Impl. linux syscalls sched_getaffinity/sched_setaffinity but

protect its use by #ifdef INTERNAL_SYSCALL since not all
arch's has INTERNAL_SYSCALL.

All arch's not having INTERNAL_SYSCALL in 
libc/sysdeps/linux/<arch>/bits/syscalls.h should get an update
from glibc.

1 files changed, 52 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/common/sched_getaffinity.c b/libc/sysdeps/linux/common/sched_getaffinity.c
new file mode 100644
index 000000000..da1acc855
--- /dev/null
+++ b/libc/sysdeps/linux/common/sched_getaffinity.c
@@ -0,0 +1,52 @@
+/* Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <features.h>
+#ifdef __USE_GNU
+
+#include <sched.h>
+#include <sys/types.h>
+#include <sys/syscall.h>
+
+#ifdef INTERNAL_SYSCALL /* remove this when all archs has this #defined */
+
+#include <string.h>
+#include <sys/param.h>
+#include <sys/types.h>
+
+libc_hidden_proto(memset)
+
+#define __NR___syscall_sched_getaffinity __NR_sched_getaffinity
+static inline _syscall3(int, __syscall_sched_getaffinity, __kernel_pid_t, pid,
+			size_t, cpusetsize, cpu_set_t *, cpuset);
+
+int sched_getaffinity(pid_t pid, size_t cpusetsize, cpu_set_t *cpuset)
+{
+	int res = (__syscall_sched_getaffinity(pid, MIN(INT_MAX, cpusetsize),
+					       cpuset));
+
+	if (res != -1) {
+		/* Clean the rest of the memory the kernel didn't do.  */
+		memset ((char *) cpuset + res, '\0', cpusetsize - res);
+
+		res = 0;
+	}
+	return res;
+}
+#endif
+#endif