114 lines
5.1 KiB
C
114 lines
5.1 KiB
C
/********************************************************************************
|
|
* timer_getoverrun.c
|
|
*
|
|
* Copyright (C) 2007, 2008 Gregory Nutt. All rights reserved.
|
|
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
* 3. Neither the name NuttX nor the names of its contributors may be
|
|
* used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
|
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
|
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
|
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
|
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
********************************************************************************/
|
|
|
|
/********************************************************************************
|
|
* Included Files
|
|
********************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
#include <time.h>
|
|
#include <errno.h>
|
|
#include "timer_internal.h"
|
|
|
|
#ifndef CONFIG_DISABLE_POSIX_TIMERS
|
|
|
|
/********************************************************************************
|
|
* Definitions
|
|
********************************************************************************/
|
|
|
|
/********************************************************************************
|
|
* Private Data
|
|
********************************************************************************/
|
|
|
|
/********************************************************************************
|
|
* Public Data
|
|
********************************************************************************/
|
|
|
|
/********************************************************************************
|
|
* Private Functions
|
|
********************************************************************************/
|
|
|
|
/********************************************************************************
|
|
* Public Functions
|
|
********************************************************************************/
|
|
|
|
/********************************************************************************
|
|
* Function: timer_getoverrun
|
|
*
|
|
* Description:
|
|
* Only a single signal will be queued to the process for a given timer at any
|
|
* point in time. When a timer for which a signal is still pending expires, no
|
|
* signal will be queued, and a timer overrun will occur. When a timer
|
|
* expiration signal is delivered to or accepted by a process, if the
|
|
* implementation supports the Realtime Signals Extension, the
|
|
* timer_getoverrun() function will return the timer expiration overrun count for
|
|
* the specified timer. The overrun count returned contains the number of extra
|
|
* timer expirations that occurred between the time the signal was generated
|
|
* (queued) and when it was delivered or accepted, up to but not including an
|
|
* implementation-defined maximum of DELAYTIMER_MAX. If the number of such
|
|
* extra expirations is greater than or equal to DELAYTIMER_MAX, then the
|
|
* overrun count will be set to DELAYTIMER_MAX. The value returned by
|
|
* timer_getoverrun() will apply to the most recent expiration signal delivery
|
|
* or acceptance for the timer. If no expiration signal has been delivered
|
|
* for the timer, or if the Realtime Signals Extension is not supported, the
|
|
* return value of timer_getoverrun() is unspecified.
|
|
*
|
|
* Parameters:
|
|
* timerid - The pre-thread timer, previously created by the call to
|
|
* timer_create(), whose overrun count will be returned..
|
|
*
|
|
* Return Value:
|
|
* If the timer_getoverrun() function succeeds, it will return the timer
|
|
* expiration overrun count as explained above. timer_getoverrun() will fail if:
|
|
*
|
|
* EINVAL - The timerid argument does not correspond to an ID returned by
|
|
* timer_create() but not yet deleted by timer_delete().
|
|
*
|
|
* Assumptions:
|
|
*
|
|
********************************************************************************/
|
|
|
|
int timer_getoverrun(timer_t timerid)
|
|
{
|
|
#ifdef CONFIG_CPP_HAVE_WARNING
|
|
# warning "timer_getoverrun not Implemented"
|
|
#endif
|
|
|
|
*get_errno_ptr() = ENOSYS;
|
|
return ERROR;
|
|
}
|
|
|
|
#endif /* CONFIG_DISABLE_POSIX_TIMERS */
|