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57 lines
1.6 KiB
C++
57 lines
1.6 KiB
C++
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// Copyright Oliver Kowalke 2009.
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#include <cstdlib>
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#include <cstring>
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#include <iostream>
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#include <vector>
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#include <boost/assert.hpp>
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#include <boost/context/all.hpp>
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namespace ctx = boost::ctx;
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ctx::fcontext_t fcm, fc1, fc2;
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void f1( intptr_t)
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{
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std::cout << "f1: entered" << std::endl;
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std::cout << "f1: call jump_fcontext( & fc1, & fc2, 0)" << std::endl;
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ctx::jump_fcontext( & fc1, & fc2, 0);
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std::cout << "f1: return" << std::endl;
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ctx::jump_fcontext( & fc1, & fcm, 0);
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}
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void f2( intptr_t)
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{
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std::cout << "f2: entered" << std::endl;
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std::cout << "f2: call jump_fcontext( & fc2, & fc1, 0)" << std::endl;
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ctx::jump_fcontext( & fc2, & fc1, 0);
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BOOST_ASSERT( false && ! "f2: never returns");
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}
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int main( int argc, char * argv[])
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{
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ctx::stack_allocator alloc1, alloc2;
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fc1.fc_stack.base = alloc1.allocate(ctx::minimum_stacksize());
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fc1.fc_stack.limit =
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static_cast< char * >( fc1.fc_stack.base) - ctx::minimum_stacksize();
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ctx::make_fcontext( & fc1, f1);
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fc2.fc_stack.base = alloc2.allocate(ctx::minimum_stacksize());
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fc2.fc_stack.limit =
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static_cast< char * >( fc2.fc_stack.base) - ctx::minimum_stacksize();
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ctx::make_fcontext( & fc2, f2);
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std::cout << "main: call start_fcontext( & fcm, & fc1, 0)" << std::endl;
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ctx::jump_fcontext( & fcm, & fc1, 0);
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std::cout << "main: done" << std::endl;
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return EXIT_SUCCESS;
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}
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