1 files changed, 70 insertions, 0 deletions
diff --git a/fluent-bit/lib/librdkafka-2.1.0/src/rdrand.c b/fluent-bit/lib/librdkafka-2.1.0/src/rdrand.c
new file mode 100644
index 000000000..e36d79380
--- /dev/null
+++ b/fluent-bit/lib/librdkafka-2.1.0/src/rdrand.c
@@ -0,0 +1,70 @@
+/*
+ * librd - Rapid Development C library
+ *
+ * Copyright (c) 2012, Magnus Edenhill
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "rd.h"
+#include "rdrand.h"
+#include "rdtime.h"
+#include "tinycthread.h"
+
+int rd_jitter(int low, int high) {
+        int rand_num;
+#if HAVE_RAND_R
+        static RD_TLS unsigned int seed = 0;
+
+        /* Initial seed with time+thread id */
+        if (unlikely(seed == 0)) {
+                struct timeval tv;
+                rd_gettimeofday(&tv, NULL);
+                seed = (unsigned int)(tv.tv_usec / 1000);
+                seed ^= (unsigned int)(intptr_t)thrd_current();
+        }
+
+        rand_num = rand_r(&seed);
+#else
+        rand_num = rand();
+#endif
+        return (low + (rand_num % ((high - low) + 1)));
+}
+
+void rd_array_shuffle(void *base, size_t nmemb, size_t entry_size) {
+        int i;
+        void *tmp = rd_alloca(entry_size);
+
+        /* FIXME: Optimized version for word-sized entries. */
+
+        for (i = (int)nmemb - 1; i > 0; i--) {
+                int j = rd_jitter(0, i);
+                if (unlikely(i == j))
+                        continue;
+
+                memcpy(tmp, (char *)base + (i * entry_size), entry_size);
+                memcpy((char *)base + (i * entry_size),
+                       (char *)base + (j * entry_size), entry_size);
+                memcpy((char *)base + (j * entry_size), tmp, entry_size);
+        }
+}