1 files changed, 54 insertions, 0 deletions
diff --git a/gfx/angle/checkout/src/common/tls.h b/gfx/angle/checkout/src/common/tls.h
new file mode 100644
index 0000000000..4075f3c030
--- /dev/null
+++ b/gfx/angle/checkout/src/common/tls.h
@@ -0,0 +1,54 @@
+//
+// Copyright 2014 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// tls.h: Simple cross-platform interface for thread local storage.
+
+#ifndef COMMON_TLS_H_
+#define COMMON_TLS_H_
+
+#include "common/angleutils.h"
+#include "common/platform.h"
+
+#ifdef ANGLE_PLATFORM_WINDOWS
+#    include <windows.h>
+#endif
+
+namespace gl
+{
+class Context;
+}
+
+#ifdef ANGLE_PLATFORM_WINDOWS
+
+// TLS does not exist for Windows Store and needs to be emulated
+#    ifdef ANGLE_ENABLE_WINDOWS_UWP
+#        ifndef TLS_OUT_OF_INDEXES
+#            define TLS_OUT_OF_INDEXES static_cast<DWORD>(0xFFFFFFFF)
+#        endif
+#        ifndef CREATE_SUSPENDED
+#            define CREATE_SUSPENDED 0x00000004
+#        endif
+#    endif
+typedef DWORD TLSIndex;
+#    define TLS_INVALID_INDEX (TLS_OUT_OF_INDEXES)
+#elif defined(ANGLE_PLATFORM_POSIX)
+#    include <errno.h>
+#    include <pthread.h>
+#    include <semaphore.h>
+typedef pthread_key_t TLSIndex;
+#    define TLS_INVALID_INDEX (static_cast<TLSIndex>(-1))
+#else
+#    error Unsupported platform.
+#endif
+
+using PthreadKeyDestructor = void (*)(void *);
+TLSIndex CreateTLSIndex(PthreadKeyDestructor destructor);
+bool DestroyTLSIndex(TLSIndex index);
+
+bool SetTLSValue(TLSIndex index, void *value);
+void *GetTLSValue(TLSIndex index);
+
+#endif  // COMMON_TLS_H_