diff options
Diffstat (limited to 'libpthread/nptl/sysdeps/unix/sysv/linux/pthread_attr_getaffinity.c')
-rw-r--r-- | libpthread/nptl/sysdeps/unix/sysv/linux/pthread_attr_getaffinity.c | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/pthread_attr_getaffinity.c b/libpthread/nptl/sysdeps/unix/sysv/linux/pthread_attr_getaffinity.c new file mode 100644 index 000000000..2ec2f3d74 --- /dev/null +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/pthread_attr_getaffinity.c @@ -0,0 +1,54 @@ +/* Copyright (C) 2003, 2004 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@redhat.com>, 2003. + + 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 <assert.h> +#include <errno.h> +#include <pthreadP.h> +#include <string.h> +#include <sysdep.h> +#include <sys/types.h> + + +int +pthread_attr_getaffinity_np(const pthread_attr_t *attr, size_t cpusetsize, + cpu_set_t *cpuset) +{ + const struct pthread_attr *iattr; + + assert (sizeof (*attr) >= sizeof (struct pthread_attr)); + iattr = (const struct pthread_attr *) attr; + + if (iattr->cpuset != NULL) + { + /* Check whether there are any bits set beyond the limits + the user requested. */ + for (size_t cnt = cpusetsize; cnt < iattr->cpusetsize; ++cnt) + if (((char *) iattr->cpuset)[cnt] != 0) + return EINVAL; + + void *p = mempcpy (cpuset, iattr->cpuset, iattr->cpusetsize); + if (cpusetsize > iattr->cpusetsize) + memset (p, '\0', cpusetsize - iattr->cpusetsize); + } + else + /* We have no information. */ + memset (cpuset, -1, cpusetsize); + + return 0; +} |