fix return value of pthread_getaffinity_np and pthread_setaffinity_np

these functions are expected to return an error code rather than
setting errno and returning -1.

diff --git a/src/sched/affinity.c b/src/sched/affinity.c
index 737e41b..948ece4 100644 (file)
--- a/src/sched/affinity.c
+++ b/src/sched/affinity.c
@@ -11,20 +11,23 @@ int sched_setaffinity(pid_t tid, size_t size, const cpu_set_t *set)
 
 int pthread_setaffinity_np(pthread_t td, size_t size, const cpu_set_t *set)
 {
-       return syscall(SYS_sched_setaffinity, td->tid, size, set);
+       return -__syscall(SYS_sched_setaffinity, td->tid, size, set);
 }
 
-int sched_getaffinity(pid_t tid, size_t size, cpu_set_t *set)
+static int do_getaffinity(pid_t tid, size_t size, cpu_set_t *set)
 {
        long ret = __syscall(SYS_sched_getaffinity, tid, size, set);
-       if (ret > 0) {
-               if (ret < size) memset((char *)set+ret, 0, size-ret);
-               ret = 0;
-       }
-       return __syscall_ret(ret);
+       if (ret < 0) return ret;
+       if (ret < size) memset((char *)set+ret, 0, size-ret);
+       return 0;
+}
+
+int sched_getaffinity(pid_t tid, size_t size, cpu_set_t *set)
+{
+       return __syscall_ret(do_getaffinity(tid, size, set));
 }
 
 int pthread_getaffinity_np(pthread_t td, size_t size, cpu_set_t *set)
 {
-       return sched_getaffinity(td->tid, size, set);
+       return -do_getaffinity(td->tid, size, set);
 }