1 files changed, 25 insertions, 0 deletions
diff --git a/src/lib/mempool.c b/src/lib/mempool.c
new file mode 100644
index 0000000..a657481
--- /dev/null
+++ b/src/lib/mempool.c
@@ -0,0 +1,25 @@
+/* Copyright (c) 2005-2018 Dovecot authors, see the included COPYING file */
+
+#include "lib.h"
+
+/* The various implementations of pools API assume that they'll never be
+   asked for more than SSIZE_T_MAX bytes.  This is a sanity check to make
+   sure nobody accidentally bumped the define beyond what's expected. */
+#if POOL_MAX_ALLOC_SIZE > SSIZE_T_MAX
+#error "POOL_MAX_ALLOC_SIZE is too large"
+#endif
+
+size_t pool_get_exp_grown_size(pool_t pool, size_t old_size, size_t min_size)
+{
+	size_t exp_size, easy_size;
+
+	i_assert(old_size < min_size);
+
+	exp_size = nearest_power(min_size);
+	easy_size = old_size + p_get_max_easy_alloc_size(pool);
+
+	if (easy_size < exp_size && easy_size >= min_size)
+		exp_size = easy_size;
+	i_assert(exp_size >= min_size);
+	return exp_size;
+}