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threadtools.cpp
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//========== Copyright 2005, Valve Corporation, All rights reserved. ========
//
// Purpose:
//
//=============================================================================
#include "tier0/platform.h"
#if defined(_WIN32)
#define WIN32_LEAN_AND_MEAN
#define _WIN32_WINNT 0x0403
#include <windows.h>
#endif
#ifdef _WIN32
#include <process.h>
#include <Mmsystem.h>
#pragma comment(lib, "winmm.lib")
#include "tier0/vcrmode.h"
#elif POSIX
#include <sched.h>
#include <exception>
#include <errno.h>
#include <signal.h>
#include <pthread.h>
#include <sys/time.h>
#define GetLastError() errno
typedef void *LPVOID;
#if defined(OSX)
#define pthread_yield pthread_yield_np
#include <mach/thread_act.h>
#include <mach/mach.h>
#define OS_TO_PTHREAD(x) pthread_from_mach_thread_np( x )
#elif defined(PLATFORM_BSD)
#define OS_TO_PTHREAD(x) (pthread_t)(x)
#else
#include <fcntl.h>
#include <unistd.h>
#define sem_unlink( arg )
#define OS_TO_PTHREAD(x) (x)
#endif // !OSX
#endif
#ifndef _PS3
#include <memory.h>
#endif
#include "tier0/minidump.h"
#include "tier0/threadtools.h"
#include "tier0/dynfunction.h"
#ifdef _X360
#include "xbox/xbox_win32stubs.h"
#endif
#include <map>
// Must be last header...
#include "tier0/memdbgon.h"
#ifdef _PS3
#include "ps3/ps3_win32stubs.h"
#define NEW_WAIT_FOR_MULTIPLE_OBJECTS
bool gbCheckNotMultithreaded = true;
extern "C" void(*g_pfnPushMarker)( const char * pName );
extern "C" void(*g_pfnPopMarker)();
#endif
#define THREADS_DEBUG 1
#define DEBUG_ERROR(XX) Assert(0)
// Need to ensure initialized before other clients call in for main thread ID
#ifdef _WIN32
#pragma warning(disable:4073)
#pragma init_seg(lib)
#endif
#ifdef _WIN32
ASSERT_INVARIANT(TT_SIZEOF_CRITICALSECTION == sizeof(CRITICAL_SECTION));
ASSERT_INVARIANT(TT_INFINITE == INFINITE);
#endif
// thread creation counter.
// this is used to provide a unique threadid for each running thread in g_nThreadID ( a thread local variable ).
const int MAX_THREAD_IDS = 128;
static volatile bool s_bThreadIDAllocated[MAX_THREAD_IDS];
#if defined(_PS3)
#include "tls_ps3.h"
#else
DLL_CLASS_EXPORT CTHREADLOCALINT g_nThreadID;
#endif
static CThreadFastMutex s_ThreadIDMutex;
PLATFORM_INTERFACE void AllocateThreadID( void )
{
AUTO_LOCK( s_ThreadIDMutex );
for( int i = 1; i < MAX_THREAD_IDS; i++ )
{
if ( ! s_bThreadIDAllocated[i] )
{
g_nThreadID = i;
s_bThreadIDAllocated[i] = true;
return;
}
}
Error( "Out of thread ids. Decrease the number of threads or increase MAX_THREAD_IDS\n" );
}
PLATFORM_INTERFACE void FreeThreadID( void )
{
AUTO_LOCK( s_ThreadIDMutex );
int nThread = g_nThreadID;
if ( nThread )
s_bThreadIDAllocated[nThread] = false;
}
//-----------------------------------------------------------------------------
// Simple thread functions.
// Because _beginthreadex uses stdcall, we need to convert to cdecl
//-----------------------------------------------------------------------------
struct ThreadProcInfo_t
{
ThreadProcInfo_t( ThreadFunc_t pfnThread, void *pParam )
: pfnThread( pfnThread),
pParam( pParam )
{
}
ThreadFunc_t pfnThread;
void * pParam;
};
//---------------------------------------------------------
#ifdef _WIN32
static DWORD WINAPI ThreadProcConvert( void *pParam )
{
ThreadProcInfo_t info = *((ThreadProcInfo_t *)pParam);
AllocateThreadID();
delete ((ThreadProcInfo_t *)pParam);
unsigned nRet = (*info.pfnThread)(info.pParam);
FreeThreadID();
return nRet;
}
#elif defined( PS3 )
union ThreadProcInfoUnion_t
{
struct Val_t
{
ThreadFunc_t pfnThread;
void * pParam;
}
val;
uint64_t val64;
};
static void ThreadProcConvertUnion( uint64_t param )
{
COMPILE_TIME_ASSERT( sizeof( ThreadProcInfoUnion_t ) == 8 );
ThreadProcInfoUnion_t info;
info.val64 = param;
AllocateThreadID();
unsigned nRet = (*info.val.pfnThread)(info.val.pParam);
FreeThreadID();
sys_ppu_thread_exit( nRet );
}
static void* ThreadProcConvert( void *pParam )
{
ThreadProcInfo_t info = *((ThreadProcInfo_t *)pParam);
AllocateThreadID();
delete ((ThreadProcInfo_t *)pParam);
unsigned nRet = (*info.pfnThread)(info.pParam);
FreeThreadID();
return ( void * ) nRet;
}
#else
static void* ThreadProcConvert( void *pParam )
{
ThreadProcInfo_t info = *((ThreadProcInfo_t *)pParam);
AllocateThreadID();
delete ((ThreadProcInfo_t *)pParam);
unsigned nRet = (*info.pfnThread)(info.pParam);
FreeThreadID();
return ( void * ) (uintp) nRet;
}
#endif
#if defined( _PS3 )
/*******************************************************************************
* Thread Local Storage globals and functions
*******************************************************************************/
#ifndef _PS3
__thread void *gTLSValues[ MAX_TLS_VALUES ] = { NULL };
__thread bool gTLSFlags[ MAX_TLS_VALUES ] = { false };
__thread bool gbWaitObjectsCreated = false;
__thread sys_semaphore_t gWaitObjectsSemaphore;
#endif // !_PS3
static char gThreadName[28] = "";
// Simple TLS allocator. Linearly searches for a free slot.
uint32 TlsAlloc()
{
for ( int i = 0; i < MAX_TLS_VALUES; ++i )
{
if ( !gTLSFlags[i] )
{
gTLSFlags[i] = true;
return i;
}
}
#ifdef _PS3
DEBUG_ERROR("TlsAlloc(): Out of TLS\n");
#endif
return 0xFFFFFFFF;
}
void TlsFree( uint32 index )
{
gTLSValues[ index ] = NULL;
gTLSFlags[ index ] = false;
}
void *TlsGetValue( uint32 index )
{
return gTLSValues[ index ];
}
void TlsSetValue( uint32 index, void *pValue )
{
gTLSValues[ index ] = pValue;
}
#endif //_PS3
#ifdef _WIN32
class CThreadHandleToIDMap
{
public:
HANDLE m_hThread;
uint m_ThreadID;
CThreadHandleToIDMap *m_pNext;
};
static CThreadHandleToIDMap *g_pThreadHandleToIDMaps = NULL;
static CThreadMutex g_ThreadHandleToIDMapMutex;
static volatile int g_nThreadHandleToIDMaps = 0;
static void AddThreadHandleToIDMap( HANDLE hThread, uint threadID )
{
if ( !hThread )
return;
// Remember this handle/id combo.
CThreadHandleToIDMap *pMap = new CThreadHandleToIDMap;
pMap->m_hThread = hThread;
pMap->m_ThreadID = threadID;
// Add it to the global list.
g_ThreadHandleToIDMapMutex.Lock();
pMap->m_pNext = g_pThreadHandleToIDMaps;
g_pThreadHandleToIDMaps = pMap;
++g_nThreadHandleToIDMaps;
g_ThreadHandleToIDMapMutex.Unlock();
if ( g_nThreadHandleToIDMaps > 500 )
Error( "ThreadHandleToIDMap overflow." );
}
// This assumes you've got g_ThreadHandleToIDMapMutex locked!!
static bool InternalLookupHandleToThreadIDMap( HANDLE hThread, CThreadHandleToIDMap* &pMap, CThreadHandleToIDMap** &ppPrev )
{
ppPrev = &g_pThreadHandleToIDMaps;
for ( pMap=g_pThreadHandleToIDMaps; pMap; pMap=pMap->m_pNext )
{
if ( pMap->m_hThread == hThread )
return true;
ppPrev = &pMap->m_pNext;
}
return false;
}
static void RemoveThreadHandleToIDMap( HANDLE hThread )
{
if ( !hThread )
return;
CThreadHandleToIDMap *pMap, **ppPrev;
g_ThreadHandleToIDMapMutex.Lock();
if ( g_nThreadHandleToIDMaps <= 0 )
Error( "ThreadHandleToIDMap underflow." );
if ( InternalLookupHandleToThreadIDMap( hThread, pMap, ppPrev ) )
{
*ppPrev = pMap->m_pNext;
delete pMap;
--g_nThreadHandleToIDMaps;
}
g_ThreadHandleToIDMapMutex.Unlock();
}
static uint LookupThreadIDFromHandle( HANDLE hThread )
{
if ( hThread == NULL || hThread == GetCurrentThread() )
return GetCurrentThreadId();
float flStartTime = Plat_FloatTime();
while ( Plat_FloatTime() - flStartTime < 2 )
{
CThreadHandleToIDMap *pMap, **ppPrev;
g_ThreadHandleToIDMapMutex.Lock();
bool bRet = InternalLookupHandleToThreadIDMap( hThread, pMap, ppPrev );
g_ThreadHandleToIDMapMutex.Unlock();
if ( bRet )
return pMap->m_ThreadID;
// We should only get here if a thread that is just starting up is currently in AddThreadHandleToIDMap.
// Give up the timeslice and try again.
ThreadSleep( 1 );
}
Assert( !"LookupThreadIDFromHandle failed!" );
Warning( "LookupThreadIDFromHandle couldn't find thread ID for handle." );
return 0;
}
#endif
//---------------------------------------------------------
ThreadHandle_t * CreateTestThreads( ThreadFunc_t fnThread, int numThreads, int nProcessorsToDistribute )
{
ThreadHandle_t *pHandles = (new ThreadHandle_t[numThreads+1]) + 1;
pHandles[-1] = (ThreadHandle_t)INT_TO_POINTER( numThreads );
for( int i = 0; i < numThreads; ++i )
{
//TestThreads();
ThreadHandle_t hThread;
const unsigned int nDefaultStackSize = 64 * 1024; // this stack size is used in case stackSize == 0
hThread = CreateSimpleThread( fnThread, INT_TO_POINTER( i ), nDefaultStackSize );
if ( nProcessorsToDistribute )
{
int32 mask = 1 << (i % nProcessorsToDistribute);
ThreadSetAffinity( hThread, mask );
}
/*
ThreadProcInfoUnion_t info;
info.val.pfnThread = fnThread;
info.val.pParam = (void*)(i);
if ( int nError = sys_ppu_thread_create( &hThread, ThreadProcConvertUnion, info.val64, 1001, nDefaultStackSize, SYS_PPU_THREAD_CREATE_JOINABLE, "SimpleThread" ) != CELL_OK )
{
printf( "PROBLEM!\n" );
Error( "Cannot create thread, error %d\n", nError );
return 0;
}
*/
//ThreadHandle_t hThread = CreateSimpleThread( fnThread, (void*)i );
pHandles[i] = hThread;
}
// printf("Finishinged CreateTestThreads(%p,%d)\n", (void*)fnThread, numThreads );
return pHandles;
}
void JoinTestThreads( ThreadHandle_t *pHandles )
{
int nCount = POINTER_TO_INT( (uintp)pHandles[-1] );
// printf("Joining test threads @%p[%d]:\n", pHandles, nCount );
// for( int i = 0; i < nCount; ++i )
// {
// printf(" %p,\n", (void*)pHandles[i] );
// }
for( int i = 0; i < nCount; ++i )
{
// printf( "Joining %p", (void*) pHandles[i] );
// if( !i ) sys_timer_usleep(100000);
ThreadJoin( pHandles[i] );
ReleaseThreadHandle( pHandles[i] );
}
delete[]( pHandles - 1 );
}
ThreadHandle_t CreateSimpleThread( ThreadFunc_t pfnThread, void *pParam, unsigned stackSize )
{
#ifdef _WIN32
DWORD threadID;
HANDLE hThread = (HANDLE)CreateThread( NULL, stackSize, ThreadProcConvert, new ThreadProcInfo_t( pfnThread, pParam ), stackSize ? STACK_SIZE_PARAM_IS_A_RESERVATION : 0, &threadID );
AddThreadHandleToIDMap( hThread, threadID );
return (ThreadHandle_t)hThread;
#elif PS3
//TestThreads();
ThreadHandle_t th;
ThreadProcInfoUnion_t info;
info.val.pfnThread = pfnThread;
info.val.pParam = pParam;
const unsigned int nDefaultStackSize = 64 * 1024; // this stack size is used in case stackSize == 0
if ( sys_ppu_thread_create( &th, ThreadProcConvertUnion, info.val64, 1001, stackSize ? stackSize : nDefaultStackSize, SYS_PPU_THREAD_CREATE_JOINABLE, "SimpleThread" ) != CELL_OK )
{
AssertMsg1( 0, "Failed to create thread (error 0x%x)", errno );
return 0;
}
return th;
#elif POSIX
pthread_t tid;
pthread_create( &tid, NULL, ThreadProcConvert, new ThreadProcInfo_t( pfnThread, pParam ) );
return ( ThreadHandle_t ) tid;
#else
Assert( 0 );
DebuggerBreak();
return 0;
#endif
}
ThreadHandle_t CreateSimpleThread( ThreadFunc_t pfnThread, void *pParam, ThreadId_t *pID, unsigned stackSize )
{
#ifdef _WIN32
DWORD threadID;
HANDLE hThread = (HANDLE)CreateThread( NULL, stackSize, ThreadProcConvert, new ThreadProcInfo_t( pfnThread, pParam ), stackSize ? STACK_SIZE_PARAM_IS_A_RESERVATION : 0, &threadID );
if( pID )
*pID = (ThreadId_t)threadID;
AddThreadHandleToIDMap( hThread, threadID );
return (ThreadHandle_t)hThread;
#elif POSIX
pthread_t tid;
pthread_create( &tid, NULL, ThreadProcConvert, new ThreadProcInfo_t( pfnThread, pParam ) );
if( pID )
*pID = (ThreadId_t)tid;
return ( ThreadHandle_t ) tid;
#else
Assert( 0 );
DebuggerBreak();
return 0;
#endif
}
bool ReleaseThreadHandle( ThreadHandle_t hThread )
{
#ifdef _WIN32
bool bRetVal = ( CloseHandle( hThread ) != 0 );
RemoveThreadHandleToIDMap( (HANDLE)hThread );
return bRetVal;
#else
return true;
#endif
}
//-----------------------------------------------------------------------------
//
// Wrappers for other simple threading operations
//
//-----------------------------------------------------------------------------
#ifndef ThreadGetCurrentId
ThreadId_t ThreadGetCurrentId()
{
#ifdef _WIN32
return GetCurrentThreadId();
#elif defined( _PS3 )
sys_ppu_thread_t th = 0;
sys_ppu_thread_get_id( &th );
return th;
#elif defined(POSIX)
return (ThreadId_t)pthread_self();
#else
Assert(0);
DebuggerBreak();
return 0;
#endif
}
#endif
//-----------------------------------------------------------------------------
ThreadHandle_t ThreadGetCurrentHandle()
{
#ifdef _WIN32
return (ThreadHandle_t)GetCurrentThread();
#elif defined( _PS3 )
sys_ppu_thread_t th = 0;
sys_ppu_thread_get_id( &th );
return th;
#elif defined(POSIX)
return (ThreadHandle_t)pthread_self();
#else
Assert(0);
DebuggerBreak();
return 0;
#endif
}
// On PS3, this will return true for zombie threads
bool ThreadIsThreadIdRunning( ThreadId_t uThreadId )
{
#ifdef _WIN32
bool bRunning = true;
HANDLE hThread = ::OpenThread( THREAD_QUERY_INFORMATION , false, uThreadId );
if ( hThread )
{
DWORD dwExitCode;
if( !::GetExitCodeThread( hThread, &dwExitCode ) || dwExitCode != STILL_ACTIVE )
bRunning = false;
CloseHandle( hThread );
}
else
{
bRunning = false;
}
return bRunning;
#elif defined( _PS3 )
// will return CELL_OK for zombie threads
int priority;
return (sys_ppu_thread_get_priority( uThreadId, &priority ) == CELL_OK );
#elif defined(POSIX)
int iResult = pthread_kill( OS_TO_PTHREAD(uThreadId), 0 );
if ( iResult == 0 )
return true;
return false;
#endif
}
//-----------------------------------------------------------------------------
int ThreadGetPriority( ThreadHandle_t hThread )
{
if ( !hThread )
{
hThread = ThreadGetCurrentHandle();
}
#ifdef _WIN32
return ::GetThreadPriority( (HANDLE)hThread );
#elif defined( _PS3 )
int iPri = 0;
sys_ppu_thread_get_priority( hThread, &iPri );
return iPri;
#else
return 0;
#endif
}
//-----------------------------------------------------------------------------
bool ThreadSetPriority( ThreadHandle_t hThread, int priority )
{
if ( !hThread )
{
hThread = ThreadGetCurrentHandle();
}
#ifdef _WIN32
return ( SetThreadPriority(hThread, priority) != 0 );
#elif defined( _PS3 )
int retval = sys_ppu_thread_set_priority( hThread, priority );
return retval >= CELL_OK;
#elif defined(POSIX)
struct sched_param thread_param;
thread_param.sched_priority = priority;
//pthread_setschedparam( (pthread_t ) hThread, SCHED_RR, &thread_param );
return true;
#endif
}
//-----------------------------------------------------------------------------
void ThreadSetAffinity( ThreadHandle_t hThread, int nAffinityMask )
{
if ( !hThread )
{
hThread = ThreadGetCurrentHandle();
}
#ifdef _WIN32
SetThreadAffinityMask( hThread, nAffinityMask );
#elif defined(POSIX)
// cpu_set_t cpuSet;
// CPU_ZERO( cpuSet );
// for( int i = 0 ; i < 32; i++ )
// if ( nAffinityMask & ( 1 << i ) )
// CPU_SET( cpuSet, i );
// sched_setaffinity( hThread, sizeof( cpuSet ), &cpuSet );
#endif
}
//-----------------------------------------------------------------------------
#ifndef _X360
ThreadId_t InitMainThread()
{
ThreadSetDebugName( "MainThrd" );
return ThreadGetCurrentId();
}
ThreadId_t g_ThreadMainThreadID = InitMainThread();
bool ThreadInMainThread()
{
return ( ThreadGetCurrentId() == g_ThreadMainThreadID );
}
void DeclareCurrentThreadIsMainThread()
{
g_ThreadMainThreadID = ThreadGetCurrentId();
}
#else
byte *InitMainThread()
{
byte b;
return AlignValue( &b, 64*1024 );
}
#define STACK_SIZE_360 327680
byte *g_pBaseMainStack = InitMainThread();
byte *g_pLimitMainStack = InitMainThread() - STACK_SIZE_360;
#endif
//-----------------------------------------------------------------------------
bool ThreadJoin( ThreadHandle_t hThread, unsigned timeout )
{
if ( !hThread )
{
return false;
}
#ifdef _WIN32
DWORD dwWait = WaitForSingleObject( (HANDLE)hThread, timeout );
if ( dwWait == WAIT_TIMEOUT)
return false;
if ( dwWait != WAIT_OBJECT_0 && ( dwWait != WAIT_FAILED && GetLastError() != 0 ) )
{
Assert( 0 );
return false;
}
#elif defined( _PS3 )
uint64 uiExitCode = 0;
int retval = sys_ppu_thread_join( hThread, &uiExitCode );
return ( retval >= CELL_OK );
#elif defined(POSIX)
if ( pthread_join( (pthread_t)hThread, NULL ) != 0 )
return false;
#else
Assert(0);
DebuggerBreak();
#endif
return true;
}
//-----------------------------------------------------------------------------
void ThreadSetDebugName( ThreadHandle_t hThread, const char *pszName )
{
#ifdef WIN32
if ( Plat_IsInDebugSession() )
{
#define MS_VC_EXCEPTION 0x406d1388
typedef struct tagTHREADNAME_INFO
{
DWORD dwType; // must be 0x1000
LPCSTR szName; // pointer to name (in same addr space)
DWORD dwThreadID; // thread ID (-1 caller thread)
DWORD dwFlags; // reserved for future use, most be zero
} THREADNAME_INFO;
THREADNAME_INFO info;
info.dwType = 0x1000;
info.szName = pszName;
info.dwThreadID = LookupThreadIDFromHandle( hThread );
if ( info.dwThreadID != 0 )
{
info.dwFlags = 0;
__try
{
RaiseException(MS_VC_EXCEPTION, 0, sizeof(info) / sizeof(DWORD), (ULONG_PTR *)&info);
}
__except (EXCEPTION_CONTINUE_EXECUTION)
{
}
}
}
#endif
}
//-----------------------------------------------------------------------------
#ifdef _WIN32
ASSERT_INVARIANT( TW_FAILED == WAIT_FAILED );
ASSERT_INVARIANT( TW_TIMEOUT == WAIT_TIMEOUT );
ASSERT_INVARIANT( WAIT_OBJECT_0 == 0 );
int ThreadWaitForObjects( int nEvents, const HANDLE *pHandles, bool bWaitAll, unsigned timeout )
{
return VCRHook_WaitForMultipleObjects( nEvents, pHandles, bWaitAll, timeout );
}
#endif
//-----------------------------------------------------------------------------
// Used to thread LoadLibrary on the 360
//-----------------------------------------------------------------------------
static ThreadedLoadLibraryFunc_t s_ThreadedLoadLibraryFunc = 0;
PLATFORM_INTERFACE void SetThreadedLoadLibraryFunc( ThreadedLoadLibraryFunc_t func )
{
s_ThreadedLoadLibraryFunc = func;
}
PLATFORM_INTERFACE ThreadedLoadLibraryFunc_t GetThreadedLoadLibraryFunc()
{
return s_ThreadedLoadLibraryFunc;
}
//-----------------------------------------------------------------------------
//
// CThreadSyncObject (note nothing uses this directly (I think) )
//
//-----------------------------------------------------------------------------
#ifdef _PS3
uint32_t CThreadSyncObject::m_bstaticMutexInitialized = false;
uint32_t CThreadSyncObject::m_bstaticMutexInitializing = false;
sys_lwmutex_t CThreadSyncObject::m_staticMutex;
#endif
CThreadSyncObject::CThreadSyncObject()
#ifdef _WIN32
: m_hSyncObject( NULL ), m_bCreatedHandle(false)
#elif defined(POSIX) && !defined(PS3)
: m_bInitalized( false )
#endif
{
#ifdef _PS3
//Do we nee to initialise the staticMutex?
if (m_bstaticMutexInitialized) return;
//If we are the first thread then create the mutex
if ( cellAtomicCompareAndSwap32(&m_bstaticMutexInitializing, false, true) == false )
{
sys_lwmutex_attribute_t mutexAttr;
sys_lwmutex_attribute_initialize( mutexAttr );
mutexAttr.attr_recursive = SYS_SYNC_RECURSIVE;
int err = sys_lwmutex_create( &m_staticMutex, &mutexAttr );
Assert(err == CELL_OK);
m_bstaticMutexInitialized = true;
}
else
{
//Another thread is already in the process of initialising the mutex, wait for it
while ( !m_bstaticMutexInitialized )
{
// sys_ppu_thread_yield doesn't seem to function properly, so sleep instead.
// sys_timer_usleep( 60 );
sys_ppu_thread_yield();
}
}
#endif
}
//---------------------------------------------------------
CThreadSyncObject::~CThreadSyncObject()
{
#ifdef _WIN32
if ( m_hSyncObject && m_bCreatedHandle )
{
if ( !CloseHandle(m_hSyncObject) )
{
Assert( 0 );
}
}
#elif defined(POSIX) && !defined( PS3 )
if ( m_bInitalized )
{
pthread_cond_destroy( &m_Condition );
pthread_mutex_destroy( &m_Mutex );
m_bInitalized = false;
}
#endif
}
//---------------------------------------------------------
bool CThreadSyncObject::operator!() const
{
#if PS3
return m_bstaticMutexInitialized;
#elif defined( _WIN32 )
return !m_hSyncObject;
#elif defined(POSIX)
return !m_bInitalized;
#endif
}
//---------------------------------------------------------
void CThreadSyncObject::AssertUseable()
{
#ifdef THREADS_DEBUG
#if PS3
AssertMsg( m_bstaticMutexInitialized, "Thread synchronization object is unuseable" );
#elif defined( _WIN32 )
AssertMsg( m_hSyncObject, "Thread synchronization object is unuseable" );
#elif defined(POSIX)
AssertMsg( m_bInitalized, "Thread synchronization object is unuseable" );
#endif
#endif
}
//---------------------------------------------------------
#if defined(_WIN32) || ( defined(POSIX) && !defined( _PS3 ) )
bool CThreadSyncObject::Wait( uint32 dwTimeout )
{
#ifdef THREADS_DEBUG
AssertUseable();
#endif
#ifdef _WIN32
return ( WaitForSingleObject( m_hSyncObject, dwTimeout ) == WAIT_OBJECT_0 );
#elif defined( POSIX ) && !defined( PS3 )
pthread_mutex_lock( &m_Mutex );
bool bRet = false;
if ( m_cSet > 0 )
{
bRet = true;
m_bWakeForEvent = false;
}
else
{
volatile int ret = 0;
while ( !m_bWakeForEvent && ret != ETIMEDOUT )
{
struct timeval tv;
gettimeofday( &tv, NULL );
volatile struct timespec tm;
uint64 actualTimeout = dwTimeout;
if ( dwTimeout == TT_INFINITE && m_bManualReset )
actualTimeout = 10; // just wait 10 msec at most for manual reset events and loop instead
volatile uint64 nNanoSec = (uint64)tv.tv_usec*1000 + (uint64)actualTimeout*1000000;
tm.tv_sec = tv.tv_sec + nNanoSec /1000000000;
tm.tv_nsec = nNanoSec % 1000000000;
do
{
ret = pthread_cond_timedwait( &m_Condition, &m_Mutex, (const timespec *)&tm );
}
while( ret == EINTR );
bRet = ( ret == 0 );
if ( m_bManualReset )
{
if ( m_cSet )
break;
if ( dwTimeout == TT_INFINITE && ret == ETIMEDOUT )
ret = 0; // force the loop to spin back around
}
}
if ( bRet )
m_bWakeForEvent = false;
}
if ( !m_bManualReset && bRet )
m_cSet = 0;
pthread_mutex_unlock( &m_Mutex );
return bRet;
#endif
}
#endif
uint32 CThreadSyncObject::WaitForMultiple( int nObjects, CThreadSyncObject **ppObjects, bool bWaitAll, uint32 dwTimeout )
{
#if defined( _WIN32 )
CThreadSyncObject *pHandles = (CThreadSyncObject*)stackalloc( sizeof(CThreadSyncObject) * nObjects );
for ( int i=0; i < nObjects; i++ )
{
pHandles[i].m_hSyncObject = ppObjects[i]->m_hSyncObject;
}
return WaitForMultiple( nObjects, pHandles, bWaitAll, dwTimeout );
#else
// TODO: Need a more efficient implementation of this.
uint32 dwStartTime = 0;
if ( dwTimeout != TT_INFINITE )
dwStartTime = Plat_MSTime();
// If bWaitAll = true, then we need to track which ones were triggered.
char *pWasTriggered = NULL;
int nTriggered = 0;
if ( bWaitAll )
{
pWasTriggered = (char*)stackalloc( nObjects );
memset( pWasTriggered, 0, nObjects );
}
while ( 1 )
{
for ( int i=0; i < nObjects; i++ )
{
if ( bWaitAll && pWasTriggered[i] )
continue;
#ifdef _PS3
Assert( !"Not implemented!" );
if ( false )
#else
if ( ppObjects[i]->Wait( 0 ) )
#endif
{
++nTriggered;
if ( bWaitAll )
{
if ( nTriggered == nObjects )
return 0;
else
pWasTriggered[i] = 1;
}
else
{
return i;
}
}
}
// Timeout?
if ( dwTimeout != TT_INFINITE )
{
if ( Plat_MSTime() - dwStartTime >= dwTimeout )
return TW_TIMEOUT;
}
ThreadSleep( 0 );
}
#endif
}
uint32 CThreadSyncObject::WaitForMultiple( int nObjects, CThreadSyncObject *pObjects, bool bWaitAll, uint32 dwTimeout )
{
#if defined(_WIN32 )
HANDLE *pHandles = (HANDLE*)stackalloc( sizeof(HANDLE) * nObjects );
for ( int i=0; i < nObjects; i++ )
{
pHandles[i] = pObjects[i].m_hSyncObject;
}
DWORD ret = WaitForMultipleObjects( nObjects, pHandles, bWaitAll, dwTimeout );
if ( ret == WAIT_TIMEOUT )
return TW_TIMEOUT;
else if ( ret >= WAIT_OBJECT_0 && (ret-WAIT_OBJECT_0) < (uint32)nObjects )
return (int)(ret - WAIT_OBJECT_0);
else if ( ret >= WAIT_ABANDONED_0 && (ret - WAIT_ABANDONED_0) < (uint32)nObjects )
Error( "Unhandled WAIT_ABANDONED in WaitForMultipleObjects" );
else if ( ret == WAIT_FAILED )
return TW_FAILED;
else
Error( "Unknown return value (%lu) from WaitForMultipleObjects", ret );