Initial version.

src/nxt_source.h

@@ -0,0 +1,43 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ * Copyright (C) NGINX, Inc.
+ */
+
+#ifndef _NXT_SOURCE_H_INCLUDED_
+#define _NXT_SOURCE_H_INCLUDED_
+
+
+/*
+ * A source handler should store a pointer to a passed source hook, but not
+ * the hook's values themselves, because a source filter may change the values.
+ */
+typedef struct {
+    void                *context;
+    nxt_work_handler_t  filter;
+} nxt_source_hook_t;
+
+
+typedef void (*nxt_source_handler_t)(void *source_context,
+    nxt_source_hook_t *query);
+
+
+#define                                                                       \
+nxt_source_filter(thr, wq, next, out)                                         \
+    do {                                                                      \
+        if (thr->engine->batch != 0) {                                        \
+            nxt_thread_work_queue_add(thr, wq, nxt_source_filter_handler,     \
+                                      next, out, thr->log);                   \
+                                                                              \
+        } else {                                                              \
+            (next)->filter(thr, (next)->context, out);                        \
+        }                                                                     \
+                                                                              \
+    } while (0)
+
+
+NXT_EXPORT void nxt_source_filter_handler(nxt_thread_t *thr, void *obj,
+    void *data);
+
+
+#endif /* _NXT_SOURCE_H_INCLUDED_ */