1 files changed, 42 insertions, 0 deletions
diff --git a/src/lib/mmap-util.h b/src/lib/mmap-util.h
new file mode 100644
index 0000000..0f4184e
--- /dev/null
+++ b/src/lib/mmap-util.h
@@ -0,0 +1,42 @@
+#ifndef MMAP_UTIL_H
+#define MMAP_UTIL_H
+
+#include <unistd.h>
+
+#ifdef HAVE_LINUX_MREMAP
+#  define __USE_GNU /* for MREMAP_MAYMOVE */
+#endif
+
+#include <sys/mman.h>
+#undef __USE_GNU
+
+#if !defined (MREMAP_MAYMOVE) && !defined (HAVE_LINUX_MREMAP)
+#  define MREMAP_MAYMOVE 1
+#endif
+
+#define madvise my_madvise
+int my_madvise(void *start, size_t length, int advice);
+#ifndef HAVE_MADVISE
+#  ifndef MADV_NORMAL
+#    define MADV_NORMAL 0
+#    define MADV_RANDOM 0
+#    define MADV_SEQUENTIAL 0
+#    define MADV_WILLNEED 0
+#    define MADV_DONTNEED 0
+#  endif
+#endif
+
+void *mmap_file(int fd, size_t *length, int prot);
+void *mmap_ro_file(int fd, size_t *length);
+void *mmap_rw_file(int fd, size_t *length);
+
+/* for allocating anonymous mmap()s, with portable mremap(). these must not
+   be mixed with any standard mmap calls. */
+void *mmap_anon(size_t length);
+void *mremap_anon(void *old_address, size_t old_size, size_t new_size,
+		  unsigned long flags);
+int munmap_anon(void *start, size_t length);
+
+size_t mmap_get_page_size(void) ATTR_CONST;
+
+#endif