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-rw-r--r--gfx/angle/checkout/src/common/tls.h54
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
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+++ b/gfx/angle/checkout/src/common/tls.h
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+//
+// 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_