diff options
Diffstat (limited to 'absl/container/internal')
| -rw-r--r-- | absl/container/internal/inlined_vector.h | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/absl/container/internal/inlined_vector.h b/absl/container/internal/inlined_vector.h index 6a5a75be1f20..4589ce0837a4 100644 --- a/absl/container/internal/inlined_vector.h +++ b/absl/container/internal/inlined_vector.h @@ -16,6 +16,7 @@ #define ABSL_CONTAINER_INTERNAL_INLINED_VECTOR_INTERNAL_H_ #include <cstddef> +#include <cstring> #include <iterator> #include <memory> #include <utility> @@ -31,6 +32,33 @@ using IsAtLeastForwardIterator = std::is_convertible< typename std::iterator_traits<Iterator>::iterator_category, std::forward_iterator_tag>; +template <typename AllocatorType, typename ValueType, typename SizeType> +void DestroyElements(AllocatorType alloc, ValueType* destroy_first, + SizeType destroy_size) { + using AllocatorTraits = std::allocator_traits<AllocatorType>; + + // Destroys `destroy_size` elements from `destroy_first`. + // + // Destroys the range + // [`destroy_first`, `destroy_first + destroy_size`). + // + // NOTE: We assume destructors do not throw and thus make no attempt to roll + // back. + for (SizeType i = 0; i < destroy_size; ++i) { + AllocatorTraits::destroy(alloc, destroy_first + i); + } + +#ifndef NDEBUG + // Overwrite unused memory with `0xab` so we can catch uninitialized usage. + // + // Cast to `void*` to tell the compiler that we don't care that we might be + // scribbling on a vtable pointer. + void* memory = reinterpret_cast<void*>(destroy_first); + size_t memory_size = sizeof(ValueType) * destroy_size; + std::memset(memory, 0xab, memory_size); +#endif // NDEBUG +} + template <typename T, size_t N, typename A> class Storage { public: |