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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_