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Editorial Team
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Asked: 2026-05-16T02:38:17+00:00

I have a unique problem. There are two processes (P0 and P1) trying to

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I have a unique problem. There are two processes (P0 and P1) trying to access one file. P0 is writing information to the file and P1 is reading the information. There is a race condition occurring between the two in which P1 is reading before P0 is finished writing. I have considered using Locks, Semaphores, etc. However, P1 exists in a set of code that I am not allowed to alter in any way, and it currently has no implementation to support the above proposed fixes.

Is there any way to remove this race condition without touching both sets of code?

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1 Answer

  1. Editorial Team

    You can let P0 write to file A and let P1 read from file B. When P0 has completed writing the file, rename file A to file B. You’ll have to make sure the rename operation is atomic though.

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