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/* $Id: PDMAllTask.cpp $ */
/** @file
* PDM Task - Asynchronous user mode tasks, all context code.
*/
/*
* Copyright (C) 2019-2020 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#define LOG_GROUP LOG_GROUP_PDM_TASK
#include "PDMInternal.h"
#include <VBox/vmm/pdmtask.h>
#include <VBox/vmm/gvm.h>
#include <VBox/err.h>
#include <VBox/log.h>
#include <VBox/sup.h>
#include <iprt/asm.h>
#include <iprt/assert.h>
#include <iprt/semaphore.h>
/**
* Triggers a task.
*
* @returns VBox status code.
* @retval VINF_ALREADY_POSTED is the task is already pending.
*
* @param pVM The cross context VM structure.
* @param enmType The task owner type.
* @param pvOwner The task owner.
* @param hTask The task to trigger.
* @thread Any
*/
VMM_INT_DECL(int) PDMTaskTrigger(PVMCC pVM, PDMTASKTYPE enmType, RTR3PTR pvOwner, PDMTASKHANDLE hTask)
{
/*
* Validate input and translate the handle to a task.
*/
AssertReturn(pvOwner, VERR_NOT_OWNER);
AssertReturn(enmType >= PDMTASKTYPE_DEV && enmType <= PDMTASKTYPE_INTERNAL, VERR_NOT_OWNER);
size_t const iTask = hTask % RT_ELEMENTS(pVM->pdm.s.aTaskSets[0].aTasks);
size_t const iTaskSet = hTask / RT_ELEMENTS(pVM->pdm.s.aTaskSets[0].aTasks);
#ifdef IN_RING3
AssertReturn(iTaskSet < RT_ELEMENTS(pVM->pdm.s.apTaskSets), VERR_INVALID_HANDLE);
PPDMTASKSET pTaskSet = pVM->pdm.s.apTaskSets[iTaskSet];
AssertReturn(pTaskSet, VERR_INVALID_HANDLE);
#else
AssertReturn(iTaskSet < RT_ELEMENTS(pVM->pdm.s.aTaskSets),
iTaskSet < RT_ELEMENTS(pVM->pdm.s.apTaskSets) ? VERR_INVALID_CONTEXT : VERR_INVALID_HANDLE);
PPDMTASKSET pTaskSet = &pVM->pdm.s.aTaskSets[iTaskSet];
#endif
AssertReturn(pTaskSet->u32Magic == PDMTASKSET_MAGIC, VERR_INVALID_MAGIC);
PPDMTASK pTask = &pTaskSet->aTasks[iTask];
/*
* Check task ownership.
*/
AssertReturn(pvOwner == pTask->pvOwner, VERR_NOT_OWNER);
AssertReturn(enmType == pTask->enmType, VERR_NOT_OWNER);
/*
* Trigger the task, wake up the thread if the task isn't triggered yet.
*/
if (!ASMAtomicBitTestAndSet(&pTaskSet->fTriggered, (uint32_t)iTask))
{
Log(("PDMTaskTrigger: Triggered %RU64 (%s)\n", hTask, R3STRING(pTask->pszName)));
#ifdef IN_RING3
if (pTaskSet->hEventR3 != NIL_RTSEMEVENT)
{
int rc = RTSemEventSignal(pTaskSet->hEventR3);
AssertLogRelRCReturn(rc, rc);
}
else
#endif
{
int rc = SUPSemEventSignal(pVM->pSession, pTaskSet->hEventR0);
AssertLogRelRCReturn(rc, rc);
}
return VINF_SUCCESS;
}
ASMAtomicIncU32(&pTask->cAlreadyTrigged);
Log(("PDMTaskTrigger: %RU64 (%s) was already triggered\n", hTask, R3STRING(pTask->pszName)));
return VINF_ALREADY_POSTED;
}
/**
* Triggers an internal task.
*
* @returns VBox status code.
* @param pVM The cross context VM structure.
* @param hTask The task to trigger.
* @thread Any
*/
VMM_INT_DECL(int) PDMTaskTriggerInternal(PVMCC pVM, PDMTASKHANDLE hTask)
{
return PDMTaskTrigger(pVM, PDMTASKTYPE_INTERNAL, pVM->pVMR3, hTask);
}
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