commit a15604060010069bd16268306c0c1a1be144b771
author Alexei Podtelezhnikov <apodtele@gmail.com> Tue Oct 05 14:19:06 2021 -0400
committer Alexei Podtelezhnikov <apodtele@gmail.com> Tue Oct 05 14:19:06 2021 -0400
tree 2a0809b1318d85c79fa7d47fd7650953c520aaff
parent 467e49e817336bf3b890cb0e7fe984a5cae2e5e7

[builds/unix, builds/vms] Standardize `mmap` failure.

* builds/unix/ftsystem.c (FT_Stream_Open): Check for MAP_FAILED.
* builds/vms/ftsystem.c (FT_Stream_Open): Ditto.

This should cover https://savannah.nongnu.org/patch/?5909 as well.

builds/unix/ftsystem.c

diff --git a/builds/unix/ftsystem.c b/builds/unix/ftsystem.c
index 7fc9941..81ed928 100644
--- a/builds/unix/ftsystem.c
+++ b/builds/unix/ftsystem.c
@@ -313,8 +313,7 @@
                                           file,
                                           0 );
 
-    /* on some RTOS, mmap might return 0 */
-    if ( (long)stream->base != -1 && stream->base != NULL )
+    if ( stream->base != MAP_FAILED )
       stream->close = ft_close_stream_by_munmap;
     else
     {

builds/vms/ftsystem.c

diff --git a/builds/vms/ftsystem.c b/builds/vms/ftsystem.c
index 7e56873..31b0870 100644
--- a/builds/vms/ftsystem.c
+++ b/builds/vms/ftsystem.c
@@ -246,7 +246,7 @@
                                           file,
                                           0 );
 
-    if ( (long)stream->base == -1 )
+    if ( stream->base == MAP_FAILED )
     {
       FT_ERROR(( "FT_Stream_Open:" ));
       FT_ERROR(( " could not `mmap' file `%s'\n", filepathname ));