Update contrib/libs/ngtcp2 to 1.15.1

commit_hash:b2f5dc7047d3d3a77ccd864c0e4bf1d99c87247c

1 files changed, 59 insertions, 0 deletions

diff --git a/contrib/libs/ngtcp2/lib/ngtcp2_ratelim.h b/contrib/libs/ngtcp2/lib/ngtcp2_ratelim.h
new file mode 100644
index 00000000000..14485c562d4
--- /dev/null
+++ b/contrib/libs/ngtcp2/lib/ngtcp2_ratelim.h
@@ -0,0 +1,59 @@
+/*
+ * ngtcp2
+ *
+ * Copyright (c) 2025 ngtcp2 contributors
+ * Copyright (c) 2023 nghttp2 contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef NGTCP2_RATELIM_H
+#define NGTCP2_RATELIM_H
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif /* HAVE_CONFIG_H */
+
+#include <ngtcp2/ngtcp2.h>
+
+typedef struct ngtcp2_ratelim {
+  /* burst is the maximum number of tokens. */
+  uint64_t burst;
+  /* rate is the rate of token generation measured by token /
+     second. */
+  uint64_t rate;
+  /* tokens is the amount of tokens available to drain. */
+  uint64_t tokens;
+  /* carry is the partial token gained in sub-second period.  It is
+     added to the computation in the next update round. */
+  uint64_t carry;
+  /* ts is the last timestamp that is known to this object. */
+  ngtcp2_tstamp ts;
+} ngtcp2_ratelim;
+
+/* ngtcp2_ratelim_init initializes |rlim| with the given
+   parameters. */
+void ngtcp2_ratelim_init(ngtcp2_ratelim *rlim, uint64_t burst, uint64_t rate,
+                         ngtcp2_tstamp ts);
+
+/* ngtcp2_ratelim_drain drains |n| from rlim->tokens.  It returns 0 if
+   it succeeds, or -1. */
+int ngtcp2_ratelim_drain(ngtcp2_ratelim *rlim, uint64_t n, ngtcp2_tstamp ts);
+
+#endif /* !defined(NGTCP2_RATELIM_H) */