/****************************************************************
 *								*
 *	Copyright 2001, 2012 Fidelity Information Services, Inc	*
 *								*
 *	This source code contains the intellectual property	*
 *	of its copyright holder(s), and is made available	*
 *	under a license.  If you do not know the terms of	*
 *	the license, please stop and do not read further.	*
 *								*
 ****************************************************************/

#include <mdef.h>

#include <signal.h>
#include "gtm_syslog.h"
#include "gtm_limits.h"

#include "gtmsiginfo.h"
#include "io.h"
#include "send_msg.h"
#include "setterm.h"
#include "continue_handler.h"
#include "gtmsecshr.h"

GBLREF volatile int	suspend_status;
GBLREF io_pair		io_std_device;
GBLREF pid_t		process_id;

error_def(ERR_REQ2RESUME);

void continue_handler(int sig, siginfo_t *info, void *context)
{
	gtmsiginfo_t	sig_info;
	DCL_THREADGBL_ACCESS;

	SETUP_THREADGBL_ACCESS;
	/* Count how many times we get a continue-process signal (in DEBUG) */
	DEBUG_ONLY(DBGGSSHR((LOGFLAGS, "continue_handler: pid %d, continue_proc_cnt bumped from %d to %d\n",
			     process_id, TREF(continue_proc_cnt), TREF(continue_proc_cnt) + 1)));
	DEBUG_ONLY((TREF(continue_proc_cnt))++);
 	assert(SIGCONT == sig);
	extract_signal_info(sig, info, context, &sig_info);
	switch(suspend_status)
	{
		case NOW_SUSPEND:
			/* Don't bother checking if user info is available. If info isn't available,
			 * the value zero will be printed for pid and uid. Note that the following
			 * message was previously put out even when the process was not suspended but
			 * with the changes in spin locks that send continue messages "just in case",
			 * I thought it better to restrict this message to when the process was actually
			 * suspended and being continued. SE 7/01
			 */
			send_msg(VARLSTCNT(4) ERR_REQ2RESUME, 2, sig_info.send_pid, sig_info.send_uid);
			if (NULL != io_std_device.in && tt == io_std_device.in->type)
				setterm(io_std_device.in);
			/* Fall through */
		case DEFER_SUSPEND:
			/* If suspend was deferred, this continue/resume overrides/cancels it */
			suspend_status = NO_SUSPEND;
			break;
	}
}