From 93b7bd56079f0cc7cf35b2c457d583fa622f87c8 Mon Sep 17 00:00:00 2001
From: John Hodge <tpg@mutabah.net>
Date: Sat, 21 May 2016 11:55:54 +0800
Subject: Expand/cfg - Add 'target_has_atomic'

---
 src/expand/cfg.cpp | 2 +-
 src/expand/cfg.hpp | 1 +
 src/main.cpp       | 5 +++++
 3 files changed, 7 insertions(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/expand/cfg.cpp b/src/expand/cfg.cpp
index 76f6bbc3..1372d982 100644
--- a/src/expand/cfg.cpp
+++ b/src/expand/cfg.cpp
@@ -18,7 +18,7 @@ void Cfg_SetFlag(::std::string name) {
 void Cfg_SetValue(::std::string name, ::std::string val) {
     g_cfg_values.insert( ::std::make_pair(mv$(name), mv$(val)) );
 }
-void Cfg_SetValue(::std::string name, ::std::function<bool(const ::std::string&)> cb) {
+void Cfg_SetValueCb(::std::string name, ::std::function<bool(const ::std::string&)> cb) {
     g_cfg_value_fcns.insert( ::std::make_pair(mv$(name), mv$(cb)) );
 }
 
diff --git a/src/expand/cfg.hpp b/src/expand/cfg.hpp
index ae5e1054..8e5fce42 100644
--- a/src/expand/cfg.hpp
+++ b/src/expand/cfg.hpp
@@ -3,4 +3,5 @@
 
 extern void Cfg_SetFlag(::std::string name);
 extern void Cfg_SetValue(::std::string name, ::std::string val);
+extern void Cfg_SetValueCb(::std::string name, ::std::function<bool(const ::std::string&)> cb);
 extern bool check_cfg(Span sp, const ::AST::MetaItem& mi);
diff --git a/src/main.cpp b/src/main.cpp
index 4338487c..fd6cd692 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -77,6 +77,11 @@ int main(int argc, char *argv[])
     // Set up cfg values
     Cfg_SetFlag("linux");
     Cfg_SetValue("target_pointer_width", "64");
+    Cfg_SetValueCb("target_has_atomic", [](const ::std::string& s) {
+        if(s == "8")    return true;    // Has an atomic byte
+        if(s == "ptr")  return true;    // Has an atomic pointer-sized value
+        return false;
+        });
     
     
     try
-- 
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