Make most implicit integer truncations and sign conversions explicit

[folly.git] / folly / detail / SocketFastOpen.h

diff --git a/folly/detail/SocketFastOpen.h b/folly/detail/SocketFastOpen.h
index 1295a1e640967311400d06916b4cbe7a0a3e85b5..732dc4bd9fa28579679c2d2c1076f4154783bbee 100644 (file)
--- a/folly/detail/SocketFastOpen.h
+++ b/folly/detail/SocketFastOpen.h
@@ -1,5 +1,5 @@
 /*
- * Copyright 2016 Facebook, Inc.
+ * Copyright 2017 Facebook, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -19,31 +19,30 @@
 #include <folly/portability/Sockets.h>
 #include <sys/types.h>
 
-#if !defined(FOLLY_ALLOW_TFO) && defined(TCP_FASTOPEN) && defined(MSG_FASTOPEN)
+#if !defined(FOLLY_ALLOW_TFO)
+#if defined(__linux__) || defined(__APPLE__)
+// only allow for linux right now
 #define FOLLY_ALLOW_TFO 1
 #endif
+#endif
 
 namespace folly {
 namespace detail {
 
-#if FOLLY_ALLOW_TFO
-
 /**
- * tfo_sendto has the same semantics as sendto, but is used to
+ * tfo_sendto has the same semantics as sendmsg, but is used to
  * send with TFO data.
  */
-ssize_t tfo_sendto(
-    int sockfd,
-    const void* buf,
-    size_t len,
-    int flags,
-    const struct sockaddr* dest_addr,
-    socklen_t addlen);
+ssize_t tfo_sendmsg(int sockfd, const struct msghdr* msg, int flags);
 
 /**
  * Enable TFO on a listening socket.
  */
 int tfo_enable(int sockfd, size_t max_queue_size);
-#endif
+
+/**
+ * Check if TFO succeeded in being used.
+ */
+bool tfo_succeeded(int sockfd);
 }
 }