From e5d75e933e59469390450b6b27734e1ef7f363ad Mon Sep 17 00:00:00 2001
From: JamesWrigley <james@puiterwijk.org>
Date: Tue, 9 Jul 2024 17:08:38 +0200
Subject: [PATCH] Fix definition of isfreed()

---
 docs/src/_changelog.md |  4 ++++
 docs/src/reference.md  |  1 +
 src/message.jl         | 10 +++++++---
 3 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/docs/src/_changelog.md b/docs/src/_changelog.md
index d125358..2bc9f9d 100644
--- a/docs/src/_changelog.md
+++ b/docs/src/_changelog.md
@@ -13,6 +13,10 @@ Changelog](https://keepachangelog.com).
 - Support for creating [`Message`](@ref)'s from the new `Memory` type in Julia
   1.11 ([#244]).
 
+### Fixed
+- Fixed [`isfreed()`](@ref), which would previously return the wrong values
+  ([#245]).
+
 ## [v1.2.6] - 2024-06-13
 
 ### Added
diff --git a/docs/src/reference.md b/docs/src/reference.md
index daf8aac..099c22a 100644
--- a/docs/src/reference.md
+++ b/docs/src/reference.md
@@ -60,6 +60,7 @@ Message(::String)
 Message(::SubString{String})
 Message(::Array)
 Message(::IOBuffer)
+isfreed(::Message)
 ```
 
 ## Context
diff --git a/src/message.jl b/src/message.jl
index f1849c0..4d8d05a 100644
--- a/src/message.jl
+++ b/src/message.jl
@@ -129,9 +129,13 @@ mutable struct Message <: AbstractArray{UInt8,1}
     end
 end
 
-# check whether zeromq has called our free-function, i.e. whether
-# we are save to reclaim ownership of any buffer object
-isfreed(m::Message) = haskey(gc_protect, getfield(m, :handle))
+"""
+    isfreed(m::Message)
+
+Check whether zeromq has called our free-function, i.e. whether we are safe to
+reclaim ownership of any buffer object the [`Message`](@ref) was created with.
+"""
+isfreed(m::Message) = !haskey(gc_protect, getfield(m, :handle))
 
 # AbstractArray behaviors:
 Base.similar(a::Message, ::Type{T}, dims::Dims) where {T} = Array{T}(undef, dims) # ?