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authorUlrich Drepper <drepper@redhat.com>2004-03-19 00:14:42 +0000
committerUlrich Drepper <drepper@redhat.com>2004-03-19 00:14:42 +0000
commit439ff07be06e9354151f984c7d0d2fb05917e8be (patch)
tree2c3471a5c7e73d1f6a043b082266e7248b992c02 /sysdeps/unix
parent701a7b234eab5615adb472b5dc5b0a9199d69f9b (diff)
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Update.
2004-03-18 Ulrich Drepper <drepper@redhat.com> * posix/sched.h: Change sched_getaffinity and sched_setaffinity interfaces: add new second parameter. * sysdeps/generic/sched_getaffinity.c: Implement interface change. * sysdeps/generic/sched_setaffinity.c: Likewise. * sysdeps/unix/sysv/linux/sched_getaffinity.c: Likewise. Add compatibility interface. * sysdeps/unix/sysv/linux/sched_setaffinity.c: Likewise. * sysdeps/unix/sysv/linux/Versions: Add versions for changed interfaces.
Diffstat (limited to 'sysdeps/unix')
-rw-r--r--sysdeps/unix/sysv/linux/Versions3
-rw-r--r--sysdeps/unix/sysv/linux/sched_getaffinity.c23
-rw-r--r--sysdeps/unix/sysv/linux/sched_setaffinity.c59
3 files changed, 74 insertions, 11 deletions
diff --git a/sysdeps/unix/sysv/linux/Versions b/sysdeps/unix/sysv/linux/Versions
index 6a60315ee4..0fa782a0d7 100644
--- a/sysdeps/unix/sysv/linux/Versions
+++ b/sysdeps/unix/sysv/linux/Versions
@@ -112,6 +112,9 @@ libc {
GLIBC_2.3.3 {
gnu_dev_major; gnu_dev_minor; gnu_dev_makedev;
}
+ GLIBC_2.3.4 {
+ sched_getaffinity; sched_setaffinity;
+ }
GLIBC_PRIVATE {
# needed by libpthread.
__libc_sigaction;
diff --git a/sysdeps/unix/sysv/linux/sched_getaffinity.c b/sysdeps/unix/sysv/linux/sched_getaffinity.c
index 12e6e1603a..09787f277f 100644
--- a/sysdeps/unix/sysv/linux/sched_getaffinity.c
+++ b/sysdeps/unix/sysv/linux/sched_getaffinity.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
+/* Copyright (C) 2002, 2003, 2004 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
@@ -21,25 +21,38 @@
#include <string.h>
#include <sysdep.h>
#include <sys/types.h>
+#include <shlib-compat.h>
#ifdef __NR_sched_getaffinity
int
-sched_getaffinity (pid, cpuset)
- pid_t pid;
- cpu_set_t *cpuset;
+__sched_getaffinity_new (pid_t pid, size_t cpusetsize, cpu_set_t *cpuset)
{
int res = INLINE_SYSCALL (sched_getaffinity, 3, pid, sizeof (cpu_set_t),
cpuset);
if (res != -1)
{
/* Clean the rest of the memory the kernel didn't do. */
- memset ((char *) cpuset + res, '\0', sizeof (cpu_set_t) - res);
+ memset ((char *) cpuset + res, '\0', cpusetsize - res);
res = 0;
}
return res;
}
+versioned_symbol (libc, __sched_getaffinity_new, sched_getaffinity,
+ GLIBC_2_3_4);
+
+
+# if SHLIB_COMPAT(libc, 2_3_3, 2_3_4)
+int
+attribute_compat_text_section
+__sched_getaffinity_old (const pthread_attr_t *attr, cpu_set_t *cpuset)
+{
+ /* The old interface by default assumed a 1024 processor bitmap. */
+ return __sched_getaffinity_new (attr, 128, cpuset);
+}
+compat_symbol (libc, __sched_getaffinity_old, sched_getaffinity, GLIBC_2_3_3);
+# endif
#else
# include <sysdeps/generic/sched_getaffinity.c>
#endif
diff --git a/sysdeps/unix/sysv/linux/sched_setaffinity.c b/sysdeps/unix/sysv/linux/sched_setaffinity.c
index c12c808b78..0e2d5b55e8 100644
--- a/sysdeps/unix/sysv/linux/sched_setaffinity.c
+++ b/sysdeps/unix/sysv/linux/sched_setaffinity.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
+/* Copyright (C) 2002, 2003, 2004 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
@@ -20,18 +20,65 @@
#include <sched.h>
#include <string.h>
#include <sysdep.h>
+#include <unistd.h>
#include <sys/types.h>
+#include <shlib-compat.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. */
+ return EINVAL;
+
+ 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, 2_3_3, 2_3_4)
int
-sched_setaffinity (pid, cpuset)
- pid_t pid;
- const cpu_set_t *cpuset;
+attribute_compat_text_section
+__sched_setaffinity_old (const pthread_attr_t *attr, const cpu_set_t *cpuset)
{
- return INLINE_SYSCALL (sched_setaffinity, 3, pid, sizeof (cpu_set_t),
- cpuset);
+ /* The old interface by default assumed a 1024 processor bitmap. */
+ return __sched_setaffinity_new (attr, 128, cpuset);
}
+compat_symbol (libc, __sched_setaffinity_old, sched_setaffinity, GLIBC_2_3_3);
+# endif
#else
# include <sysdeps/generic/sched_setaffinity.c>
#endif