From f9859ad4116733e145d7b8eb31c3cc9318ff7564 Mon Sep 17 00:00:00 2001
From: "graehl@gmail.com"
 <graehl@gmail.com@ec762483-ff6d-05da-a07a-a48fb63a330f>
Date: Mon, 2 Aug 2010 07:57:23 +0000
Subject: fake tdict names for non-ids, push viterbi cost to root in hg, store
 as feature.  type erased fsa feature via virtual interface.  made
 lexical_cast assume C locale for speed.

git-svn-id: https://ws10smt.googlecode.com/svn/trunk@465 ec762483-ff6d-05da-a07a-a48fb63a330f
---
 decoder/threadlocal.h | 71 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 71 insertions(+)
 create mode 100755 decoder/threadlocal.h

(limited to 'decoder/threadlocal.h')

diff --git a/decoder/threadlocal.h b/decoder/threadlocal.h
new file mode 100755
index 00000000..d79f5d9d
--- /dev/null
+++ b/decoder/threadlocal.h
@@ -0,0 +1,71 @@
+#ifndef THREADLOCAL_H
+#define THREADLOCAL_H
+
+#ifndef SETLOCAL_SWAP
+# define SETLOCAL_SWAP 0
+#endif
+
+#ifdef BOOST_NO_MT
+
+# define THREADLOCAL
+
+#else
+
+#ifdef _MSC_VER
+
+//FIXME: doesn't work with DLLs ... use TLS apis instead (http://www.boost.org/libs/thread/doc/tss.html)
+# define THREADLOCAL __declspec(thread)
+
+#else
+
+# define THREADLOCAL __thread
+
+#endif
+
+#endif
+
+#include <algorithm> //swap
+
+// naturally, the below are only thread-safe if value is THREADLOCAL
+template <class D>
+struct SaveLocal {
+    D &value;
+    D old_value;
+    SaveLocal(D& val) : value(val), old_value(val) {}
+    ~SaveLocal() {
+#if SETLOCAL_SWAP
+      swap(value,old_value);
+#else
+      value=old_value;
+#endif
+    }
+};
+
+template <class D>
+struct SetLocal {
+    D &value;
+    D old_value;
+    SetLocal(D& val,const D &new_value) : value(val), old_value(
+#if SETLOCAL_SWAP
+      new_value
+#else
+      val
+#endif
+      ) {
+#if SETLOCAL_SWAP
+      swap(value,old_value);
+#else
+      value=new_value;
+#endif
+    }
+    ~SetLocal() {
+#if SETLOCAL_SWAP
+      swap(value,old_value);
+#else
+      value=old_value;
+#endif
+    }
+};
+
+
+#endif
-- 
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