Initial version.

src/nxt_mem_map.h

@@ -0,0 +1,65 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ * Copyright (C) NGINX, Inc.
+ */
+
+#ifndef _NXT_UNIX_MEM_MAP_H_INCLUDED_
+#define _NXT_UNIX_MEM_MAP_H_INCLUDED_
+
+
+#define NXT_MEM_MAP_FAILED    MAP_FAILED
+
+
+#define NXT_MEM_MAP_READ      PROT_READ
+#define NXT_MEM_MAP_WRITE     PROT_WRITE
+
+
+#if (NXT_HAVE_MAP_ANONYMOUS)
+#define NXT_MEM_MAP_ANON      MAP_ANONYMOUS
+#else
+#define NXT_MEM_MAP_ANON      MAP_ANON
+#endif
+
+#define NXT_MEM_MAP_SHARED    (MAP_SHARED | NXT_MEM_MAP_ANON)
+
+
+#if (NXT_HAVE_MAP_POPULATE)
+/*
+ * Linux MAP_POPULATE reads ahead and wires pages.
+ * (MAP_POPULATE | MAP_NONBLOCK) wires only resident pages
+ * without read ahead but it does not work since Linux 2.6.23.
+ */
+#define NXT_MEM_MAP_PREFAULT  MAP_POPULATE
+
+#elif (NXT_HAVE_MAP_PREFAULT_READ)
+/* FreeBSD MAP_PREFAULT_READ wires resident pages without read ahead. */
+#define NXT_MEM_MAP_PREFAULT  MAP_PREFAULT_READ
+
+#else
+#define NXT_MEM_MAP_PREFAULT  0
+#endif
+
+#define NXT_MEM_MAP_FILE      (MAP_SHARED | NXT_MEM_MAP_PREFAULT)
+
+
+#define                                                                       \
+    nxt_mem_map_file_ctx_t(ctx)
+
+
+#define                                                                       \
+nxt_mem_map(addr, ctx, len, protection, flags, fd, offset)                    \
+    nxt_mem_mmap(addr, len, protection, flags, fd, offset)
+
+
+#define                                                                       \
+nxt_mem_unmap(addr, ctx, len)                                                 \
+    nxt_mem_munmap(addr, len)
+
+
+NXT_EXPORT void *nxt_mem_mmap(void *addr, size_t len, nxt_uint_t protection,
+    nxt_uint_t flags, nxt_fd_t fd, nxt_off_t offset);
+NXT_EXPORT void nxt_mem_munmap(void *addr, size_t len);
+
+
+#endif /* _NXT_UNIX_MEM_MAP_H_INCLUDED_ */