Merge https://salsa.debian.org/debian/libgit2 into proxmox/bullseye

[libgit2.git] / src / util / map.h

diff --git a/src/util/map.h b/src/util/map.h
new file mode 100644 (file)
index 0000000..c101e46
--- /dev/null
+++ b/src/util/map.h
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+#ifndef INCLUDE_map_h__
+#define INCLUDE_map_h__
+
+#include "git2_util.h"
+
+
+/* p_mmap() prot values */
+#define GIT_PROT_NONE 0x0
+#define GIT_PROT_READ 0x1
+#define GIT_PROT_WRITE 0x2
+#define GIT_PROT_EXEC 0x4
+
+/* git__mmmap() flags values */
+#define GIT_MAP_FILE   0
+#define GIT_MAP_SHARED 1
+#define GIT_MAP_PRIVATE 2
+#define GIT_MAP_TYPE   0xf
+#define GIT_MAP_FIXED  0x10
+
+#ifdef __amigaos4__
+#define MAP_FAILED 0
+#endif
+
+typedef struct { /* memory mapped buffer       */
+       void *data; /* data bytes                       */
+       size_t len; /* data length                      */
+#ifdef GIT_WIN32
+       HANDLE fmh; /* file mapping handle */
+#endif
+} git_map;
+
+#define GIT_MMAP_VALIDATE(out, len, prot, flags) do { \
+       GIT_ASSERT(out != NULL && len > 0); \
+       GIT_ASSERT((prot & GIT_PROT_WRITE) || (prot & GIT_PROT_READ)); \
+       GIT_ASSERT((flags & GIT_MAP_FIXED) == 0); } while (0)
+
+extern int p_mmap(git_map *out, size_t len, int prot, int flags, int fd, off64_t offset);
+extern int p_munmap(git_map *map);
+
+#endif