diff --git a/src/Common/MutexLock.hpp b/src/Common/MutexLock.hpp
index 3a071c9..65e9fa4 100644
--- a/src/Common/MutexLock.hpp
+++ b/src/Common/MutexLock.hpp
@@ -177,18 +177,23 @@
 class LockGuard
 {
 public:
-	explicit LockGuard(sw::MutexLock &mutex) : mutex(mutex)
+	explicit LockGuard(sw::MutexLock &mutex) : mutex(&mutex)
 	{
 		mutex.lock();
 	}
 
+	explicit LockGuard(sw::MutexLock *mutex) : mutex(mutex)
+	{
+		if (mutex) mutex->lock();
+	}
+
 	~LockGuard()
 	{
-		mutex.unlock();
+		if (mutex) mutex->unlock();
 	}
 
 protected:
-	sw::MutexLock &mutex;
+	sw::MutexLock *mutex;
 };
 
 #endif   // sw_MutexLock_hpp
diff --git a/src/OpenGL/libEGL/Display.cpp b/src/OpenGL/libEGL/Display.cpp
index 8bbed9e..8e8b9d3 100644
--- a/src/OpenGL/libEGL/Display.cpp
+++ b/src/OpenGL/libEGL/Display.cpp
@@ -598,7 +598,6 @@
 EGLSyncKHR Display::createSync(Context *context)
 {
 	FenceSync *fenceSync = new egl::FenceSync(context);
-	LockGuard lock(mSyncSetMutex);
 	mSyncSet.insert(fenceSync);
 	return fenceSync;
 }
@@ -635,7 +634,6 @@
 void Display::destroySync(FenceSync *sync)
 {
 	{
-		LockGuard lock(mSyncSetMutex);
 		mSyncSet.erase(sync);
 	}
 	delete sync;
@@ -717,7 +715,6 @@
 
 bool Display::isValidSync(FenceSync *sync)
 {
-	LockGuard lock(mSyncSetMutex);
 	return mSyncSet.find(sync) != mSyncSet.end();
 }
 
diff --git a/src/OpenGL/libEGL/Display.h b/src/OpenGL/libEGL/Display.h
index ddef14a..53ebdfb 100644
--- a/src/OpenGL/libEGL/Display.h
+++ b/src/OpenGL/libEGL/Display.h
@@ -86,6 +86,8 @@
 		bool destroySharedImage(EGLImageKHR);
 		virtual Image *getSharedImage(EGLImageKHR name) = 0;
 
+		sw::MutexLock *getLock() { return &mApiMutex; }
+
 	private:
 		sw::Format getDisplayFormat() const;
 
@@ -104,10 +106,10 @@
 		ContextSet mContextSet;
 
 		typedef std::set<FenceSync*> SyncSet;
-		sw::MutexLock mSyncSetMutex;
 		SyncSet mSyncSet;
 
 		gl::NameSpace<Image> mSharedImageNameSpace;
+		sw::MutexLock mApiMutex;
 	};
 }
 
diff --git a/src/OpenGL/libEGL/main.cpp b/src/OpenGL/libEGL/main.cpp
index c6c5630..0ef957c 100644
--- a/src/OpenGL/libEGL/main.cpp
+++ b/src/OpenGL/libEGL/main.cpp
@@ -19,6 +19,7 @@
 #include "libEGL.hpp"
 #include "Context.hpp"
 #include "Surface.hpp"
+#include "Display.h"
 
 #include "resource.h"
 #include "Common/Thread.hpp"
@@ -330,6 +331,13 @@
 		}
 	}
 }
+
+sw::MutexLock *getDisplayLock(EGLDisplay dpy)
+{
+	auto display = Display::get(dpy);
+	if (!display) return nullptr;
+	return display->getLock();
+}
 }
 
 namespace egl
@@ -399,56 +407,67 @@
 
 EGLAPI EGLBoolean EGLAPIENTRY eglInitialize(EGLDisplay dpy, EGLint *major, EGLint *minor)
 {
+	LockGuard lock(egl::getDisplayLock(dpy));
 	return egl::Initialize(dpy, major, minor);
 }
 
 EGLAPI EGLBoolean EGLAPIENTRY eglTerminate(EGLDisplay dpy)
 {
+	LockGuard lock(egl::getDisplayLock(dpy));
 	return egl::Terminate(dpy);
 }
 
 EGLAPI const char *EGLAPIENTRY eglQueryString(EGLDisplay dpy, EGLint name)
 {
+	LockGuard lock(egl::getDisplayLock(dpy));
 	return egl::QueryString(dpy, name);
 }
 
 EGLAPI EGLBoolean EGLAPIENTRY eglGetConfigs(EGLDisplay dpy, EGLConfig *configs, EGLint config_size, EGLint *num_config)
 {
+	LockGuard lock(egl::getDisplayLock(dpy));
 	return egl::GetConfigs(dpy, configs, config_size, num_config);
 }
 
 EGLAPI EGLBoolean EGLAPIENTRY eglChooseConfig(EGLDisplay dpy, const EGLint *attrib_list, EGLConfig *configs, EGLint config_size, EGLint *num_config)
 {
+	LockGuard lock(egl::getDisplayLock(dpy));
 	return egl::ChooseConfig(dpy, attrib_list, configs, config_size, num_config);
 }
 
 EGLAPI EGLBoolean EGLAPIENTRY eglGetConfigAttrib(EGLDisplay dpy, EGLConfig config, EGLint attribute, EGLint *value)
 {
+	LockGuard lock(egl::getDisplayLock(dpy));
 	return egl::GetConfigAttrib(dpy, config, attribute, value);
 }
 
 EGLAPI EGLSurface EGLAPIENTRY eglCreateWindowSurface(EGLDisplay dpy, EGLConfig config, EGLNativeWindowType window, const EGLint *attrib_list)
 {
+	LockGuard lock(egl::getDisplayLock(dpy));
 	return egl::CreateWindowSurface(dpy, config, window, attrib_list);
 }
 
 EGLAPI EGLSurface EGLAPIENTRY eglCreatePbufferSurface(EGLDisplay dpy, EGLConfig config, const EGLint *attrib_list)
 {
+	LockGuard lock(egl::getDisplayLock(dpy));
 	return egl::CreatePbufferSurface(dpy, config, attrib_list);
 }
 
 EGLAPI EGLSurface EGLAPIENTRY eglCreatePixmapSurface(EGLDisplay dpy, EGLConfig config, EGLNativePixmapType pixmap, const EGLint *attrib_list)
 {
+	LockGuard lock(egl::getDisplayLock(dpy));
 	return egl::CreatePixmapSurface(dpy, config, pixmap, attrib_list);
 }
 
 EGLAPI EGLBoolean EGLAPIENTRY eglDestroySurface(EGLDisplay dpy, EGLSurface surface)
 {
+	LockGuard lock(egl::getDisplayLock(dpy));
 	return egl::DestroySurface(dpy, surface);
 }
 
 EGLAPI EGLBoolean EGLAPIENTRY eglQuerySurface(EGLDisplay dpy, EGLSurface surface, EGLint attribute, EGLint *value)
 {
+	LockGuard lock(egl::getDisplayLock(dpy));
 	return egl::QuerySurface(dpy, surface, attribute, value);
 }
 
@@ -474,41 +493,49 @@
 
 EGLAPI EGLSurface EGLAPIENTRY eglCreatePbufferFromClientBuffer(EGLDisplay dpy, EGLenum buftype, EGLClientBuffer buffer, EGLConfig config, const EGLint *attrib_list)
 {
+	LockGuard lock(egl::getDisplayLock(dpy));
 	return egl::CreatePbufferFromClientBuffer(dpy, buftype, buffer, config, attrib_list);
 }
 
 EGLAPI EGLBoolean EGLAPIENTRY eglSurfaceAttrib(EGLDisplay dpy, EGLSurface surface, EGLint attribute, EGLint value)
 {
+	LockGuard lock(egl::getDisplayLock(dpy));
 	return egl::SurfaceAttrib(dpy, surface, attribute, value);
 }
 
 EGLAPI EGLBoolean EGLAPIENTRY eglBindTexImage(EGLDisplay dpy, EGLSurface surface, EGLint buffer)
 {
+	LockGuard lock(egl::getDisplayLock(dpy));
 	return egl::BindTexImage(dpy, surface, buffer);
 }
 
 EGLAPI EGLBoolean EGLAPIENTRY eglReleaseTexImage(EGLDisplay dpy, EGLSurface surface, EGLint buffer)
 {
+	LockGuard lock(egl::getDisplayLock(dpy));
 	return egl::ReleaseTexImage(dpy, surface, buffer);
 }
 
 EGLAPI EGLBoolean EGLAPIENTRY eglSwapInterval(EGLDisplay dpy, EGLint interval)
 {
+	LockGuard lock(egl::getDisplayLock(dpy));
 	return egl::SwapInterval(dpy, interval);
 }
 
 EGLAPI EGLContext EGLAPIENTRY eglCreateContext(EGLDisplay dpy, EGLConfig config, EGLContext share_context, const EGLint *attrib_list)
 {
+	LockGuard lock(egl::getDisplayLock(dpy));
 	return egl::CreateContext(dpy, config, share_context, attrib_list);
 }
 
 EGLAPI EGLBoolean EGLAPIENTRY eglDestroyContext(EGLDisplay dpy, EGLContext ctx)
 {
+	LockGuard lock(egl::getDisplayLock(dpy));
 	return egl::DestroyContext(dpy, ctx);
 }
 
 EGLAPI EGLBoolean EGLAPIENTRY eglMakeCurrent(EGLDisplay dpy, EGLSurface draw, EGLSurface read, EGLContext ctx)
 {
+	LockGuard lock(egl::getDisplayLock(dpy));
 	return egl::MakeCurrent(dpy, draw, read, ctx);
 }
 
@@ -529,6 +556,7 @@
 
 EGLAPI EGLBoolean EGLAPIENTRY eglQueryContext(EGLDisplay dpy, EGLContext ctx, EGLint attribute, EGLint *value)
 {
+	LockGuard lock(egl::getDisplayLock(dpy));
 	return egl::QueryContext(dpy, ctx, attribute, value);
 }
 
@@ -544,31 +572,37 @@
 
 EGLAPI EGLBoolean EGLAPIENTRY eglSwapBuffers(EGLDisplay dpy, EGLSurface surface)
 {
+	LockGuard lock(egl::getDisplayLock(dpy));
 	return egl::SwapBuffers(dpy, surface);
 }
 
 EGLAPI EGLBoolean EGLAPIENTRY eglCopyBuffers(EGLDisplay dpy, EGLSurface surface, EGLNativePixmapType target)
 {
+	LockGuard lock(egl::getDisplayLock(dpy));
 	return egl::CopyBuffers(dpy, surface, target);
 }
 
 EGLAPI EGLImageKHR EGLAPIENTRY eglCreateImageKHR(EGLDisplay dpy, EGLContext ctx, EGLenum target, EGLClientBuffer buffer, const EGLint *attrib_list)
 {
+	LockGuard lock(egl::getDisplayLock(dpy));
 	return egl::CreateImageKHR(dpy, ctx, target, buffer, attrib_list);
 }
 
 EGLAPI EGLImageKHR EGLAPIENTRY eglCreateImage(EGLDisplay dpy, EGLContext ctx, EGLenum target, EGLClientBuffer buffer, const EGLAttrib *attrib_list)
 {
+	LockGuard lock(egl::getDisplayLock(dpy));
 	return egl::CreateImage(dpy, ctx, target, buffer, attrib_list);
 }
 
 EGLAPI EGLBoolean EGLAPIENTRY eglDestroyImageKHR(EGLDisplay dpy, EGLImageKHR image)
 {
+	LockGuard lock(egl::getDisplayLock(dpy));
 	return egl::DestroyImageKHR(dpy, image);
 }
 
 EGLAPI EGLBoolean EGLAPIENTRY eglDestroyImage(EGLDisplay dpy, EGLImageKHR image)
 {
+	LockGuard lock(egl::getDisplayLock(dpy));
 	return egl::DestroyImageKHR(dpy, image);
 }
 
@@ -584,71 +618,85 @@
 
 EGLAPI EGLSurface EGLAPIENTRY eglCreatePlatformWindowSurfaceEXT(EGLDisplay dpy, EGLConfig config, void *native_window, const EGLint *attrib_list)
 {
+	LockGuard lock(egl::getDisplayLock(dpy));
 	return egl::CreatePlatformWindowSurfaceEXT(dpy, config, native_window, attrib_list);
 }
 
 EGLAPI EGLSurface EGLAPIENTRY eglCreatePlatformWindowSurface(EGLDisplay dpy, EGLConfig config, void *native_window, const EGLAttrib *attrib_list)
 {
+	LockGuard lock(egl::getDisplayLock(dpy));
 	return egl::CreatePlatformWindowSurface(dpy, config, native_window, attrib_list);
 }
 
 EGLAPI EGLSurface EGLAPIENTRY eglCreatePlatformPixmapSurfaceEXT(EGLDisplay dpy, EGLConfig config, void *native_pixmap, const EGLint *attrib_list)
 {
+	LockGuard lock(egl::getDisplayLock(dpy));
 	return egl::CreatePlatformPixmapSurfaceEXT(dpy, config, native_pixmap, attrib_list);
 }
 
 EGLAPI EGLSurface EGLAPIENTRY eglCreatePlatformPixmapSurface(EGLDisplay dpy, EGLConfig config, void *native_pixmap, const EGLAttrib *attrib_list)
 {
+	LockGuard lock(egl::getDisplayLock(dpy));
 	return egl::CreatePlatformPixmapSurface(dpy, config, native_pixmap, attrib_list);
 }
 
 EGLAPI EGLSyncKHR EGLAPIENTRY eglCreateSyncKHR(EGLDisplay dpy, EGLenum type, const EGLint *attrib_list)
 {
+	LockGuard lock(egl::getDisplayLock(dpy));
 	return egl::CreateSyncKHR(dpy, type, attrib_list);
 }
 
 EGLAPI EGLSyncKHR EGLAPIENTRY eglCreateSync(EGLDisplay dpy, EGLenum type, const EGLAttrib *attrib_list)
 {
+	LockGuard lock(egl::getDisplayLock(dpy));
 	return egl::CreateSync(dpy, type, attrib_list);
 }
 
 EGLAPI EGLBoolean EGLAPIENTRY eglDestroySyncKHR(EGLDisplay dpy, EGLSyncKHR sync)
 {
+	LockGuard lock(egl::getDisplayLock(dpy));
 	return egl::DestroySyncKHR(dpy, sync);
 }
 
 EGLAPI EGLBoolean EGLAPIENTRY eglDestroySync(EGLDisplay dpy, EGLSyncKHR sync)
 {
+	LockGuard lock(egl::getDisplayLock(dpy));
 	return egl::DestroySyncKHR(dpy, sync);
 }
 
 EGLAPI EGLint EGLAPIENTRY eglClientWaitSyncKHR(EGLDisplay dpy, EGLSyncKHR sync, EGLint flags, EGLTimeKHR timeout)
 {
+	LockGuard lock(egl::getDisplayLock(dpy));
 	return egl::ClientWaitSyncKHR(dpy, sync, flags, timeout);
 }
 
 EGLAPI EGLint EGLAPIENTRY eglClientWaitSync(EGLDisplay dpy, EGLSyncKHR sync, EGLint flags, EGLTimeKHR timeout)
 {
+	LockGuard lock(egl::getDisplayLock(dpy));
 	return egl::ClientWaitSyncKHR(dpy, sync, flags, timeout);
 }
 
 EGLAPI EGLBoolean EGLAPIENTRY eglGetSyncAttribKHR(EGLDisplay dpy, EGLSyncKHR sync, EGLint attribute, EGLint *value)
 {
+	LockGuard lock(egl::getDisplayLock(dpy));
 	return egl::GetSyncAttribKHR(dpy, sync, attribute, value);
 }
 
 EGLAPI EGLBoolean EGLAPIENTRY eglGetSyncAttrib(EGLDisplay dpy, EGLSyncKHR sync, EGLint attribute, EGLAttrib *value)
 {
+	LockGuard lock(egl::getDisplayLock(dpy));
 	return egl::GetSyncAttrib(dpy, sync, attribute, value);
 }
 
 EGLAPI EGLint EGLAPIENTRY eglWaitSyncKHR(EGLDisplay dpy, EGLSyncKHR sync, EGLint flags)
 {
+	LockGuard lock(egl::getDisplayLock(dpy));
 	return egl::ClientWaitSyncKHR(dpy, sync, flags, EGL_FOREVER_KHR);
 }
 
 EGLAPI EGLBoolean EGLAPIENTRY eglWaitSync(EGLDisplay dpy, EGLSync sync, EGLint flags)
 {
+	LockGuard lock(egl::getDisplayLock(dpy));
 	return egl::ClientWaitSyncKHR(dpy, sync, flags, EGL_FOREVER_KHR);
 }
 
diff --git a/src/OpenGL/libGLESv2/Context.h b/src/OpenGL/libGLESv2/Context.h
index 866982b..5e3449f 100644
--- a/src/OpenGL/libGLESv2/Context.h
+++ b/src/OpenGL/libGLESv2/Context.h
@@ -776,13 +776,18 @@
 public:
 	explicit ContextPtr(Context *context) : ptr(context)
 	{
-		if (ptr) ptr->getResourceLock()->lock();
-    }
+		if (ptr) { ptr->getResourceLock()->lock(); }
+	}
 
 	~ContextPtr() {
-		if (ptr) ptr->getResourceLock()->unlock();
+		if (ptr) { ptr->getResourceLock()->unlock(); }
 	}
 
+	ContextPtr(ContextPtr const &) = delete;
+	ContextPtr & operator=(ContextPtr const &) = delete;
+	ContextPtr(ContextPtr && other) : ptr(other.ptr) { other.ptr = nullptr; }
+	ContextPtr & operator=(ContextPtr && other) { ptr = other.ptr; other.ptr = nullptr; return *this; }
+
 	Context *operator ->() { return ptr; }
 	operator bool() const { return ptr != nullptr; }