1 files changed, 168 insertions, 0 deletions
diff --git a/fluent-bit/tests/internal/ring_buffer.c b/fluent-bit/tests/internal/ring_buffer.c
new file mode 100644
index 00000000..0c0e2074
--- /dev/null
+++ b/fluent-bit/tests/internal/ring_buffer.c
@@ -0,0 +1,168 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+
+#include <fluent-bit/flb_info.h>
+#include <fluent-bit/flb_mem.h>
+#include <fluent-bit/flb_engine.h>
+#include <fluent-bit/flb_ring_buffer.h>
+#include <fluent-bit/flb_event_loop.h>
+#include <fluent-bit/flb_bucket_queue.h>
+
+#include "flb_tests_internal.h"
+
+struct check {
+    char *buf_a;
+    char *buf_b;
+};
+
+struct check checks[] = {
+    {"a1", "a2"},
+    {"b1", "b2"},
+    {"c1", "c2"},
+    {"d1", "d2"},
+    {"e1", "e2"},
+};
+
+static void test_basic()
+{
+    int i;
+    int ret;
+    int elements;
+    struct check *c;
+    struct check *tmp;
+    struct flb_ring_buffer *rb;
+
+    elements = sizeof(checks) / sizeof(struct check);
+
+    rb = flb_ring_buffer_create(sizeof(struct check *) * elements);
+    TEST_CHECK(rb != NULL);
+    if (!rb) {
+        exit(EXIT_FAILURE);
+    }
+
+    for (i = 0; i < elements; i++) {
+        c = &checks[i];
+        ret = flb_ring_buffer_write(rb, (void *) &c, sizeof(c));
+        TEST_CHECK(ret == 0);
+    }
+
+    /* try to write another record, it must fail */
+    tmp = c;
+    ret = flb_ring_buffer_write(rb, (void *) &tmp, sizeof(tmp));
+    TEST_CHECK(ret == -1);
+
+    c = NULL;
+
+    /* consume one entry */
+    ret = flb_ring_buffer_read(rb, (void *) &c, sizeof(c));
+    TEST_CHECK(ret == 0);
+
+    /* the consumed entry must be equal to the first one */
+    c = &checks[0];
+    TEST_CHECK(strcmp(c->buf_a, "a1") == 0 && strcmp(c->buf_b, "a2") ==0);
+
+    /* try 'again' to write 'c2', it should succeed */
+    ret = flb_ring_buffer_write(rb, (void *) &tmp, sizeof(tmp));
+    TEST_CHECK(ret == 0);
+
+    flb_ring_buffer_destroy(rb);
+}
+
+static void test_smart_flush()
+{
+    int i;
+    int ret;
+    int n_events;
+    int elements;
+    size_t slots;
+    uint64_t window;
+    struct check *c;
+    struct check *tmp;
+    int flush_event_detected;
+	char signal_buffer[512];
+    struct mk_event *event;
+    struct mk_event_loop *evl;
+    struct flb_ring_buffer *rb;
+    struct flb_bucket_queue *bktq;
+
+#ifdef _WIN32
+    WSADATA wsa_data;
+    WSAStartup(0x0201, &wsa_data);
+#endif
+
+    evl = mk_event_loop_create(100);
+    TEST_CHECK(evl != NULL);
+    if (!evl) {
+        exit(EXIT_FAILURE);
+    }
+
+    bktq = flb_bucket_queue_create(10);
+    TEST_CHECK(bktq != NULL);
+    if (!bktq) {
+        exit(EXIT_FAILURE);
+    }
+
+    elements = sizeof(checks) / sizeof(struct check);
+    slots = elements * 2;
+    window = (((double) (elements + 1)) / slots) * 100;
+
+    /* The slot count was chosen to trigger the flush request
+     * after writing the predefined elements + 1
+     */
+
+    rb = flb_ring_buffer_create(sizeof(struct check *) * slots);
+    TEST_CHECK(rb != NULL);
+    if (!rb) {
+        exit(EXIT_FAILURE);
+    }
+
+    ret = flb_ring_buffer_add_event_loop(rb, evl, window);
+    TEST_CHECK(ret == 0);
+    if (ret) {
+        exit(EXIT_FAILURE);
+    }
+
+    for (i = 0; i < elements; i++) {
+        c = &checks[i];
+        ret = flb_ring_buffer_write(rb, (void *) &c, sizeof(c));
+        TEST_CHECK(ret == 0);
+
+        n_events = mk_event_wait_2(evl, 0);
+        TEST_CHECK(n_events == 0);
+    }
+
+    /* write another record, a signal must be produced */
+    ret = flb_ring_buffer_write(rb, (void *) &tmp, sizeof(tmp));
+    TEST_CHECK(ret == 0);
+
+    n_events = mk_event_wait_2(evl, 0);
+    TEST_CHECK(n_events == 1);
+
+    flush_event_detected = FLB_FALSE;
+    flb_event_priority_live_foreach(event, bktq, evl, 10) {
+        if(event->type == FLB_ENGINE_EV_THREAD_INPUT) {
+            flb_pipe_r(event->fd, signal_buffer, sizeof(signal_buffer));
+
+		    flush_event_detected = FLB_TRUE;
+        }
+    }
+
+    TEST_CHECK(flush_event_detected == FLB_TRUE);
+
+    /* write another record, a signal must not be produced because the previous one
+     * was not acknowledged by setting `flush_pending` to `FLB_FALSE`
+     */
+    ret = flb_ring_buffer_write(rb, (void *) &tmp, sizeof(tmp));
+    TEST_CHECK(ret == 0);
+
+    n_events = mk_event_wait_2(evl, 0);
+    TEST_CHECK(n_events == 0);
+
+    flb_ring_buffer_destroy(rb);
+    flb_bucket_queue_destroy(bktq);
+    mk_event_loop_destroy(evl);
+}
+TEST_LIST = {
+    { "basic",       test_basic},
+    { "smart_flush", test_smart_flush},
+    { 0 }
+};