Move wmem to wsutil

This allows wmem to be used from other libraries, namely wsutil.
It is often the case that a funtion exists in wsutil and cannot
be used with a wmem scope, requiring some code duplication or
extra memory allocations, or vice-versa, code in epan cannot be
moved to wsutil because it has a wmem dependency.

To this end wmem is moved to wsutil. Scope management remains part
of epan because those scope semantics are specific to dissection.

1 files changed, 57 insertions, 0 deletions

diff --git a/wsutil/wmem/wmem_stack.c b/wsutil/wmem/wmem_stack.c
new file mode 100644
index 0000000000..ae1f695b2a
--- /dev/null
+++ b/wsutil/wmem/wmem_stack.c
@@ -0,0 +1,57 @@
+/* wmem_stack.c
+ * Wireshark Memory Manager Stack
+ * Copyright 2012, Evan Huus <eapache@gmail.com>
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include <string.h>
+#include <glib.h>
+
+#include "wmem-int.h"
+#include "wmem_core.h"
+#include "wmem_stack.h"
+#include "wmem_list.h"
+
+/* Wmem stack is implemented as a simple wrapper over Wmem list */
+
+void *
+wmem_stack_peek(const wmem_stack_t *stack)
+{
+    wmem_list_frame_t *frame;
+
+    frame = wmem_list_head(stack);
+
+    ASSERT(frame);
+
+    return wmem_list_frame_data(frame);
+}
+
+void *
+wmem_stack_pop(wmem_stack_t *stack)
+{
+    void *data;
+
+    data = wmem_stack_peek(stack);
+
+    wmem_list_remove(stack, data);
+
+    return data;
+}
+
+/*
+ * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
+ *
+ * Local variables:
+ * c-basic-offset: 4
+ * tab-width: 8
+ * indent-tabs-mode: nil
+ * End:
+ *
+ * vi: set shiftwidth=4 tabstop=8 expandtab:
+ * :indentSize=4:tabSize=8:noTabs=true:
+ */