obey file
A text file which is input to ROMBUILD, the ROM building tool. It describes what files go to make up the ROM, and how they are laid out, among other things.
OBEX
Object Exchange: a set of high-level protocols allowing objects such as vCard contact information and vCalendar schedule entries to be exchanged using either IrDA (IrOBEX) or Bluetooth® wireless technology. Symbian OS implements IrOBEX for exchange of vCards, for example between a Nokia 9210 Communicator and an Ericsson R380 Smartphone, and vCalendar.
object
In the context of client-server architecture, an object represents a single resource managed by a server. Clients refer to it using a handle.
See also: handle
object container
A home for a set of related reference counting objects.
Adding an object to an object container ensures that it gets assigned a unique id.
See also: object, reference counting object
object container index
This is used to create an object container. It ensures that the object containers it produces generate unique ids within the server.
See also: object container
object index
An object that generates handle numbers for reference counting objects. Used to store objects. Adding an object to an object index returns its id.
See also: object, reference counting object
object owning object container
An object container which owns the subsession objects it contains; it is responsible for their deletion.
See also: object container, subsession object
observer
Receives notification from an agenda model's observer controller whenever an entry or to-do list is added, updated or deleted in the agenda model.
See also: observer controller
observer controller
Notifies all observers that have been registered with the agenda model when an entry or to-do list is added, updated or deleted.
See also: observer
OCSP
Online Certificate Status Protocol, defined in IETF RFC 2560. A communication protocol to determine whether a particular certificate has been revoked.
ODR
Acronym for the One Definition Rule.
See also: One Definition Rule
One Definition Rule
No translation unit (in an application including all its DLLs, statically linked or dynamically loaded) shall
contain more than one definition of any variable, function, class type, enumeration type or template.
A consequence of the One Definition Rule, is that all objects (including variables and functions) that semantically refer to the same C++ object
map onto the same address in object code.
For example, say we have the function, inline int getCounter { static int iCounter = 0; return iCounter++ ; }. If the One Definition
Rule holds, all instances of this in-lined function in an application, including all its dependant binaries (statically linked or dynamically loaded)
will access the same static variable iCounter. Note that in Symbian OS as in Microsoft Windows, the One Definition Rule does not hold;
whereas on Unix and Linux the One Definition Rule does hold.
on event
An event generated by the window server when the machine is switched on.
OOM (out-of-memory)
An error caused when the available RAM has been exhausted, preventing further heap allocation.
opcode
Short for 'operation code', a short code used to represent one of a set of functions.
open font system
A system to allow plug-in support for different font types.
OpenSSL
An open source toolkit implementing the Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) protocols as well as a full-strength general purpose cryptography library.
operation code
An identifier that identifies the type of request being sent from a client to a server.
operation object
An active object that is responsible for an asynchronous request to the Message Server.
option button
A concrete control that may be used to toggle an application state. A group of option buttons may be used to toggle mutually exclusive application states.
See also: check box
OPL
Organiser Programming Language. An open source BASIC-like language that can be used for rapid application development.
OPX
An OPL extension DLL providing language extension procedures.
See also: language extension procedure, OXH, OPL
ordinal
A number which identifies a column in a particular column set or rowset.
See also: column, column set, rowset
ordinal build
A build which produces a DLL export table that indexes functions by ordinal.
See also: DLL, export, DLL export table, name build
ordinal position
The position of a window in the z-order, i.e. from front to back on the screen. The front-most window (the window in the foreground) has an ordinal position of 0.
orientation
Whether page is vertically or horizontally aligned.
See also: portrait, landscape
origin
The top-left corner of a control.
orphan
(1) an object which cannot be accessed either as a local automatic variable, a global variable, via a pointer or as the result of any function call;
(2) to create such an object
Orphaned objects are undesirable as they use unrecoverable system resources. There are two types of orphaned object: objects orphaned on the stack and objects orphaned on the heap. Orphans can be created through program errors, or by a function leaving. It does not matter if T objects are orphaned on the stack. All other orphans are undesirable and, in the case of leave processing, it is essential to ensure that cleanup code handles objects that would otherwise be orphaned.
See also: leave, cleanup
orphan alarm
When a session with the alarm server closes the connection it can orphan the alarm. This alarm will be serviced after the session closes.
An orphan alarm has no session owner and no session is notified when the alarm is due.
See also: Timed alarm, untimed alarm, clock alarm, snoozed alarm, session alarm
OS
Operating System: historically, the minimal set of software needed to manage a device's hardware capability and share it between application programs. Practically, "OS" is now used to mean all software including kernel, device drivers, comms, graphics, data management, GUI framework, system shell application, and utility applications. This would define Windows, Palm OS and MacOS as operating systems. Symbian provides an operating system - Symbian OS - tailored for data-enabled mobile phones.
OTA
Over-the-air (OTA) device management allows an individual or a network operator to make changes to the software setup or configuration of a mobile phone, by 'pushing' a configuration update to the phone via a wireless link. This eliminates the need for docking the phone or going through elaborate synchronization processes and can allow for the simple implementation of firmware upgrades, software distribution, the running of diagnostics and content delivery.
out of line
An agenda entry may be stored inline or out of line. Out of line means that the entry's rich text object is stored in an embedded store in the entry's stream. An agenda entry is set to be stored out of line if its rich text object is large.
See also: inline
own card
A contact item containing information about the device's owner. This can be sent to another compatible electronic device as a vCard.
See also: contact item
owning service
The messaging service that is the ultimate parent of an entry.
owning window group
If a window group is closed while it has the keyboard focus, its owning window group receives the focus. This will be the default owning window group, unless the window group has called SetOwningWindowGroup().
See also: default owning window group
OXH
An OPL header file for inclusion in OPL source code, specifying the public interface to an OPX. Published by the OPX provider.
See also: OPX, language extension procedure
