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854c49d321
- make_fcontext() allocated fcontext_t on context stack and return pointer - stack_allocator renamed to guarded_stack_allocator - simple_stack_allocator using calloc()/free() added - pagesize() made public accessible [SVN r80423]
63 lines
2.0 KiB
C++
63 lines
2.0 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;
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ctx::fcontext_t * fc1 = 0;
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ctx::fcontext_t * fc2 = 0;
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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::guarded_stack_allocator alloc;
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void * base1 = alloc.allocate(ctx::guarded_stack_allocator::default_stacksize());
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BOOST_ASSERT( base1);
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fc1 = ctx::make_fcontext( base1, ctx::guarded_stack_allocator::default_stacksize(), f1);
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BOOST_ASSERT( fc1);
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BOOST_ASSERT( base1 == fc1->fc_stack.sp);
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BOOST_ASSERT( ctx::guarded_stack_allocator::default_stacksize() == fc1->fc_stack.size);
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void * base2 = alloc.allocate(ctx::guarded_stack_allocator::default_stacksize());
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BOOST_ASSERT( base2);
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fc2 = ctx::make_fcontext( base2, ctx::guarded_stack_allocator::default_stacksize(), f2);
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BOOST_ASSERT( fc2);
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BOOST_ASSERT( base2 == fc2->fc_stack.sp);
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BOOST_ASSERT( ctx::guarded_stack_allocator::default_stacksize() == fc2->fc_stack.size);
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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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