A method, device and terminal for sharing data between processes

Abstract

This application discloses a method, device, and terminal for sharing data between processes. This application maps virtual I / O devices to the virtual address spaces of the first process and the second process respectively, and the first target address space and the second target address The space is the same; if the first process needs to share data, the first process transmits a memory allocation request to the operating system, the operating system allocates a memory block, maps the memory block to the first target address space, and maps the information of the memory block to the first target address space The mapping relationship between the first address segment and the memory block is stored in the page table management module. The second process accesses the virtual address in the first address segment, triggers the operating system to generate an access exception, instructs the virtual I / O device to execute an exception handling routine, and maps the memory block to the second process, so that the second process can access the memory piece. This application does not need to pre-allocate shared memory, but only when shared data is needed, the first process triggers the system to allocate memory blocks to improve memory utilization efficiency.

Description

technical field [0001] The present application relates to the technical field of shared memory, and in particular to a method, device and terminal for sharing data between processes. Background technique [0002] Existing operating systems often require multiple processes to complete work in parallel, and each process cannot directly obtain data in other processes. Therefore, shared memory is usually used to implement data sharing among different processes. [0003] In traditional technology, if shared memory is used to share data between different processes, it is necessary to pre-allocate memory accessible by multiple processes, that is, shared memory. When data needs to be shared between different processes, one of the processes will need to share The data stored in the shared memory is stored in the shared memory, and other processes can obtain the data to be shared by accessing the shared memory. Wherein, the method for allocating shared memory usually includes the fol...

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a method, device, and terminal for sharing data between processes, so as to improve to a certain extent the problem of low utilization efficiency of memory resources in the traditional technology when data sharing between different processes is realized through shared memory

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