Implement virHashRemoveAll function

Implement function to remove all entries of a hash table.

src/libvirt_private.syms

@@ -578,6 +578,7 @@ virHashForEach;
 virHashFree;
 virHashGetItems;
 virHashLookup;
+virHashRemoveAll;
 virHashRemoveEntry;
 virHashRemoveSet;
 virHashSearch;

src/util/virhash.c

@@ -575,6 +575,31 @@ virHashRemoveSet(virHashTablePtr table,
     return count;
 }
 
+static int
+_virHashRemoveAllIter(const void *payload ATTRIBUTE_UNUSED,
+                      const void *name ATTRIBUTE_UNUSED,
+                      const void *data ATTRIBUTE_UNUSED)
+{
+    return 1;
+}
+
+/**
+ * virHashRemoveAll
+ * @table: the hash table to clear
+ *
+ * Free the hash @table's contents. The userdata is
+ * deallocated with the function provided at creation time.
+ *
+ * Returns the number of items removed on success, -1 on failure
+ */
+ssize_t
+virHashRemoveAll(virHashTablePtr table)
+{
+    return virHashRemoveSet(table,
+                            _virHashRemoveAllIter,
+                            NULL);
+}
+
 /**
  * virHashSearch:
  * @table: the hash table to search

src/util/virhash.h

@@ -126,6 +126,11 @@ int virHashUpdateEntry(virHashTablePtr table,
 int virHashRemoveEntry(virHashTablePtr table,
                        const void *name);
 
+/*
+ * Remove all entries from the hash table.
+ */
+ssize_t virHashRemoveAll(virHashTablePtr table);
+
 /*
  * Retrieve the userdata.
  */