From: Timo Sirainen <timo.sirainen@dovecot.fi>
Date: Fri, 29 Apr 2016 09:54:46 +0000 (+0300)
Subject: lib: Implement i_realloc(mem==NULL) more efficiently
X-Git-Tag: 2.3.0.rc1~3914
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=7311925c65813a1902e41eb5aa397ee5b839d39e;p=thirdparty%2Fdovecot%2Fcore.git

lib: Implement i_realloc(mem==NULL) more efficiently

Various parts of code use this to allocate the initial buffer. We can
do this more efficiently by using calloc().
---

diff --git a/src/lib/mempool-system.c b/src/lib/mempool-system.c
index ab83e22310..2cc5d3ae6f 100644
--- a/src/lib/mempool-system.c
+++ b/src/lib/mempool-system.c
@@ -119,6 +119,10 @@ static void *pool_system_realloc(pool_t pool ATTR_UNUSED, void *mem,
 	if (unlikely(new_size == 0 || new_size > SSIZE_T_MAX))
 		i_panic("Trying to allocate %"PRIuSIZE_T" bytes", new_size);
 
+	if (mem == NULL) {
+		i_assert(old_size == 0);
+		return pool_system_malloc(pool, new_size);
+	}
 #if !defined(USE_GC) && defined(HAVE_MALLOC_USABLE_SIZE)
 	i_assert(old_size == (size_t)-1 || mem == NULL ||
 		 old_size <= malloc_usable_size(mem));