This can be used to tell if a talloc stackframe is currently
available. Callers can use this to decide if they will use
talloc_tos() or instead use an alternative strategy. This gives us a
way to safely have calls to talloc_tos() in common code that may end
up in external libraries, as long as all talloc_tos() calls in these
pieces of common code check first that a stackframe is available.
return ts->talloc_stack[ts->talloc_stacksize-1];
}
+
+/*
+ * return true if a talloc stackframe exists
+ * this can be used to prevent memory leaks for code that can
+ * optionally use a talloc stackframe (eg. nt_errstr())
+ */
+
+bool talloc_stackframe_exists(void)
+{
+ struct talloc_stackframe *ts =
+ (struct talloc_stackframe *)SMB_THREAD_GET_TLS(global_ts);
+
+ if (ts == NULL || ts->talloc_stacksize == 0) {
+ return false;
+ }
+ return true;
+}
TALLOC_CTX *talloc_tos(void);
+/*
+ * return true if a talloc stackframe exists
+ * this can be used to prevent memory leaks for code that can
+ * optionally use a talloc stackframe (eg. nt_errstr())
+ */
+
+bool talloc_stackframe_exists(void);
+
#endif