Add JackWaitCallbackDriver
This wrapper driver has the same usage as its parent JackWaitThreadedDriver, but for non-threaded (callback) drivers. After waiting for Initialize to return, its main thread simply ends instead of calling the driver's Process method in a loop. The decorated driver, which must extends JackRestarerDriver instead of JackWaiterDriver, can restart the wait cycle by calling its RestartWait method.
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parent
c1ae33f934
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@ -86,4 +86,18 @@ int JackWaiterDriver::ProcessNull()
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return 0;
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}
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void JackRestarterDriver::SetRestartDriver(JackDriver* driver)
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{
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fRestartDriver = driver;
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}
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int JackRestarterDriver::RestartWait()
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{
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if (!fRestartDriver) {
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jack_error("JackRestartedDriver::RestartWait driver not set");
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return -1;
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}
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return fRestartDriver->Start();
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}
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} // end of namespace
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@ -75,6 +75,32 @@ class SERVER_EXPORT JackWaiterDriver : public JackTimedDriver
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};
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/*!
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\brief A restartable driver.
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When wrapped into a JackWaitCallbackDriver, this driver can restart the
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wrapper thread which will wait again for the Initialize method to return.
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*/
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class SERVER_EXPORT JackRestarterDriver : public JackWaiterDriver
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{
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private:
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JackDriver* fRestartDriver; /*!< The wrapper driver */
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public:
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JackRestarterDriver(const char* name, const char* alias, JackLockedEngine* engine, JackSynchro* table)
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: JackWaiterDriver(name, alias, engine, table), fRestartDriver(NULL)
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{}
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virtual ~JackRestarterDriver()
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{}
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void SetRestartDriver(JackDriver* driver); /*!< Let the wrapper register itself */
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int RestartWait(); /*!< Restart the wrapper thread */
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};
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} // end of namespace
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#endif
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@ -0,0 +1,39 @@
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/*
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Copyright (C) 2014 Cédric Schieli
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "JackWaitCallbackDriver.h"
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namespace Jack
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{
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JackWaitCallbackDriver::JackWaitCallbackDriver(JackRestarterDriver* driver)
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: JackWaitThreadedDriver(driver)
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{
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// Self register with the decorated driver so it can restart us
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assert(driver);
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driver->SetRestartDriver((JackDriver*)this);
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}
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bool JackWaitCallbackDriver::ExecuteReal()
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{
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// End the thread and let the callback driver do its job
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return false;
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}
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} // end of namespace
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@ -0,0 +1,50 @@
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/*
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Copyright (C) 2014 Cédric Schieli
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifndef __JackWaitCallbackDriver__
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#define __JackWaitCallbackDriver__
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#include "JackWaitThreadedDriver.h"
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namespace Jack
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{
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/*!
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\brief Wrapper for a restartable non-threaded driver (e.g. JackProxyDriver).
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Simply ends its thread when the decorated driver Initialize method returns.
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Self register with the supplied JackRestarterDriver so it can restart the thread.
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*/
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class SERVER_EXPORT JackWaitCallbackDriver : public JackWaitThreadedDriver
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{
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public:
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JackWaitCallbackDriver(JackRestarterDriver* driver);
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protected:
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bool ExecuteReal();
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};
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} // end of namespace
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#endif
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@ -223,6 +223,7 @@ def build(bld):
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'JackThreadedDriver.cpp',
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'JackRestartThreadedDriver.cpp',
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'JackWaitThreadedDriver.cpp',
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'JackWaitCallbackDriver.cpp',
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'JackServerAPI.cpp',
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'JackDriverLoader.cpp',
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'JackServerGlobals.cpp',
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