Add non-blocking capability for TCP sockets

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1996 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 5 insertions, 2 deletions

diff --git a/nuttx/net/net_internal.h b/nuttx/net/net_internal.h
index a403a269f..a4b1fe4dd 100644
--- a/nuttx/net/net_internal.h
+++ b/nuttx/net/net_internal.h
@@ -53,13 +53,14 @@
 
 /* Definitions of 8-bit socket flags */
 
-                                  /* Bits 0:2 : Socket state */
+                                  /* Bits 0-2: Socket state */
 #define _SF_IDLE            0x00  /* There is no socket activity */
 #define _SF_ACCEPT          0x01  /* Socket is waiting to accept a connection */
 #define _SF_RECV            0x02  /* Waiting for recv action to complete */
 #define _SF_SEND            0x03  /* Waiting for send action to complete */
 #define _SF_MASK            0x03  /* Mask to isolate the above actions */
-                                  /* Bits 3:4 : unused */
+                                  /* Bit 3: unused */
+#define _SF_NONBLOCK        0x10  /* Bit 4: Don't block if no data (TCP/READ only) */
 #define _SF_LISTENING       0x20  /* Bit 5: SOCK_STREAM is listening */
 #define _SF_BOUND           0x40  /* Bit 6: SOCK_STREAM is bound to an address */
 #define _SF_CONNECTED       0x80  /* Bit 7: SOCK_STREAM is connected */
@@ -69,6 +70,8 @@
 #define _SS_SETSTATE(s,f)   (((s) & ~_SF_MASK) | (f))
 #define _SS_GETSTATE(s)     ((s) & _SF_MASK)
 #define _SS_ISBUSY(s)       (_SS_GETSTATE(s) != _SF_IDLE)
+
+#define _SS_ISNONBLOCK(s)   (((s) & _SF_NONBLOCK)  != 0)
 #define _SS_ISLISTENING(s)  (((s) & _SF_LISTENING) != 0)
 #define _SS_ISBOUND(s)      (((s) & _SF_CONNECTED) != 0)
 #define _SS_ISCONNECTED(s)  (((s) & _SF_CONNECTED) != 0)