Signal-slot structure for embedded system

Abstract

The invention discloses a signal-slot structure for an embedded system. The signal-slot structure is divided into an upper layer and a lower layer, wherein a signal-slot module is arranged on the upper layer and a memory cell module is arranged on the lower layer; the signal-slot module uses a hash table to manage signals and slots; the memory cell module is used for creating a memory cell, providing necessary memory for the signal-slot module to store related data of the signals and the slots, and recovering the occupied memory when the signals are disassociated from the slots; and the memory cell module manages a memory block through establishing a balanced binary (AVL) tree, and distributes and recovers the memory on the basis of a buddy algorithm. When the signal-slot structure is applied to the embedded system, the signals and the slots can be effectively organized and managed, the time complexity of searching the slots corresponding to the signals is low, and an objective function does not need to be searched by traversing the whole function list like in a traditional method, so that the calling efficiency of the function is improved, componential programing of a system can be realized and the communication efficiency among components can be improved.

Description

technical field [0001] The invention relates to an embedded system, in particular to a signal slot structure for the embedded system. Background technique [0002] The concept of signal slots originally came from the Qt library of Trolltech (now acquired by Nokia). After this concept was put forward, it immediately attracted the attention of the computer science community, and proposed a variety of different implementation methods. "Signal" refers to a flag or notification, and "slot" refers to one or more functions. The relationship between signals and slots can be one-to-one, or one-to-many or many-to-one. . The signal slot mechanism is a powerful tool for component-oriented programming. It can realize the interaction between components, and can easily notify another part of the system to complete related operations in one part of the system. The Qt library is widely used, and the signal slot is still one of the cores of the library. Many other libraries also provide si...

AI Technical Summary

Problems solved by technology

Signal slots are actually language-independent. There are many ways to implement signal slots. Different implementation mechanisms will lead to great differences in signal slots. However, the structure of signal slots used in general-purpose operating systems such as Qt libraries is too complicated. Not suitable for embedded systems

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