AndroidPlatformTLS.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
 
/*=============================================================================================
    AndroidTLS.h: Android platform TLS (Thread local storage and thread ID) functions
==============================================================================================*/
 
#pragma once
#include "GenericPlatform/GenericPlatformTLS.h"
#include "Android/AndroidSystemIncludes.h"
 
struct FAndroidTLS : public FGenericPlatformTLS
{
    static inline uint32 GetCurrentThreadId(void)
    {
        static_assert(sizeof(pid_t) <= sizeof(uint32), "pid_t is larger than uint32, reconsider implementation of GetCurrentThreadId()");
        return static_cast<uint32>(gettid());
//      return pthread_self();
    }
 
    static inline uint32 AllocTlsSlot(void)
    {
        // allocate a per-thread mem slot
        pthread_key_t Key = 0;
        if (pthread_key_create(&Key, NULL) != 0)
        {
            Key = InvalidTlsSlot;  // matches the Windows TlsAlloc() retval //@todo android: should probably check for this below, or assert out instead
        }
        return Key;
    }
 
    static UE_FORCEINLINE_HINT void SetTlsValue(uint32 SlotIndex,void* Value)
    {
        pthread_setspecific((pthread_key_t)SlotIndex, Value);
    }
 
    static UE_FORCEINLINE_HINT void* GetTlsValue(uint32 SlotIndex)
    {
        return pthread_getspecific((pthread_key_t)SlotIndex);
    }
 
    static UE_FORCEINLINE_HINT void FreeTlsSlot(uint32 SlotIndex)
    {
        pthread_key_delete((pthread_key_t)SlotIndex);
    }
};
 
typedef FAndroidTLS FPlatformTLS;