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Diffstat (limited to 'libc/sysdeps/linux/common/sched_getaffinity.c')
-rw-r--r--libc/sysdeps/linux/common/sched_getaffinity.c52
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