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- ------------------------------------------------------------------------------
- -- --
- -- GNU ADA RUNTIME LIBRARY (GNARL) COMPONENTS --
- -- --
- -- S Y S T E M . O S 2 L I B . T H R E A D S --
- -- --
- -- S p e c --
- -- --
- -- $Revision: 1.6 $ --
- -- --
- -- Copyright (c) 1993,1994,1995 NYU, All Rights Reserved --
- -- --
- -- GNARL is free software; you can redistribute it and/or modify it under --
- -- terms of the GNU Library General Public License as published by the --
- -- Free Software Foundation; either version 2, or (at your option) any --
- -- later version. GNARL is distributed in the hope that it will be use- --
- -- ful, but but WITHOUT ANY WARRANTY; without even the implied warranty of --
- -- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Gen- --
- -- eral Library Public License for more details. You should have received --
- -- a copy of the GNU Library General Public License along with GNARL; see --
- -- file COPYING. If not, write to the Free Software Foundation, 675 Mass --
- -- Ave, Cambridge, MA 02139, USA. --
- -- --
- ------------------------------------------------------------------------------
-
- with Interfaces.C;
-
- package System.OS2Lib.Threads is
- pragma Preelaborate (Threads);
-
- use Interfaces.C;
-
- type PID is new unsigned_long;
- type PPID is access all PID;
- -- Process ID, and pointer to process ID
-
- type TID is new unsigned_long;
- type PTID is access all TID;
- -- Thread ID, and pointer to thread ID
-
- -------------------------------------------------------------
- -- Thread Creation, Activation, Suspension And Termination --
- -------------------------------------------------------------
-
- -- Note: <bsedos.h> defines the "Informations" and "param" parameter below
- -- as a ULONG, but everyone knows that in general an address will be passed
- -- to it. We declared it here with type PVOID (which it should have had)
- -- because Ada is a bit more sensitive to mixing integers and addresses.
-
- type PFNTHREAD is access procedure (Informations : System.Address);
- -- TBSL should use PVOID instead of Address as per above node ???
-
- function DosCreateThread
- (F_ptid : PTID;
- pfn : PFNTHREAD;
- param : PVOID;
- flag : ULONG;
- cbStack : ULONG)
- return APIRET;
- pragma Import (C, DosCreateThread, "DosCreateThread");
-
- Block_child : constant := 1;
- No_Block_child : constant := 0;
- Commit_stack : constant := 2;
- No_Commit_stack : constant := 0;
- -- Values for "flag" parameter in DosCreateThread call
-
- procedure DosExit (Action : ULONG; Result : ULONG);
- pragma Import (C, DosExit, "DosExit");
-
- EXIT_THREAD : constant := 0;
- EXIT_PROCESS : constant := 1;
- -- Values for "Action" parameter in Dos_Exit call
-
- function DosResumeThread (Id : TID) return APIRET;
- pragma Import (C, DosResumeThread, "DosResumeThread");
-
- function DosSuspendThread (Id : TID) return APIRET;
- pragma Import (C, DosSuspendThread, "DosSuspendThread");
-
- procedure DosWaitThread (Thread_Ptr : PTID; Option : ULONG);
- pragma Import (C, DosWaitThread, "DosWaitThread");
-
- DCWW_WAIT : constant := 0;
- DCWW_NOWAIT : constant := 1;
- -- Values for "Option" parameter in DosWaitThread call
-
- ---------------------------------------------------
- -- Accessing properties of Threads and Processes --
- ---------------------------------------------------
-
- -- Structures translated from BSETIB.H
-
- -- Thread Information Block (TIB)
- -- Need documentation clarifying distinction between TIB, TIB2 ???
-
- type TIB2 is record
- tib2_ultid : ULONG; -- Thread I.D.
- tib2_ulpri : ULONG; -- Thread priority
- tib2_version : ULONG; -- Version number for this structure
- tib2_usMCCount : USHORT; -- Must Complete count
- tib2_fMCForceFlag : USHORT; -- Must Complete force flag
- end record;
-
- type PTIB2 is access all TIB2;
-
- -- Thread Information Block (TIB)
-
- type TIB is record
- tib_pexchain : PVOID; -- Head of exception handler chain
- tib_pstack : PVOID; -- Pointer to base of stack
- tib_pstacklimit : PVOID; -- Pointer to end of stack
- tib_ptib2 : PTIB2; -- Pointer to system specific TIB
- tib_version : ULONG; -- Version number for this TIB structure
- tib_ordinal : ULONG; -- Thread ordinal number
- end record;
-
- type PTIB is access all TIB;
-
- -- Process Information Block (PIB)
-
- type PIB is record
- pib_ulpid : ULONG; -- Process I.D.
- pib_ulppid : ULONG; -- Parent process I.D.
- pib_hmte : ULONG; -- Program (.EXE) module handle
- pib_pchcmd : PCHAR; -- Command line pointer
- pib_pchenv : PCHAR; -- Environment pointer
- pib_flstatus : ULONG; -- Process' status bits
- pib_ultype : ULONG; -- Process' type code
- end record;
-
- type PPIB is access all PIB;
-
- function DosGetInfoBlocks
- (Pptib : access PTIB;
- Pppib : access PPIB)
- return APIRET;
- pragma Import (C, DosGetInfoBlocks, "DosGetInfoBlocks");
-
- -----------------
- -- Priorities --
- -----------------
-
- function DosSetPriority
- (Scope : ULONG;
- Class : ULONG;
- Delta_P : long;
- PorTid : TID)
- return APIRET;
- pragma Import (C, DosSetPriority, "DosSetPriority");
-
- PRTYS_PROCESS : constant := 0;
- PRTYS_PROCESSTREE : constant := 1;
- PRTYS_THREAD : constant := 2;
- -- Values for "Scope" parameter in DosSetPriority call
-
- PRTYC_NOCHANGE : constant := 0;
- PRTYC_IDLETIME : constant := 1;
- PRTYC_REGULAR : constant := 2;
- PRTYC_TIMECRITICAL : constant := 3;
- PRTYC_FOREGROUNDSERVER : constant := 4;
- -- Values for "class" parameter in DosSetPriority call
-
- end System.OS2Lib.Threads;
-