Shared Variables are a feature of the programming language APL which allows APL programs running on one processor to share information with another processor.[1] Although originally developed for mainframe computers, Shared Variables were also used in personal computer implementations of APL.[1] Shared Variables could be used to control peripheral devices, or to communicate with external files, database management systems, or other users.[1] Shared Variables were first introduced by International Business Machines Corporation (IBM) in their APL.SV software product in 1973,[2] and are still available as of 2017[update], in APLs from IBM and Dyalog,[3] for the operating systems Linux and Windows.
^ abcAllen Kent; James G. Williams, eds. (1987). "APL for Microcomputers". Encyclopedia of Microcomputers. Vol. 1. pp. 206–207. ISBN 0824727002.
^A.D. Falkoff; K.E. Iverson (1973). "The Design of APL". IBM Journal of Research and Development. 17 (4): 324–334. doi:10.1147/rd.174.0324. Retrieved 2017-12-11.
SharedVariables are a feature of the programming language APL which allows APL programs running on one processor to share information with another processor...
using virtual memory Shared-variable approach using routines to access sharedvariables Object-based approach, ideally accessing shared data through object-oriented...
all global variables is known as the global environment or global state. In compiled languages, global variables are generally static variables, whose extent...
function), on the values of other variables. Independent variables, in turn, are not seen as depending on any other variable in the scope of the experiment...
In statistics, latent variables (from Latin: present participle of lateo, “lie hidden”) are variables that can only be inferred indirectly through a mathematical...
environment variable is a user-definable value that can affect the way running processes will behave on a computer. Environment variables are part of...
explicitly parallel execution model A shared address space (shared storage qualifier) with thread-local parts (normal variables) Synchronization primitives and...
has class sharedvariables and namespace sharedvariables, while Squeak and many other implementations have class variables, pool variables and global...
lifetime. In many languages, global variables are always static, but in some languages they are dynamic, while local variables are generally automatic, but may...
store/write performed to allow other processors to use the sharedvariables. Among synchronization variables, sequential consistency or processor consistency can...
A shared library or shared object is a computer file that contains executable code designed to be used by multiple computer programs or other libraries...
saving of state information in variables local to each execution, usually on a stack, instead of in static or global variables or other non-local state. All...
OpenMP is a shared memory programming model, most variables in OpenMP code are visible to all threads by default. But sometimes private variables are necessary...
special locking mechanism used in Linux for supporting fast writes of sharedvariables between two parallel operating system routines. The semantics stabilized...
same values for all variablesshared by two constraints. If two dual variables correspond to constraints sharing some variables, the dual problem contains...
of programming, Spark provides two restricted forms of sharedvariables: broadcast variables reference read-only data that needs to be available on all...
processes. The PAT process language extends CSP with support for mutable sharedvariables, asynchronous message passing, and a variety of fairness and quantitative...
all other instances. A class may have both instance variables and class variables. Instance variables can be used by all instance methods of an object,...
distinguished into two types: class variables (also called static member variables), where only one copy of the variable is shared with all instances of the class;...
concurrent accesses to shared resources can lead to unexpected or erroneous behavior. Thus, the parts of the program where the shared resource is accessed...
of Network SharedVariable Processor (NSVP) in 1984. This allowed APL programs running on different hosts to communicate via SharedVariables. The Beta...
The algorithm is designed to achieve fairness when a limited resource is shared, for example to prevent flows with large packets or processes that generate...