From 57e8823548ad6e65d33b2153edeb18fb0edc20e6 Mon Sep 17 00:00:00 2001
From: Austin Foxley <austinf@cetoncorp.com>
Date: Sat, 17 Oct 2009 14:32:36 -0700
Subject: cancellation support for a large amount of the required syscalls

Signed-off-by: Austin Foxley <austinf@cetoncorp.com>
---
 libc/sysdeps/linux/common/__syscall_fcntl.c | 90 +++++++++++++++++++++--------
 1 file changed, 66 insertions(+), 24 deletions(-)

(limited to 'libc/sysdeps/linux/common/__syscall_fcntl.c')

diff --git a/libc/sysdeps/linux/common/__syscall_fcntl.c b/libc/sysdeps/linux/common/__syscall_fcntl.c
index 355b22b00..6a966d7df 100644
--- a/libc/sysdeps/linux/common/__syscall_fcntl.c
+++ b/libc/sysdeps/linux/common/__syscall_fcntl.c
@@ -2,6 +2,7 @@
 /*
  * __syscall_fcntl() for uClibc
  *
+ * Copyright (C) 2006 Steven J. Hill <sjhill@realitydiluted.com>
  * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
  *
  * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
@@ -9,42 +10,83 @@
 
 #include <sys/syscall.h>
 #include <stdarg.h>
+#ifdef __UCLIBC_HAS_THREADS_NATIVE__
+#include <sysdep-cancel.h>	/* Must come before <fcntl.h>.  */
+#endif
 #include <fcntl.h>
 #include <bits/wordsize.h>
 
-#define __NR___syscall_fcntl __NR_fcntl
-static __always_inline
-_syscall3(int, __syscall_fcntl, int, fd, int, cmd, long, arg)
+extern __typeof(fcntl) __libc_fcntl;
+libc_hidden_proto(__libc_fcntl) 
 
-int fcntl(int fd, int cmd, ...)
-{
-	long arg;
-	va_list list;
+#ifdef __UCLIBC_HAS_THREADS_NATIVE__
+int __fcntl_nocancel (int fd, int cmd, ...)
+{   
+	va_list ap;
+	void *arg;
 
-	va_start(list, cmd);
-	arg = va_arg(list, long);
-	va_end(list);
+	va_start (ap, cmd);
+	arg = va_arg (ap, void *);
+	va_end (ap);
 
-#if __WORDSIZE == 32
+# if __WORDSIZE == 32
 	if (cmd == F_GETLK64 || cmd == F_SETLK64 || cmd == F_SETLKW64) {
-#if defined __UCLIBC_HAS_LFS__ && defined __NR_fcntl64
-		return fcntl64(fd, cmd, arg);
-#else
+#  if defined __UCLIBC_HAS_LFS__ && defined __NR_fcntl64
+		return INLINE_SYSCALL (fcntl64, 3, fd, cmd, arg);
+#  else
 		__set_errno(ENOSYS);
 		return -1;
-#endif
+#  endif
 	}
+# endif
+	return INLINE_SYSCALL (fcntl, 3, fd, cmd, arg);
+}
 #endif
 
-	return (__syscall_fcntl(fd, cmd, arg));
-}
-#ifndef __LINUXTHREADS_OLD__
-libc_hidden_def(fcntl)
+int __libc_fcntl (int fd, int cmd, ...)
+{
+	va_list ap;
+	void *arg;
+
+	va_start (ap, cmd);
+	arg = va_arg (ap, void *);
+	va_end (ap);
+
+#ifdef __UCLIBC_HAS_THREADS_NATIVE__
+	if (SINGLE_THREAD_P || (cmd != F_SETLKW && cmd != F_SETLKW64))
+# if defined __UCLIBC_HAS_LFS__ && defined __NR_fcntl64
+		return INLINE_SYSCALL (fcntl64, 3, fd, cmd, arg);
+# else
+		return INLINE_SYSCALL (fcntl, 3, fd, cmd, arg);
+# endif
+
+	int oldtype = LIBC_CANCEL_ASYNC ();
+
+# if defined __UCLIBC_HAS_LFS__ && defined __NR_fcntl64
+	int result = INLINE_SYSCALL (fcntl64, 3, fd, cmd, arg);
+# else
+	int result = INLINE_SYSCALL (fcntl, 3, fd, cmd, arg);
+# endif
+
+	LIBC_CANCEL_RESET (oldtype);
+
+	return result;
 #else
-libc_hidden_weak(fcntl)
-strong_alias(fcntl,__libc_fcntl)
+# if __WORDSIZE == 32
+	if (cmd == F_GETLK64 || cmd == F_SETLK64 || cmd == F_SETLKW64) {
+#  if defined __UCLIBC_HAS_LFS__ && defined __NR_fcntl64
+		return INLINE_SYSCALL (fcntl64, 3, fd, cmd, arg);
+#  else
+		__set_errno(ENOSYS);
+		return -1;
+#  endif
+	}
+# endif
+	return INLINE_SYSCALL (fcntl, 3, fd, cmd, arg);
 #endif
+}
+libc_hidden_def(__libc_fcntl)
 
-#if ! defined __NR_fcntl64 && defined __UCLIBC_HAS_LFS__
-strong_alias(fcntl,fcntl64)
-#endif
+libc_hidden_proto(fcntl)
+weak_alias(__libc_fcntl,fcntl)
+libc_hidden_weak(fcntl)
-- 
cgit v1.2.3