How to Calculate semaphore ids and release them in DCS?

Answer

The following solution will indicate how to calculate a semaphore key for a program in DCS.


The formula which is used to calculate the semaphore key is :

RetVal = LineNo * 100000 + Offset ;

LineNo ==> Line Value from $DCS_BASE/files/config/whse.map file for that Whse .
Offset ==> semaphore values that are given in the list above are Offset values for this formula.


Hexadecimal Equivalent of Semaphore for program = Hexadecimal equivalent of (RetVal)

You will need to get the key corresponding to the program. Each program uses a different semaphore and the key used can be got from code. Some typical programs, Semaphore keys and their values are given below:

Program Name Semaphore Key
----------------------- ------------------------
intbu056 208
intbu079 200
intbu081 201
intbu083 205
intbu087 206
intbu088 202
intbu091 203
intbu093 204
intbu101 207
intbu103 42
mahainterface 111
mahapurg 106
wh120 83
wh124 86
wh126 94
wh129 50
wh132 92
wh142 98
wh143 88
wh145 58
wh217 99
wh220 100
wh251 95
wh307 97
wh311 97
wh741 96
wh742 52
wh743 54
wh744 56
wh856 84
wh857 86
whbu010 01207
whbu022 101
whbu023 102
whbu024 103
whbu025 104
whbu026 105
whbu027 107
whbu028 110
whbu089 108
whbu202 91
whbu298 80
whbu372 60
whbu500 82
who07 76
whfbu64 90
whbu501 00761
whbu502 08096


whbu010 has a semaphore key whose value was 01207. Therefore the number in ( ) corresponding to whbu010 is (linevalue * 100000) + 01207 = 12201207


get the hex equivalent of the above number(u can use the calculator).

To find the semaphore number for the hex equivalet do:
ipcs | grep <hex. eqvt.>


Check if the program is running. If not release the semaphore with the command:
ipcrm -s <Semaphore #>

e.g.
ipcrm -s 98442.

Repeat for other programs that are not running but register this error.
Submit the program again, if needed.