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// IBM_PROLOG_BEGIN_TAG
// This is an automatically generated prolog.
//
// $Source: src/usr/initservice/taskargs/taskargs.C $
//
// IBM CONFIDENTIAL
//
// COPYRIGHT International Business Machines Corp. 2011
//
// 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 other-
// wise divested of its trade secrets, irrespective of what has
// been deposited with the U.S. Copyright Office.
//
// Origin: 30
//
// IBM_PROLOG_END
/**
* @file taskargs.C
*
* common file to hold arguments passed onto tasks.
* will also hold macros, etc to manage arguments
*
* @note Notes on barrier:
* barrier_init() will initialize the barrier to the number of threads to
* wait on.
* "barrier_wait() function shall synchronize participating threads at
* the barrier referenced by barrier.
* The calling thread shall block until the required number of threads
* have called pthread_barrier_wait specifying the barrier."
*
* So in this case, the barrier is initialized to 2 (through barrier_init()
* in the constructor).
* When InitSvc launches the child, it calls barrier wait() (through
* waitChildSync() ) which adds 1 task to the "waitlist", blocks, and
* returns to InitSvc. InitSvc then calls waitParentSync() which adds
* its' task to the "waitlist". When the second task is added, both task
* are unblocked.
*
* The barrier is destroyed when TaskArgs goes out of scope by calling
* barrier_destroy() in the destructor.
*
*/
#include <initservice/taskargs.H>
namespace INITSERVICE
{
extern trace_desc_t *g_trac_initsvc;
void TaskArgs::waitParentSync( )
{
barrier_wait( &iv_sync_barrier);
}
void TaskArgs::waitChildSync( )
{
barrier_wait( &iv_sync_barrier);
}
void TaskArgs::postReturnCode( const uint64_t i_returncode )
{
iv_taskreturncode = i_returncode;
return;
}
uint64_t TaskArgs::getReturnCode( ) const
{
return iv_taskreturncode;
}
void TaskArgs::setCommand( const uint64_t i_command )
{
iv_taskcommand = i_command;
return;
}
uint64_t TaskArgs::getCommand( ) const
{
return iv_taskcommand;
}
void TaskArgs::postErrorLog( errlHndl_t i_errl )
{
iv_errl = i_errl;
}
errlHndl_t TaskArgs::getErrorLog( )
{
errlHndl_t l_errl = iv_errl;
// null out iv_errl after returning it to someone.
iv_errl = NULL;
return l_errl;
}
void TaskArgs::clear()
{
iv_taskreturncode = TASKARGS_UNDEFINED64; // init iv_returncode to undefined
iv_taskcommand = TASKARGS_UNDEFINED64; // init iv_command to undefined
// this should not happen, should have been handled by the caller(s)
// commit the errorlog here just to get rid of it
if ( iv_errl )
{
TRACFCOMP( g_trac_initsvc,
ERR_MRK "ERROR: errorlog %p was left in TaskArgs",
iv_errl );
errlCommit(iv_errl);
}
}
TaskArgs::TaskArgs()
: iv_errl( NULL ), // init errorlog handle to NULL
iv_taskreturncode(TASKARGS_UNDEFINED64), // init iv_returncode to undefined
iv_taskcommand(TASKARGS_UNDEFINED64) // init iv_command to undefined
{
// set barrier to wait for 2 tasks before releasing,
// see notes above.
barrier_init( &iv_sync_barrier, 2 );
}
TaskArgs::~TaskArgs()
{
clear();
barrier_destroy( &iv_sync_barrier );
// add an assert here to check if there is still an errorlog pending?
}
}; // namespace
|
