Wireless terminal database establishing method based on shared memory design

Abstract

The invention relates to a wireless terminal database establishing method based on shared memory design. The method comprises the following steps that 1) user tables of wireless terminals are divided, and the IDs of the wireless terminals are distributed through a bitmap; 2) the IDs distributed through the bitmap are used for identifying keywords of the wireless terminals, and a non-pointer chain table is used for sharing Hash tables in a memory in a traversal mode; and 3) a flag bit is set for each course in the shared memory and is used for identifying whether the course locks terminal data in the shared memory, after the course restarts to load the shared memory, whether the flag bit is locked is detected, and if yes, unlocking is carried out first. Compared with the prior art, the method has the advantages that memory space is saved, the phenomenon that multi-process space loading shared memory access border crossing caused by a pointer is avoided, and the problem that a critical zone information lock cannot be released forever caused by the fact that a critical zone, namely the shared memory is accessed in a multi-process mode is solved.

Description

technical field [0001] The invention relates to a wireless terminal database construction method, in particular to a wireless terminal database construction method based on shared memory design. Background technique [0002] In wireless terminal data management, the terminal's mac, ip, traffic, duration, etc. need to be supervised, and multiple business processes use shared memory to access the data information of these terminals. Compared with other storage media, the access speed of shared memory is greatly improved . [0003] If the traditional shared memory free space allocation uses the linked list method, the structure of the linked list itself needs to occupy a large amount of memory in the shared memory. For the shared memory that is in short supply in the critical section, it is necessary to optimize the size of the shared memory more reasonably. [0004] The traditional shared memory space is loaded by multiple processes. The address is either randomly allocated a...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a wireless terminal database construction method based on shared memory design in order to overcome the defects of the above-mentioned prior art, save memory space, avoid the situation that multi-process space loading shared memory access is out of bounds due to pointers, Solve the problem that the critical section information lock can never be released caused by multiple processes accessing the critical section of shared memory

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