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/*
* Copyright (c) 2014 The Linux Foundation. All rights reserved.
*
* Previously licensed under the ISC license by Qualcomm Atheros, Inc.
*
*
* Permission to use, copy, modify, and/or distribute this software for
* any purpose with or without fee is hereby granted, provided that the
* above copyright notice and this permission notice appear in all
* copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
* WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
* AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
/*
* This file was originally distributed by Qualcomm Atheros, Inc.
* under proprietary terms before Copyright ownership was assigned
* to the Linux Foundation.
*/
/**=========================================================================
\file vos_threads.c
\brief virtual Operating System Services (vOSS) Threading APIs
========================================================================*/
/* $Header$ */
/*--------------------------------------------------------------------------
Include Files
------------------------------------------------------------------------*/
#include <vos_threads.h>
#include <vos_trace.h>
#include <linux/jiffies.h>
#include <linux/sched.h>
#include <linux/sched/signal.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
/*--------------------------------------------------------------------------
Preprocessor definitions and constants
------------------------------------------------------------------------*/
/*--------------------------------------------------------------------------
Type declarations
------------------------------------------------------------------------*/
/*-------------------------------------------------------------------------
Function declarations and documenation
------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------
\brief vos_sleep() - sleep
The \a vos_sleep() function suspends the execution of the current thread
until the specified time out interval elapses.
\param msInterval - the number of milliseconds to suspend the current thread.
A value of 0 may or may not cause the current thread to yield.
\return Nothing.
\sa
--------------------------------------------------------------------------*/
v_VOID_t vos_sleep( v_U32_t msInterval )
{
if (in_interrupt())
{
VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, "%s cannot be called from interrupt context!!!", __func__);
return;
}
msleep_interruptible(msInterval);
}
/*----------------------------------------------------------------------------
\brief vos_sleep_us() - sleep
The \a vos_sleep_us() function suspends the execution of the current thread
until the specified time out interval elapses.
\param usInterval - the number of microseconds to suspend the current thread.
A value of 0 may or may not cause the current thread to yield.
\return Nothing.
\sa
--------------------------------------------------------------------------*/
v_VOID_t vos_sleep_us( v_U32_t usInterval )
{
unsigned long timeout = usecs_to_jiffies(usInterval) + 1;
if (in_interrupt())
{
VOS_TRACE(VOS_MODULE_ID_VOSS, VOS_TRACE_LEVEL_ERROR, "%s cannot be called from interrupt context!!!", __func__);
return;
}
while (timeout && !signal_pending(current))
timeout = schedule_timeout_interruptible(timeout);
}
/*----------------------------------------------------------------------------
\brief vos_busy_wait() - busy wait
The \a vos_busy_wait() function places the current thread in busy wait
until the specified time out interval elapses. If the interval is greater
than 50us on WM, the behaviour is undefined.
\param usInterval - the number of microseconds to busy wait.
\return Nothing.
\sa
--------------------------------------------------------------------------*/
v_VOID_t vos_busy_wait( v_U32_t usInterval )
{
udelay(usInterval);
}