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A device and method for reading and writing shared memory data

A technology of shared memory and data interaction, which is applied in the direction of multi-program device, electronic digital data processing, inter-program communication, etc., can solve problems such as unsuccessful operation, and achieve the effect of avoiding excessive frequency

Active Publication Date: 2021-12-10
BEIJING RES INST OF MECHANICAL & ELECTRICAL TECH
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AI Technical Summary

Problems solved by technology

[0005] The present invention provides a device and method capable of optimizing the interactive reading and writing of shared memory data, which can solve the problem of unsuccessful operation caused by the port being operated while data is being read and written when the shared memory is reading and writing data in the prior art. technical problem

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  • A device and method for reading and writing shared memory data
  • A device and method for reading and writing shared memory data
  • A device and method for reading and writing shared memory data

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Embodiment Construction

[0028] It should be noted that the features of the present application and the features in the embodiments in the present application can be combined with each other in the case of an unable conflict. Next, the technical solutions in the embodiments of the present invention will be described in connection with the drawings of the embodiments of the present invention, and it is understood that the described embodiments are merely the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually illustrative only, and it is not necessary to use any limitation of the invention and its application or use. Based on the embodiments in the present invention, all other embodiments obtained without creative labor are not made in the premise of creative labor.

[0029] like figure 1 , 2 , 3, 4 shows the design methods and apparatus for reading and writing of shared memory data interactive by specific examples.

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Abstract

The present invention provides a device and method capable of optimizing the interactive reading and writing of shared memory data. Firstly, the time test is performed on the shared memory operation steps, and then the writing cycle of data update of the writing terminal device is determined, and then the data is read and written. If the password application is successful, read and write is performed; if the password application fails, the process of applying and releasing the password is cyclically executed at a fixed time interval within a reasonable time until the password application is successful, and the read and write operations are performed. The device and method of the invention can solve the technical problem in the prior art that when the shared memory reads and writes data, the port being operated has data being read and written.

Description

Technical field [0001] The present invention relates to the field of data interaction reliability, in particular, to a device and method for computer data read. Background technique [0002] When multiple devices within the system uses shared memory access or shared double-port operation, the shared data operation design process is: A device-end application signal N (hard instruction signal), the application is successful, updated the shared area data, and sets the data update flag. , Release the signal light; apply for failure to release the signal light immediately and determine the data update failed. The B device ends the signal N. If the application is successful, it is determined that the data update flag is valid, and the data is obtained, clear the data update flag, the signal application failure, or no data update flags determine that the acquisition data failed. [0003] The shared memory data interaction between the system device uses the above mode. When the A and B i...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F9/54G06F11/32
CPCG06F9/544G06F11/325
Inventor 杨丽霞杨尚霖刘通
Owner BEIJING RES INST OF MECHANICAL & ELECTRICAL TECH
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