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72 lines
3.4 KiB
C
72 lines
3.4 KiB
C
/******************************************************************************
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* *
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* License Agreement *
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* *
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* Copyright (c) 2004 Altera Corporation, San Jose, California, USA. *
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* All rights reserved. *
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* *
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* Permission is hereby granted, free of charge, to any person obtaining a *
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* copy of this software and associated documentation files (the "Software"), *
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* to deal in the Software without restriction, including without limitation *
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* the rights to use, copy, modify, merge, publish, distribute, sublicense, *
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* and/or sell copies of the Software, and to permit persons to whom the *
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* Software is furnished to do so, subject to the following conditions: *
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* *
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* The above copyright notice and this permission notice shall be included in *
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* all copies or substantial portions of the Software. *
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* *
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR *
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE *
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER *
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING *
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER *
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* DEALINGS IN THE SOFTWARE. *
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* *
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* This agreement shall be governed in all respects by the laws of the State *
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* of California and by the laws of the United States of America. *
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* *
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* Altera does not recommend, suggest or require that this reference design *
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* file be used in conjunction or combination with any other product. *
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******************************************************************************/
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#include <sys/times.h>
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#include "sys/alt_errno.h"
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#include "sys/alt_alarm.h"
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#include "os/alt_syscall.h"
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/*
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* The times() function is used by newlib to obtain elapsed time information.
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* The return value is the elapsed time since reset in system clock ticks. Note
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* that this is distinct from the strict Posix version of times(), which should
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* return the time since: 0 hours, 0 minutes, 0 seconds, January 1, 1970, GMT.
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*
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* The input structure is filled in with time accounting information. This
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* implementation attributes all cpu time to the system.
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*
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* ALT_TIMES is mapped onto the times() system call in alt_syscall.h
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*/
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clock_t ALT_TIMES (struct tms *buf)
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{
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clock_t ticks = alt_nticks();
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/* If there is no system clock present, generate an error */
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if (!alt_ticks_per_second())
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{
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ALT_ERRNO = ENOSYS;
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return 0;
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}
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/* Otherwise return the elapsed time */
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buf->tms_utime = 0;
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buf->tms_stime = ticks;
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buf->tms_cutime = 0;
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buf->tms_cstime = 0;
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return ticks;
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}
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