From 344bacab7cbc75a5f6ea2eb884e94968666128dc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Branimir=20Karad=C5=BEi=C4=87?= <branimirkaradzic@gmail.com>
Date: Sun, 13 Sep 2015 13:24:14 -0700
Subject: [PATCH] Added workaround for compilers/platforms that don't support
 TLS specifier.

---
 .gitignore   | 13 +++++++------
 src/bgfx.cpp | 47 +++++++++++++++++++++++++++++++++++++++++++++--
 2 files changed, 52 insertions(+), 8 deletions(-)

diff --git a/.gitignore b/.gitignore
index 43c5713f..3f3804ea 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,7 @@
-.build
-.debug
-.DS_Store
-.git
-.svn
-tags
+.build
+.debug
+.DS_Store
+.git
+.svn
+tags
+.gdb_history
diff --git a/src/bgfx.cpp b/src/bgfx.cpp
index 68dba688..d66826f4 100644
--- a/src/bgfx.cpp
+++ b/src/bgfx.cpp
@@ -9,7 +9,7 @@ namespace bgfx
 {
 #define BGFX_MAIN_THREAD_MAGIC UINT32_C(0x78666762)
 
-#if BGFX_CONFIG_MULTITHREADED && !BX_PLATFORM_OSX && !BX_PLATFORM_IOS
+#if BGFX_CONFIG_MULTITHREADED
 #	define BGFX_CHECK_MAIN_THREAD() \
 				BX_CHECK(NULL != s_ctx, "Library is not initialized yet."); \
 				BX_CHECK(BGFX_MAIN_THREAD_MAGIC == s_threadIndex, "Must be called from main thread.")
@@ -200,7 +200,50 @@ namespace bgfx
 
 	Caps g_caps;
 
-	static BX_THREAD uint32_t s_threadIndex = 0;
+#if !defined(BX_THREAD_LOCAL)
+	class ThreadData
+	{
+		BX_CLASS(ThreadData
+			, NO_COPY
+			, NO_ASSIGNMENT
+			);
+
+	public:
+		ThreadData(uintptr_t _rhs)
+		{
+			union { uintptr_t ui; void* ptr; } cast = { _rhs };
+			m_tls.set(cast.ptr);
+		}
+
+		operator uintptr_t() const
+		{
+			union { uintptr_t ui; void* ptr; } cast;
+			cast.ptr = m_tls.get();
+			return cast.ui;
+		}
+
+		uintptr_t operator=(uintptr_t _rhs)
+		{
+			union { uintptr_t ui; void* ptr; } cast = { _rhs };
+			m_tls.set(cast.ptr);
+			return _rhs;
+		}
+
+		bool operator==(uintptr_t _rhs)
+		{
+			uintptr_t lhs = *this;
+			return lhs == _rhs;
+		}
+
+	private:
+		bx::TlsData m_tls;
+	};
+
+	static ThreadData s_threadIndex(0);
+#else
+	static BX_THREAD_LOCAL uint32_t s_threadIndex(0);
+#endif
+
 	static Context* s_ctx = NULL;
 	static bool s_renderFrameCalled = false;
 	PlatformData g_platformData;