C/C++ Programmer's Guide (G06.27+, H06.03+)

Glossary
HP C/C++ Programmer’s Guide for NonStop Systems—429301-010
Glossary-9
SCF
and the process terminates abnormally. Other debuggers can create a save file but
refer to the result as a process snapshot file. See also process snapshot file.
SCF. See Subsystem Control Facility (SCF).
scope. The portion of a program in which an identifier is visible (that is, it can be used to
denote a unique entity).
shared run-time library (SRL). An object file or loadfile that the operating system links to a
program file at run time. See also TNS shared run-time library (TNS SRL) and TNS/R
native shared run-time library (TNS/R native SRL).
signal. A software interrupt that provides a way of handling certain events, such as
detection of a hardware (or software) fault, a timer expiration, a lack of system
resources, a process sending a signal to itself, or (for OSS processes) a change in the
execution state of another process or another process sending a signal. A signal is
often an indication of a run-time event that requires immediate attention; many such
events preclude continuing the interrupted instruction stream. Signals are generated
for native Guardian processes and all OSS processes. (TNS Guardian processes
receive traps instead.) The signal mechanism is much richer for OSS than for Guardian
processes. A SIGILL signal indicates that an instruction could not be executed
because the instruction or its data were invalid. Compare with trap.
small-memory model. A program attribute that specifies that the program’s heap is
allocated in the user data segment.
SRL. See shared run-time library (SRL).
statement. A language element that specifies an action.
static storage duration. A storage duration that causes an object to be created and
initialized once, before the program begins execution. The object then exists until the
process terminates execution.
storage duration. The period during which an object exists and retains the value most
recently assigned to it.
Subsystem Control Facility (SCF). An interactive interface for configuring, controlling, and
collecting information from a subsystem and its objects. SCF enables you to configure
and reconfigure devices, processes, and some system variables while your HP
NonStop S-series server is online.
TAL. See Transaction Application Language (TAL).
TNS. Denotes fault-tolerant HP computers that:
•
Support the NonStop OS
•
Are based on microcoded complex instruction-set computing (CISC) technology
TNS systems run the TNS instruction set. Contrast with TNS/R and TNS/E.