tree-wide: make macros for converting fds to pointers and back generic and use them everywhere

src/basic/async.c

@@ -68,7 +68,7 @@ int asynchronous_sync(void) {
 }
 
 static void *close_thread(void *p) {
-        assert_se(close_nointr(PTR_TO_INT(p)) != -EBADF);
+        assert_se(close_nointr(PTR_TO_FD(p)) != -EBADF);
         return NULL;
 }
 
@@ -84,7 +84,7 @@ int asynchronous_close(int fd) {
         if (fd >= 0) {
                 PROTECT_ERRNO;
 
-                r = asynchronous_job(close_thread, INT_TO_PTR(fd));
+                r = asynchronous_job(close_thread, FD_TO_PTR(fd));
                 if (r < 0)
                          assert_se(close_nointr(fd) != -EBADF);
         }

src/basic/fd-util.h

@@ -28,6 +28,10 @@
 
 #include "macro.h"
 
+/* Make sure we can distinguish fd 0 and NULL */
+#define FD_TO_PTR(fd) INT_TO_PTR((fd)+1)
+#define PTR_TO_FD(p) (PTR_TO_INT(p)-1)
+
 int close_nointr(int fd);
 int safe_close(int fd);
 void safe_close_pair(int p[]);

src/basic/fdset.c

@@ -36,10 +36,6 @@
 #define MAKE_SET(s) ((Set*) s)
 #define MAKE_FDSET(s) ((FDSet*) s)
 
-/* Make sure we can distinguish fd 0 and NULL */
-#define FD_TO_PTR(fd) INT_TO_PTR((fd)+1)
-#define PTR_TO_FD(p) (PTR_TO_INT(p)-1)
-
 FDSet *fdset_new(void) {
         return MAKE_FDSET(set_new(NULL));
 }