virhostuptime: Introduce virHostBootTimeInit()

The idea is to offer callers an init function that they can call
independently to ensure that the global variables get
initialized.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NCole Robinson <crobinso@redhat.com>

src/libvirt_private.syms

@@ -2199,6 +2199,7 @@ virHostMemSetParameters;
 
 
 # util/virhostuptime.h
+virHostBootTimeInit;
 virHostGetBootTime;
 
 

src/util/virhostuptime.c

@@ -126,7 +126,7 @@ virHostGetBootTimeOnceInit(void)
 int
 virHostGetBootTime(unsigned long long *when)
 {
-    if (virOnce(&virHostGetBootTimeOnce, virHostGetBootTimeOnceInit) < 0)
+    if (virHostBootTimeInit() < 0)
         return -1;
 
     if (bootTimeErrno) {
@@ -137,3 +137,13 @@ virHostGetBootTime(unsigned long long *when)
     *when = bootTime;
     return 0;
 }
+
+
+int
+virHostBootTimeInit(void)
+{
+    if (virOnce(&virHostGetBootTimeOnce, virHostGetBootTimeOnceInit) < 0)
+        return -1;
+
+    return 0;
+}

src/util/virhostuptime.h

@@ -25,3 +25,6 @@
 int
 virHostGetBootTime(unsigned long long *when)
     G_GNUC_NO_INLINE;
+
+int
+virHostBootTimeInit(void);