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/****************************************************************************
**
** Copyright (C) 2014 Digia Plc
** All rights reserved.
** For any questions to Digia, please use the contact form at
** http://www.qt.io
**
** This file is part of Qt Enterprise Embedded.
**
** Licensees holding valid Qt Enterprise licenses may use this file in
** accordance with the Qt Enterprise License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.
**
** If you have questions regarding the use of this file, please use
** the contact form at http://www.qt.io
**
****************************************************************************/
#include "schedulingpolicyservice.h"
#include <binder/IServiceManager.h>
#include <binder/IPCThreadState.h>
#include <cutils/sched_policy.h>
#include <sched.h>
using namespace android;
enum {
REQUEST_PRIORITY_TRANSACTION = IBinder::FIRST_CALL_TRANSACTION
};
#define PRIORITY_MIN 1
#define PRIORITY_MAX 3
SchedulingPolicyService::SchedulingPolicyService()
{
}
void SchedulingPolicyService::instantiate()
{
defaultServiceManager()->addService(String16("scheduling_policy"), new SchedulingPolicyService);
}
status_t SchedulingPolicyService::onTransact(uint32_t code, const Parcel &data, Parcel *reply, uint32_t flags)
{
switch (code) {
case REQUEST_PRIORITY_TRANSACTION: {
CHECK_INTERFACE(ISchedulingPolicyService, data, reply);
int32_t pid = data.readInt32();
int32_t tid = data.readInt32();
int32_t prio = data.readInt32();
int res = requestPriority_helper(pid, tid, prio);
reply->writeNoException();
reply->writeInt32(res);
return NO_ERROR;
} break;
default:
return BBinder::onTransact(code, data, reply, flags);
}
}
#if Q_ANDROID_VERSION_MAJOR == 4 && Q_ANDROID_VERSION_MINOR < 3
int SchedulingPolicyService::requestPriority(int32_t pid, int32_t tid, int32_t prio)
#else
int SchedulingPolicyService::requestPriority(int32_t pid, int32_t tid, int32_t prio, bool)
#endif
{
return requestPriority_helper(pid, tid, prio);
}
int SchedulingPolicyService::requestPriority_helper(int32_t pid, int32_t tid, int32_t prio)
{
if (prio < PRIORITY_MIN || prio > PRIORITY_MAX)
return PERMISSION_DENIED;
int res = set_sched_policy(tid, IPCThreadState::self()->getCallingPid() == pid ? SP_AUDIO_SYS
: SP_AUDIO_APP);
if (res != NO_ERROR)
return PERMISSION_DENIED;
struct sched_param param;
param.sched_priority = prio;
res = sched_setscheduler(tid, SCHED_FIFO, ¶m);
if (res)
return PERMISSION_DENIED;
return OK;
}
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