epoll: redo cancellation to match master

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

libc/sysdeps/linux/common/epoll.c

@@ -9,7 +9,11 @@
 
 #include <sys/syscall.h>
 #include <sys/epoll.h>
-#include <cancel.h>
+#ifdef __UCLIBC_HAS_THREADS_NATIVE__
+# include <sysdep-cancel.h>
+#else
+# define SINGLE_THREAD_P 1
+#endif
 
 /*
  * epoll_create()
@@ -36,12 +40,21 @@ _syscall4(int,epoll_ctl, int, epfd, int, op, int, fd, struct epoll_event *, even
  * epoll_wait()
  */
 #ifdef __NR_epoll_wait
-static int __NC(epoll_wait)(int epfd, struct epoll_event *events, int maxevents, int timeout)
+extern __typeof(epoll_wait) __libc_epoll_wait;
+int __libc_epoll_wait(int epfd, struct epoll_event *events, int maxevents, int timeout)
 {
-	return INLINE_SYSCALL(epoll_wait, 4, epfd, events, maxevents, timeout);
+	if (SINGLE_THREAD_P)
+		return INLINE_SYSCALL(epoll_wait, 4, epfd, events, maxevents, timeout);
+# ifdef __UCLIBC_HAS_THREADS_NATIVE__
+	else {
+		int oldtype = LIBC_CANCEL_ASYNC ();
+		int result = INLINE_SYSCALL(epoll_wait, 4, epfd, events, maxevents, timeout);
+		LIBC_CANCEL_RESET (oldtype);
+		return result;
+	}
+# endif
 }
-CANCELLABLE_SYSCALL(int, epoll_wait, (int epfd, struct epoll_event *events, int maxevents, int timeout),
-		    (epfd, events, maxevents, timeout))
+weak_alias(__libc_epoll_wait, epoll_wait)
 #endif
 
 /*
@@ -50,16 +63,20 @@ CANCELLABLE_SYSCALL(int, epoll_wait, (int epfd, struct epoll_event *events, int
 #ifdef __NR_epoll_pwait
 # include <signal.h>
 
-# define __NR___syscall_epoll_pwait __NR_epoll_pwait
-static __always_inline _syscall6(int, __syscall_epoll_pwait, int, epfd, struct epoll_event *, events,
-				 int, maxevents, int, timeout, const sigset_t *, sigmask, size_t, sigsetsize)
-
-static int __NC(epoll_pwait)(int epfd, struct epoll_event *events, int maxevents, int timeout,
-			     const sigset_t *set)
+extern __typeof(epoll_pwait) __libc_epoll_pwait;
+int __libc_epoll_pwait(int epfd, struct epoll_event *events, int maxevents,
+						int timeout, const sigset_t *set)
 {
-	return __syscall_epoll_pwait(epfd, events, maxevents, timeout, set, __SYSCALL_SIGSET_T_SIZE);
+	if (SINGLE_THREAD_P)
+		return INLINE_SYSCALL(epoll_pwait, 6, epfd, events, maxevents, timeout, set, _NSIG / 8);
+# ifdef __UCLIBC_HAS_THREADS_NATIVE__
+	else {
+		int oldtype = LIBC_CANCEL_ASYNC ();
+		int result = INLINE_SYSCALL(epoll_pwait, 6, epfd, events, maxevents, timeout, set, _NSIG / 8);
+		LIBC_CANCEL_RESET (oldtype);
+		return result;
+	}
+# endif
 }
-CANCELLABLE_SYSCALL(int, epoll_pwait, (int epfd, struct epoll_event *events, int maxevents, int timeout,
-				       const sigset_t *set),
-		    (epfd, events, maxevents, timeout, set))
+weak_alias(__libc_epoll_pwait, epoll_pwait)
 #endif