A memory management method and system

Abstract

The invention discloses a memory management method. The memory management method comprises the steps that according to a memory applying method, whether free memory blocks exist in a memory free chain table of corresponding specification or not is looked up according to the memory applying demand in service information, if yes, one free memory block is removed from the memory free chain table, and if not, one free memory block is removed from the memory free chain table; the corresponding free memory block is applied from a system; the free memory block is allocated to memory storage data information and is added to a memory usage chain table of a module number service belongs to; according to a memory releasing method, the memory blocks to be released are removed from the memory usage chain table of the module number; the memory blocks are emptied and reduced to be in a free memory block state; according to the sizes of the memory blocks, the memory blocks are linked to the memory free chain table of corresponding specification. In addition, the invention further provides a memory management system. By adopting the method and the system, the memory fragmentation problem is avoided, and the memory applying release efficiency is improved.

Description

technical field [0001] The invention relates to the field of memory, in particular to a memory management method and system. Background technique [0002] In the field of industrial control and embedded applications, the real-time performance of the system is highly required. Since the memory resources of the system are limited, when the application software occupies too much memory, the real-time performance of the system will be reduced, which may bring serious problems to the entire system. Therefore, in order to ensure the real-time performance of the system, the memory usage of the application system must be controlled, and at the same time, the memory must be quickly applied and released. [0003] At present, the commonly used memory application interface is to directly allocate memory blocks from the system heap. Specifically, the operating system first finds a memory space larger than the required memory size from the managed memory to the user, then builds an index,...

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Problems solved by technology

[0004] The present invention provides a memory management method and system, which are used to solve the problems existing in the prior art, such as low memory application and release rate, many memory fragments, and difficulty in locating memory faults.

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