Boost C++ Application Development Cookbook - Second Edition

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Usually, exception_ptr is used to pass exceptions between threads. For example:

void run_throw(boost::exception_ptr& ptr) {    try {        // A lot of code goes here.    } catch (...) {        ptr = boost::current_exception();    }}int main () {    boost::exception_ptr ptr;    // Do some work in parallel.    boost::thread t(        &run_throw,        boost::ref(ptr)    );    // Some code goes here.    // ...    t.join();    // Checking for exception.    if (ptr) {        // Exception occurred in thread.        boost::rethrow_exception(ptr);    }}

The boost::exception_ptr class may allocate memory through heap multiple times, uses atomics, and implements some of the operations by re-throwing and catching exceptions. Try not to use it without an actual need.

C++11 has adopted boost::current_exception, ...