posix/src/timergetoverrun.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  *  @file
0005  *
0006  *  @brief Get Overrun Count for a POSIX Per-Process Timer
0007  *  @ingroup POSIX_PRIV_TIMERS
0008  */
0009
0010 /*
0011  *  COPYRIGHT (c) 1989-2007.
0012  *  On-Line Applications Research Corporation (OAR).
0013  *
0014  * Redistribution and use in source and binary forms, with or without
0015  * modification, are permitted provided that the following conditions
0016  * are met:
0017  * 1. Redistributions of source code must retain the above copyright
0018  *    notice, this list of conditions and the following disclaimer.
0019  * 2. Redistributions in binary form must reproduce the above copyright
0020  *    notice, this list of conditions and the following disclaimer in the
0021  *    documentation and/or other materials provided with the distribution.
0022  *
0023  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0024  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0025  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0026  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0027  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0028  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0029  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0030  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0031  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0032  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0033  * POSSIBILITY OF SUCH DAMAGE.
0034  */
0035
0036 #ifdef HAVE_CONFIG_H
0037 #include "config.h"
0038 #endif
0039
0040 #include <time.h>
0041 #include <errno.h>
0042
0043 #include <rtems/seterr.h>
0044 #include <rtems/score/thread.h>
0045 #include <rtems/posix/timerimpl.h>
0046
0047 int timer_getoverrun(
0048   timer_t   timerid
0049 )
0050 {
0051   POSIX_Timer_Control *ptimer;
0052   ISR_lock_Context     lock_context;
0053
0054   ptimer = _POSIX_Timer_Get( timerid, &lock_context );
0055   if ( ptimer != NULL ) {
0056     Per_CPU_Control *cpu;
0057     int              overrun;
0058
0059     cpu = _POSIX_Timer_Acquire_critical( ptimer, &lock_context );
0060     overrun = ptimer->overrun;
0061     ptimer->overrun = 0;
0062     _POSIX_Timer_Release( cpu, &lock_context );
0063     return overrun;
0064   }
0065
0066   rtems_set_errno_and_return_minus_one( EINVAL );
0067 }