_common_2_ak_platform_funcs_8h

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Wwise SDK 2022.1.7

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 // AkPlatformFuncs.h

 /// \file 

 /// Platform-dependent functions definition.

 #ifndef _AK_TOOLS_COMMON_AKPLATFORMFUNCS_H

 #define _AK_TOOLS_COMMON_AKPLATFORMFUNCS_H

 #include <AK/SoundEngine/Common/AkTypes.h>

 #include <AK/SoundEngine/Common/AkAtomic.h>

 // Uncomment the following to enable built-in platform profiler markers in the sound engine

 //#define AK_ENABLE_INSTRUMENT

 #if defined(AK_WIN)

 #include <AK/Tools/Win32/AkPlatformFuncs.h>

 #elif defined (AK_XBOX)

 #include <AK/Tools/XboxOne/AkPlatformFuncs.h>

 #elif defined (AK_APPLE)

 #include <AK/Tools/Mac/AkPlatformFuncs.h>

 #include <AK/Tools/POSIX/AkPlatformFuncs.h>

 #elif defined( AK_ANDROID ) || defined ( AK_LINUX_AOSP ) 

 #include <AK/Tools/Android/AkPlatformFuncs.h>

 #elif defined (AK_PS4)

 #include <AK/Tools/PS4/AkPlatformFuncs.h>

 #elif defined (AK_PS5)

 #include <AK/Tools/PS5/AkPlatformFuncs.h>

 #elif defined (AK_EMSCRIPTEN)

 #include <AK/Tools/Emscripten/AkPlatformFuncs.h>

 #elif defined (AK_LINUX)

 #ifdef AK_GGP

 #include <AK/Tools/GGP/AkPlatformFuncs.h>

 #endif

 #include <AK/Tools/Linux/AkPlatformFuncs.h>

 #include <AK/Tools/POSIX/AkPlatformFuncs.h>

 #elif defined (AK_QNX)

 #include <AK/Tools/QNX/AkPlatformFuncs.h>

 #include <AK/Tools/POSIX/AkPlatformFuncs.h>

 #elif defined (AK_NX)

 #include <AK/Tools/NX/AkPlatformFuncs.h>

 #else

 #error AkPlatformFuncs.h: Undefined platform

 #endif

 #ifndef AkPrefetchZero

 #define AkPrefetchZero(___Dest, ___Size)

 #endif

 #ifndef AkPrefetchZeroAligned

 #define AkPrefetchZeroAligned(___Dest, ___Size)

 #endif

 #ifndef AkZeroMemAligned

 #define AkZeroMemAligned(___Dest, ___Size) AKPLATFORM::AkMemSet(___Dest, 0, ___Size);

 #endif

 #ifndef AkZeroMemLarge

 #define AkZeroMemLarge(___Dest, ___Size) AKPLATFORM::AkMemSet(___Dest, 0, ___Size);

 #endif

 #ifndef AkZeroMemSmall

 #define AkZeroMemSmall(___Dest, ___Size) AKPLATFORM::AkMemSet(___Dest, 0, ___Size);

 #endif

 #ifndef AkAllocaSIMD

 #ifdef __clang__

 #if __has_builtin( __builtin_alloca_with_align )

 #define AkAllocaSIMD( _size_ ) __builtin_alloca_with_align( _size_, 128 )

 #else

 // work around alloca alignment issues in versions of clang before 4.0

 #define AkAllocaSIMD( _size_ ) (void*)( ( ( uintptr_t )AkAlloca( _size_ + 16 ) + 0xF ) & ~0xF )

 #endif

 #else

 #define AkAllocaSIMD( _size_ ) AkAlloca( _size_ )

 #endif

 #endif

 #ifndef AK_THREAD_INIT_CODE

 #define AK_THREAD_INIT_CODE(_threadProperties)

 #endif

 /// Utility functions

 namespace AK

 {

     /// Count non-zero bits.

     /// \return Number of channels.

     AkForceInline AkUInt32 GetNumNonZeroBits( AkUInt32 in_uWord )

     {

         AkUInt32 num = 0;

         while( in_uWord ){ ++num; in_uWord &= in_uWord-1; }

         return num;

     }

     /// Computes the next power of two given a value.

     /// \return next power of two.

     AkForceInline AkUInt32 GetNextPowerOfTwo( AkUInt32 in_uValue )

     {

         in_uValue--;

         in_uValue |= in_uValue >> 1;

         in_uValue |= in_uValue >> 2;

         in_uValue |= in_uValue >> 4;

         in_uValue |= in_uValue >> 8;

         in_uValue |= in_uValue >> 16;

         in_uValue++;

         return in_uValue;

     }

     AkForceInline AkUInt32 ROTL32( AkUInt32 x, AkUInt32 r )

     {

         return ( x << r ) | ( x >> ( 32 - r ) );

     }

     AkForceInline AkUInt64 ROTL64( AkUInt64 x, AkUInt64 r )

     {

         return ( x << r ) | ( x >> ( 64 - r ) );

     }

 }

 /// Platform-dependent helpers

 namespace AKPLATFORM

 {

     inline void AkGetDefaultHighPriorityThreadProperties(AkThreadProperties& out_threadProperties)

     {

         AkGetDefaultThreadProperties(out_threadProperties);

         out_threadProperties.nPriority = AK_THREAD_PRIORITY_ABOVE_NORMAL;

     }

 #if defined _MSC_VER && defined AK_CPU_X86_64

     AkForceInline AkUInt32 AkBitScanForward64(unsigned long long in_bits)

     {

         unsigned long ret = 0;

         _BitScanForward64(&ret, in_bits);

         return ret;

     }

 #elif __clang__ || defined __GNUG__

     AkForceInline AkUInt32 AkBitScanForward64(AkUInt64 in_bits)

     {

         return __builtin_ctzll(in_bits);

     }

 #else

     AkForceInline AkUInt32 AkBitScanForward64(unsigned long long in_bits)

     {

         unsigned long ret = 0;

         if (in_bits)

         {

             while ((in_bits & 1ULL) == 0)

             {

                 in_bits >>= 1;

                 ret++;

             }

         }

         return ret;

     }

 #endif

 #if defined _MSC_VER

     AkForceInline AkUInt32 AkBitScanForward(unsigned long in_bits)

     {

         unsigned long ret = 0;

         _BitScanForward(&ret, in_bits);

         return ret;

     }

 #elif __clang__ || defined __GNUG__

     AkForceInline AkUInt32 AkBitScanForward(AkUInt32 in_bits)

     {

         return __builtin_ctzl(in_bits);

     }

 #else

     AkForceInline AkUInt32 AkBitScanForward(unsigned long in_bits)

     {

         unsigned long ret = 0;

         if (in_bits)

         {

             while ((in_bits & 1ULL) == 0)

             {

                 in_bits >>= 1;

                 ret++;

             }

         }

         return ret;

     }

 #endif

     // fallback implementations for when platform don't have their own implementation

 #if !defined(AK_LIMITEDSPINFORZERO)

     // Waits for a limited amount of time for in_pVal to hit zero (without yielding the thread)

     inline void AkLimitedSpinForZero(AkAtomic32* in_pVal)

     {

         AkInt64 endSpinTime = 0;

         AkInt64 currentTime = 0;

         PerformanceCounter(&endSpinTime);

         endSpinTime += AkInt64(AK::g_fFreqRatio * 0.01); // only spin for about 10us

         while (true)

         {

             // if pval is zero, skip out

             if (AkAtomicLoad32(in_pVal) == 0)

             {

                 break;

             }

             AkSpinHint();

             // Check if we've hit the deadline for the timeout

             PerformanceCounter(&currentTime);

             if (currentTime > endSpinTime)

             {

                 break;

             }

         }

     }

     // Waits for a limited amount of time for in_pVal to get atomically shift from the expected value to the proposed one

     // returns true if acquisition succeeded

     inline bool AkLimitedSpinToAcquire(AkAtomic32* in_pVal, AkInt32 in_proposed, AkInt32 in_expected)

     {

         if (AkAtomicCas32(in_pVal, in_proposed, in_expected))

         {

             return true;

         }

         // Cas failed, start the slower evaluation

         AkInt64 endSpinTime = 0;

         AkInt64 currentTime = 0;

         PerformanceCounter(&endSpinTime);

         endSpinTime += AkInt64(AK::g_fFreqRatio * 0.01); // only spin for about 10us

         while (true)

         {

             // attempt cas to acquire and if successful, skip out

             if (AkAtomicCas32(in_pVal, in_proposed, in_expected))

             {

                 return true;

             }

             AkSpinHint();

             // Check if we've hit the deadline for the timeout

             PerformanceCounter(&currentTime);

             if (currentTime > endSpinTime)

             {

                 return false;

             }

         }

     }

 #endif

     inline void AkSpinWaitForZero(AkAtomic32* in_pVal)

     {

         if (AkAtomicLoad32(in_pVal) == 0)

         {

             return;

         }

         // do a limited spin on-the-spot until in_pVal hits zero

         AkLimitedSpinForZero(in_pVal);

         // if in_pVal is still non-zero, then the other thread is either blocked or waiting for us.  Yield for real.

         while (AkAtomicLoad32(in_pVal))

             AkThreadYield();

     }

     // Waits for a limited amount of time for in_pVal to get atomically shift from 0 to 1

     inline void AkSpinToAcquire(AkAtomic32* in_pVal, AkInt32 in_proposed, AkInt32 in_expected)

     {

         // do a limited spin on-the-spot until in_pVal can successfully hit 1

         // or if it fails, then the other thread is either blocked or waiting for us.  Yield for real.

         while (!AkLimitedSpinToAcquire(in_pVal, in_proposed, in_expected))

         {

             AkThreadYield();

         }

     }

 }

 #ifndef AK_PERF_RECORDING_RESET

 #define AK_PERF_RECORDING_RESET()

 #endif

 #ifndef AK_PERF_RECORDING_START

 #define AK_PERF_RECORDING_START( __StorageName__, __uExecutionCountStart__, __uExecutionCountStop__ )

 #endif

 #ifndef AK_PERF_RECORDING_STOP

 #define AK_PERF_RECORDING_STOP( __StorageName__, __uExecutionCountStart__, __uExecutionCountStop__ )    

 #endif

 #endif // _AK_TOOLS_COMMON_AKPLATFORMFUNCS_H