# HG changeset patch
# User Tuomo Valkonen <tuomov@iki.fi>
# Date 1577524361 -7200
# Node ID e9edf00242a344ba5cbe3cba168e0a07b77a172b
# Parent  59d94d475b5a6e2dd545b3812e2a9bc313fe8da2
@backgroundif

diff -r 59d94d475b5a -r e9edf00242a3 src/Util.jl
--- a/src/Util.jl	Sat Dec 28 10:14:02 2019 +0200
+++ b/src/Util.jl	Sat Dec 28 11:12:41 2019 +0200
@@ -25,7 +25,8 @@
        curry,
        ⬿,
        @threadsif,
-       @background
+       @background,
+       @backgroundif
 
 
 ##########
@@ -35,9 +36,9 @@
 macro threadsif(threads, loop)
     return esc(:(if $threads
                     Threads.@threads $loop
-                 else
+                else
                     $loop
-                 end))
+                end))
 end
 
 macro background(bgtask, fgtask)
@@ -46,6 +47,15 @@
              wait(t))
 end
 
+macro backgroundif(threads, bgtask, fgtask)
+    return :(if $(esc(threads))
+                @background $(esc(bgtask)) $(esc(fgtask))
+            else
+                $(esc(bgtask))
+                $(esc(fgtask))
+            end)
+end
+
 ########################
 # Functional programming
 #########################