convert accept4() to use cancel.h macros

include/sys/socket.h

@@ -269,6 +269,7 @@ libc_hidden_proto(accept)
    __THROW.  */
 extern int accept4 (int __fd, __SOCKADDR_ARG __addr,
 		    socklen_t *__restrict __addr_len, int __flags);
+libc_hidden_proto(accept4)
 #endif
 
 /* Shut down all or part of the connection open on socket FD.

libc/inet/socketcalls.c

@@ -76,43 +76,24 @@ lt_libc_hidden(accept)
 #endif
 
 #ifdef L_accept4
-#ifdef __NR_accept4
-# define __NR___sys_accept4  __NR_accept4
-static _syscall4(int, __sys_accept4, int, fd, struct sockaddr *, addr, socklen_t *, addrlen, int, flags)
-int accept4(int fd, struct sockaddr *addr, socklen_t * addrlen, int flags)
-{
-	if (SINGLE_THREAD_P)
-		return __sys_accept4(fd, addr, addrlen, flags);
-#ifdef __UCLIBC_HAS_THREADS_NATIVE__
-	else {
-		int oldtype = LIBC_CANCEL_ASYNC ();
-		int result = __sys_accept4(fd, addr, addrlen, flags);
-		LIBC_CANCEL_RESET (oldtype);
-		return result;
-	}
-#endif
-}
-#elif defined(__NR_socketcall)
-int accept4(int fd, struct sockaddr *addr, socklen_t *addrlen, int flags)
+static int __NC(accept4)(int fd, struct sockaddr *addr, socklen_t *addrlen, int flags)
 {
+# ifdef __NR_accept4
+	return INLINE_SYSCALL(accept4, 4, fd, addr, addrlen, flags);
+# elif defined(__NR_socketcall)
 	unsigned long args[4];
 
 	args[0] = fd;
 	args[1] = (unsigned long) addr;
 	args[2] = (unsigned long) addrlen;
 	args[3] = flags;
-	if (SINGLE_THREAD_P)
-		return __socketcall(SYS_ACCEPT4, args);
-#ifdef __UCLIBC_HAS_THREADS_NATIVE__
-	else {
-		int oldtype = LIBC_CANCEL_ASYNC ();
-		int result = __socketcall(SYS_ACCEPT4, args);
-		LIBC_CANCEL_RESET (oldtype);
-		return result;
-	}
+
+	return __socketcall(SYS_ACCEPT4, args);
 #endif
 }
-#endif
+CANCELLABLE_SYSCALL(int, accept4, (int fd, struct sockaddr *addr, socklen_t *addrlen, int flags),
+		    (fd, addr, addrlen, flags))
+lt_libc_hidden(accept4)
 #endif
 
 #ifdef L_bind

libpthread/linuxthreads/wrapsyscall.c

@@ -192,6 +192,13 @@ CANCELABLE_SYSCALL (int, accept, (int fd, __SOCKADDR_ARG addr,
 				  socklen_t *addr_len),
 		    (fd, addr, addr_len))
 
+#if defined __UCLIBC_LINUX_SPECIFIC__
+/* accept4(2).  */
+CANCELABLE_SYSCALL (int, accept4, (int fd, __SOCKADDR_ARG addr,
+				  socklen_t *addr_len, int flags),
+		    (fd, addr, addr_len, flags))
+#endif
+
 /* connect(2).  */
 CANCELABLE_SYSCALL (int, connect, (int fd, __CONST_SOCKADDR_ARG addr,
 				     socklen_t len),