1 files changed, 0 insertions, 710 deletions
diff --git a/portaudio/src/os/unix/pa_unix_util.c b/portaudio/src/os/unix/pa_unix_util.c
deleted file mode 100644
index 459b2be..0000000
--- a/portaudio/src/os/unix/pa_unix_util.c
+++ /dev/null
@@ -1,710 +0,0 @@
-/*
- * $Id$
- * Portable Audio I/O Library
- * UNIX platform-specific support functions
- *
- * Based on the Open Source API proposed by Ross Bencina
- * Copyright (c) 1999-2000 Ross Bencina
- *
- * Permission is hereby granted, free of charge, to any person obtaining
- * a copy of this software and associated documentation files
- * (the "Software"), to deal in the Software without restriction,
- * including without limitation the rights to use, copy, modify, merge,
- * publish, distribute, sublicense, and/or sell copies of the Software,
- * and to permit persons to whom the Software is furnished to do so,
- * subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be
- * included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
- * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
- * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
- * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
- * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-/*
- * The text above constitutes the entire PortAudio license; however,
- * the PortAudio community also makes the following non-binding requests:
- *
- * Any person wishing to distribute modifications to the Software is
- * requested to send the modifications to the original developer so that
- * they can be incorporated into the canonical version. It is also
- * requested that these non-binding requests be included along with the
- * license above.
- */
-
-/** @file
- @ingroup unix_src
-*/
-
-#include <pthread.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <time.h>
-#include <sys/time.h>
-#include <assert.h>
-#include <string.h> /* For memset */
-#include <math.h>
-#include <errno.h>
-
-#if defined(__APPLE__) && !defined(HAVE_MACH_ABSOLUTE_TIME)
-#define HAVE_MACH_ABSOLUTE_TIME
-#endif
-#ifdef HAVE_MACH_ABSOLUTE_TIME
-#include <mach/mach_time.h>
-#endif
-
-#include "pa_util.h"
-#include "pa_unix_util.h"
-#include "pa_debugprint.h"
-
-/*
-   Track memory allocations to avoid leaks.
- */
-
-#if PA_TRACK_MEMORY
-static int numAllocations_ = 0;
-#endif
-
-
-void *PaUtil_AllocateMemory( long size )
-{
-    void *result = malloc( size );
-
-#if PA_TRACK_MEMORY
-    if( result != NULL ) numAllocations_ += 1;
-#endif
-    return result;
-}
-
-
-void PaUtil_FreeMemory( void *block )
-{
-    if( block != NULL )
-    {
-        free( block );
-#if PA_TRACK_MEMORY
-        numAllocations_ -= 1;
-#endif
-
-    }
-}
-
-
-int PaUtil_CountCurrentlyAllocatedBlocks( void )
-{
-#if PA_TRACK_MEMORY
-    return numAllocations_;
-#else
-    return 0;
-#endif
-}
-
-
-void Pa_Sleep( long msec )
-{
-#ifdef HAVE_NANOSLEEP
-    struct timespec req = {0}, rem = {0};
-    PaTime time = msec / 1.e3;
-    req.tv_sec = (time_t)time;
-    assert(time - req.tv_sec < 1.0);
-    req.tv_nsec = (long)((time - req.tv_sec) * 1.e9);
-    nanosleep(&req, &rem);
-    /* XXX: Try sleeping the remaining time (contained in rem) if interrupted by a signal? */
-#else
-    while( msec > 999 )     /* For OpenBSD and IRIX, argument */
-        {                   /* to usleep must be < 1000000.   */
-        usleep( 999000 );
-        msec -= 999;
-        }
-    usleep( msec * 1000 );
-#endif
-}
-
-#ifdef HAVE_MACH_ABSOLUTE_TIME
-/*
-    Discussion on the CoreAudio mailing list suggests that calling
-    gettimeofday (or anything else in the BSD layer) is not real-time
-    safe, so we use mach_absolute_time on OSX. This implementation is
-    based on these two links:
-
-    Technical Q&A QA1398 - Mach Absolute Time Units
-    http://developer.apple.com/mac/library/qa/qa2004/qa1398.html
-
-    Tutorial: Performance and Time.
-    http://www.macresearch.org/tutorial_performance_and_time
-*/
-
-/* Scaler to convert the result of mach_absolute_time to seconds */
-static double machSecondsConversionScaler_ = 0.0;
-#endif
-
-void PaUtil_InitializeClock( void )
-{
-#ifdef HAVE_MACH_ABSOLUTE_TIME
-    mach_timebase_info_data_t info;
-    kern_return_t err = mach_timebase_info( &info );
-    if( err == 0  )
-        machSecondsConversionScaler_ = 1e-9 * (double) info.numer / (double) info.denom;
-#endif
-}
-
-
-PaTime PaUtil_GetTime( void )
-{
-#ifdef HAVE_MACH_ABSOLUTE_TIME
-    return mach_absolute_time() * machSecondsConversionScaler_;
-#elif defined(HAVE_CLOCK_GETTIME)
-    struct timespec tp;
-    clock_gettime(CLOCK_REALTIME, &tp);
-    return (PaTime)(tp.tv_sec + tp.tv_nsec * 1e-9);
-#else
-    struct timeval tv;
-    gettimeofday( &tv, NULL );
-    return (PaTime) tv.tv_usec * 1e-6 + tv.tv_sec;
-#endif
-}
-
-PaError PaUtil_InitializeThreading( PaUtilThreading *threading )
-{
-    (void) paUtilErr_;
-    return paNoError;
-}
-
-void PaUtil_TerminateThreading( PaUtilThreading *threading )
-{
-}
-
-PaError PaUtil_StartThreading( PaUtilThreading *threading, void *(*threadRoutine)(void *), void *data )
-{
-    pthread_create( &threading->callbackThread, NULL, threadRoutine, data );
-    return paNoError;
-}
-
-PaError PaUtil_CancelThreading( PaUtilThreading *threading, int wait, PaError *exitResult )
-{
-    PaError result = paNoError;
-    void *pret;
-
-    if( exitResult )
-        *exitResult = paNoError;
-
-    /* If pthread_cancel is not supported (Android platform) whole this function can lead to indefinite waiting if
-       working thread (callbackThread) has'n received any stop signals from outside, please keep
-       this in mind when considering using PaUtil_CancelThreading
-    */
-#ifdef PTHREAD_CANCELED
-    /* Only kill the thread if it isn't in the process of stopping (flushing adaptation buffers) */
-    if( !wait )
-        pthread_cancel( threading->callbackThread );   /* XXX: Safe to call this if the thread has exited on its own? */
-#endif
-    pthread_join( threading->callbackThread, &pret );
-
-#ifdef PTHREAD_CANCELED
-    if( pret && PTHREAD_CANCELED != pret )
-#else
-    /* !wait means the thread may have been canceled */
-    if( pret && wait )
-#endif
-    {
-        if( exitResult )
-            *exitResult = *(PaError *) pret;
-        free( pret );
-    }
-
-    return result;
-}
-
-/* Threading */
-/* paUnixMainThread
- * We have to be a bit careful with defining this global variable,
- * as explained below. */
-#ifdef __APPLE__
-/* apple/gcc has a "problem" with global vars and dynamic libs.
-   Initializing it seems to fix the problem.
-   Described a bit in this thread:
-   http://gcc.gnu.org/ml/gcc/2005-06/msg00179.html
-*/
-pthread_t paUnixMainThread = 0;
-#else
-/*pthreads are opaque. We don't know that assigning it an int value
-  always makes sense, so we don't initialize it unless we have to.*/
-pthread_t paUnixMainThread = 0;
-#endif
-
-PaError PaUnixThreading_Initialize( void )
-{
-    paUnixMainThread = pthread_self();
-    return paNoError;
-}
-
-static PaError BoostPriority( PaUnixThread* self )
-{
-    PaError result = paNoError;
-    struct sched_param spm = { 0 };
-    /* Priority should only matter between contending FIFO threads? */
-    spm.sched_priority = 1;
-
-    assert( self );
-
-    if( pthread_setschedparam( self->thread, SCHED_FIFO, &spm ) != 0 )
-    {
-        PA_UNLESS( errno == EPERM, paInternalError );  /* Lack permission to raise priority */
-        PA_DEBUG(( "Failed bumping priority\n" ));
-        result = 0;
-    }
-    else
-    {
-        result = 1; /* Success */
-    }
-error:
-    return result;
-}
-
-PaError PaUnixThread_New( PaUnixThread* self, void* (*threadFunc)( void* ), void* threadArg, PaTime waitForChild,
-        int rtSched )
-{
-    PaError result = paNoError;
-    pthread_attr_t attr;
-    int started = 0;
-
-    memset( self, 0, sizeof (PaUnixThread) );
-    PaUnixMutex_Initialize( &self->mtx );
-    PA_ASSERT_CALL( pthread_cond_init( &self->cond, NULL ), 0 );
-
-    self->parentWaiting = 0 != waitForChild;
-
-    /* Spawn thread */
-
-/* Temporarily disabled since we should test during configuration for presence of required mman.h header */
-#if 0
-#if defined _POSIX_MEMLOCK && (_POSIX_MEMLOCK != -1)
-    if( rtSched )
-    {
-        if( mlockall( MCL_CURRENT | MCL_FUTURE ) < 0 )
-        {
-            int savedErrno = errno;             /* In case errno gets overwritten */
-            assert( savedErrno != EINVAL );     /* Most likely a programmer error */
-            PA_UNLESS( (savedErrno == EPERM), paInternalError );
-            PA_DEBUG(( "%s: Failed locking memory\n", __FUNCTION__ ));
-        }
-        else
-            PA_DEBUG(( "%s: Successfully locked memory\n", __FUNCTION__ ));
-    }
-#endif
-#endif
-
-    PA_UNLESS( !pthread_attr_init( &attr ), paInternalError );
-    /* Priority relative to other processes */
-    PA_UNLESS( !pthread_attr_setscope( &attr, PTHREAD_SCOPE_SYSTEM ), paInternalError );
-
-    PA_UNLESS( !pthread_create( &self->thread, &attr, threadFunc, threadArg ), paInternalError );
-    started = 1;
-
-    if( rtSched )
-    {
-#if 0
-        if( self->useWatchdog )
-        {
-            int err;
-            struct sched_param wdSpm = { 0 };
-            /* Launch watchdog, watchdog sets callback thread priority */
-            int prio = PA_MIN( self->rtPrio + 4, sched_get_priority_max( SCHED_FIFO ) );
-            wdSpm.sched_priority = prio;
-
-            PA_UNLESS( !pthread_attr_init( &attr ), paInternalError );
-            PA_UNLESS( !pthread_attr_setinheritsched( &attr, PTHREAD_EXPLICIT_SCHED ), paInternalError );
-            PA_UNLESS( !pthread_attr_setscope( &attr, PTHREAD_SCOPE_SYSTEM ), paInternalError );
-            PA_UNLESS( !pthread_attr_setschedpolicy( &attr, SCHED_FIFO ), paInternalError );
-            PA_UNLESS( !pthread_attr_setschedparam( &attr, &wdSpm ), paInternalError );
-            if( (err = pthread_create( &self->watchdogThread, &attr, &WatchdogFunc, self )) )
-            {
-                PA_UNLESS( err == EPERM, paInternalError );
-                /* Permission error, go on without realtime privileges */
-                PA_DEBUG(( "Failed bumping priority\n" ));
-            }
-            else
-            {
-                int policy;
-                self->watchdogRunning = 1;
-                PA_ENSURE_SYSTEM( pthread_getschedparam( self->watchdogThread, &policy, &wdSpm ), 0 );
-                /* Check if priority is right, policy could potentially differ from SCHED_FIFO (but that's alright) */
-                if( wdSpm.sched_priority != prio )
-                {
-                    PA_DEBUG(( "Watchdog priority not set correctly (%d)\n", wdSpm.sched_priority ));
-                    PA_ENSURE( paInternalError );
-                }
-            }
-        }
-        else
-#endif
-            PA_ENSURE( BoostPriority( self ) );
-
-        {
-            int policy;
-            struct sched_param spm;
-            pthread_getschedparam(self->thread, &policy, &spm);
-        }
-    }
-
-    if( self->parentWaiting )
-    {
-        PaTime till;
-        struct timespec ts;
-        int res = 0;
-        PaTime now;
-
-        PA_ENSURE( PaUnixMutex_Lock( &self->mtx ) );
-
-        /* Wait for stream to be started */
-        now = PaUtil_GetTime();
-        till = now + waitForChild;
-
-        while( self->parentWaiting && !res )
-        {
-            if( waitForChild > 0 )
-            {
-                ts.tv_sec = (time_t) floor( till );
-                ts.tv_nsec = (long) ((till - floor( till )) * 1e9);
-                res = pthread_cond_timedwait( &self->cond, &self->mtx.mtx, &ts );
-            }
-            else
-            {
-                res = pthread_cond_wait( &self->cond, &self->mtx.mtx );
-            }
-        }
-
-        PA_ENSURE( PaUnixMutex_Unlock( &self->mtx ) );
-
-        PA_UNLESS( !res || ETIMEDOUT == res, paInternalError );
-        PA_DEBUG(( "%s: Waited for %g seconds for stream to start\n", __FUNCTION__, PaUtil_GetTime() - now ));
-        if( ETIMEDOUT == res )
-        {
-            PA_ENSURE( paTimedOut );
-        }
-    }
-
-end:
-    return result;
-error:
-    if( started )
-    {
-        PaUnixThread_Terminate( self, 0, NULL );
-    }
-
-    goto end;
-}
-
-PaError PaUnixThread_Terminate( PaUnixThread* self, int wait, PaError* exitResult )
-{
-    PaError result = paNoError;
-    void* pret;
-
-    if( exitResult )
-    {
-        *exitResult = paNoError;
-    }
-#if 0
-    if( watchdogExitResult )
-        *watchdogExitResult = paNoError;
-
-    if( th->watchdogRunning )
-    {
-        pthread_cancel( th->watchdogThread );
-        PA_ENSURE_SYSTEM( pthread_join( th->watchdogThread, &pret ), 0 );
-
-        if( pret && pret != PTHREAD_CANCELED )
-        {
-            if( watchdogExitResult )
-                *watchdogExitResult = *(PaError *) pret;
-            free( pret );
-        }
-    }
-#endif
-
-    /* Only kill the thread if it isn't in the process of stopping (flushing adaptation buffers) */
-    /* TODO: Make join time out */
-    self->stopRequested = wait;
-    if( !wait )
-    {
-        PA_DEBUG(( "%s: Canceling thread %d\n", __FUNCTION__, self->thread ));
-        /* XXX: Safe to call this if the thread has exited on its own? */
-#ifdef PTHREAD_CANCELED
-        pthread_cancel( self->thread );
-#endif
-    }
-    PA_DEBUG(( "%s: Joining thread %d\n", __FUNCTION__, self->thread ));
-    PA_ENSURE_SYSTEM( pthread_join( self->thread, &pret ), 0 );
-
-#ifdef PTHREAD_CANCELED
-    if( pret && PTHREAD_CANCELED != pret )
-#else
-    /* !wait means the thread may have been canceled */
-    if( pret && wait )
-#endif
-    {
-        if( exitResult )
-        {
-            *exitResult = *(PaError*)pret;
-        }
-        free( pret );
-    }
-
-error:
-    PA_ASSERT_CALL( PaUnixMutex_Terminate( &self->mtx ), paNoError );
-    PA_ASSERT_CALL( pthread_cond_destroy( &self->cond ), 0 );
-
-    return result;
-}
-
-PaError PaUnixThread_PrepareNotify( PaUnixThread* self )
-{
-    PaError result = paNoError;
-    PA_UNLESS( self->parentWaiting, paInternalError );
-
-    PA_ENSURE( PaUnixMutex_Lock( &self->mtx ) );
-    self->locked = 1;
-
-error:
-    return result;
-}
-
-PaError PaUnixThread_NotifyParent( PaUnixThread* self )
-{
-    PaError result = paNoError;
-    PA_UNLESS( self->parentWaiting, paInternalError );
-
-    if( !self->locked )
-    {
-        PA_ENSURE( PaUnixMutex_Lock( &self->mtx ) );
-        self->locked = 1;
-    }
-    self->parentWaiting = 0;
-    pthread_cond_signal( &self->cond );
-    PA_ENSURE( PaUnixMutex_Unlock( &self->mtx ) );
-    self->locked = 0;
-
-error:
-    return result;
-}
-
-int PaUnixThread_StopRequested( PaUnixThread* self )
-{
-    return self->stopRequested;
-}
-
-PaError PaUnixMutex_Initialize( PaUnixMutex* self )
-{
-    PaError result = paNoError;
-    PA_ASSERT_CALL( pthread_mutex_init( &self->mtx, NULL ), 0 );
-    return result;
-}
-
-PaError PaUnixMutex_Terminate( PaUnixMutex* self )
-{
-    PaError result = paNoError;
-    PA_ASSERT_CALL( pthread_mutex_destroy( &self->mtx ), 0 );
-    return result;
-}
-
-/** Lock mutex.
- *
- * We're disabling thread cancellation while the thread is holding a lock, so mutexes are
- * properly unlocked at termination time.
- */
-PaError PaUnixMutex_Lock( PaUnixMutex* self )
-{
-    PaError result = paNoError;
-
-#ifdef PTHREAD_CANCEL
-    int oldState;
-    PA_ENSURE_SYSTEM( pthread_setcancelstate( PTHREAD_CANCEL_DISABLE, &oldState ), 0 );
-#endif
-    PA_ENSURE_SYSTEM( pthread_mutex_lock( &self->mtx ), 0 );
-
-error:
-    return result;
-}
-
-/** Unlock mutex.
- *
- * Thread cancellation is enabled again after the mutex is properly unlocked.
- */
-PaError PaUnixMutex_Unlock( PaUnixMutex* self )
-{
-    PaError result = paNoError;
-
-    PA_ENSURE_SYSTEM( pthread_mutex_unlock( &self->mtx ), 0 );
-#ifdef PTHREAD_CANCEL
-    int oldState;
-    PA_ENSURE_SYSTEM( pthread_setcancelstate( PTHREAD_CANCEL_ENABLE, &oldState ), 0 );
-#endif
-
-error:
-    return result;
-}
-
-
-#if 0
-static void OnWatchdogExit( void *userData )
-{
-    PaAlsaThreading *th = (PaAlsaThreading *) userData;
-    struct sched_param spm = { 0 };
-    assert( th );
-
-    PA_ASSERT_CALL( pthread_setschedparam( th->callbackThread, SCHED_OTHER, &spm ), 0 );    /* Lower before exiting */
-    PA_DEBUG(( "Watchdog exiting\n" ));
-}
-
-static void *WatchdogFunc( void *userData )
-{
-    PaError result = paNoError, *pres = NULL;
-    int err;
-    PaAlsaThreading *th = (PaAlsaThreading *) userData;
-    unsigned intervalMsec = 500;
-    const PaTime maxSeconds = 3.;   /* Max seconds between callbacks */
-    PaTime timeThen = PaUtil_GetTime(), timeNow, timeElapsed, cpuTimeThen, cpuTimeNow, cpuTimeElapsed;
-    double cpuLoad, avgCpuLoad = 0.;
-    int throttled = 0;
-
-    assert( th );
-
-    /* Execute OnWatchdogExit when exiting */
-    pthread_cleanup_push( &OnWatchdogExit, th );
-
-    /* Boost priority of callback thread */
-    PA_ENSURE( result = BoostPriority( th ) );
-    if( !result )
-    {
-        /* Boost failed, might as well exit */
-        pthread_exit( NULL );
-    }
-
-    cpuTimeThen = th->callbackCpuTime;
-    {
-        int policy;
-        struct sched_param spm = { 0 };
-        pthread_getschedparam( pthread_self(), &policy, &spm );
-        PA_DEBUG(( "%s: Watchdog priority is %d\n", __FUNCTION__, spm.sched_priority ));
-    }
-
-    while( 1 )
-    {
-        double lowpassCoeff = 0.9, lowpassCoeff1 = 0.99999 - lowpassCoeff;
-
-        /* Test before and after in case whatever underlying sleep call isn't interrupted by pthread_cancel */
-        pthread_testcancel();
-        Pa_Sleep( intervalMsec );
-        pthread_testcancel();
-
-        if( PaUtil_GetTime() - th->callbackTime > maxSeconds )
-        {
-            PA_DEBUG(( "Watchdog: Terminating callback thread\n" ));
-            /* Tell thread to terminate */
-            err = pthread_kill( th->callbackThread, SIGKILL );
-            pthread_exit( NULL );
-        }
-
-        PA_DEBUG(( "%s: PortAudio reports CPU load: %g\n", __FUNCTION__, PaUtil_GetCpuLoad( th->cpuLoadMeasurer ) ));
-
-        /* Check if we should throttle, or unthrottle :P */
-        cpuTimeNow = th->callbackCpuTime;
-        cpuTimeElapsed = cpuTimeNow - cpuTimeThen;
-        cpuTimeThen = cpuTimeNow;
-
-        timeNow = PaUtil_GetTime();
-        timeElapsed = timeNow - timeThen;
-        timeThen = timeNow;
-        cpuLoad = cpuTimeElapsed / timeElapsed;
-        avgCpuLoad = avgCpuLoad * lowpassCoeff + cpuLoad * lowpassCoeff1;
-        /*
-        if( throttled )
-            PA_DEBUG(( "Watchdog: CPU load: %g, %g\n", avgCpuLoad, cpuTimeElapsed ));
-            */
-        if( PaUtil_GetCpuLoad( th->cpuLoadMeasurer ) > .925 )
-        {
-            static int policy;
-            static struct sched_param spm = { 0 };
-            static const struct sched_param defaultSpm = { 0 };
-            PA_DEBUG(( "%s: Throttling audio thread, priority %d\n", __FUNCTION__, spm.sched_priority ));
-
-            pthread_getschedparam( th->callbackThread, &policy, &spm );
-            if( !pthread_setschedparam( th->callbackThread, SCHED_OTHER, &defaultSpm ) )
-            {
-                throttled = 1;
-            }
-            else
-                PA_DEBUG(( "Watchdog: Couldn't lower priority of audio thread: %s\n", strerror( errno ) ));
-
-            /* Give other processes a go, before raising priority again */
-            PA_DEBUG(( "%s: Watchdog sleeping for %lu msecs before unthrottling\n", __FUNCTION__, th->throttledSleepTime ));
-            Pa_Sleep( th->throttledSleepTime );
-
-            /* Reset callback priority */
-            if( pthread_setschedparam( th->callbackThread, SCHED_FIFO, &spm ) != 0 )
-            {
-                PA_DEBUG(( "%s: Couldn't raise priority of audio thread: %s\n", __FUNCTION__, strerror( errno ) ));
-            }
-
-            if( PaUtil_GetCpuLoad( th->cpuLoadMeasurer ) >= .99 )
-                intervalMsec = 50;
-            else
-                intervalMsec = 100;
-
-            /*
-            lowpassCoeff = .97;
-            lowpassCoeff1 = .99999 - lowpassCoeff;
-            */
-        }
-        else if( throttled && avgCpuLoad < .8 )
-        {
-            intervalMsec = 500;
-            throttled = 0;
-
-            /*
-            lowpassCoeff = .9;
-            lowpassCoeff1 = .99999 - lowpassCoeff;
-            */
-        }
-    }
-
-    pthread_cleanup_pop( 1 );   /* Execute cleanup on exit */
-
-error:
-    /* Shouldn't get here in the normal case */
-
-    /* Pass on error code */
-    pres = malloc( sizeof (PaError) );
-    *pres = result;
-
-    pthread_exit( pres );
-}
-
-static void CallbackUpdate( PaAlsaThreading *th )
-{
-    th->callbackTime = PaUtil_GetTime();
-    th->callbackCpuTime = PaUtil_GetCpuLoad( th->cpuLoadMeasurer );
-}
-
-/*
-static void *CanaryFunc( void *userData )
-{
-    const unsigned intervalMsec = 1000;
-    PaUtilThreading *th = (PaUtilThreading *) userData;
-
-    while( 1 )
-    {
-        th->canaryTime = PaUtil_GetTime();
-
-        pthread_testcancel();
-        Pa_Sleep( intervalMsec );
-    }
-
-    pthread_exit( NULL );
-}
-*/
-#endif