45 lines
1.8 KiB
C++
45 lines
1.8 KiB
C++
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// fig12_07.cpp
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// Demonstrating set_new_handler.
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#include <array>
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#include <fmt/format.h>
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#include <iostream>
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#include <memory>
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#include <new> // set_new_handler is defined here
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// handle memory allocation failure
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void customNewHandler() {
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std::cerr << "customNewHandler was called\n";
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std::exit(EXIT_FAILURE);
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}
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int main() {
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std::array<std::unique_ptr<double[]>, 1000> items{};
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// specify that customNewHandler should be called on
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// memory allocation failure
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std::set_new_handler(customNewHandler);
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// aim each unique_ptr at a big block of memory
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for (int i{0}; auto & item : items) {
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item = std::make_unique<double[]>(500'000'000);
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std::cout << fmt::format(
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"items[{}] points to 500,000,000 doubles\n", i++);
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}
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}
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/**************************************************************************
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* (C) Copyright 1992-2022 by Deitel & Associates, Inc. and *
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* Pearson Education, Inc. All Rights Reserved. *
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* *
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* DISCLAIMER: The authors and publisher of this book have used their *
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* best efforts in preparing the book. These efforts include the *
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* development, research, and testing of the theories and programs *
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* to determine their effectiveness. The authors and publisher make *
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* no warranty of any kind, expressed or implied, with regard to these *
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* programs or to the documentation contained in these books. The authors *
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* and publisher shall not be liable in any event for incidental or *
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* consequential damages in connection with, or arising out of, the *
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* furnishing, performance, or use of these programs. *
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**************************************************************************/
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