From c486ea9c3582710474c1085c21c1dc5e2700adc3 Mon Sep 17 00:00:00 2001
From: Behdad Esfahbod <behdad@behdad.org>
Date: Wed, 12 Aug 2009 19:36:29 -0400
Subject: [PATCH] =?UTF-8?q?Bug=20591511=20=E2=80=93=20hb-blob.c=20does=20n?=
 =?UTF-8?q?ot=20compile=20using=20mingw=20on=20windows?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Only call mprotect() when available.  For optimal performance, a win32
way to make memory writeable needs to be added.
---
 src/hb-blob.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/hb-blob.c b/src/hb-blob.c
index 693904957..178bc8e18 100644
--- a/src/hb-blob.c
+++ b/src/hb-blob.c
@@ -28,8 +28,12 @@
 
 #include "hb-blob.h"
 
+#ifdef HAVE_MPROTECT
+#ifdef HAVE_UNISTD_H
 #include <unistd.h>
+#endif /* HAVE_UNISTD_H */
 #include <sys/mman.h>
+#endif /* HAVE_MPROTECT */
 
 struct _hb_blob_t {
   hb_reference_count_t ref_count;
@@ -240,6 +244,7 @@ hb_blob_try_writeable_inplace (hb_blob_t *blob)
 
   hb_mutex_lock (blob->lock);
 
+#ifdef HAVE_MPROTECT
   if (blob->mode == HB_MEMORY_MODE_READONLY_MAY_MAKE_WRITEABLE) {
     unsigned int pagesize, mask, length;
     const char *addr;
@@ -281,6 +286,9 @@ hb_blob_try_writeable_inplace (hb_blob_t *blob)
 	     addr, addr+length, length);
 #endif
   }
+#else /* !HAVE_MPROTECT */
+#warning "No way to make readonly memory writeable.  This is suboptimal."
+#endif
 
 done:
   mode = blob->mode;