 31; -- user defined signal 2
+
+ SIGPOLL : constant := 32; -- pollable event
+ SIGPROF : constant := 33; -- profiling timer expired
+ SIGSYS : constant := 34; -- bad system call
+ SIGURG : constant := 35; -- high bandwidth data is available at socket
+ SIGVTALRM : constant := 36; -- virtual timer expired
+ SIGXCPU : constant := 37; -- CPU time limit exceeded
+ SIGXFSZ : constant := 38; -- file size time limit exceeded
+
+ SIGEVTS : constant := 39; -- signal event thread send
+ SIGEVTD : constant := 40; -- signal event thread delete
+
+ SIGRTMIN : constant := 48; -- Realtime signal min
+ SIGRTMAX : constant := 63; -- Realtime signal max
+
+ -----------------------------------
+ -- Signal processing definitions --
+ -----------------------------------
+
+ -- The how in sigprocmask()
+
+ SIG_BLOCK : constant := 1;
+ SIG_UNBLOCK : constant := 2;
+ SIG_SETMASK : constant := 3;
+
+ -- The sa_flags in struct sigaction
+
+ SA_SIGINFO : constant := 16#0002#;
+ SA_ONSTACK : constant := 16#0004#;
+
+ SIG_DFL : constant := 0;
+ SIG_IGN : constant := 1;
+
+ type sigset_t is private;
+
+ type struct_sigaction is record
+ sa_handler : System.Address;
+ sa_mask : sigset_t;
+ sa_flags : int;
+ end record;
+ pragma Convention (C, struct_sigaction);
+ type struct_sigaction_ptr is access all struct_sigaction;
+
+ function sigaddset (set : access sigset_t; sig : Signal) return int;
+ pragma Import (C, sigaddset, "sigaddset");
+
+ function sigdelset (set : access sigset_t; sig : Signal) return int;
+ pragma Import (C, sigdelset, "sigdelset");
+
+ function sigfillset (set : access sigset_t) return int;
+ pragma Import (C, sigfillset, "sigfillset");
+
+ function sigismember (set : access sigset_t; sig : Signal) return int;
+ pragma Import (C, sigismember, "sigismember");
+
+ function sigemptyset (set : access sigset_t) return int;
+ pragma Import (C, sigemptyset, "sigemptyset");
+
+ function sigaction
+ (sig : Signal;
+ act : struct_sigaction_ptr;
+ oact : struct_sigaction_ptr) return int;
+ pragma Import (C, sigaction, "sigaction");
+
+ type isr_address is access procedure (sig : int);
+ pragma Convention (C, isr_address);
+
+ function c_signal (sig : Signal; handler : isr_address) return isr_address;
+ pragma Import (C, c_signal, "signal");
+
+ function sigwait (set : access sigset_t; sig : access Signal) return int;
+ pragma Inline (sigwait);
+
+ function pthread_sigmask
+ (how : int;
+ set : access sigset_t;
+ oset : access sigset_t) return int;
+ pragma Import (C, pthread_sigmask, "sigprocmask");
+
+ subtype t_id is System.VxWorks.Ext.t_id;
+ subtype Thread_Id is t_id;
+
+ function kill (pid : t_id; sig : Signal) return int;
+ pragma Inline (kill);
+
+ function getpid return t_id renames System.VxWorks.Ext.getpid;
+
+ function Task_Stop (tid : t_id) return int
+ renames System.VxWorks.Ext.Task_Stop;
+ -- If we are in the kernel space, stop the task whose t_id is
+ -- given in parameter in such a way that it can be examined by the
+ -- debugger. This typically maps to taskSuspend on VxWorks 5 and
+ -- to taskStop on VxWorks 6.
+
+ function Task_Cont (tid : t_id) return int
+ renames System.VxWorks.Ext.Task_Cont;
+ -- If we are in the kernel space, continue the task whose t_id is
+ -- given in parameter if it has been stopped previously to be examined
+ -- by the debugger (e.g. by taskStop). It typically maps to taskResume
+ -- on VxWorks 5 and to taskCont on VxWorks 6.
+
+ function Int_Lock return int renames System.VxWorks.Ext.Int_Lock;
+ -- If we are in the kernel space, lock interrupts. It typically maps to
+ -- intLock.
+
+ function Int_Unlock return int renames System.VxWorks.Ext.Int_Unlock;
+ -- If we are in the kernel space, unlock interrupts. It typically maps to
+ -- intUnlock.
+
+ ----------
+ -- Time --
+ ----------
+
+ type time_t is new unsigned_long;
+
+ type timespec is record
+ ts_sec : time_t;
+ ts_nsec : long;
+ end record;
+ pragma Convention (C, timespec);
+
+ type clockid_t is new int;
+
+ function To_Duration (TS : timespec) return Duration;
+ pragma Inline (To_Duration);
+
+ function To_Timespec (D : Duration) return timespec;
+ pragma Inline (To_Timespec);
+
+ function To_Clock_Ticks (D : Duration) return int;
+ -- Convert a duration value (in seconds) into clock ticks
+
+ function clock_gettime
+ (clock_id : clockid_t; tp : access timespec) return int;
+ pragma Import (C, clock_gettime, "clock_gettime");
+
+ ----------------------
+ -- Utility Routines --
+ ----------------------
+
+ function To_VxWorks_Priority (Priority : int) return int;
+ pragma Inline (To_VxWorks_Priority);
+ -- Convenience routine to convert between VxWorks priority and Ada priority
+
+ --------------------------
+ -- VxWorks specific API --
+ --------------------------
+
+ subtype STATUS is int;
+ -- Equivalent of the C type STATUS
+
+ OK : constant STATUS := 0;
+ ERROR : constant STATUS := Interfaces.C.int (-1);
+
+ function taskIdVerify (tid : t_id) return STATUS;
+ pragma Import (C, taskIdVerify, "taskIdVerify");
+
+ function taskIdSelf return t_id;
+ pragma Import (C, taskIdSelf, "taskIdSelf");
+
+ function taskOptionsGet (tid : t_id; pOptions : access int) return int;
+ pragma Import (C, taskOptionsGet, "taskOptionsGet");
+
+ function taskSuspend (tid : t_id) return int;
+ pragma Import (C, taskSuspend, "taskSuspend");
+
+ function taskResume (tid : t_id) return int;
+ pragma Import (C, taskResume, "taskResume");
+
+ function taskIsSuspended (tid : t_id) return int;
+ pragma Import (C, taskIsSuspended, "taskIsSuspended");
+
+ function taskDelay (ticks : int) return int;
+ procedure taskDelay (ticks : int);
+ pragma Import (C, taskDelay, "taskDelay");
+
+ function sysClkRateGet return int;
+ pragma Import (C, sysClkRateGet, "sysClkRateGet");
+
+ -- VxWorks 5.x specific functions
+ -- Must not be called from run-time for versions that do not support
+ -- taskVarLib: eg VxWorks 6 RTPs
+
+ function taskVarAdd
+ (tid : t_id; pVar : access System.Address) return int;
+ pragma Import (C, taskVarAdd, "taskVarAdd");
+
+ function taskVarDelete
+ (tid : t_id; pVar : access System.Address) return int;
+ pragma Import (C, taskVarDelete, "taskVarDelete");
+
+ function taskVarSet
+ (tid : t_id;
+ pVar : access System.Address;
+ value : System.Address) return int;
+ pragma Import (C, taskVarSet, "taskVarSet");
+
+ function taskVarGet
+ (tid : t_id;
+ pVar : access System.Address) return int;
+ pragma Import (C, taskVarGet, "taskVarGet");
+
+ -- VxWorks 6.x specific functions
+ -- Can only be called from the VxWorks 6 run-time libary that supports
+ -- tlsLib, and not by the VxWorks 6.6 SMP library
+
+ function tlsKeyCreate return int;
+ pragma Import (C, tlsKeyCreate, "tlsKeyCreate");
+
+ function tlsValueGet (key : int) return System.Address;
+ pragma Import (C, tlsValueGet, "tlsValueGet");
+
+ function tlsValueSet (key : int; value : System.Address) return STATUS;
+ pragma Import (C, tlsValueSet, "tlsValueSet");
+
+ -- Option flags for taskSpawn
+
+ VX_UNBREAKABLE : constant := 16#0002#;
+ VX_FP_PRIVATE_ENV : constant := 16#0080#;
+ VX_NO_STACK_FILL : constant := 16#0100#;
+
+ function taskSpawn
+ (name : System.Address; -- Pointer to task name
+ priority : int;
+ options : int;
+ stacksize : size_t;
+ start_routine : System.Address;
+ arg1 : System.Address;
+ arg2 : int := 0;
+ arg3 : int := 0;
+ arg4 : int := 0;
+ arg5 : int := 0;
+ arg6 : int := 0;
+ arg7 : int := 0;
+ arg8 : int := 0;
+ arg9 : int := 0;
+ arg10 : int := 0) return t_id;
+ pragma Import (C, taskSpawn, "taskSpawn");
+
+ procedure taskDelete (tid : t_id);
+ pragma Import (C, taskDelete, "taskDelete");
+
+ function Set_Time_Slice (ticks : int) return int
+ renames System.VxWorks.Ext.Set_Time_Slice;
+ -- Calls kernelTimeSlice under VxWorks 5.x, VxWorks 653, or in VxWorks 6
+ -- kernel apps. Returns ERROR for RTPs, VxWorks 5 /CERT
+
+ function taskPriorityGet (tid : t_id; pPriority : access int) return int;
+ pragma Import (C, taskPriorityGet, "taskPriorityGet");
+
+ function taskPrioritySet (tid : t_id; newPriority : int) return int;
+ pragma Import (C, taskPrioritySet, "taskPrioritySet");
+
+ -- Semaphore creation flags
+
+ SEM_Q_FIFO : constant := 0;
+ SEM_Q_PRIORITY : constant := 1;
+ SEM_DELETE_SAFE : constant := 4; -- only valid for binary semaphore
+ SEM_INVERSION_SAFE : constant := 8; -- only valid for binary semaphore
+
+ -- Semaphore initial state flags
+
+ SEM_EMPTY : constant := 0;
+ SEM_FULL : constant := 1;
+
+ -- Semaphore take (semTake) time constants
+
+ WAIT_FOREVER : constant := -1;
+ NO_WAIT : constant := 0;
+
+ -- Error codes (errno). The lower level 16 bits are the error code, with
+ -- the upper 16 bits representing the module number in which the error
+ -- occurred. By convention, the module number is 0 for UNIX errors. VxWorks
+ -- reserves module numbers 1-500, with the remaining module numbers being
+ -- available for user applications.
+
+ M_objLib : constant := 61 * 2**16;
+ -- semTake() failure with ticks = NO_WAIT
+ S_objLib_OBJ_UNAVAILABLE : constant := M_objLib + 2;
+ -- semTake() timeout with ticks > NO_WAIT
+ S_objLib_OBJ_TIMEOUT : constant := M_objLib + 4;
+
+ subtype SEM_ID is System.VxWorks.Ext.SEM_ID;
+ -- typedef struct semaphore *SEM_ID;
+
+ -- We use two different kinds of VxWorks semaphores: mutex and binary
+ -- semaphores. A null ID is returned when a semaphore cannot be created.
+
+ function semBCreate (options : int; initial_state : int) return SEM_ID;
+ pragma Import (C, semBCreate, "semBCreate");
+ -- Create a binary semaphore. Return ID, or 0 if memory could not
+ -- be allocated.
+
+ function semMCreate (options : int) return SEM_ID;
+ pragma Import (C, semMCreate, "semMCreate");
+
+ function semDelete (Sem : SEM_ID) return int
+ renames System.VxWorks.Ext.semDelete;
+ -- Delete a semaphore
+
+ function semGive (Sem : SEM_ID) return int;
+ pragma Import (C, semGive, "semGive");
+
+ function semTake (Sem : SEM_ID; timeout : int) return int;
+ pragma Import (C, semTake, "semTake");
+ -- Attempt to take binary semaphore. Error is returned if operation
+ -- times out
+
+ function semFlush (SemID : SEM_ID) return STATUS;
+ pragma Import (C, semFlush, "semFlush");
+ -- Release all threads blocked on the semaphore
+
+ ------------------------------------------------------------
+ -- Binary Semaphore Wrapper to Support interrupt Tasks --
+ ------------------------------------------------------------
+
+ type Binary_Semaphore_Id is new Long_Integer;
+
+ function Binary_Semaphore_Create return Binary_Semaphore_Id;
+ pragma Inline (Binary_Semaphore_Create);
+
+ function Binary_Semaphore_Delete (ID : Binary_Semaphore_Id) return int;
+ pragma Inline (Binary_Semaphore_Delete);
+
+ function Binary_Semaphore_Obtain (ID : Binary_Semaphore_Id) return int;
+ pragma Inline (Binary_Semaphore_Obtain);
+
+ function Binary_Semaphore_Release (ID : Binary_Semaphore_Id) return int;
+ pragma Inline (Binary_Semaphore_Release);
+
+ function Binary_Semaphore_Flush (ID : Binary_Semaphore_Id) return int;
+ pragma Inline (Binary_Semaphore_Flush);
+
+ ------------------------------------------------------------
+ -- Hardware Interrupt Wrappers to Support Interrupt Tasks --
+ ------------------------------------------------------------
+
+ type Interrupt_Handler is access procedure (parameter : System.Address);
+ pragma Convention (C, Interrupt_Handler);
+
+ type Interrupt_Vector is new System.Address;
+
+ function Interrupt_Connect
+ (Vector : Interrupt_Vector;
+ Handler : Interrupt_Handler;
+ Parameter : System.Address := System.Null_Address) return int;
+ pragma Inline (Interrupt_Connect);
+ -- Use this to set up an user handler. The routine installs a user
+ -- handler which is invoked after the OS has saved enough context for a
+ -- high-level language routine to be safely invoked.
+
+ function Interrupt_Context return int;
+ pragma Inline (Interrupt_Context);
+ -- Return 1 if executing in an interrupt context; return 0 if executing in
+ -- a task context.
+
+ function Interrupt_Number_To_Vector (intNum : int) return Interrupt_Vector;
+ pragma Inline (Interrupt_Number_To_Vector);
+ -- Convert a logical interrupt number to the hardware interrupt vector
+ -- number used to connect the interrupt.
+
+ --------------------------------
+ -- Processor Affinity for SMP --
+ --------------------------------
+
+ function taskCpuAffinitySet (tid : t_id; CPU : int) return int
+ renames System.VxWorks.Ext.taskCpuAffinitySet;
+ -- For SMP run-times the affinity to CPU.
+ -- For uniprocessor systems return ERROR status.
+
+ function taskMaskAffinitySet (tid : t_id; CPU_Set : unsigned) return int
+ renames System.VxWorks.Ext.taskMaskAffinitySet;
+ -- For SMP run-times the affinity to CPU_Set.
+ -- For uniprocessor systems return ERROR status.
+
+ ---------------------
+ -- Multiprocessors --
+ ---------------------
+
+ function Current_CPU return Multiprocessors.CPU;
+ -- Return the id of the current CPU
+
+private
+ type pid_t is new int;
+
+ ERROR_PID : constant pid_t := -1;
+
+ type sigset_t is new System.VxWorks.Ext.sigset_t;
+end System.OS_Interface;