The key difference to the first example is the lines 19 to 21. By invoking the methods coutMutex.lock() and coutMutex.unlock(), you define the exclusive section. This section can only be accessed by at most a single thread. The access to std::cout is synchronized and the mess becomes harmonious.
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Thanks in particular to Jon Hess, Lakshman, Christian Wittenhorst, Sherhy Pyton, Dendi Suhubdy, Sudhakar Belagurusamy, Richard Sargeant, Rusty Fleming, Ralf Abramowitsch, John Nebel, Mipko, and Alicja Kaminska.
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My special thanks to PVS-Studio
I'm happy to give online seminars or face-to-face seminars worldwide. Please call me if you have any questions.
Standard Seminars (English/German)
Here is a compilation of my standard seminars. These seminars are only meant to give you a first orientation.