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A call graph generated for a simple computer program in Python. A call graph (also known as a call multigraph [1] [2]) is a control-flow graph, [3] which represents calling relationships between subroutines in a computer program. Each node represents a procedure and each edge (f, g) indicates that procedure f calls procedure g.
Control flow: horizontal arrow with the 'call' prefix, dashed arrow for reply symbol, method and suspension symbols in between. Call operation in an MSC; Timers: start, cancel, time out. Time interval: relative and absolute with a dashed vertical arrow. Time constraint in an MSC
A program is executed sequentially by following a sequence of commands, while maintaining an implicit state, i.e. the global memory. FCL has no concept of procedures, but does provide conditional and unconditional jumps. FCL lives up to its name as the abstract call-graph of an FCL program is a straightforward flow chart.
In computer science, control flow (or flow of control) is the order in which individual statements, instructions or function calls of an imperative program are executed or evaluated. The emphasis on explicit control flow distinguishes an imperative programming language from a declarative programming language.
Freeswitch, an open-source telephony platform, can make use of Lua as a scripting language for call control and call flow among other things. Garry's Mod, a sandbox video game, uses Lua for mods, called addons, published on the Steam Workshop. Geany, a code editor, has a Lua plugin, GeanyLua.
Call flow for the mobile terminated Short Message Service. The figure to the right depicts a call flow for mobile-terminated Short Message delivery. [1] For the sake of simplicity, some of the interactions between the VMSC and VLR, and VMSC and Handset, have been omitted, and only the case when SMS home routing is not in use is shown.
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A call flow diagram can be drawn with a GUI tool and the presentation layer (typically VoiceXML) can be automatically generated. In addition, these tools normally provide extension mechanisms for software integration, such as an HTTP interface to a website and a Java interface for connecting to a database.