use unsafe_convert instead of cconvert to ensure handles aren't GCed …

…during ccall (#482)
JuliaParallel · Jul 13, 2021 · b623eb5 · b623eb5
1 parent 68545ed
commit b623eb5
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/src/handle.jl b/src/handle.jl
@@ -32,6 +32,9 @@ macro mpi_handle(def, mpiname=nothing, extrafields...)
 
         # allows us to pass XX objects directly into MPI_XX ccall signatures
         function Base.cconvert(::Type{$mpiname}, obj::$name)
+            obj
+        end
+        function Base.unsafe_convert(::Type{$mpiname}, obj::$name)
             obj.val
         end
         # allows us to pass XX objects directly into Ptr{MPI_XX} ccall signatures