Make redisKeepAlive work on OSX

fmacros.h

@@ -13,4 +13,8 @@
 #define _XOPEN_SOURCE
 #endif
 
+#if __APPLE__ && __MACH__
+#define _OSX
+#endif
+
 #endif

net.c

@@ -122,6 +122,13 @@ int redisKeepAlive(redisContext *c, int interval) {
         return REDIS_ERR;
     }
 
+#ifdef _OSX
+    val = interval;
+    if (setsockopt(fd, IPPROTO_TCP, TCP_KEEPALIVE, &val, sizeof(val)) < 0) {
+        __redisSetError(c,REDIS_ERR_OTHER,strerror(errno));
+        return REDIS_ERR;
+    }
+#else
     val = interval;
     if (setsockopt(fd, IPPROTO_TCP, TCP_KEEPIDLE, &val, sizeof(val)) < 0) {
         __redisSetError(c,REDIS_ERR_OTHER,strerror(errno));
@@ -140,6 +147,7 @@ int redisKeepAlive(redisContext *c, int interval) {
         __redisSetError(c,REDIS_ERR_OTHER,strerror(errno));
         return REDIS_ERR;
     }
+#endif
 
     return REDIS_OK;
 }