mirror of
https://github.com/boostorg/fiber.git
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93 lines
2.3 KiB
C++
93 lines
2.3 KiB
C++
#include <cstdlib>
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#include <functional>
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#include <iostream>
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#include <stdexcept>
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#include <boost/assert.hpp>
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#include <boost/fiber/all.hpp>
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int value1 = 0;
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int value2 = 0;
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inline
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void fn1( boost::fibers::barrier & b)
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{
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boost::fibers::fiber::id id = boost::this_fiber::get_id();
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std::cout << "fiber " << id << ": fn1 entered" << std::endl;
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++value1;
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std::cout << "fiber " << id << ": incremented value1: " << value1 << std::endl;
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boost::this_fiber::yield();
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std::cout << "fiber " << id << ": waits for barrier" << std::endl;
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b.wait();
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std::cout << "fiber " << id << ": passed barrier" << std::endl;
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++value1;
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std::cout << "fiber " << id << ": incremented value1: " << value1 << std::endl;
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boost::this_fiber::yield();
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++value1;
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std::cout << "fiber " << id << ": incremented value1: " << value1 << std::endl;
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boost::this_fiber::yield();
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++value1;
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std::cout << "fiber " << id << ": incremented value1: " << value1 << std::endl;
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boost::this_fiber::yield();
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std::cout << "fiber " << id << ": fn1 returns" << std::endl;
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}
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inline
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void fn2( boost::fibers::barrier & b)
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{
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boost::fibers::fiber::id id = boost::this_fiber::get_id();
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std::cout << "fiber " << id << ": fn2 entered" << std::endl;
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++value2;
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std::cout << "fiber " << id << ": incremented value2: " << value2 << std::endl;
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boost::this_fiber::yield();
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++value2;
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std::cout << "fiber " << id << ": incremented value2: " << value2 << std::endl;
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boost::this_fiber::yield();
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++value2;
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std::cout << "fiber " << id << ": incremented value2: " << value2 << std::endl;
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boost::this_fiber::yield();
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std::cout << "fiber " << id << ": waits for barrier" << std::endl;
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b.wait();
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std::cout << "fiber " << id << ": passed barrier" << std::endl;
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++value2;
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std::cout << "fiber " << id << ": incremented value2: " << value2 << std::endl;
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boost::this_fiber::yield();
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std::cout << "fiber " << id << ": fn2 returns" << std::endl;
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}
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int main()
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{
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try
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{
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boost::fibers::barrier fb( 2);
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boost::fibers::fiber f1( & fn1, std::ref( fb) );
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boost::fibers::fiber f2( & fn2, std::ref( fb) );
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f1.join();
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f2.join();
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std::cout << "done." << std::endl;
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return EXIT_SUCCESS;
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}
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catch ( std::exception const& e)
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{ std::cerr << "exception: " << e.what() << std::endl; }
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catch (...)
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{ std::cerr << "unhandled exception" << std::endl; }
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return EXIT_FAILURE;
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}
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