int main() {
int count = 384;
#if defined(BOOST_USE_SEGMENTED_STACKS)
std::cout << "using segmented_stack stacks: allocates " << count << " * 4kB == " << 4 * count << "kB on stack, ";
std::cout << "initial stack size = " << boost::context::segmented_stack::traits_type::default_size() / 1024 << "kB" << std::endl;
std::cout << "application should not fail" << std::endl;
#else
std::cout << "using standard stacks: allocates " << count << " * 4kB == " << 4 * count << "kB on stack, ";
std::cout << "initial stack size = " << boost::context::fixedsize_stack::traits_type::default_size() / 1024 << "kB" << std::endl;
std::cout << "application might fail" << std::endl;
#endif
boost::context::execution_context main_ctx(
boost::context::execution_context::current() );
boost::context::execution_context bar_ctx(
#if defined(BOOST_USE_SEGMENTED_STACKS)
boost::context::segmented_stack(),
#else
boost::context::fixedsize_stack(),
#endif
[& main_ctx, count](){
bar( count);
main_ctx();
});
bar_ctx();
std::cout << "main: done" << std::endl;
return 0;
}
int main() {
try {
std::istringstream is("1+1");
char c;
bool done=false;
std::exception_ptr except;
// create handle to main execution context
auto main_ctx( boost::context::execution_context::current() );
// execute parser in new execution context
boost::context::execution_context parser_ctx(
boost::context::fixedsize_stack(),
[&main_ctx,&is,&c,&done,&except](){
// create parser with callback function
Parser p( is,
[&main_ctx,&c](char ch){
c=ch;
// resume main execution context
main_ctx();
});
try {
// start recursive parsing
p.run();
} catch ( ... ) {
// store other exceptions in exception-pointer
except = std::current_exception();
}
// set termination flag
done=true;
// resume main execution context
main_ctx();
});
// user-code pulls parsed data from parser
// invert control flow
parser_ctx();
if ( except) {
std::rethrow_exception( except);
}
while( ! done) {
printf("Parsed: %c\n",c);
parser_ctx();
if ( except) {
std::rethrow_exception( except);
}
}
std::cout << "main: done" << std::endl;
return EXIT_SUCCESS;
} catch ( std::exception const& e) {
std::cerr << "exception: " << e.what() << std::endl;
}
return EXIT_FAILURE;
}
int main() {
std::istringstream is("1+1");
bool done=false;
char c;
// create handle to main execution context
boost::context::execution_context main_ctx(
boost::context::execution_context::current() );
// executes parser in new execution context
boost::context::execution_context parser_ctx(
boost::context::fixedsize_stack(),
[&main_ctx,&is,&c,&done](){
// create parser with callback function
Parser p( is,
[&main_ctx,&c](char ch){
c=ch;
// resume main execution context
main_ctx.resume();
});
// start recursive parsing
p.run();
done=true;
main_ctx.resume();
});
// user-code pulls parsed data from parser
// invert control flow
parser_ctx.resume();
do {
printf("Parsed: %c\n",c);
parser_ctx.resume();
} while( ! done);
std::cout << "main: done" << std::endl;
return EXIT_SUCCESS;
}
