1 files changed, 16 insertions, 0 deletions

diff --git a/memstack/include/memstack.h b/memstack/include/memstack.h
index 9a8a7ee..93cd2e6 100644
--- a/memstack/include/memstack.h
+++ b/memstack/include/memstack.h
@@ -32,14 +32,30 @@ void memstack_del(memstack*);
 /// Clear the stack.
 void memstack_clear(memstack*);
 
+/// Return the top of the stack.
+size_t memstack_watermark(const memstack*);
+
+/// Set the top of the stack.
+void memstack_set_watermark(memstack*, size_t watermark);
+
 /// Allocate a new block.
+///
 /// Return null if the block does not fit in the remaining memory.
+///
 /// When there is no space left in the stack, allocation can either trap
 /// (default) or gracefully return null. Call mem_enable_traps() to toggle this
 /// behaviour.
+///
 /// Newly allocated blocks are conveniently zeroed out.
 void* memstack_alloc(memstack*, size_t bytes);
 
+/// Allocate a new aligned block.
+///
+/// An alignment of 0 is allowed for convenience and has the same effect as 1.
+///
+/// Has the same properties as memstack_alloc().
+void* memstack_alloc_aligned(memstack*, size_t bytes, size_t alignment);
+
 /// Return the stack's used size in bytes.
 size_t memstack_size(const memstack*);