82 lines
2.9 KiB
C
82 lines
2.9 KiB
C
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/****************************************************************************
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* include/sys/times.h
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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#ifndef __INCLUDE_SYS_TIMES_H
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#define __INCLUDE_SYS_TIMES_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <sys/types.h>
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/****************************************************************************
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* Public Type Definitions
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****************************************************************************/
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/* Structure describing CPU time used by a process and its children. */
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struct tms
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{
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clock_t tms_utime; /* User CPU time. */
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clock_t tms_stime; /* System CPU time. */
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clock_t tms_cutime; /* User CPU time of dead children. */
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clock_t tms_cstime; /* System CPU time of dead children. */
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};
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#undef EXTERN
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#if defined(__cplusplus)
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Name: times
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*
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* Description:
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* The times() function shall fill the tms structure pointed to by buffer
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* with time-accounting information.
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*
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* Returned Value:
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* Upon successful completion, times() shall return the elapsed real time,
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* in clock ticks, since an arbitrary point in the past (for example,
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* system start-up time). This point does not change from one invocation
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* of times() within the process to another. The return value may overflow
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* the possible range of type clock_t. If times() fails, (clock_t)-1 shall
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* be returned and errno set to indicate the error.
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*
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****************************************************************************/
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clock_t times(FAR struct tms *buffer);
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#undef EXTERN
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#if defined(__cplusplus)
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}
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#endif
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#endif /* __INCLUDE_SYS_TIMES_H */
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