From a8513e46050fe0ae47ff543ec84c2f022e439f6a Mon Sep 17 00:00:00 2001
From: Pierre Bourdon <delroth@gmail.com>
Date: Fri, 29 Mar 2013 07:42:41 -0700
Subject: [PATCH] Re-add StdConditionVariable, MSVC 2010 does not support
 <condition_variable>

---
 Source/Core/Common/Common.vcxproj             |   1 +
 Source/Core/Common/Common.vcxproj.filters     |   1 +
 Source/Core/Common/Src/StdConditionVariable.h | 166 ++++++++++++++++++
 Source/Core/Common/Src/Thread.h               |   2 +-
 4 files changed, 169 insertions(+), 1 deletion(-)
 create mode 100644 Source/Core/Common/Src/StdConditionVariable.h

diff --git a/Source/Core/Common/Common.vcxproj b/Source/Core/Common/Common.vcxproj
index 12370296b9..e8e45187b7 100644
--- a/Source/Core/Common/Common.vcxproj
+++ b/Source/Core/Common/Common.vcxproj
@@ -241,6 +241,7 @@
     <ClInclude Include="Src\SDCardUtil.h" />
     <ClInclude Include="Src\Setup.h" />
     <ClInclude Include="Src\stdafx.h" />
+    <ClInclude Include="Src\StdConditionVariable.h" />
     <ClInclude Include="Src\StringUtil.h" />
     <ClInclude Include="Src\SymbolDB.h" />
     <ClInclude Include="Src\SysConf.h" />
diff --git a/Source/Core/Common/Common.vcxproj.filters b/Source/Core/Common/Common.vcxproj.filters
index f8915af9a2..878ead5d27 100644
--- a/Source/Core/Common/Common.vcxproj.filters
+++ b/Source/Core/Common/Common.vcxproj.filters
@@ -85,6 +85,7 @@
     <ClInclude Include="Src\SDCardUtil.h" />
     <ClInclude Include="Src\Setup.h" />
     <ClInclude Include="Src\stdafx.h" />
+    <ClInclude Include="Src\StdConditionVariable.h" />
     <ClInclude Include="Src\StringUtil.h" />
     <ClInclude Include="Src\SymbolDB.h" />
     <ClInclude Include="Src\SysConf.h" />
diff --git a/Source/Core/Common/Src/StdConditionVariable.h b/Source/Core/Common/Src/StdConditionVariable.h
new file mode 100644
index 0000000000..9a045a650b
--- /dev/null
+++ b/Source/Core/Common/Src/StdConditionVariable.h
@@ -0,0 +1,166 @@
+
+#ifndef CONDITION_VARIABLE_H_
+#define CONDITION_VARIABLE_H_
+
+#define GCC_VER(x,y,z)	((x) * 10000 + (y) * 100 + (z))
+#define GCC_VERSION GCC_VER(__GNUC__, __GNUC_MINOR__, __GNUC_PATCHLEVEL__)
+
+#if GCC_VERSION >= GCC_VER(4,4,0) && __GXX_EXPERIMENTAL_CXX0X__ && !ANDROID
+
+// GCC 4.4 provides <condition_variable>
+#include <condition_variable>
+
+#elif defined(__has_include) && __has_include(<condition_variable>)
+
+// clang and libc++ provide <condition_variable> on OSX. However, the version
+// of libc++ bundled with OSX 10.7 and 10.8 is buggy: it uses _ as a variable.
+//
+// We work around this issue by undefining and redefining _.
+
+#undef _
+#include <condition_variable>
+#define _(s) wxGetTranslation((s))
+
+#else
+
+// partial std::condition_variable implementation for win32/pthread
+
+#include <mutex>
+
+#if (_MSC_VER >= 1600) || (GCC_VERSION >= GCC_VER(4,3,0) && __GXX_EXPERIMENTAL_CXX0X__)
+#define USE_RVALUE_REFERENCES
+#endif
+
+#if defined(_WIN32) && defined(_M_X64)
+#define USE_CONDITION_VARIABLES
+#elif defined(_WIN32)
+#define USE_EVENTS
+#endif
+
+namespace std
+{
+
+class condition_variable
+{
+#if defined(_WIN32) && defined(USE_CONDITION_VARIABLES)
+	typedef CONDITION_VARIABLE native_type;
+#elif defined(_WIN32)
+	typedef HANDLE native_type;
+#else
+	typedef pthread_cond_t native_type;
+#endif
+
+public:
+
+#ifdef USE_EVENTS
+	typedef native_type native_handle_type;
+#else
+	typedef native_type* native_handle_type;
+#endif
+
+	condition_variable()
+	{
+#if defined(_WIN32) && defined(USE_CONDITION_VARIABLES)
+		InitializeConditionVariable(&m_handle);
+#elif defined(_WIN32)
+		m_handle = CreateEvent(NULL, false, false, NULL);
+#else
+		pthread_cond_init(&m_handle, NULL);
+#endif
+	}
+
+	~condition_variable()
+	{
+#if defined(_WIN32) && !defined(USE_CONDITION_VARIABLES)
+		CloseHandle(m_handle);
+#elif !defined(_WIN32)
+		pthread_cond_destroy(&m_handle);
+#endif
+	}
+
+	condition_variable(const condition_variable&) /*= delete*/;
+	condition_variable& operator=(const condition_variable&) /*= delete*/;
+
+	void notify_one()
+	{
+#if defined(_WIN32) && defined(USE_CONDITION_VARIABLES)
+		WakeConditionVariable(&m_handle);
+#elif defined(_WIN32)
+		SetEvent(m_handle);
+#else
+		pthread_cond_signal(&m_handle);
+#endif
+	}
+
+	void notify_all()
+	{
+#if defined(_WIN32) && defined(USE_CONDITION_VARIABLES)
+		WakeAllConditionVariable(&m_handle);
+#elif defined(_WIN32)
+		// TODO: broken
+		SetEvent(m_handle);
+#else
+		pthread_cond_broadcast(&m_handle);
+#endif
+	}
+
+	void wait(unique_lock<mutex>& lock)
+	{
+#ifdef _WIN32
+	#ifdef USE_SRWLOCKS
+		SleepConditionVariableSRW(&m_handle, lock.mutex()->native_handle(), INFINITE, 0);
+	#elif defined(USE_CONDITION_VARIABLES)
+		SleepConditionVariableCS(&m_handle, lock.mutex()->native_handle(), INFINITE);
+	#else
+		// TODO: broken, the unlock and wait need to be atomic
+		lock.unlock();
+		WaitForSingleObject(m_handle, INFINITE);
+		lock.lock();
+	#endif
+#else
+		pthread_cond_wait(&m_handle, lock.mutex()->native_handle());
+#endif
+	}
+
+	template <class Predicate>
+	void wait(unique_lock<mutex>& lock, Predicate pred)
+	{
+		while (!pred())
+			wait(lock);
+	}
+
+	//template <class Clock, class Duration>
+	//cv_status wait_until(unique_lock<mutex>& lock,
+	//	const chrono::time_point<Clock, Duration>& abs_time);
+
+	//template <class Clock, class Duration, class Predicate>
+	//	bool wait_until(unique_lock<mutex>& lock,
+	//	const chrono::time_point<Clock, Duration>& abs_time,
+	//	Predicate pred);
+
+	//template <class Rep, class Period>
+	//cv_status wait_for(unique_lock<mutex>& lock,
+	//	const chrono::duration<Rep, Period>& rel_time);
+
+	//template <class Rep, class Period, class Predicate>
+	//	bool wait_for(unique_lock<mutex>& lock,
+	//	const chrono::duration<Rep, Period>& rel_time,
+	//	Predicate pred);
+
+	native_handle_type native_handle()
+	{
+#ifdef USE_EVENTS
+		return m_handle;
+#else
+		return &m_handle;
+#endif
+	}
+
+private:
+	native_type m_handle;
+};
+
+}
+
+#endif
+#endif
diff --git a/Source/Core/Common/Src/Thread.h b/Source/Core/Common/Src/Thread.h
index 5ced2b2b3e..1eb671f223 100644
--- a/Source/Core/Common/Src/Thread.h
+++ b/Source/Core/Common/Src/Thread.h
@@ -22,7 +22,7 @@
 // This conflicts with gettext's use of _ as a macro.
 #undef _
 
-#include <condition_variable>
+#include "StdConditionVariable.h"
 #include <mutex>
 #include <thread>