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ChannelProviderFactory, eget support for it

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This commit is contained in:
Matej Sekoranja
2013-06-04 00:32:58 +02:00
parent d9eda7d908
commit a20dd07b85
17 changed files with 372 additions and 62 deletions
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pvAccessApp/pva/clientFactory.cpp
+70 -20
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@@ -16,35 +16,85 @@ using namespace epics::pvData;
using namespace epics::pvAccess;
// TODO global static variable (de/initialization order not guaranteed)
static Mutex m_mutex;
static ClientContextImpl::shared_pointer m_context;
static Mutex mutex;
static ClientContextImpl::shared_pointer context;
class ChannelProviderFactoryImpl : public ChannelProviderFactory
{
public:
POINTER_DEFINITIONS(ChannelProviderFactoryImpl);
virtual epics::pvData::String getFactoryName()
{
return ClientContextImpl::PROVIDER_NAME;
}
virtual ChannelProvider::shared_pointer sharedInstance()
{
Lock guard(mutex);
if (!context.get())
{
try {
ClientContextImpl::shared_pointer lcontext = createClientContextImpl();
lcontext->initialize();
context = lcontext;
} catch (std::exception &e) {
LOG(logLevelError, "Unhandled exception caught at %s:%d: %s", __FILE__, __LINE__, e.what());
} catch (...) {
LOG(logLevelError, "Unhandled exception caught at %s:%d.", __FILE__, __LINE__);
}
}
return context->getProvider();
}
virtual ChannelProvider::shared_pointer newInstance()
{
Lock guard(mutex);
try {
ClientContextImpl::shared_pointer lcontext = createClientContextImpl();
lcontext->initialize();
return lcontext->getProvider();
} catch (std::exception &e) {
LOG(logLevelError, "Unhandled exception caught at %s:%d: %s", __FILE__, __LINE__, e.what());
return ChannelProvider::shared_pointer();
} catch (...) {
LOG(logLevelError, "Unhandled exception caught at %s:%d.", __FILE__, __LINE__);
return ChannelProvider::shared_pointer();
}
}
void destroySharedInstance()
{
Lock guard(mutex);
if (context.get())
{
context->dispose();
context.reset();
}
}
};
static ChannelProviderFactoryImpl::shared_pointer factory;
void ClientFactory::start()
{
epicsSignalInstallSigAlarmIgnore();
epicsSignalInstallSigPipeIgnore();
Lock guard(m_mutex);
if (m_context.get()) return;
try {
m_context = createClientContextImpl();
m_context->initialize();
registerChannelProvider(m_context->getProvider());
} catch (std::exception &e) {
LOG(logLevelError, "Unhandled exception caught at %s:%d: %s", __FILE__, __LINE__, e.what());
} catch (...) {
LOG(logLevelError, "Unhandled exception caught at %s:%d.", __FILE__, __LINE__);
}
Lock guard(mutex);
if (!factory.get())
factory.reset(new ChannelProviderFactoryImpl());
registerChannelProviderFactory(factory);
}
void ClientFactory::stop()
{
Lock guard(m_mutex);
if (!m_context.get()) return;
Lock guard(mutex);
unregisterChannelProvider(m_context->getProvider());
m_context->dispose();
m_context.reset();
if (factory.get())
{
unregisterChannelProviderFactory(factory);
factory->destroySharedInstance();
}
}