Reconstruction method capable of reducing non-reentrant functions

Abstract

The invention relates to a reconstruction method capable of reducing non-reentrant functions. The reconstruction method includes following steps: S10, realizing a calling relation among functions through external interface analysis, and recognizing all non-reentrant functions; S20, constructing a function calling relation mapping table, and classifying the non-reentrant functions by taking different global resources as a classifying basis; S30, constructing a packaging function alone for every kind of global resources, and taking the packaging function as a new calling interface for corresponding non-reentrant functions to call. The reconstruction method has the advantages that non-reentrant functions in a software module are reduced effectively, and risk of resource conflict during multitask running is lowered; coupling degree among the functions is further lowered, and code testability is improved; access entrances of the functions to the global resources are more centralized, and programs are easy in monitoring and tracking during running; a function calling relation after reconstruction is clearer.

Description

Technical field [0001] The invention relates to the field of vehicle-mounted broadcast signal modulation and reception, in particular to a reconstruction method for reducing non-reentrant functions. Background technique [0002] At present, most embedded products use a multi-task preemptive system. In this multi-task preemptive software environment, it is particularly important to avoid the conflict of global resource preemption. Inevitably, there are more or less non-reentrant functions in the system. Because non-reentrant functions access global resources, they are likely to cause resource conflicts when they are called concurrently by multiple tasks. [0003] The greater the number of non-reentrant functions, the greater the risk of resource conflicts and the lower the system stability. Therefore, some methods are needed to reduce non-reentrant functions in software modules to reduce the risk of resource conflicts. Summary of the invention [0004] In order to solve the above te...

AI Technical Summary

Problems solved by technology

Inevitably, there are more or less non-reentrant functions in the system. Since the non-reentrant functions access global resources, when they are called concurrently by multiple tasks, it is easy to cause resource conflicts.

[0003] The greater the number of non-reentrant functions, the greater the risk of resource conflicts and the lower the system stability. Therefore, some methods need to be used to reduce the non-reentrant functions in software modules to reduce the risk of resource conflicts

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