diff options
Diffstat (limited to '3rdparty/portaudio/test/patest_write_stop_hang_illegal.c')
| -rw-r--r-- | 3rdparty/portaudio/test/patest_write_stop_hang_illegal.c | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/3rdparty/portaudio/test/patest_write_stop_hang_illegal.c b/3rdparty/portaudio/test/patest_write_stop_hang_illegal.c new file mode 100644 index 0000000..3d53d4f --- /dev/null +++ b/3rdparty/portaudio/test/patest_write_stop_hang_illegal.c @@ -0,0 +1,168 @@ +/** @file patest_write_stop_threads.c + @brief Call Pa_StopStream() from another thread to see if PortAudio hangs. + @author Bjorn Roche of XO Audio (www.xoaudio.com) + @author Ross Bencina + @author Phil Burk +*/ +/* + * $Id$ + * + * This program uses the PortAudio Portable Audio Library. + * For more information see: http://www.portaudio.com/ + * Copyright (c) 1999-2000 Ross Bencina and Phil Burk + * + * 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. + */ + +#include <stdio.h> +#include <unistd.h> +#include <math.h> +#include <memory.h> +/* pthread may only be available on Mac and Linux. */ +#include <pthread.h> +#include "portaudio.h" + +#define SAMPLE_RATE (44100) +#define FRAMES_PER_BUFFER (2048) + +static float s_buffer[FRAMES_PER_BUFFER][2]; /* stereo output buffer */ + +/** + * WARNING: PortAudio is NOT thread safe. DO NOT call PortAudio + * from multiple threads without synchronization. This test uses + * PA in an ILLEGAL WAY in order to try to flush out potential hang bugs. + * The test calls Pa_WriteStream() and Pa_StopStream() simultaneously + * from separate threads in order to try to cause Pa_StopStream() to hang. + * In the main thread we write to the stream in a loop. + * Then try stopping PA from another thread to see if it hangs. + * + * @note: Do not expect this test to pass. The test is only here + * as a debugging aid for hang bugs. Since this test uses PA in an + * illegal way, it may fail for reasons that are not PA bugs. + */ + +/* Wait awhile then abort the stream. */ +void *stop_thread_proc(void *arg) +{ + PaStream *stream = (PaStream *)arg; + PaTime time; + for (int i = 0; i < 20; i++) + { + /* ILLEGAL unsynchronised call to PA, see comment above */ + time = Pa_GetStreamTime( stream ); + printf("Stream time = %f\n", time); + fflush(stdout); + usleep(100 * 1000); + } + printf("Call Pa_StopStream()\n"); + fflush(stdout); + /* ILLEGAL unsynchronised call to PA, see comment above */ + PaError err = Pa_StopStream( stream ); + printf("Pa_StopStream() returned %d\n", err); + fflush(stdout); + + return stream; +} + +int main(void); +int main(void) +{ + PaStreamParameters outputParameters; + PaStream *stream; + PaError err; + int result; + pthread_t thread; + + printf( "PortAudio Test: output silence and stop from another thread. SR = %d, BufSize = %d\n", + SAMPLE_RATE, FRAMES_PER_BUFFER); + + err = Pa_Initialize(); + if( err != paNoError ) goto error; + + outputParameters.device = Pa_GetDefaultOutputDevice(); /* default output device */ + outputParameters.channelCount = 2; /* stereo output */ + outputParameters.sampleFormat = paFloat32; /* 32 bit floating point output */ + outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultHighOutputLatency * 5; + outputParameters.hostApiSpecificStreamInfo = NULL; + + /* open the stream */ + err = Pa_OpenStream( + &stream, + NULL, /* no input */ + &outputParameters, + SAMPLE_RATE, + FRAMES_PER_BUFFER, + paClipOff, /* we won't output out of range samples so don't bother clipping them */ + NULL, /* no callback, use blocking API */ + NULL ); /* no callback, so no callback userData */ + if( err != paNoError ) goto error; + + result = pthread_create(&thread, NULL /* attributes */, stop_thread_proc, stream); + + /* start the stream */ + err = Pa_StartStream( stream ); + if( err != paNoError ) goto error; + + /* clear buffer */ + memset( s_buffer, 0, sizeof(s_buffer) ); + + /* play the silent buffer many times */ + while( Pa_IsStreamActive(stream) > 0 ) + { + err = Pa_WriteStream( stream, s_buffer, FRAMES_PER_BUFFER ); + printf("Pa_WriteStream returns %d = %s\n", err, Pa_GetErrorText( err )); + if( err != paNoError ) + { + err = paNoError; + break; + }; + } + + printf("Try to join the thread that called Pa_StopStream().\n"); + result = pthread_join( thread, NULL ); + printf("pthread_join returned %d\n", result); + + /* close, and terminate */ + printf("Call Pa_CloseStream\n"); + err = Pa_CloseStream( stream ); + if( err != paNoError ) goto error; + + Pa_Terminate(); + printf("Test finished.\n"); + + return err; +error: + Pa_Terminate(); + fprintf( stderr, "An error occurred while using the portaudio stream\n" ); + fprintf( stderr, "Error number: %d\n", err ); + fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) ); + return err; +} |