apr_FOPEN_RANDOM.patch

diff -rupN original/apr-1.5.2/file_io/unix/open.c mine/apr-1.5.2/file_io/unix/open.c
--- original/apr-1.5.2/file_io/unix/open.c	2013-11-02 11:36:02.000000000 +0000
+++ mine/apr-1.5.2/file_io/unix/open.c	2016-08-07 02:46:02.021141363 +0000
@@ -205,6 +205,12 @@ APR_DECLARE(apr_status_t) apr_file_open(
         }
     }
 
+#if defined(POSIX_FADV_RANDOM)
+    if (flag & APR_FOPEN_RANDOM) {
+        posix_fadvise(fd, 0, 0, POSIX_FADV_RANDOM | POSIX_FADV_NOREUSE);
+    }
+#endif
+
     (*new) = (apr_file_t *)apr_pcalloc(pool, sizeof(apr_file_t));
     (*new)->pool = pool;
     (*new)->flags = flag;
diff -rupN original/apr-1.5.2/file_io/win32/open.c mine/apr-1.5.2/file_io/win32/open.c
--- original/apr-1.5.2/file_io/win32/open.c	2014-02-12 19:22:47.000000000 +0000
+++ mine/apr-1.5.2/file_io/win32/open.c	2016-08-07 02:46:18.221038510 +0000
@@ -403,6 +403,19 @@ APR_DECLARE(apr_status_t) apr_file_open(
         attributes |= FILE_FLAG_OVERLAPPED;
     }
 
+    if (flag & APR_FOPEN_RANDOM) {
+        /* Set the RANDOM_ACCESS_FLAG if requested,
+         * except if SENDFILE is also enabled,
+         * in which case SEQUENTIAL_SCAN will be set
+         */
+        if (flag & APR_FOPEN_SEND_FILE_ENABLED) {
+            flag &= ~APR_FOPEN_RANDOM;
+        }
+        else {
+            attributes |= FILE_FLAG_RANDOM_ACCESS;
+        }
+    }
+
 #if APR_HAS_UNICODE_FS
     IF_WIN_OS_IS_UNICODE
     {
diff -rupN original/apr-1.5.2/include/apr_file_io.h mine/apr-1.5.2/include/apr_file_io.h
--- original/apr-1.5.2/include/apr_file_io.h	2013-11-17 20:31:58.000000000 +0000
+++ mine/apr-1.5.2/include/apr_file_io.h	2016-08-07 02:45:38.480918470 +0000
@@ -85,6 +85,9 @@ extern "C" {
 #define APR_FOPEN_SPARSE      0x08000 /**< Platform dependent flag to enable
                                        * sparse file support, see WARNING below
                                        */
+#define APR_FOPEN_RANDOM      0x10000 /**< Platform dependent flag to optimize
+                                       * file for random access
+                                       */
 #define APR_FOPEN_NONBLOCK    0x40000 /**< Platform dependent flag to enable
                                        * non blocking file io */