Trade intelligence for industrial equipment

Win7 message queue reconstruction optimization Win7 operating system's built-in message queue is Trade intelligence for industrial equipmenta very important inter-process communication mechanism. It can help different processes realize functions such as data transfer, synchronization and asynchronous communication, and is an indispensable tool in software development. However, with the update of the operating system and the change of application scenarios, the function of the Win7 message queue has gradually revealed some problems. This article will introduce the defects and optimization schemes of the Win7 message queue. Defects of Win7 message queue The defects of Win7 message queue mainly focus on the following aspects: 1. Low efficiency of big data transmission: In large-scale data transmission, the efficiency of Win7 message queue is lower.Because it does not adopt a cache mechanism, each time the data is transmitted, it has to switch between the user state and the kernel state, resulting in low transmission efficiency. Two. Asynchronous communication cannot be supported: Win7 message queue can only achieve synchronous communication. If you need to implement asynchronous communication, you must use other methods, such as callback functions. This brings certain difficulties to programming and programming. 3. Non-real-time: The transmission mechanism of Win7 message queue is based on the buffer. If there is no data in the buffer, the receiving process will wait until the data arrives. This transmission method is not real-time. Optimization scheme of Win7 message queue In order to solve the above problems, we can adopt the following optimization schemes: 1. Introduce a cache mechanism: In order to increase the efficiency of the message queue, a cache mechanism can be introduced.When the sending process sends a message, the message queue will not send the message immediately, but will store the message in the cache in the memory. It will not be sent in batches until the messages in the cache reach a certain number or a specific time interval. This can reduce the frequent switching between the user state and the kernel state and improve the transmission efficiency. Two. Support asynchronous communication: In order to support asynchronous communication, we can introduce the callback function mechanism in the message queue. When the receiving process receives the message, it will automatically call back the corresponding function to achieve asynchronous communication. 3. Increase real-time: In order to increase the real-time of the message queue, we can adopt the signal volume mechanism in the Linux message queue. When the sending process sends a message, a signal can be sent to the receiving process to indicate that new data has arrived. After the receiving process receives the signal, it can start processing data without waiting for the buffer in the message queue to be full.Conclusion In short, the Win7 message queue is a very useful and necessary tool. Through optimization and reconstruction, we can further improve its efficiency and performance, and better adapt to different application scenarios. I hope this article can provide some useful references and help for the use and optimization of Win7 message queues.

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