osdep: add getloadavg
getloadavg is supported on Linux, BSDs, Solaris.
Following man page:
RETURN VALUE
If the load average was unobtainable, -1 is returned; otherwise,
the number of samples actually retrieved is returned.
accordingly, make stub for systems which don't support this function return -1
for consistency.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
diff --git a/include/qemu/osdep.h b/include/qemu/osdep.h
index 475a1c6..d30ba73 100644
--- a/include/qemu/osdep.h
+++ b/include/qemu/osdep.h
@@ -779,6 +779,16 @@
}
#endif /* !HAVE_SYSTEM_FUNCTION */
+/**
+ * If the load average was unobtainable, -1 is returned
+ */
+#ifndef HAVE_GETLOADAVG_FUNCTION
+static inline int getloadavg(double loadavg[], int nelem)
+{
+ return -1;
+}
+#endif /* !HAVE_GETLOADAVG_FUNCTION */
+
#ifdef __cplusplus
}
#endif
diff --git a/meson.build b/meson.build
index ec01f8b..d2c4c2a 100644
--- a/meson.build
+++ b/meson.build
@@ -2293,6 +2293,7 @@
config_host_data.set('HAVE_OPENPTY', cc.has_function('openpty', dependencies: util))
config_host_data.set('HAVE_STRCHRNUL', cc.has_function('strchrnul'))
config_host_data.set('HAVE_SYSTEM_FUNCTION', cc.has_function('system', prefix: '#include <stdlib.h>'))
+config_host_data.set('HAVE_GETLOADAVG_FUNCTION', cc.has_function('getloadavg', prefix: '#include <stdlib.h>'))
if rbd.found()
config_host_data.set('HAVE_RBD_NAMESPACE_EXISTS',
cc.has_function('rbd_namespace_exists',
