void _PG_init()
{
if ( IS_PLJAVA_FOUND == initstage )
return; /* creating handler functions will cause recursive call */
pljavaCheckExtension( NULL);
initsequencer( initstage, true);
}
ASSIGNHOOK(enabled, bool)
{
ASSIGNRETURNIFCHECK(true);
pljavaEnabled = newval;
if ( IS_FORMLESS_VOID < initstage && initstage < IS_PLJAVA_ENABLED )
{
alteredSettingsWereNeeded = true;
ASSIGNRETURNIFNXACT(true);
initsequencer( initstage, true);
}
ASSIGNRETURN(true);
}
static Datum internalCallHandler(bool trusted, PG_FUNCTION_ARGS)
{
Invocation ctx;
Datum retval = 0;
if ( IS_COMPLETE != initstage )
{
/*
* Just in case it could be helpful in offering diagnostics later, hang
* on to an Oid that is known to refer to PL/Java (because it got here).
* It's cheap, and can be followed back to the right language and
* handler function entries later if needed.
*/
*(trusted ? &pljavaTrustedOid : &pljavaUntrustedOid)
= fcinfo->flinfo->fn_oid;
initsequencer( initstage, false);
/* Force initial setting
*/
s_currentTrust = !trusted;
}
Invocation_pushInvocation(&ctx, trusted);
PG_TRY();
{
Function function = Function_getFunction(fcinfo);
if(CALLED_AS_TRIGGER(fcinfo))
{
/* Called as a trigger procedure
*/
retval = Function_invokeTrigger(function, fcinfo);
}
else
{
/* Called as a function
*/
retval = Function_invoke(function, fcinfo);
}
Invocation_popInvocation(false);
}
PG_CATCH();
{
Invocation_popInvocation(true);
PG_RE_THROW();
}
PG_END_TRY();
return retval;
}
static Datum internalCallHandler(bool trusted, PG_FUNCTION_ARGS)
{
Invocation ctx;
Datum retval = 0;
#ifdef USE_PLJAVA_SIGHANDLERS
/*
* Substitute SIGUSR1 handler CatchupInterruptHandler with new local
* handler PLCatchupInterruptHandler, which will strictly let main
* thread of GPDB to process the signal rather than any other threads.
*
* Resolving possible lwlock releasing crash caused by SIGUSR1.
* MPP-23735
*/
if(!s_handlerSubstituted)
{
s_mainThreadIdForHandler = pthread_self();
s_oldHandlerFunc = pqsignal(SIGUSR1, PLCatchupInterruptHandler);
s_handlerSubstituted = true;
}
#endif
/*
* Just in case it could be helpful in offering diagnostics later, hang
* on to an Oid that is known to refer to PL/Java (because it got here).
* It's cheap, and can be followed back to the right language and
* handler function entries later if needed.
*/
*(trusted ? &pljavaTrustedOid : &pljavaUntrustedOid)
= fcinfo->flinfo->fn_oid;
if ( IS_COMPLETE != initstage )
{
initsequencer( initstage, false);
/* Force initial setting
*/
s_currentTrust = !trusted;
}
Invocation_pushInvocation(&ctx, trusted);
PG_TRY();
{
Function function = Function_getFunction(fcinfo);
if(CALLED_AS_TRIGGER(fcinfo))
{
/* Called as a trigger procedure
*/
retval = Function_invokeTrigger(function, fcinfo);
}
else
{
/* Called as a function
*/
retval = Function_invoke(function, fcinfo);
}
Invocation_popInvocation(false);
}
PG_CATCH();
{
Invocation_popInvocation(true);
PG_RE_THROW();
}
PG_END_TRY();
return retval;
}
