45fb1be33e
This is in preparation for using RAII in the unit tests. Those tests are built in Chromium as well, but Chromium does not have C++11 library support across all its toolchains. Compiler support is available, so add a partial reimplementation of std::unique_ptr and std::move under crypto/test/. The scopers for the crypto/ library are also moved there while the ones for ssl/ stay in ssl/test/. Change-Id: I38f769acbc16a870db34649928575c7314b6e9f6 Reviewed-on: https://boringssl-review.googlesource.com/4120 Reviewed-by: Adam Langley <agl@google.com>
132 lines
3.1 KiB
C++
132 lines
3.1 KiB
C++
/* Copyright (c) 2015, Google Inc.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
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#ifndef OPENSSL_HEADER_CRYPTO_TEST_STL_COMPAT_H
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#define OPENSSL_HEADER_CRYPTO_TEST_STL_COMPAT_H
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#include <assert.h>
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// This header contains re-implementations of library functions from C++11. They
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// will be replaced with their standard counterparts once Chromium has C++11
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// library support in its toolchain.
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namespace bssl {
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// remove_reference is a reimplementation of |std::remove_reference| from C++11.
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template <class T>
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struct remove_reference {
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using type = T;
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};
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template <class T>
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struct remove_reference<T&> {
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using type = T;
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};
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template <class T>
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struct remove_reference<T&&> {
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using type = T;
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};
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// move is a reimplementation of |std::move| from C++11.
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template <class T>
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typename remove_reference<T>::type &&move(T &&t) {
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return static_cast<typename remove_reference<T>::type&&>(t);
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}
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// default_delete is a partial reimplementation of |std::default_delete| from
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// C++11.
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template <class T>
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struct default_delete {
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void operator()(T *t) const {
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enum { type_must_be_complete = sizeof(T) };
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delete t;
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}
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};
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// nullptr_t is |std::nullptr_t| from C++11.
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using nullptr_t = decltype(nullptr);
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// unique_ptr is a partial reimplementation of |std::unique_ptr| from C++11. It
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// intentionally does not support stateful deleters to avoid having to bother
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// with the empty member optimization.
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template <class T, class Deleter = default_delete<T>>
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class unique_ptr {
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public:
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unique_ptr() : ptr_(nullptr) {}
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unique_ptr(nullptr_t) : ptr_(nullptr) {}
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unique_ptr(T *ptr) : ptr_(ptr) {}
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unique_ptr(const unique_ptr &u) = delete;
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unique_ptr(unique_ptr &&u) : ptr_(nullptr) {
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reset(u.release());
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}
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~unique_ptr() {
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reset();
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}
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unique_ptr &operator=(nullptr_t) {
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reset();
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return *this;
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}
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unique_ptr &operator=(unique_ptr &&u) {
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reset(u.release());
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return *this;
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}
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unique_ptr& operator=(const unique_ptr &u) = delete;
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explicit operator bool() const {
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return ptr_ != nullptr;
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}
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T &operator*() const {
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assert(ptr_ != nullptr);
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return *ptr_;
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}
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T *operator->() const {
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assert(ptr_ != nullptr);
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return ptr_;
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}
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T *get() const {
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return ptr_;
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}
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T *release() {
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T *ptr = ptr_;
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ptr_ = nullptr;
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return ptr;
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}
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void reset(T *ptr = nullptr) {
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if (ptr_ != nullptr) {
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Deleter()(ptr_);
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}
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ptr_ = ptr;
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}
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private:
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T *ptr_;
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};
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} // namespace bssl
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#endif // OPENSSL_HEADER_CRYPTO_TEST_STL_COMPAT_H
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