diff options
Diffstat (limited to 'test/std/utilities/memory/ptr.align/align.pass.cpp')
-rw-r--r-- | test/std/utilities/memory/ptr.align/align.pass.cpp | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/test/std/utilities/memory/ptr.align/align.pass.cpp b/test/std/utilities/memory/ptr.align/align.pass.cpp new file mode 100644 index 000000000000..d77d13c906de --- /dev/null +++ b/test/std/utilities/memory/ptr.align/align.pass.cpp @@ -0,0 +1,84 @@ +//===----------------------------------------------------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is dual licensed under the MIT and the University of Illinois Open +// Source Licenses. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +// #include <memory> + +// void* align(size_t alignment, size_t size, void*& ptr, size_t& space); + +#include <memory> +#include <cassert> + +int main() +{ + const unsigned N = 20; + char buf[N]; + void* r; + void* p = &buf[0]; + std::size_t s = N; + r = std::align(4, 10, p, s); + assert(p == &buf[0]); + assert(r == p); + assert(s == N); + + p = &buf[1]; + s = N; + r = std::align(4, 10, p, s); + assert(p == &buf[4]); + assert(r == p); + assert(s == N-3); + + p = &buf[2]; + s = N; + r = std::align(4, 10, p, s); + assert(p == &buf[4]); + assert(r == p); + assert(s == N-2); + + p = &buf[3]; + s = N; + r = std::align(4, 10, p, s); + assert(p == &buf[4]); + assert(r == p); + assert(s == N-1); + + p = &buf[4]; + s = N; + r = std::align(4, 10, p, s); + assert(p == &buf[4]); + assert(r == p); + assert(s == N); + + p = &buf[0]; + s = N; + r = std::align(4, N, p, s); + assert(p == &buf[0]); + assert(r == p); + assert(s == N); + + p = &buf[1]; + s = N-1; + r = std::align(4, N-4, p, s); + assert(p == &buf[4]); + assert(r == p); + assert(s == N-4); + + p = &buf[1]; + s = N-1; + r = std::align(4, N-3, p, s); + assert(p == &buf[1]); + assert(r == nullptr); + assert(s == N-1); + + p = &buf[0]; + s = N; + r = std::align(1, N+1, p, s); + assert(p == &buf[0]); + assert(r == nullptr); + assert(s == N); +} |