+++ /dev/null
-------------------------------------------------------------------------------
--- --
--- GNU ADA 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 --
--- --
--- $Revision: 1.2.12.1 $
--- --
--- Copyright (C) 1997-2001 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 2, 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. See the GNU General Public License --
--- for more details. You should have received a copy of the GNU General --
--- Public License distributed with GNARL; see file COPYING. If not, write --
--- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
--- MA 02111-1307, USA. --
--- --
--- As a special exception, if other files instantiate generics from this --
--- unit, or you link this unit with other files to produce an executable, --
--- this unit does not by itself cause the resulting executable to be --
--- covered by the GNU General Public License. This exception does not --
--- however invalidate any other reasons why the executable file might be --
--- covered by the GNU Public License. --
--- --
--- 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.
---
--- VxWorks does not directly support the needed POSIX routines, but it
--- does have other routines that make it possible to code equivalent
--- POSIX compliant routines. The approach taken is to provide an
--- FSU threads compliant interface.
-
--- This package encapsulates all direct interfaces to OS services
--- that are needed by children of System.
-
--- PLEASE DO NOT add any with-clauses to this package
--- or remove the pragma Elaborate_Body.
--- It is designed to be a bottom-level (leaf) package.
-
-with Interfaces.C;
-with System.VxWorks;
-package System.OS_Interface is
- pragma Preelaborate;
-
- subtype int is Interfaces.C.int;
- subtype short is Interfaces.C.short;
- subtype long is Interfaces.C.long;
- subtype unsigned is Interfaces.C.unsigned;
- subtype unsigned_short is Interfaces.C.unsigned_short;
- subtype unsigned_long is Interfaces.C.unsigned_long;
- subtype unsigned_char is Interfaces.C.unsigned_char;
- subtype plain_char is Interfaces.C.plain_char;
- subtype size_t is Interfaces.C.size_t;
- subtype char is Interfaces.C.char;
-
- -----------
- -- 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 --
- ----------------------------
-
- -- In order to support both signal and hardware interrupt handling,
- -- the ranges of "interrupt IDs" for the vectored hardware interrupts
- -- and the signals are catenated. In other words, the external IDs
- -- used to designate signals are relocated beyond the range of the
- -- vectored interrupts. The IDs given in Ada.Interrupts.Names should
- -- be used to designate signals; vectored interrupts are designated
- -- by their interrupt number.
-
- NSIG : constant := 32;
- -- 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 + NSIG;
-
- SIGILL : constant := 4; -- illegal instruction (not reset)
- 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
-
- -----------------------------------
- -- 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#;
-
- -- ANSI args and returns from signal().
- 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);
-
- 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);
-
- type sigset_t_ptr is access all sigset_t;
-
- function pthread_sigmask
- (how : int;
- set : sigset_t_ptr;
- oset : sigset_t_ptr) return int;
- pragma Import (C, pthread_sigmask, "sigprocmask");
-
- ----------
- -- 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 private;
-
- CLOCK_REALTIME : constant clockid_t; -- System wide realtime clock
-
- 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");
-
- -------------------------
- -- Priority Scheduling --
- -------------------------
-
- -- Scheduling policies.
- SCHED_FIFO : constant := 1;
- SCHED_RR : constant := 2;
- SCHED_OTHER : constant := 4;
-
- -------------
- -- Threads --
- -------------
-
- type Thread_Body is access
- function (arg : System.Address) return System.Address;
-
- type pthread_t is private;
- subtype Thread_Id is pthread_t;
-
- null_pthread : constant pthread_t;
-
- type pthread_mutex_t is limited private;
- type pthread_cond_t is limited private;
- type pthread_attr_t is limited private;
- type pthread_mutexattr_t is limited private;
- type pthread_condattr_t is limited private;
- type pthread_key_t is private;
-
- PTHREAD_CREATE_DETACHED : constant := 0;
- PTHREAD_CREATE_JOINABLE : constant := 1;
-
- function kill (pid : pthread_t; sig : Signal) return int;
- pragma Import (C, kill, "kill");
-
- -- VxWorks doesn't have getpid; taskIdSelf is the equivalent
- -- routine.
- function getpid return pthread_t;
- pragma Import (C, getpid, "taskIdSelf");
-
- ---------------------------------
- -- Nonstandard Thread Routines --
- ---------------------------------
-
- procedure pthread_init;
- pragma Inline (pthread_init);
- -- Vxworks requires this for the moment.
-
- function taskIdSelf return pthread_t;
- pragma Import (C, taskIdSelf, "taskIdSelf");
-
- function taskSuspend (tid : pthread_t) return int;
- pragma Import (C, taskSuspend, "taskSuspend");
-
- function taskResume (tid : pthread_t) return int;
- pragma Import (C, taskResume, "taskResume");
-
- function taskIsSuspended (tid : pthread_t) return int;
- pragma Import (C, taskIsSuspended, "taskIsSuspended");
-
- function taskVarAdd
- (tid : pthread_t;
- pVar : access System.Address) return int;
- pragma Import (C, taskVarAdd, "taskVarAdd");
-
- function taskVarDelete
- (tid : pthread_t;
- pVar : access System.Address) return int;
- pragma Import (C, taskVarDelete, "taskVarDelete");
-
- function taskVarSet
- (tid : pthread_t;
- pVar : access System.Address;
- value : System.Address) return int;
- pragma Import (C, taskVarSet, "taskVarSet");
-
- function taskVarGet
- (tid : pthread_t;
- pVar : access System.Address) return int;
- pragma Import (C, taskVarGet, "taskVarGet");
-
- function taskInfoGet
- (tid : pthread_t;
- pTaskDesc : access System.VxWorks.TASK_DESC) return int;
- pragma Import (C, taskInfoGet, "taskInfoGet");
-
- function taskDelay (ticks : int) return int;
- pragma Import (C, taskDelay, "taskDelay");
-
- function sysClkRateGet return int;
- pragma Import (C, sysClkRateGet, "sysClkRateGet");
-
- --------------------------
- -- POSIX.1c Section 11 --
- --------------------------
-
- function pthread_mutexattr_init
- (attr : access pthread_mutexattr_t) return int;
- pragma Inline (pthread_mutexattr_init);
-
- function pthread_mutexattr_destroy
- (attr : access pthread_mutexattr_t) return int;
- pragma Inline (pthread_mutexattr_destroy);
-
- function pthread_mutex_init
- (mutex : access pthread_mutex_t;
- attr : access pthread_mutexattr_t) return int;
- pragma Inline (pthread_mutex_init);
-
- function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int;
- pragma Inline (pthread_mutex_destroy);
-
- function pthread_mutex_lock (mutex : access pthread_mutex_t) return int;
- pragma Inline (pthread_mutex_lock);
-
- function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int;
- pragma Inline (pthread_mutex_unlock);
-
- function pthread_condattr_init
- (attr : access pthread_condattr_t) return int;
- pragma Inline (pthread_condattr_init);
-
- function pthread_condattr_destroy
- (attr : access pthread_condattr_t) return int;
- pragma Inline (pthread_condattr_destroy);
-
- function pthread_cond_init
- (cond : access pthread_cond_t;
- attr : access pthread_condattr_t) return int;
- pragma Inline (pthread_cond_init);
-
- function pthread_cond_destroy (cond : access pthread_cond_t) return int;
- pragma Inline (pthread_cond_destroy);
-
- function pthread_cond_signal (cond : access pthread_cond_t) return int;
- pragma Inline (pthread_cond_signal);
-
- function pthread_cond_wait
- (cond : access pthread_cond_t;
- mutex : access pthread_mutex_t) return int;
- pragma Inline (pthread_cond_wait);
-
- function pthread_cond_timedwait
- (cond : access pthread_cond_t;
- mutex : access pthread_mutex_t;
- abstime : access timespec) return int;
- pragma Inline (pthread_cond_timedwait);
-
- --------------------------
- -- POSIX.1c Section 13 --
- --------------------------
-
- PTHREAD_PRIO_NONE : constant := 0;
- PTHREAD_PRIO_PROTECT : constant := 2;
- PTHREAD_PRIO_INHERIT : constant := 1;
-
- function pthread_mutexattr_setprotocol
- (attr : access pthread_mutexattr_t;
- protocol : int) return int;
- pragma Inline (pthread_mutexattr_setprotocol);
-
- function pthread_mutexattr_setprioceiling
- (attr : access pthread_mutexattr_t;
- prioceiling : int) return int;
- pragma Inline (pthread_mutexattr_setprioceiling);
-
- type struct_sched_param is record
- sched_priority : int;
- end record;
-
- function pthread_setschedparam
- (thread : pthread_t;
- policy : int;
- param : access struct_sched_param) return int;
- pragma Inline (pthread_setschedparam);
-
- function sched_yield return int;
- pragma Inline (sched_yield);
-
- function pthread_sched_rr_set_interval (usecs : int) return int;
- pragma Inline (pthread_sched_rr_set_interval);
-
- ---------------------------
- -- P1003.1c - Section 16 --
- ---------------------------
-
- function pthread_attr_init (attr : access pthread_attr_t) return int;
- pragma Inline (pthread_attr_init);
-
- function pthread_attr_destroy (attr : access pthread_attr_t) return int;
- pragma Inline (pthread_attr_destroy);
-
- function pthread_attr_setdetachstate
- (attr : access pthread_attr_t;
- detachstate : int) return int;
- pragma Inline (pthread_attr_setdetachstate);
-
- function pthread_attr_setstacksize
- (attr : access pthread_attr_t;
- stacksize : size_t) return int;
- pragma Inline (pthread_attr_setstacksize);
-
- function pthread_attr_setname_np
- (attr : access pthread_attr_t;
- name : System.Address) return int;
- -- In VxWorks tasks, we have a non-portable routine to set the
- -- task name. This makes it really convenient for debugging.
- pragma Inline (pthread_attr_setname_np);
-
- function pthread_create
- (thread : access pthread_t;
- attr : access pthread_attr_t;
- start_routine : Thread_Body;
- arg : System.Address) return int;
- pragma Inline (pthread_create);
-
- function pthread_detach (thread : pthread_t) return int;
- pragma Inline (pthread_detach);
-
- procedure pthread_exit (status : System.Address);
- pragma Inline (pthread_exit);
-
- function pthread_self return pthread_t;
- pragma Inline (pthread_self);
-
- function pthread_equal (t1 : pthread_t; t2 : pthread_t) return int;
- pragma Inline (pthread_equal);
- -- be careful not to use "=" on thread_t!
-
- --------------------------
- -- POSIX.1c Section 17 --
- --------------------------
-
- function pthread_setspecific
- (key : pthread_key_t;
- value : System.Address) return int;
- pragma Inline (pthread_setspecific);
-
- function pthread_getspecific (key : pthread_key_t) return System.Address;
- pragma Inline (pthread_getspecific);
-
- type destructor_pointer is access procedure (arg : System.Address);
-
- function pthread_key_create
- (key : access pthread_key_t;
- destructor : destructor_pointer) return int;
- pragma Inline (pthread_key_create);
-
- -- VxWorks binary semaphores. These are exported for use by the
- -- implementation of hardware interrupt handling.
-
- subtype STATUS is int;
- -- Equivalent of the C type STATUS
-
- OK : constant STATUS := 0;
- ERROR : constant STATUS := Interfaces.C."-" (1);
-
- -- 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;
-
- type SEM_ID is new long;
- -- The VxWorks semaphore ID is an integer which is really just
- -- a pointer to a semaphore structure.
-
- function semBCreate (Options : int; Initial_State : int) return SEM_ID;
- -- Create a binary semaphore. Returns ID, or 0 if memory could not
- -- be allocated
- pragma Import (C, semBCreate, "semBCreate");
-
- function semTake (SemID : SEM_ID; Timeout : int) return STATUS;
- -- Attempt to take binary semaphore. Error is returned if operation
- -- times out
- pragma Import (C, semTake, "semTake");
-
- function semGive (SemID : SEM_ID) return STATUS;
- -- Release one thread blocked on the semaphore
- pragma Import (C, semGive, "semGive");
-
- function semFlush (SemID : SEM_ID) return STATUS;
- -- Release all threads blocked on the semaphore
- pragma Import (C, semFlush, "semFlush");
-
- function semDelete (SemID : SEM_ID) return STATUS;
- -- Delete a semaphore
- pragma Import (C, semDelete, "semDelete");
-
-
-private
- -- This interface assumes that "unsigned" and "int" are 32-bit entities.
-
- type sigset_t is new long;
-
- type pid_t is new int;
-
- ERROR_PID : constant pid_t := -1;
-
- type clockid_t is new int;
- CLOCK_REALTIME : constant clockid_t := 0;
-
- -- Priority ceilings are now implemented in the body of
- -- this package.
-
- type pthread_mutexattr_t is record
- Flags : int; -- mutex semaphore creation flags
- Prio_Ceiling : int; -- priority ceiling
- Protocol : int;
- end record;
-
- type pthread_mutex_t is record
- Mutex : SEM_ID;
- Protocol : int;
- Prio_Ceiling : int; -- priority ceiling of lock
- end record;
-
- type pthread_condattr_t is record
- Flags : int;
- end record;
-
- type pthread_cond_t is record
- Sem : SEM_ID; -- VxWorks semaphore ID
- Waiting : Integer; -- Number of queued tasks waiting
- end record;
-
- type pthread_attr_t is record
- Stacksize : size_t;
- Detachstate : int;
- Priority : int;
- Taskname : System.Address;
- end record;
-
- type pthread_t is new long;
-
- null_pthread : constant pthread_t := 0;
-
- type pthread_key_t is new int;
-
- -- These are to store the pthread_keys that are created with
- -- pthread_key_create. Currently, we only need one key.
-
- Key_Storage : array (1 .. 10) of aliased System.Address;
- Keys_Created : Integer;
-
- Time_Slice : int;
-
-end System.OS_Interface;
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