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/msync.c | 29 +++++++++++++++++++++++------
 1 file changed, 23 insertions(+), 6 deletions(-)

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

diff --git a/libc/sysdeps/linux/common/msync.c b/libc/sysdeps/linux/common/msync.c
index 7a46f0c32..2629bd4aa 100644
--- a/libc/sysdeps/linux/common/msync.c
+++ b/libc/sysdeps/linux/common/msync.c
@@ -9,16 +9,33 @@
 
 #include <sys/syscall.h>
 #include <unistd.h>
+#include <sys/mman.h>
 
-#if defined __NR_msync && defined __ARCH_USE_MMU__
+#ifdef __UCLIBC_HAS_THREADS_NATIVE__
+#include <sysdep-cancel.h>
+#else
+#define SINGLE_THREAD_P 1
+#endif
 
-#include <sys/mman.h>
+#define __NR___syscall_msync __NR_msync
+static __always_inline _syscall3(int, __syscall_msync, void *, addr, size_t, length,
+						int, flags)
 
-#ifdef __LINUXTHREADS_OLD__
-extern __typeof(msync) weak_function msync;
-strong_alias(msync,__libc_msync)
+extern __typeof(msync) __libc_msync;
+int __libc_msync(void * addr, size_t length, int flags)
+{
+#ifdef __UCLIBC_HAS_THREADS_NATIVE__
+	int oldtype, result;
 #endif
 
-_syscall3(int, msync, void *, addr, size_t, length, int, flags)
+	if (SINGLE_THREAD_P)
+		return __syscall_msync(addr, length, flags);
 
+#ifdef __UCLIBC_HAS_THREADS_NATIVE__
+	oldtype = LIBC_CANCEL_ASYNC ();
+	result = __syscall_msync(addr, length, flags);
+	LIBC_CANCEL_RESET (oldtype);
+	return result;
 #endif
+}
+weak_alias(__libc_msync,msync)
-- 
cgit v1.2.3