From 20d28e80a5c861a9d5f449ea911ab75b4f37ad0d Mon Sep 17 00:00:00 2001 From: Jef Date: Tue, 24 Sep 2024 14:54:57 +0200 Subject: Initial community commit --- Src/replicant/nu/LockFreeItem.h | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 Src/replicant/nu/LockFreeItem.h (limited to 'Src/replicant/nu/LockFreeItem.h') diff --git a/Src/replicant/nu/LockFreeItem.h b/Src/replicant/nu/LockFreeItem.h new file mode 100644 index 00000000..09ccafe3 --- /dev/null +++ b/Src/replicant/nu/LockFreeItem.h @@ -0,0 +1,35 @@ +#pragma once +#include "foundation/atomics.h" +#include "lfitem.h" +/* This data structure holds one item, and returns you the old item when you replace it + it's sort of a "stack of 1" */ + +template +class LockFreeItem +{ +public: + typedef value_t *ptr_t; + LockFreeItem() + { + lfitem_init(&item); + } + + value_t *GetItem() + { + return (value_t *)lfitem_get(&item); + } + + // returns the previous value + value_t *SetItem(value_t *new_item) + { + return (value_t *)lfitem_set(&item, new_item); + } + + // if there's already a value, returns what you passed in + value_t *SetItemIfZero(value_t *new_item) + { + return (value_t *)lfitem_set_if_zero(&item, new_item); + } + + lfitem_value_t item; +}; -- cgit