From 5d8dfe892a2ea89f706ee140c3bdcfd89fe03fda Mon Sep 17 00:00:00 2001
From: Mitja Felicijan <mitja.felicijan@gmail.com>
Date: Wed, 21 Jan 2026 22:40:55 +0100
Subject: Add Redis source code for testing

---
 examples/redis-unstable/src/eventnotifier.c | 98 +++++++++++++++++++++++++++++
 1 file changed, 98 insertions(+)
 create mode 100644 examples/redis-unstable/src/eventnotifier.c

(limited to 'examples/redis-unstable/src/eventnotifier.c')

diff --git a/examples/redis-unstable/src/eventnotifier.c b/examples/redis-unstable/src/eventnotifier.c
new file mode 100644
index 0000000..0a6c145
--- /dev/null
+++ b/examples/redis-unstable/src/eventnotifier.c
@@ -0,0 +1,98 @@
+/* eventnotifier.c -- An event notifier based on eventfd or pipe.
+ *
+ * Copyright (c) 2024-Present, Redis Ltd.
+ * All rights reserved.
+ *
+ * Licensed under your choice of (a) the Redis Source Available License 2.0
+ * (RSALv2); or (b) the Server Side Public License v1 (SSPLv1); or (c) the
+ * GNU Affero General Public License v3 (AGPLv3).
+ */
+
+#include "eventnotifier.h"
+
+#include <stdint.h>
+#include <unistd.h>
+#include <fcntl.h>
+#ifdef HAVE_EVENT_FD
+#include <sys/eventfd.h>
+#endif
+
+#include "anet.h"
+#include "zmalloc.h"
+
+eventNotifier* createEventNotifier(void) {
+    eventNotifier *en = zmalloc(sizeof(eventNotifier));
+    if (!en) return NULL;
+
+#ifdef HAVE_EVENT_FD
+    if ((en->efd = eventfd(0, EFD_NONBLOCK| EFD_CLOEXEC)) != -1) {
+        return en;
+    }
+#else
+    if (anetPipe(en->pipefd, O_CLOEXEC|O_NONBLOCK, O_CLOEXEC|O_NONBLOCK) != -1) {
+        return en;
+    }
+#endif
+
+    /* Clean up if error. */
+    zfree(en);
+    return NULL;
+}
+
+int getReadEventFd(struct eventNotifier *en) {
+#ifdef HAVE_EVENT_FD
+    return en->efd;
+#else
+    return en->pipefd[0];
+#endif
+}
+
+int getWriteEventFd(struct eventNotifier *en) {
+#ifdef HAVE_EVENT_FD
+    return en->efd;
+#else
+    return en->pipefd[1];
+#endif
+}
+
+int triggerEventNotifier(struct eventNotifier *en) {
+#ifdef HAVE_EVENT_FD
+    uint64_t u = 1;
+    if (write(en->efd, &u, sizeof(uint64_t)) == -1) {
+        return EN_ERR;
+    }
+#else
+    char buf[1] = {'R'};
+    if (write(en->pipefd[1], buf, 1) == -1) {
+        return EN_ERR;
+    }
+#endif
+    return EN_OK;
+}
+
+int handleEventNotifier(struct eventNotifier *en) {
+#ifdef HAVE_EVENT_FD
+    uint64_t u;
+    if (read(en->efd, &u, sizeof(uint64_t)) == -1) {
+        return EN_ERR;
+    }
+#else
+    char buf[1];
+    if (read(en->pipefd[0], buf, 1) == -1) {
+        return EN_ERR;
+    }
+#endif
+    return EN_OK;
+}
+
+void freeEventNotifier(struct eventNotifier *en) {
+#ifdef HAVE_EVENT_FD
+    close(en->efd);
+#else
+    close(en->pipefd[0]);
+    close(en->pipefd[1]);
+#endif
+
+    /* Free memory */
+    zfree(en);
+}
-- 
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