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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/usr/trace/daemonif.H $ */
/* */
/* IBM CONFIDENTIAL */
/* */
/* COPYRIGHT International Business Machines Corp. 2012 */
/* */
/* p1 */
/* */
/* Object Code Only (OCO) source materials */
/* Licensed Internal Code Source Materials */
/* IBM HostBoot Licensed Internal Code */
/* */
/* The source code for this program is not published or otherwise */
/* divested of its trade secrets, irrespective of what has been */
/* deposited with the U.S. Copyright Office. */
/* */
/* Origin: 30 */
/* */
/* IBM_PROLOG_END_TAG */
#ifndef __TRACE_DAEMON_H
#define __TRACE_DAEMON_H
#include <sys/msg.h>
#include <mbox/mbox_queues.H>
// Forward declaration of Daemon class.
namespace TRACEDAEMON { class Daemon; }
namespace TRACE
{
/** @class DaemonIf
*
* Defines the interface between the client (front-end) interfaces and
* the daemon.
*
* Since the daemon is in a separate extended module the client won't
* know when the daemon process is actually available. This small
* interface class is used to provide an abstraction in the base module
* for clients.
*
*/
class DaemonIf
{
public:
/** Default constructor.
*
* Initializes class and sets daemon as not-running.
*/
DaemonIf();
/** Default destructor.
*
* Ensures the daemon is shutdown if running.
*/
~DaemonIf();
/** Allows the client to signal the daemon that work is ready.
*
* @param[in] i_blocking - Indicates if this function should
* block until the daemon satisfies the
* request.
*/
void signal(bool i_blocking = false);
friend class BufferTest;
friend class TRACEDAEMON::Daemon;
private:
/** Queue to send messages to daemon on. */
msg_q_t iv_queue;
/** Indication if the daemon has already been signalled. */
uint16_t iv_signalled;
/** State of daemon process. */
bool iv_running;
enum MSG_TYPES
{
/** Client work is ready to be performed; flush buffers. */
TRACE_DAEMON_SIGNAL = MBOX::FIRST_SECURE_MSG | 0,
/** Daemon should shutdown. */
TRACE_DAEMON_SHUTDOWN = MBOX::FIRST_UNSECURE_MSG | 1,
};
// Since the below functions are only used by the daemon, they
// are only implemented in the daemon module.
/** Mark the daemon as 'running'. */
void start();
/** Block the daemon until a message is available. */
msg_t* wait() { return msg_wait(iv_queue); }
/** Clear the client signal. */
void clearSignal();
};
}
#endif
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