From ec90f1dc11488f0ab8a25a9159965b4ae3c4ca88 Mon Sep 17 00:00:00 2001
From: Kenny Root <kroot@google.com>
Date: Sat, 13 Oct 2012 11:59:01 -0700
Subject: [PATCH] Add TEMP_FAILURE_RETRY macro for darwin

Darwin doesn't define the TEMP_FAILURE_RETRY macro in unistd.h so we
need to add it everywhere. Joy!

Change-Id: Ida554fc65193672cc4616dec79e6282e06cc1b28
---
 adb/sysdeps.h | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/adb/sysdeps.h b/adb/sysdeps.h
index ee7cd495e..0252ef3b8 100644
--- a/adb/sysdeps.h
+++ b/adb/sysdeps.h
@@ -277,6 +277,21 @@ extern char*  adb_strtok_r(char *str, const char *delim, char **saveptr);
 #include <string.h>
 #include <unistd.h>
 
+/*
+ * TEMP_FAILURE_RETRY is defined by some, but not all, versions of
+ * <unistd.h>. (Alas, it is not as standard as we'd hoped!) So, if it's
+ * not already defined, then define it here.
+ */
+#ifndef TEMP_FAILURE_RETRY
+/* Used to retry syscalls that can return EINTR. */
+#define TEMP_FAILURE_RETRY(exp) ({         \
+    typeof (exp) _rc;                      \
+    do {                                   \
+        _rc = (exp);                       \
+    } while (_rc == -1 && errno == EINTR); \
+    _rc; })
+#endif
+
 #define OS_PATH_SEPARATOR '/'
 #define OS_PATH_SEPARATOR_STR "/"
 #define ENV_PATH_SEPARATOR_STR ":"