From 55f41f40a14f63b6efab516f2cd7fefe43d9668d Mon Sep 17 00:00:00 2001
From: Leonid Yuriev <leo@yuriev.ru>
Date: Sat, 24 Apr 2021 14:07:15 +0300
Subject: [PATCH] mdbx: rename `log2n_powerof2()`.

Change-Id: I22290630186c5041b6ae242d0db1f5c5f36da4ec
---
 src/core.c      | 6 +++---
 src/internals.h | 3 ++-
 src/osal.c      | 2 +-
 3 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/src/core.c b/src/core.c
index a836afd1..72b727a5 100644
--- a/src/core.c
+++ b/src/core.c
@@ -417,7 +417,7 @@ static __inline size_t valsize_max(size_t pagesize, MDBX_db_flags_t flags) {
   if (flags & (MDBX_DUPSORT | MDBX_DUPFIXED | MDBX_REVERSEDUP))
     return keysize_max(pagesize, 0);
 
-  const unsigned page_ln2 = log2n(pagesize);
+  const unsigned page_ln2 = log2n_powerof2(pagesize);
   const size_t hard = 0x7FF00000ul;
   const size_t hard_pages = hard >> page_ln2;
   STATIC_ASSERT(MDBX_PGL_LIMIT <= MAX_PAGENO);
@@ -10472,7 +10472,7 @@ static void __cold mdbx_setup_pagesize(MDBX_env *env, const size_t pagesize) {
                   leaf_nodemax >= branch_nodemax &&
                   leaf_nodemax < (int)UINT16_MAX && leaf_nodemax % 2 == 0);
   env->me_leaf_nodemax = (unsigned)leaf_nodemax;
-  env->me_psize2log = (uint8_t)log2n(pagesize);
+  env->me_psize2log = (uint8_t)log2n_powerof2(pagesize);
   mdbx_assert(env, pgno2bytes(env, 1) == pagesize);
   mdbx_assert(env, bytes2pgno(env, pagesize + pagesize) == 2);
 
@@ -11646,7 +11646,7 @@ __cold int mdbx_is_readahead_reasonable(size_t volume, intptr_t redundancy) {
   if (unlikely(err != MDBX_SUCCESS))
     return err;
 
-  const int log2page = log2n(pagesize);
+  const int log2page = log2n_powerof2(pagesize);
   const intptr_t volume_pages = (volume + pagesize - 1) >> log2page;
   const intptr_t redundancy_pages =
       (redundancy < 0) ? -(intptr_t)((-redundancy + pagesize - 1) >> log2page)
diff --git a/src/internals.h b/src/internals.h
index 192e9607..33962ec3 100644
--- a/src/internals.h
+++ b/src/internals.h
@@ -1568,7 +1568,8 @@ ceil_powerof2(size_t value, size_t granularity) {
   return floor_powerof2(value + granularity - 1, granularity);
 }
 
-MDBX_NOTHROW_CONST_FUNCTION static __maybe_unused unsigned log2n(size_t value) {
+MDBX_NOTHROW_CONST_FUNCTION static __maybe_unused unsigned
+log2n_powerof2(size_t value) {
   assert(value > 0 && value < INT32_MAX && is_powerof2(value));
   assert((value & -(int32_t)value) == value);
 #if __GNUC_PREREQ(4, 1) || __has_builtin(__builtin_ctzl)
diff --git a/src/osal.c b/src/osal.c
index ac6dba88..0f03b850 100644
--- a/src/osal.c
+++ b/src/osal.c
@@ -2409,7 +2409,7 @@ __cold int mdbx_get_sysraminfo(intptr_t *page_size, intptr_t *total_pages,
   if (unlikely(pagesize < MIN_PAGESIZE || !is_powerof2(pagesize)))
     return MDBX_INCOMPATIBLE;
 
-  __maybe_unused const int log2page = log2n(pagesize);
+  __maybe_unused const int log2page = log2n_powerof2(pagesize);
   assert(pagesize == (INT64_C(1) << log2page));
   (void)log2page;