1
2 // Copyright Oliver Kowalke 2009.
3 // Distributed under the Boost Software License, Version 1.0.
4 // (See accompanying file LICENSE_1_0.txt or copy at
5 // http://www.boost.org/LICENSE_1_0.txt)
6
7 #include <cstdlib>
8 #include <cstring>
9 #include <iostream>
10
11 #include <boost/assert.hpp>
12 #include <boost/context/all.hpp>
13
14 #include "simple_stack_allocator.hpp"
15
16 namespace ctx = boost::context;
17
18 typedef ctx::simple_stack_allocator<
19 8 * 1024 * 1024, // 8MB
20 64 * 1024, // 64kB
21 8 * 1024 // 8kB
22 > stack_allocator;
23
24 ctx::fcontext_t fcm = 0;
25 ctx::fcontext_t fc1 = 0;
26 ctx::fcontext_t fc2 = 0;
27
f2(intptr_t)28 void f2( intptr_t)
29 {
30 std::cout << "f2: entered" << std::endl;
31 ctx::jump_fcontext( & fc2, fc1, 0);
32 }
33
f1(intptr_t)34 void f1( intptr_t)
35 {
36 std::cout << "f1: entered" << std::endl;
37
38 stack_allocator alloc;
39 void * sp = alloc.allocate( stack_allocator::default_stacksize());
40 fc2 = ctx::make_fcontext( sp, stack_allocator::default_stacksize(), f2);
41 ctx::jump_fcontext( & fc1, fc2, 0);
42
43 ctx::jump_fcontext( & fc1, fcm, 0);
44 }
45
main(int argc,char * argv[])46 int main( int argc, char * argv[])
47 {
48 stack_allocator alloc;
49 void * sp = alloc.allocate( stack_allocator::default_stacksize());
50 fc1 = ctx::make_fcontext( sp, stack_allocator::default_stacksize(), f1);
51
52 std::cout << "main: call start_fcontext( & fcm, fc1, 0)" << std::endl;
53 ctx::jump_fcontext( & fcm, fc1, 0);
54
55 std::cout << "main: done" << std::endl;
56
57 return EXIT_SUCCESS;
58 }
59