Using the __cleanup__ variable attribute in GCC

by Amit


GCC’s C compiler allows you to define various variable attributes. One of them is the cleanup attribute (which you can also write as__cleanup__) which allows you to define a function to be called when the variable goes out of scope (for example, before returning from a function). This is useful, for example to never forget to close a file or freeing the memory you may have allocated. Next up is a demo example defining this attribute on an integer variable (which obviously has no practical value). I am using gcc (GCC) 4.7.2 20121109 on Fedora 18.

Read the article here.

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