(svn r27673) -Add: [Win32] Thread names for windows debuggers.

src/os/windows/win32.cpp

@@ -785,3 +785,36 @@ uint GetCPUCoreCount()
 	GetSystemInfo(&info);
 	return info.dwNumberOfProcessors;
 }
+
+#ifdef _MSC_VER
+/* Code from MSDN: https://msdn.microsoft.com/en-us/library/xcb2z8hs.aspx */
+const DWORD MS_VC_EXCEPTION = 0x406D1388;
+#pragma pack(push,8)
+typedef struct {
+	DWORD dwType;     ///< Must be 0x1000.
+	LPCSTR szName;    ///< Pointer to name (in user addr space).
+	DWORD dwThreadID; ///< Thread ID (-1=caller thread).
+	DWORD dwFlags;    ///< Reserved for future use, must be zero.
+} THREADNAME_INFO;
+#pragma pack(pop)
+
+/**
+ * Signal thread name to any attached debuggers.
+ */
+void SetWin32ThreadName(DWORD dwThreadID, const char* threadName)
+{
+	THREADNAME_INFO info;
+	info.dwType = 0x1000;
+	info.szName = threadName;
+	info.dwThreadID = dwThreadID;
+	info.dwFlags = 0;
+
+#pragma warning(push)
+#pragma warning(disable: 6320 6322)
+	__try {
+		RaiseException(MS_VC_EXCEPTION, 0, sizeof(info) / sizeof(ULONG_PTR), (ULONG_PTR*)&info);
+	} __except (EXCEPTION_EXECUTE_HANDLER) {
+	}
+#pragma warning(pop)
+}
+#endif