From 85a426dc8678f04a78ffd799943b690ce2984c49 Mon Sep 17 00:00:00 2001
From: "U.Nakamura" <usa@ruby-lang.org>
Date: Mon, 27 Dec 2021 15:56:23 +0900
Subject: Tiny mmap emulation for Windows

- prerequisite of supporting YJIT with VC++.
- note that now can specfily `--yjit` on mswin64, but not enabled
  YJIT'ed code because of YJIT requires `OPT_DIRECT_THREADED_CODE`
  or `OPT_CALL_THREADED_CODE` in `rb_yjit_compile_iseq`.
---
 include/ruby/win32.h | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

(limited to 'include/ruby')

diff --git a/include/ruby/win32.h b/include/ruby/win32.h
index c8ae599f2f..287ac34270 100644
--- a/include/ruby/win32.h
+++ b/include/ruby/win32.h
@@ -796,6 +796,25 @@ double rb_w32_pow(double x, double y);
 #define pow rb_w32_pow
 #endif
 
+// mmap tiny emulation
+#define MAP_FAILED	((void *)-1)
+
+#define PROT_READ	0x01
+#define PROT_WRITE	0x02
+#define PROT_EXEC	0x04
+
+#define MAP_PRIVATE	0x0002
+#define MAP_ANON	0x1000
+#define MAP_ANONYMOUS	MAP_ANON
+
+extern void *rb_w32_mmap(void *, size_t, int, int, int, off_t);
+extern int rb_w32_munmap(void *, size_t);
+extern int rb_w32_mprotect(void *, size_t, int);
+
+#define mmap(a, l, p, f, d, o) rb_w32_mmap(a, l, p, f, d, o)
+#define munmap(a, l) rb_w32_munmap(a. l)
+#define mprotect(a, l, p) 0
+
 #if defined(__cplusplus)
 #if 0
 { /* satisfy cc-mode */
-- 
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