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107 lines
2.7 KiB
107 lines
2.7 KiB
//========== Copyright © Valve Corporation, All rights reserved. ========
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#if !defined( VJOBPOOL_HDR ) && defined( _PS3 )
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#define VJOBPOOL_HDR
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#include "ps3/spu_job_shared.h"
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#include "cell/atomic.h"
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//#include "ps3/vjobutils.h"
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template < typename Job, uint nAlignment = 128 >
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class VjobPool
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{
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public:
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#ifndef SPU
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void Init( uint nJobs ) // must be integer-power-of-2
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{
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m_nJobIndexMask = nJobs - 1;
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Assert( !( m_nJobIndexMask & nJobs ) );
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uint nSizeToAllocate = sizeof( Job ) * nJobs;
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m_eaPool = ( Job* )MemAlloc_AllocAligned( nSizeToAllocate, nAlignment );
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V_memset( m_eaPool, 0, nSizeToAllocate );
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m_nNextJob = 0;
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m_nWaitSpins = 0;
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}
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void Shutdown()
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{
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// wait for all jobs to finish
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for ( uint i = 0; i <= m_nJobIndexMask; ++i )
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{
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volatile const uint64 * pEa = ( const uint64* ) & m_eaPool[i];
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while ( *pEa )
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{
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continue;
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}
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}
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MemAlloc_FreeAligned( m_eaPool );
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m_eaPool = NULL;
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}
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Job * Alloc( const CellSpursJobHeader & header ) // the job header is freed when its eaBinary is overwritten with zeroes from within the job
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{
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Job * pJob = Alloc();
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V_memcpy( pJob, &header, sizeof( header ) );
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return pJob;
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}
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#endif
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Job * Alloc( ); // the job header is freed when its eaBinary is overwritten with zeroes from within the job
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uint GetMarker()const { return m_nNextJob; }
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uint GetCapacity()const { return m_nJobIndexMask + 1; }
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int GetReserve( uint nMarker )const { return int( GetCapacity() - ( m_nNextJob - nMarker ) ); }
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public:
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uint m_nWaitSpins; // debug field
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protected:
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Job * m_eaPool;
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uint m_nJobIndexMask;
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// this is just a hint
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uint m_nNextJob;
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};
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template < typename Job, uint nAlignment >
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Job * VjobPool<Job, nAlignment>::Alloc( ) // the job header is freed when its eaBinary is overwritten with zeroes from within the job
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{
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uint nNextJob = m_nNextJob;
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Job * eaJob = NULL;
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for( ;; )
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{
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eaJob = &m_eaPool[ ( nNextJob & m_nJobIndexMask ) ];
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#ifdef SPU
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char ALIGN128 temp[128] ALIGN128_POST;
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// it's important to fill in and compare the first 64 bits, because that's where eaBinary is, and the first 32 bits (MSB) may be zero
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if( 0 == cellAtomicCompareAndSwap64( (uint64*)temp, ( uintp )eaJob, 0, ~0ull ) )
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{
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break;
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}
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++m_nWaitSpins;
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#else
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// it's important to fill in and compare the first 64 bits, because that's where eaBinary is, and the first 32 bits (MSB) may be zero
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if( 0 == cellAtomicCompareAndSwap64( ( uint64* )eaJob, 0, ~0ull ) )
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{
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break;
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}
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if( ( ( ( ++nNextJob ) ^ m_nNextJob ) & m_nJobIndexMask ) == 0 )
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{
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// we've made the full circle; yield
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m_nWaitSpins++;
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sys_timer_usleep( 30 );
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}
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#endif
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}
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// this is just a hint
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m_nNextJob = nNextJob + 1;
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return eaJob;
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}
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#endif
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