Index: ObjFW.xcodeproj/project.pbxproj
==================================================================
--- ObjFW.xcodeproj/project.pbxproj
+++ ObjFW.xcodeproj/project.pbxproj
@@ -291,10 +291,11 @@
 		4BA85BCB140ECCE800E91D51 /* OFCountedSet_hashtable.m in Sources */ = {isa = PBXBuildFile; fileRef = 4BA85BC5140ECCE800E91D51 /* OFCountedSet_hashtable.m */; };
 		4BA85BCC140ECCE800E91D51 /* OFMutableSet_hashtable.h in Headers */ = {isa = PBXBuildFile; fileRef = 4BA85BC6140ECCE800E91D51 /* OFMutableSet_hashtable.h */; };
 		4BA85BCD140ECCE800E91D51 /* OFMutableSet_hashtable.m in Sources */ = {isa = PBXBuildFile; fileRef = 4BA85BC7140ECCE800E91D51 /* OFMutableSet_hashtable.m */; };
 		4BA85BCE140ECCE800E91D51 /* OFSet_hashtable.h in Headers */ = {isa = PBXBuildFile; fileRef = 4BA85BC8140ECCE800E91D51 /* OFSet_hashtable.h */; };
 		4BA85BCF140ECCE800E91D51 /* OFSet_hashtable.m in Sources */ = {isa = PBXBuildFile; fileRef = 4BA85BC9140ECCE800E91D51 /* OFSet_hashtable.m */; };
+		4BA9CFA415E129D30076DC74 /* autorelease.h in Headers */ = {isa = PBXBuildFile; fileRef = 4BA9CFA315E129D30076DC74 /* autorelease.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		4BAA60C814D09699006F068D /* OFJSONTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 4BAA60C714D09699006F068D /* OFJSONTests.m */; };
 		4BAE7354139C508E00F682ED /* serialization.xml in CopyFiles */ = {isa = PBXBuildFile; fileRef = 4BAE7353139C507F00F682ED /* serialization.xml */; };
 		4BB25E88139C388A00F574EA /* OFObject+Serialization.h in Headers */ = {isa = PBXBuildFile; fileRef = 4BB25E82139C388A00F574EA /* OFObject+Serialization.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		4BB25E89139C388A00F574EA /* OFObject+Serialization.m in Sources */ = {isa = PBXBuildFile; fileRef = 4BB25E83139C388A00F574EA /* OFObject+Serialization.m */; };
 		4BB25E8A139C388A00F574EA /* OFString+Serialization.h in Headers */ = {isa = PBXBuildFile; fileRef = 4BB25E84139C388A00F574EA /* OFString+Serialization.h */; settings = {ATTRIBUTES = (Public, ); }; };
@@ -650,10 +651,11 @@
 		4BA85BC5140ECCE800E91D51 /* OFCountedSet_hashtable.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = OFCountedSet_hashtable.m; path = src/OFCountedSet_hashtable.m; sourceTree = "<group>"; };
 		4BA85BC6140ECCE800E91D51 /* OFMutableSet_hashtable.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = OFMutableSet_hashtable.h; path = src/OFMutableSet_hashtable.h; sourceTree = "<group>"; };
 		4BA85BC7140ECCE800E91D51 /* OFMutableSet_hashtable.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = OFMutableSet_hashtable.m; path = src/OFMutableSet_hashtable.m; sourceTree = "<group>"; };
 		4BA85BC8140ECCE800E91D51 /* OFSet_hashtable.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = OFSet_hashtable.h; path = src/OFSet_hashtable.h; sourceTree = "<group>"; };
 		4BA85BC9140ECCE800E91D51 /* OFSet_hashtable.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = OFSet_hashtable.m; path = src/OFSet_hashtable.m; sourceTree = "<group>"; };
+		4BA9CFA315E129D30076DC74 /* autorelease.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = autorelease.h; path = src/autorelease.h; sourceTree = "<group>"; };
 		4BAA60C714D09699006F068D /* OFJSONTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = OFJSONTests.m; path = tests/OFJSONTests.m; sourceTree = "<group>"; };
 		4BAE7353139C507F00F682ED /* serialization.xml */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.xml; name = serialization.xml; path = tests/serialization.xml; sourceTree = "<group>"; };
 		4BAF5F46123460C900F4E111 /* OFCollection.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = OFCollection.h; path = src/OFCollection.h; sourceTree = "<group>"; };
 		4BAF5F47123460C900F4E111 /* OFStreamObserver.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = OFStreamObserver.h; path = src/OFStreamObserver.h; sourceTree = "<group>"; };
 		4BAF5F48123460C900F4E111 /* OFStreamObserver.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = OFStreamObserver.m; path = src/OFStreamObserver.m; sourceTree = "<group>"; };
@@ -1044,10 +1046,11 @@
 				4B48B95314DC23B100546D39 /* OFXMLProcessingInstructions.m */,
 				4B6AF97310A8D4450003FB0A /* ObjFW.h */,
 				4B6799561099E7C50041064A /* asprintf.h */,
 				4B6AF96C10A8D3E40003FB0A /* asprintf.m */,
 				4BBA36C411406AB700CBA3AC /* atomic.h */,
+				4BA9CFA315E129D30076DC74 /* autorelease.h */,
 				4B3D236D1337FB5800DD29B8 /* base64.h */,
 				4B3D236E1337FB5800DD29B8 /* base64.m */,
 				4B6AF96F10A8D40E0003FB0A /* iso_8859_15.m */,
 				4BE17AD812FD744C002CEB0B /* foundation-compat.m */,
 				4BBA36C511406AB700CBA3AC /* macros.h */,
@@ -1213,10 +1216,11 @@
 				4B3D23E31337FCB000DD29B8 /* OFXMLParser.h in Headers */,
 				4B48B95414DC23B100546D39 /* OFXMLProcessingInstructions.h in Headers */,
 				4B3D23E41337FCB000DD29B8 /* ObjFW.h in Headers */,
 				4B3D23E51337FCB000DD29B8 /* asprintf.h in Headers */,
 				4B3D23E61337FCB000DD29B8 /* atomic.h in Headers */,
+				4BA9CFA415E129D30076DC74 /* autorelease.h in Headers */,
 				4B3D23E71337FCB000DD29B8 /* base64.h in Headers */,
 				4B3D23E81337FCB000DD29B8 /* macros.h in Headers */,
 				4BD98C03133814220048DD5B /* objfw-defs.h in Headers */,
 				4B3D23E91337FCB000DD29B8 /* of_asprintf.h in Headers */,
 				4BA355BD14879BF700442EF4 /* of_strptime.h in Headers */,

Index: src/Makefile
==================================================================
--- src/Makefile
+++ src/Makefile
@@ -60,11 +60,10 @@
        OFXMLElement+Serialization.m	\
        OFXMLElementBuilder.m		\
        OFXMLNode.m			\
        OFXMLParser.m			\
        OFXMLProcessingInstructions.m	\
-       ${AUTORELEASE_M}			\
        base64.m				\
        of_asprintf.m			\
        of_strptime.m			\
        unicode.m
 
@@ -73,17 +72,19 @@
 	    OFJSONRepresentation.h	\
 	    OFSerialization.h		\
 	    OFTLSSocket.h		\
 	    ObjFW.h			\
 	    asprintf.h			\
+	    autorelease.h		\
 	    ${ATOMIC_H}			\
 	    macros.h			\
 	    objfw-defs.h		\
 	    ${THREADING_H}
 
 SRCS += OFArray_adjacent.m		\
 	OFArray_adjacentSubarray.m	\
+	${AUTORELEASE_M}		\
 	OFCountedSet_hashtable.m	\
 	OFDictionary_hashtable.m	\
 	OFMutableArray_adjacent.m	\
 	OFMutableDictionary_hashtable.m	\
 	OFMutableSet_hashtable.m	\