| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS -- |
| -- -- |
| -- S Y S T E M . O S _ I N T E R F A C E -- |
| -- -- |
| -- B o d y -- |
| -- -- |
| -- Copyright (C) 1997-2014, 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. GNAT is distributed in the hope that it will be useful, but WITH- -- |
| -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- |
| -- or FITNESS FOR A PARTICULAR PURPOSE. -- |
| -- -- |
| -- As a special exception under Section 7 of GPL version 3, you are granted -- |
| -- additional permissions described in the GCC Runtime Library Exception, -- |
| -- version 3.1, as published by the Free Software Foundation. -- |
| -- -- |
| -- You should have received a copy of the GNU General Public License and -- |
| -- a copy of the GCC Runtime Library Exception along with this program; -- |
| -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- |
| -- <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 |
| |
| -- This package encapsulates all direct interfaces to OS services that are |
| -- needed by children of System. |
| |
| pragma Polling (Off); |
| -- Turn off polling, we do not want ATC polling to take place during tasking |
| -- operations. It causes infinite loops and other problems. |
| |
| package body System.OS_Interface is |
| |
| use type Interfaces.C.int; |
| |
| Low_Priority : constant := 255; |
| -- VxWorks native (default) lowest scheduling priority |
| |
| ----------------- |
| -- To_Duration -- |
| ----------------- |
| |
| function To_Duration (TS : timespec) return Duration is |
| begin |
| return Duration (TS.ts_sec) + Duration (TS.ts_nsec) / 10#1#E9; |
| end To_Duration; |
| |
| ----------------- |
| -- To_Timespec -- |
| ----------------- |
| |
| function To_Timespec (D : Duration) return timespec is |
| S : time_t; |
| F : Duration; |
| |
| begin |
| S := time_t (Long_Long_Integer (D)); |
| F := D - Duration (S); |
| |
| -- If F is negative due to a round-up, adjust for positive F value |
| |
| if F < 0.0 then |
| S := S - 1; |
| F := F + 1.0; |
| end if; |
| |
| return timespec'(ts_sec => S, |
| ts_nsec => long (Long_Long_Integer (F * 10#1#E9))); |
| end To_Timespec; |
| |
| ------------------------- |
| -- To_VxWorks_Priority -- |
| ------------------------- |
| |
| function To_VxWorks_Priority (Priority : int) return int is |
| begin |
| return Low_Priority - Priority; |
| end To_VxWorks_Priority; |
| |
| -------------------- |
| -- To_Clock_Ticks -- |
| -------------------- |
| |
| -- ??? - For now, we'll always get the system clock rate since it is |
| -- allowed to be changed during run-time in VxWorks. A better method would |
| -- be to provide an operation to set it that so we can always know its |
| -- value. |
| |
| -- Another thing we should probably allow for is a resultant tick count |
| -- greater than int'Last. This should probably be a procedure with two |
| -- output parameters, one in the range 0 .. int'Last, and another |
| -- representing the overflow count. |
| |
| function To_Clock_Ticks (D : Duration) return int is |
| Ticks : Long_Long_Integer; |
| Rate_Duration : Duration; |
| Ticks_Duration : Duration; |
| |
| begin |
| if D < 0.0 then |
| return ERROR; |
| end if; |
| |
| -- Ensure that the duration can be converted to ticks |
| -- at the current clock tick rate without overflowing. |
| |
| Rate_Duration := Duration (sysClkRateGet); |
| |
| if D > (Duration'Last / Rate_Duration) then |
| Ticks := Long_Long_Integer (int'Last); |
| else |
| Ticks_Duration := D * Rate_Duration; |
| Ticks := Long_Long_Integer (Ticks_Duration); |
| |
| if Ticks_Duration > Duration (Ticks) then |
| Ticks := Ticks + 1; |
| end if; |
| |
| if Ticks > Long_Long_Integer (int'Last) then |
| Ticks := Long_Long_Integer (int'Last); |
| end if; |
| end if; |
| |
| return int (Ticks); |
| end To_Clock_Ticks; |
| |
| ----------------------------- |
| -- Binary_Semaphore_Create -- |
| ----------------------------- |
| |
| function Binary_Semaphore_Create return Binary_Semaphore_Id is |
| begin |
| return Binary_Semaphore_Id (semBCreate (SEM_Q_FIFO, SEM_EMPTY)); |
| end Binary_Semaphore_Create; |
| |
| ----------------------------- |
| -- Binary_Semaphore_Delete -- |
| ----------------------------- |
| |
| function Binary_Semaphore_Delete (ID : Binary_Semaphore_Id) return int is |
| begin |
| return semDelete (SEM_ID (ID)); |
| end Binary_Semaphore_Delete; |
| |
| ----------------------------- |
| -- Binary_Semaphore_Obtain -- |
| ----------------------------- |
| |
| function Binary_Semaphore_Obtain (ID : Binary_Semaphore_Id) return int is |
| begin |
| return semTake (SEM_ID (ID), WAIT_FOREVER); |
| end Binary_Semaphore_Obtain; |
| |
| ------------------------------ |
| -- Binary_Semaphore_Release -- |
| ------------------------------ |
| |
| function Binary_Semaphore_Release (ID : Binary_Semaphore_Id) return int is |
| begin |
| return semGive (SEM_ID (ID)); |
| end Binary_Semaphore_Release; |
| |
| ---------------------------- |
| -- Binary_Semaphore_Flush -- |
| ---------------------------- |
| |
| function Binary_Semaphore_Flush (ID : Binary_Semaphore_Id) return int is |
| begin |
| return semFlush (SEM_ID (ID)); |
| end Binary_Semaphore_Flush; |
| |
| ---------- |
| -- kill -- |
| ---------- |
| |
| function kill (pid : t_id; sig : Signal) return int is |
| begin |
| return System.VxWorks.Ext.kill (pid, int (sig)); |
| end kill; |
| |
| ----------------------- |
| -- Interrupt_Connect -- |
| ----------------------- |
| |
| function Interrupt_Connect |
| (Vector : Interrupt_Vector; |
| Handler : Interrupt_Handler; |
| Parameter : System.Address := System.Null_Address) return int is |
| begin |
| return |
| System.VxWorks.Ext.Interrupt_Connect |
| (System.VxWorks.Ext.Interrupt_Vector (Vector), |
| System.VxWorks.Ext.Interrupt_Handler (Handler), |
| Parameter); |
| end Interrupt_Connect; |
| |
| ----------------------- |
| -- Interrupt_Context -- |
| ----------------------- |
| |
| function Interrupt_Context return int is |
| begin |
| return System.VxWorks.Ext.Interrupt_Context; |
| end Interrupt_Context; |
| |
| -------------------------------- |
| -- Interrupt_Number_To_Vector -- |
| -------------------------------- |
| |
| function Interrupt_Number_To_Vector |
| (intNum : int) return Interrupt_Vector |
| is |
| begin |
| return Interrupt_Vector |
| (System.VxWorks.Ext.Interrupt_Number_To_Vector (intNum)); |
| end Interrupt_Number_To_Vector; |
| |
| ----------------- |
| -- Current_CPU -- |
| ----------------- |
| |
| function Current_CPU return Multiprocessors.CPU is |
| begin |
| -- ??? Should use vxworks multiprocessor interface |
| |
| return Multiprocessors.CPU'First; |
| end Current_CPU; |
| |
| end System.OS_Interface; |
