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author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2007-03-21 00:56:49 +0000 |
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committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2007-03-21 00:56:49 +0000 |
commit | 7407828071d3d8f8d15f4e99e34114208e97bc33 (patch) | |
tree | 55f414d0bf1e4009ff3ff6c8c2b0910fc2ee1786 /nuttx/sched/timer_getoverrun.c | |
parent | 4edac7e4a38497af50c177c9604806670b76345f (diff) | |
download | px4-nuttx-7407828071d3d8f8d15f4e99e34114208e97bc33.tar.gz px4-nuttx-7407828071d3d8f8d15f4e99e34114208e97bc33.tar.bz2 px4-nuttx-7407828071d3d8f8d15f4e99e34114208e97bc33.zip |
Add the framework to support POSIX timers
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@110 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/sched/timer_getoverrun.c')
-rw-r--r-- | nuttx/sched/timer_getoverrun.c | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/nuttx/sched/timer_getoverrun.c b/nuttx/sched/timer_getoverrun.c new file mode 100644 index 000000000..8dbd8da62 --- /dev/null +++ b/nuttx/sched/timer_getoverrun.c @@ -0,0 +1,108 @@ +/******************************************************************************** + * timer_getoverrun.c + * + * Copyright (C) 2007 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 Gregory Nutt 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> + +#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) +{ +#warning "Not Implemented" + return ENOTSUP; +} + +#endif /* CONFIG_DISABLE_POSIX_TIMERS */ |