Adding upstream version 18.2.2.upstream/18.2.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 51 insertions, 0 deletions

diff --git a/src/boost/libs/context/example/callcc/segmented.cpp b/src/boost/libs/context/example/callcc/segmented.cpp
new file mode 100644
index 000000000..c70de99c3
--- /dev/null
+++ b/src/boost/libs/context/example/callcc/segmented.cpp
@@ -0,0 +1,51 @@
+
+//          Copyright Oliver Kowalke 2014.
+// 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 <cstdlib>
+#include <iostream>
+#include <memory>
+
+#include <boost/context/continuation.hpp>
+
+namespace ctx = boost::context;
+
+#ifdef BOOST_MSVC //MS VisualStudio
+__declspec(noinline) void access( char *buf);
+#else // GCC
+void access( char *buf) __attribute__ ((noinline));
+#endif
+void access( char *buf) {
+  buf[0] = '\0';
+}
+
+void bar( int i) {
+    char buf[4 * 1024];
+    if ( i > 0) {
+        access( buf);
+        std::cout << i << ". iteration" << std::endl;
+        bar( i - 1);
+    }
+}
+
+int main() {
+    int count = 100*1024;
+#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 = " << ctx::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 = " << ctx::fixedsize_stack::traits_type::default_size() / 1024 << "kB" << std::endl;
+    std::cout << "application might fail" << std::endl;
+#endif
+    ctx::continuation c = ctx::callcc(
+        [count](ctx::continuation && c){
+            bar( count);
+            return std::move( c);
+        });
+    std::cout << "main: done" << std::endl;
+    return EXIT_SUCCESS;
+}