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-rw-r--r--tools/mingw_support.c79
1 files changed, 79 insertions, 0 deletions
diff --git a/tools/mingw_support.c b/tools/mingw_support.c
new file mode 100644
index 0000000..67cd6e1
--- /dev/null
+++ b/tools/mingw_support.c
@@ -0,0 +1,79 @@
+/*
+ * Copyright 2008 Extreme Engineering Solutions, Inc.
+ *
+ * mmap/munmap implementation derived from:
+ * Clamav Native Windows Port : mmap win32 compatibility layer
+ * Copyright (c) 2005-2006 Gianluigi Tiesi <sherpya@netfarm.it>
+ * Parts by Kees Zeelenberg <kzlg@users.sourceforge.net> (LibGW32C)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this software; if not, write to the
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "mingw_support.h"
+#include <stdio.h>
+#include <stdint.h>
+#include <errno.h>
+#include <io.h>
+
+int fsync(int fd)
+{
+ return _commit(fd);
+}
+
+void *mmap(void *addr, size_t len, int prot, int flags, int fd, int offset)
+{
+ void *map = NULL;
+ HANDLE handle = INVALID_HANDLE_VALUE;
+ DWORD cfm_flags = 0, mvf_flags = 0;
+
+ switch (prot) {
+ case PROT_READ | PROT_WRITE:
+ cfm_flags = PAGE_READWRITE;
+ mvf_flags = FILE_MAP_ALL_ACCESS;
+ break;
+ case PROT_WRITE:
+ cfm_flags = PAGE_READWRITE;
+ mvf_flags = FILE_MAP_WRITE;
+ break;
+ case PROT_READ:
+ cfm_flags = PAGE_READONLY;
+ mvf_flags = FILE_MAP_READ;
+ break;
+ default:
+ return MAP_FAILED;
+ }
+
+ handle = CreateFileMappingA((HANDLE) _get_osfhandle(fd), NULL,
+ cfm_flags, HIDWORD(len), LODWORD(len), NULL);
+ if (!handle)
+ return MAP_FAILED;
+
+ map = MapViewOfFile(handle, mvf_flags, HIDWORD(offset),
+ LODWORD(offset), len);
+ CloseHandle(handle);
+
+ if (!map)
+ return MAP_FAILED;
+
+ return map;
+}
+
+int munmap(void *addr, size_t len)
+{
+ if (!UnmapViewOfFile(addr))
+ return -1;
+
+ return 0;
+}