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// Copyright Oliver Kowalke 2009.
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#include <stdio.h>
#include <stdlib.h>
#include <cmath>
#include <cstdint>
#include <iostream>
#include <sstream>
#include <stdexcept>
#include <string>
#include <utility>
#include <boost/array.hpp>
#include <boost/assert.hpp>
#include <boost/test/unit_test.hpp>
#include <boost/utility.hpp>
#include <boost/context/detail/config.hpp>
#include <boost/context/detail/fcontext.hpp>
template< std::size_t Max, std::size_t Default, std::size_t Min >
class simple_stack_allocator
{
public:
static std::size_t maximum_stacksize()
{ return Max; }
static std::size_t default_stacksize()
{ return Default; }
static std::size_t minimum_stacksize()
{ return Min; }
void * allocate( std::size_t size) const
{
BOOST_ASSERT( minimum_stacksize() <= size);
BOOST_ASSERT( maximum_stacksize() >= size);
void * limit = malloc( size);
if ( ! limit) throw std::bad_alloc();
return static_cast< char * >( limit) + size;
}
void deallocate( void * vp, std::size_t size) const
{
BOOST_ASSERT( vp);
BOOST_ASSERT( minimum_stacksize() <= size);
BOOST_ASSERT( maximum_stacksize() >= size);
void * limit = static_cast< char * >( vp) - size;
free( limit);
}
};
typedef simple_stack_allocator<
8 * 1024 * 1024, 64 * 1024, 8 * 1024
> stack_allocator;
namespace ctx = boost::context::detail;
typedef simple_stack_allocator<
8 * 1024 * 1024, // 8MB
64 * 1024, // 64kB
8 * 1024 // 8kB
> stack_allocator;
int value1 = 0;
std::string value2;
double value3 = 0.;
void * value4 = 0;
void f1( ctx::transfer_t t) {
++value1;
ctx::jump_fcontext( t.fctx, t.data);
}
void f3( ctx::transfer_t t_) {
++value1;
ctx::transfer_t t = ctx::jump_fcontext( t_.fctx, 0);
++value1;
ctx::jump_fcontext( t.fctx, t.data);
}
void f4( ctx::transfer_t t) {
int i = 7;
ctx::jump_fcontext( t.fctx, & i);
}
void f5( ctx::transfer_t t) {
ctx::jump_fcontext( t.fctx, t.data);
}
void f6( ctx::transfer_t t_) {
std::pair< int, int > data = * ( std::pair< int, int > * ) t_.data;
int res = data.first + data.second;
ctx::transfer_t t = ctx::jump_fcontext( t_.fctx, & res);
data = * ( std::pair< int, int > *) t.data;
res = data.first + data.second;
ctx::jump_fcontext( t.fctx, & res);
}
void f7( ctx::transfer_t t) {
try {
throw std::runtime_error( * ( std::string *) t.data);
} catch ( std::runtime_error const& e) {
value2 = e.what();
}
ctx::jump_fcontext( t.fctx, t.data);
}
void f8( ctx::transfer_t t) {
double d = * ( double *) t.data;
d += 3.45;
value3 = d;
ctx::jump_fcontext( t.fctx, 0);
}
void f10( ctx::transfer_t t) {
value1 = 3;
ctx::jump_fcontext( t.fctx, 0);
}
void f9( ctx::transfer_t t) {
std::cout << "f1: entered" << std::endl;
stack_allocator alloc;
void * sp = alloc.allocate( stack_allocator::default_stacksize());
ctx::fcontext_t ctx = ctx::make_fcontext( sp, stack_allocator::default_stacksize(), f10);
ctx::jump_fcontext( ctx, 0);
ctx::jump_fcontext( t.fctx, 0);
}
ctx::transfer_t f11( ctx::transfer_t t_) {
value4 = t_.data;
ctx::transfer_t t = { t_.fctx, t_.data };
return t;
}
void f12( ctx::transfer_t t_) {
ctx::transfer_t t = ctx::jump_fcontext( t_.fctx, t_.data);
value1 = * ( int *) t.data;
ctx::jump_fcontext( t.fctx, t.data);
}
void f13( ctx::transfer_t t) {
{
double n1 = 0;
double n2 = 0;
sscanf("3.14 7.13", "%lf %lf", & n1, & n2);
BOOST_CHECK( n1 == 3.14);
BOOST_CHECK( n2 == 7.13);
}
{
int n1=0;
int n2=0;
sscanf("1 23", "%d %d", & n1, & n2);
BOOST_CHECK( n1 == 1);
BOOST_CHECK( n2 == 23);
}
{
int n1=0;
int n2=0;
sscanf("1 jjj 23", "%d %*[j] %d", & n1, & n2);
BOOST_CHECK( n1 == 1);
BOOST_CHECK( n2 == 23);
}
ctx::jump_fcontext( t.fctx, 0);
}
void f14( ctx::transfer_t t) {
{
const char *fmt = "sqrt(2) = %f";
char buf[19];
snprintf( buf, sizeof( buf), fmt, std::sqrt( 2) );
BOOST_CHECK( 0 < sizeof( buf) );
BOOST_CHECK_EQUAL( std::string("sqrt(2) = 1.41"), std::string( buf, 14) );
}
{
std::uint64_t n = 0xbcdef1234567890;
const char *fmt = "0x%016llX";
char buf[100];
snprintf( buf, sizeof( buf), fmt, n);
BOOST_CHECK_EQUAL( std::string("0x0BCDEF1234567890"), std::string( buf, 18) );
}
ctx::jump_fcontext( t.fctx, 0);
}
void test_setup() {
stack_allocator alloc;
void * sp = alloc.allocate( stack_allocator::default_stacksize() );
ctx::fcontext_t ctx = ctx::make_fcontext( sp, stack_allocator::default_stacksize(), f1);
BOOST_CHECK( ctx);
alloc.deallocate( sp, stack_allocator::default_stacksize() );
}
void test_start() {
value1 = 0;
stack_allocator alloc;
void * sp = alloc.allocate( stack_allocator::default_stacksize() );
ctx::fcontext_t ctx = ctx::make_fcontext( sp, stack_allocator::default_stacksize(), f1);
BOOST_CHECK( ctx);
BOOST_CHECK_EQUAL( 0, value1);
ctx::jump_fcontext( ctx, 0);
BOOST_CHECK_EQUAL( 1, value1);
alloc.deallocate( sp, stack_allocator::default_stacksize() );
}
void test_jump() {
value1 = 0;
stack_allocator alloc;
void * sp = alloc.allocate( stack_allocator::default_stacksize() );
ctx::fcontext_t ctx = ctx::make_fcontext( sp, stack_allocator::default_stacksize(), f3);
BOOST_CHECK( ctx);
BOOST_CHECK_EQUAL( 0, value1);
ctx::transfer_t t = ctx::jump_fcontext( ctx, 0);
BOOST_CHECK_EQUAL( 1, value1);
ctx::jump_fcontext( t.fctx, 0);
BOOST_CHECK_EQUAL( 2, value1);
alloc.deallocate( sp, stack_allocator::default_stacksize() );
}
void test_result() {
stack_allocator alloc;
void * sp = alloc.allocate( stack_allocator::default_stacksize() );
ctx::fcontext_t ctx = ctx::make_fcontext( sp, stack_allocator::default_stacksize(), f4);
BOOST_CHECK( ctx);
ctx::transfer_t t = ctx::jump_fcontext( ctx, 0);
int result = * ( int *) t.data;
BOOST_CHECK_EQUAL( 7, result);
alloc.deallocate( sp, stack_allocator::default_stacksize() );
}
void test_arg() {
stack_allocator alloc;
int i = 7;
void * sp = alloc.allocate( stack_allocator::default_stacksize() );
ctx::fcontext_t ctx = ctx::make_fcontext( sp, stack_allocator::default_stacksize(), f5);
BOOST_CHECK( ctx);
ctx::transfer_t t = ctx::jump_fcontext( ctx, & i);
int result = * ( int *) t.data;
BOOST_CHECK_EQUAL( i, result);
alloc.deallocate( sp, stack_allocator::default_stacksize() );
}
void test_transfer() {
stack_allocator alloc;
std::pair< int, int > data = std::make_pair( 3, 7);
void * sp = alloc.allocate( stack_allocator::default_stacksize() );
ctx::fcontext_t ctx = ctx::make_fcontext( sp, stack_allocator::default_stacksize(), f6);
BOOST_CHECK( ctx);
ctx::transfer_t t = ctx::jump_fcontext( ctx, & data);
int result = * ( int *) t.data;
BOOST_CHECK_EQUAL( 10, result);
data = std::make_pair( 7, 7);
t = ctx::jump_fcontext( t.fctx, & data);
result = * ( int *) t.data;
BOOST_CHECK_EQUAL( 14, result);
alloc.deallocate( sp, stack_allocator::default_stacksize() );
}
void test_exception() {
stack_allocator alloc;
std::string what("hello world");
void * sp = alloc.allocate( stack_allocator::default_stacksize() );
ctx::fcontext_t ctx = ctx::make_fcontext( sp, stack_allocator::default_stacksize(), f7);
BOOST_CHECK( ctx);
ctx::jump_fcontext( ctx, & what);
BOOST_CHECK_EQUAL( std::string( what), value2);
alloc.deallocate( sp, stack_allocator::default_stacksize() );
}
void test_fp() {
stack_allocator alloc;
double d = 7.13;
void * sp = alloc.allocate( stack_allocator::default_stacksize() );
ctx::fcontext_t ctx = ctx::make_fcontext( sp, stack_allocator::default_stacksize(), f8);
BOOST_CHECK( ctx);
ctx::jump_fcontext( ctx, & d);
BOOST_CHECK_EQUAL( 10.58, value3);
alloc.deallocate( sp, stack_allocator::default_stacksize() );
}
void test_stacked() {
value1 = 0;
stack_allocator alloc;
void * sp = alloc.allocate( stack_allocator::default_stacksize());
ctx::fcontext_t ctx = ctx::make_fcontext( sp, stack_allocator::default_stacksize(), f9);
ctx::jump_fcontext( ctx, 0);
BOOST_CHECK_EQUAL( 3, value1);
alloc.deallocate( sp, stack_allocator::default_stacksize() );
}
void test_ontop() {
value1 = 0;
value4 = 0;
stack_allocator alloc;
void * sp = alloc.allocate( stack_allocator::default_stacksize() );
ctx::fcontext_t ctx = ctx::make_fcontext( sp, stack_allocator::default_stacksize(), f12);
BOOST_CHECK( ctx);
ctx::transfer_t t = ctx::jump_fcontext( ctx, 0);
BOOST_CHECK_EQUAL( 0, value1);
BOOST_CHECK( 0 == value4);
int i = -3;
t = ctx::ontop_fcontext( t.fctx, & i, f11);
BOOST_CHECK_EQUAL( -3, value1);
BOOST_CHECK_EQUAL( & i, value4);
BOOST_CHECK_EQUAL( -3, * ( int *) t.data);
BOOST_CHECK_EQUAL( & i, ( int *) t.data);
alloc.deallocate( sp, stack_allocator::default_stacksize() );
}
void test_sscanf() {
stack_allocator alloc;
void * sp = alloc.allocate( stack_allocator::default_stacksize() );
ctx::fcontext_t ctx = ctx::make_fcontext( sp, stack_allocator::default_stacksize(), f13);
BOOST_CHECK( ctx);
ctx::jump_fcontext( ctx, 0);
alloc.deallocate( sp, stack_allocator::default_stacksize() );
}
void test_snprintf() {
stack_allocator alloc;
void * sp = alloc.allocate( stack_allocator::default_stacksize() );
ctx::fcontext_t ctx = ctx::make_fcontext( sp, stack_allocator::default_stacksize(), f14);
ctx::jump_fcontext( ctx, 0);
alloc.deallocate( sp, stack_allocator::default_stacksize() );
}
boost::unit_test::test_suite * init_unit_test_suite( int, char* []) {
boost::unit_test::test_suite * test =
BOOST_TEST_SUITE("Boost.Context: fcontext test suite");
test->add( BOOST_TEST_CASE( & test_setup) );
test->add( BOOST_TEST_CASE( & test_start) );
test->add( BOOST_TEST_CASE( & test_jump) );
test->add( BOOST_TEST_CASE( & test_result) );
test->add( BOOST_TEST_CASE( & test_arg) );
test->add( BOOST_TEST_CASE( & test_transfer) );
test->add( BOOST_TEST_CASE( & test_exception) );
test->add( BOOST_TEST_CASE( & test_fp) );
test->add( BOOST_TEST_CASE( & test_stacked) );
test->add( BOOST_TEST_CASE( & test_ontop) );
test->add( BOOST_TEST_CASE( & test_sscanf) );
test->add( BOOST_TEST_CASE( & test_snprintf) );
return test;
}
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