Skrevet av Emne: C++ unique_ptr wrapper for strdup()  (Lest 3878 ganger)

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C++ unique_ptr wrapper for strdup()
« på: 29. ſeptember 2020, 11:48 am »
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  • How to wrap a char* from strdup() in a smart pointer to guarantee it gets freed?

    Kode: [Velg]
    #include <memory>
    typedef std::unique_ptr<char, decltype(&std::free)> char_ptr;

    char_ptr make_char_ptr(const std::string str)
    {
      return char_ptr(strdup(str.data()), std::free);
    }

    //...

    char_ptr foo = make_char_ptr("bar");
    foo.get(); // char* pointer to a copy of "bar"

    // pointer automatically gets freed when 'foo' goes out of scope
    // or can be freed manually with
    foo.reset();


    -Floyd.

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    Utlogget Beauvais

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    The best thing about comics
    « Svar #1 på: 07. November 2020, 14:35 pm »
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  • The best thing about comics is that a comic creator can control when and where the reader sees exciting things in the comic. These exciting moments in the comic are generally placed after the turn of a page To Know More.