From 4008e5e58337feb8a5ab29b7f939b1831d3f6d75 Mon Sep 17 00:00:00 2001
From: Howard Chu <hyc@symas.com>
Date: Sun, 17 Aug 2014 20:44:53 -0700
Subject: [PATCH] Partially revert ada26306992babeccad0c5443fbd76e28dd24cd6

Of course, MacOSX only has posix_memalign, and only in recent versions.
(Older versions could use valloc instead. That precludes ever changing
the LMDB pagesize to be different from the OS pagesize.) Not all that
crucial since it only affects mdb_env_copyfd1.
---
 libraries/liblmdb/mdb.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/libraries/liblmdb/mdb.c b/libraries/liblmdb/mdb.c
index 6afd615..74d3678 100644
--- a/libraries/liblmdb/mdb.c
+++ b/libraries/liblmdb/mdb.c
@@ -79,17 +79,23 @@ extern int cacheflush(char *addr, int nbytes, int cache);
 #define CACHEFLUSH(addr, bytes, cache)
 #endif
 
+
 #include <errno.h>
 #include <limits.h>
 #include <stddef.h>
 #include <inttypes.h>
 #include <stdio.h>
 #include <stdlib.h>
-#include <malloc.h>
 #include <string.h>
 #include <time.h>
 #include <unistd.h>
 
+#if defined(__sun)
+/* Most platforms have posix_memalign, older may only have memalign */
+#define HAVE_MEMALIGN	1
+#include <malloc.h>
+#endif
+
 #if !(defined(BYTE_ORDER) || defined(__BYTE_ORDER))
 #include <netinet/in.h>
 #include <resolv.h>	/* defines BYTE_ORDER on HPUX and Solaris */
@@ -8480,9 +8486,15 @@ mdb_env_copyfd1(MDB_env *env, HANDLE fd)
 #else
 	pthread_mutex_init(&my.mc_mutex, NULL);
 	pthread_cond_init(&my.mc_cond, NULL);
+#ifdef HAVE_MEMALIGN
 	my.mc_wbuf[0] = memalign(env->me_os_psize, MDB_WBUF*2);
 	if (my.mc_wbuf[0] == NULL)
 		return errno;
+#else
+	rc = posix_memalign((void **)&my.mc_wbuf[0], env->me_os_psize, MDB_WBUF*2);
+	if (rc)
+		return rc;
+#endif
 #endif
 	memset(my.mc_wbuf[0], 0, MDB_WBUF*2);
 	my.mc_wbuf[1] = my.mc_wbuf[0] + MDB_WBUF;