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------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- I N T E R F A C E S . O S 2 L I B . S Y N C H R O N I Z A T I O N --
-- --
-- S p e c --
-- --
-- Copyright (C) 1993-1998 Free Software Foundation, Inc. --
-- --
-- GNAT 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. 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. See the GNU General Public License --
-- for more details. You should have received a copy of the GNU General --
-- Public License distributed with GNAT; 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. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
with Interfaces.OS2Lib.Threads;
package Interfaces.OS2Lib.Synchronization is
pragma Preelaborate (Synchronization);
package IC renames Interfaces.C;
package IOT renames Interfaces.OS2Lib.Threads;
package S renames System;
-- Semaphore Attributes
DC_SEM_SHARED : constant := 16#01#;
-- DosCreateMutex, DosCreateEvent, and DosCreateMuxWait use it to indicate
-- whether the semaphore is shared or private when the PSZ is null
SEM_INDEFINITE_WAIT : constant ULONG := -1;
SEM_IMMEDIATE_RETURN : constant ULONG := 0;
type HSEM is new LHANDLE;
type PHSEM is access all HSEM;
type SEMRECORD is record
hsemCur : HSEM;
ulUser : ULONG;
end record;
type PSEMRECORD is access all SEMRECORD;
-- Quad word structure
-- Originally QWORD is defined as a record containing two ULONGS,
-- the first containing low word and the second for the high word,
-- but it is cleaner to define it as follows:
type QWORD is delta 1.0 range -2.0**63 .. 2.0**63 - 1.0;
type PQWORD is access all QWORD;
type HEV is new HSEM;
type PHEV is access all HEV;
type HMTX is new HSEM;
type PHMTX is access all HMTX;
type HMUX is new HSEM;
type PHMUX is access all HMUX;
type HTIMER is new LHANDLE;
type PHTIMER is access all HTIMER;
-----------------------
-- Critical sections --
-----------------------
function DosEnterCritSec return APIRET;
pragma Import (C, DosEnterCritSec, "DosEnterCritSec");
function DosExitCritSec return APIRET;
pragma Import (C, DosExitCritSec, "DosExitCritSec");
--------------
-- EventSem --
--------------
function DosCreateEventSem
(pszName : PSZ;
f_phev : PHEV;
flAttr : ULONG;
fState : BOOL32)
return APIRET;
pragma Import (C, DosCreateEventSem, "DosCreateEventSem");
function DosOpenEventSem
(pszName : PSZ;
F_phev : PHEV)
return APIRET;
pragma Import (C, DosOpenEventSem, "DosOpenEventSem");
function DosCloseEventSem
(F_hev : HEV)
return APIRET;
pragma Import (C, DosCloseEventSem, "DosCloseEventSem");
function DosResetEventSem
(F_hev : HEV;
pulPostCt : PULONG)
return APIRET;
pragma Import (C, DosResetEventSem, "DosResetEventSem");
function DosPostEventSem
(F_hev : HEV)
return APIRET;
pragma Import (C, DosPostEventSem, "DosPostEventSem");
function DosWaitEventSem
(F_hev : HEV;
ulTimeout : ULONG)
return APIRET;
pragma Import (C, DosWaitEventSem, "DosWaitEventSem");
function DosQueryEventSem
(F_hev : HEV;
pulPostCt : PULONG)
return APIRET;
pragma Import (C, DosQueryEventSem, "DosQueryEventSem");
--------------
-- MutexSem --
--------------
function DosCreateMutexSem
(pszName : PSZ;
F_phmtx : PHMTX;
flAttr : ULONG;
fState : BOOL32)
return APIRET;
pragma Import (C, DosCreateMutexSem, "DosCreateMutexSem");
function DosOpenMutexSem
(pszName : PSZ;
F_phmtx : PHMTX)
return APIRET;
pragma Import (C, DosOpenMutexSem, "DosOpenMutexSem");
function DosCloseMutexSem
(F_hmtx : HMTX)
return APIRET;
pragma Import (C, DosCloseMutexSem, "DosCloseMutexSem");
function DosRequestMutexSem
(F_hmtx : HMTX;
ulTimeout : ULONG)
return APIRET;
pragma Import (C, DosRequestMutexSem, "DosRequestMutexSem");
function DosReleaseMutexSem
(F_hmtx : HMTX)
return APIRET;
pragma Import (C, DosReleaseMutexSem, "DosReleaseMutexSem");
function DosQueryMutexSem
(F_hmtx : HMTX;
F_ppid : IOT.PPID;
F_ptid : IOT.PTID;
pulCount : PULONG)
return APIRET;
pragma Import (C, DosQueryMutexSem, "DosQueryMutexSem");
----------------
-- MuxWaitSem --
----------------
function DosCreateMuxWaitSem
(pszName : PSZ;
F_phmux : PHMUX;
cSemRec : ULONG;
pSemRec : PSEMRECORD;
flAttr : ULONG)
return APIRET;
pragma Import (C, DosCreateMuxWaitSem, "DosCreateMuxWaitSem");
DCMW_WAIT_ANY : constant := 16#02#; -- wait on any event/mutex to occur
DCMW_WAIT_ALL : constant := 16#04#; -- wait on all events/mutexes to occur
-- Values for "flAttr" parameter in DosCreateMuxWaitSem call
function DosOpenMuxWaitSem
(pszName : PSZ;
F_phmux : PHMUX)
return APIRET;
pragma Import (C, DosOpenMuxWaitSem, "DosOpenMuxWaitSem");
function DosCloseMuxWaitSem
(F_hmux : HMUX)
return APIRET;
pragma Import (C, DosCloseMuxWaitSem, "DosCloseMuxWaitSem");
function DosWaitMuxWaitSem
(F_hmux : HMUX;
ulTimeout : ULONG;
pulUser : PULONG)
return APIRET;
pragma Import (C, DosWaitMuxWaitSem, "DosWaitMuxWaitSem");
function DosAddMuxWaitSem
(F_hmux : HMUX;
pSemRec : PSEMRECORD)
return APIRET;
pragma Import (C, DosAddMuxWaitSem, "DosAddMuxWaitSem");
function DosDeleteMuxWaitSem
(F_hmux : HMUX;
F_hsem : HSEM)
return APIRET;
pragma Import (C, DosDeleteMuxWaitSem, "DosDeleteMuxWaitSem");
function DosQueryMuxWaitSem
(F_hmux : HMUX;
pcSemRec : PULONG;
pSemRec : PSEMRECORD;
pflAttr : PULONG)
return APIRET;
pragma Import (C, DosQueryMuxWaitSem, "DosQueryMuxWaitSem");
-----------
-- Timer --
-----------
function DosAsyncTimer
(msec : ULONG;
F_hsem : HSEM;
F_phtimer : PHTIMER)
return APIRET;
pragma Import (C, DosAsyncTimer, "DosAsyncTimer");
function DosStartTimer
(msec : ULONG;
F_hsem : HSEM;
F_phtimer : PHTIMER)
return APIRET;
pragma Import (C, DosStartTimer, "DosStartTimer");
function DosStopTimer
(F_htimer : HTIMER)
return APIRET;
pragma Import (C, DosStopTimer, "DosStopTimer");
-- DosTmrQueryTime provides a snapshot of the time
-- from the IRQ0 high resolution timer (Intel 8254)
function DosTmrQueryTime
(pqwTmrTime : access QWORD) -- Time in 8254 ticks (1_192_755.2 Hz)
return APIRET;
pragma Import (C, DosTmrQueryTime, "DosTmrQueryTime");
end Interfaces.OS2Lib.Synchronization;
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