2001-08-22 Roland McGrath <roland@frob.com>

	* sysdeps/generic/bits/poll.h (POLLWRBAND): New alias for POLLOUT.
	(POLLRDNORM, POLLRDBAND, POLLWRNORM, POLLWRBAND): Make these
	definitions conditional on [__USE_XOPEN].

diff --git a/bits/poll.h b/bits/poll.h
index a3da430..022a06c 100644 (file)
--- a/bits/poll.h
+++ b/bits/poll.h
@@ -27,10 +27,13 @@
 #define POLLPRI                02              /* There is urgent data to read.  */
 #define POLLOUT                04              /* Writing now will not block.  */
 
-/* Some aliases.  */
-#define POLLWRNORM     POLLOUT
-#define POLLRDNORM     POLLIN
-#define POLLRDBAND     POLLPRI
+#ifdef __USE_XOPEN
+/* These values are defined in XPG4.2.  */
+# define POLLRDNORM    POLLIN          /* Normal data may be read.  */
+# define POLLRDBAND    POLLPRI         /* Priority data may be read.  */
+# define POLLWRNORM    POLLOUT         /* Writing now will not block.  */
+# define POLLWRBAND    POLLOUT         /* Priority data may be written.  */
+#endif
 
 /* Event types always implicitly polled for.  These bits need not be set in
    `events', but they will appear in `revents' to indicate the status of

diff --git a/sysdeps/generic/bits/poll.h b/sysdeps/generic/bits/poll.h
index a3da430..022a06c 100644 (file)
--- a/sysdeps/generic/bits/poll.h
+++ b/sysdeps/generic/bits/poll.h
@@ -27,10 +27,13 @@
 #define POLLPRI                02              /* There is urgent data to read.  */
 #define POLLOUT                04              /* Writing now will not block.  */
 
-/* Some aliases.  */
-#define POLLWRNORM     POLLOUT
-#define POLLRDNORM     POLLIN
-#define POLLRDBAND     POLLPRI
+#ifdef __USE_XOPEN
+/* These values are defined in XPG4.2.  */
+# define POLLRDNORM    POLLIN          /* Normal data may be read.  */
+# define POLLRDBAND    POLLPRI         /* Priority data may be read.  */
+# define POLLWRNORM    POLLOUT         /* Writing now will not block.  */
+# define POLLWRBAND    POLLOUT         /* Priority data may be written.  */
+#endif
 
 /* Event types always implicitly polled for.  These bits need not be set in
    `events', but they will appear in `revents' to indicate the status of