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util/Intrusive*: move constant_time_size to an options struct

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This makes it easier to add more options later.
This commit is contained in:
Max Kellermann
2023-09-11 18:48:21 +02:00
committed by Max Kellermann
parent 1f495efb46
commit f01793ad4a
8 changed files with 44 additions and 31 deletions
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10
src/util/IntrusiveForwardList.hxx
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@@ -14,6 +14,10 @@
#include <type_traits>
#include <utility>
struct IntrusiveForwardListOptions {
bool constant_time_size = false;
};
struct IntrusiveForwardListNode {
IntrusiveForwardListNode *next;
};
@@ -93,8 +97,10 @@ struct IntrusiveForwardListMemberHookTraits {
*/
template<typename T,
typename HookTraits=IntrusiveForwardListBaseHookTraits<T>,
bool constant_time_size=false>
IntrusiveForwardListOptions options=IntrusiveForwardListOptions{}>
class IntrusiveForwardList {
static constexpr bool constant_time_size = options.constant_time_size;
IntrusiveForwardListNode head{nullptr};
[[no_unique_address]]
@@ -145,7 +151,7 @@ public:
:head(src.head)
{
// shallow copies mess with the counter
static_assert(!constant_time_size);
static_assert(!options.constant_time_size);
}
IntrusiveForwardList &operator=(IntrusiveForwardList &&src) noexcept {