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Refactor shared memory (#6404)

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This commit is contained in:
Dominic Clark
2022-05-28 13:10:45 +01:00
committed by GitHub
parent 3518d307f4
commit 2c8ffd0f16
20 changed files with 529 additions and 397 deletions
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63
src/core/VstSyncController.cpp
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@@ -25,6 +25,8 @@
#include "VstSyncController.h"
#include <stdexcept>
#include <QDebug>
#include "AudioEngine.h"
@@ -32,53 +34,23 @@
#include "Engine.h"
#include "RemotePlugin.h"
#ifndef USE_QT_SHMEM
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#endif
VstSyncController::VstSyncController() :
m_syncData( nullptr ),
m_shmID( -1 ),
m_shm( "/usr/bin/lmms" )
m_syncData( nullptr )
{
if( ConfigManager::inst()->value( "ui", "syncvstplugins" ).toInt() )
{
connect( Engine::audioEngine(), SIGNAL( sampleRateChanged() ), this, SLOT( updateSampleRate() ) );
#ifdef USE_QT_SHMEM
if ( m_shm.create( sizeof( VstSyncData ) ) )
try
{
m_syncData = (VstSyncData*) m_shm.data();
m_shm.create("usr_bin_lmms");
m_syncData = m_shm.get();
}
else
catch (const std::runtime_error& error)
{
qWarning() << QString( "Failed to allocate shared memory for VST sync: %1" ).arg( m_shm.errorString() );
qWarning() << "Failed to allocate shared memory for VST sync:" << error.what();
}
#else
key_t key; // make the key:
if( ( key = ftok( VST_SNC_SHM_KEY_FILE, 'R' ) ) == -1 )
{
qWarning( "VstSyncController: ftok() failed" );
}
else
{ // connect to shared memory segment
if( ( m_shmID = shmget( key, sizeof( VstSyncData ), 0644 | IPC_CREAT ) ) == -1 )
{
qWarning( "VstSyncController: shmget() failed" );
}
else
{ // attach segment
m_syncData = (VstSyncData *)shmat( m_shmID, 0, 0 );
if( m_syncData == (VstSyncData *)( -1 ) )
{
qWarning( "VstSyncController: shmat() failed" );
}
}
}
#endif
}
else
{
@@ -111,25 +83,6 @@ VstSyncController::~VstSyncController()
{
delete m_syncData;
}
else
{
#ifdef USE_QT_SHMEM
if( m_shm.data() )
{
// detach shared memory, delete it:
m_shm.detach();
}
#else
if( shmdt( m_syncData ) != -1 )
{
shmctl( m_shmID, IPC_RMID, nullptr );
}
else
{
qWarning( "VstSyncController: shmdt() failed" );
}
#endif
}
}