Import glibc-mainline for 2006-08-16

git-svn-id: svn://svn.eglibc.org/fsf/trunk@4 7b3dc134-2b1b-0410-93df-9e9f96275f8d

1 files changed, 88 insertions, 0 deletions

diff --git a/libc/sysdeps/unix/sysv/linux/sched_setaffinity.c b/libc/sysdeps/unix/sysv/linux/sched_setaffinity.c
new file mode 100644
index 000000000..ccd3c8f51
--- /dev/null
+++ b/libc/sysdeps/unix/sysv/linux/sched_setaffinity.c
@@ -0,0 +1,88 @@
+/* Copyright (C) 2002, 2003, 2004, 2005 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 <errno.h>
+#include <sched.h>
+#include <string.h>
+#include <sysdep.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <shlib-compat.h>
+#include <alloca.h>
+
+
+#ifdef __NR_sched_setaffinity
+static size_t __kernel_cpumask_size;
+
+
+int
+__sched_setaffinity_new (pid_t pid, size_t cpusetsize, const cpu_set_t *cpuset)
+{
+  if (__builtin_expect (__kernel_cpumask_size == 0, 0))
+    {
+      INTERNAL_SYSCALL_DECL (err);
+      int res;
+
+      size_t psize = 128;
+      void *p = alloca (psize);
+
+      while (res = INTERNAL_SYSCALL (sched_getaffinity, err, 3, getpid (),
+				     psize, p),
+	     INTERNAL_SYSCALL_ERROR_P (res, err)
+	     && INTERNAL_SYSCALL_ERRNO (res, err) == EINVAL)
+	p = extend_alloca (p, psize, 2 * psize);
+
+      if (res == 0 || INTERNAL_SYSCALL_ERROR_P (res, err))
+	{
+	  __set_errno (INTERNAL_SYSCALL_ERRNO (res, err));
+	  return -1;
+	}
+
+      __kernel_cpumask_size = res;
+    }
+
+  /* We now know the size of the kernel cpumask_t.  Make sure the user
+     does not request to set a bit beyond that.  */
+  for (size_t cnt = __kernel_cpumask_size; cnt < cpusetsize; ++cnt)
+    if (((char *) cpuset)[cnt] != '\0')
+      {
+        /* Found a nonzero byte.  This means the user request cannot be
+	   fulfilled.  */
+	__set_errno (EINVAL);
+	return -1;
+      }
+
+  return INLINE_SYSCALL (sched_setaffinity, 3, pid, cpusetsize, cpuset);
+}
+versioned_symbol (libc, __sched_setaffinity_new, sched_setaffinity,
+		  GLIBC_2_3_4);
+
+
+# if SHLIB_COMPAT (libc, GLIBC_2_3_3, GLIBC_2_3_4)
+int
+attribute_compat_text_section
+__sched_setaffinity_old (pid_t pid, const cpu_set_t *cpuset)
+{
+  /* The old interface by default assumed a 1024 processor bitmap.  */
+  return __sched_setaffinity_new (pid, 128, cpuset);
+}
+compat_symbol (libc, __sched_setaffinity_old, sched_setaffinity, GLIBC_2_3_3);
+# endif
+#else
+# include <posix/sched_setaffinity.c>
+#endif