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https://github.com/marqs85/ossc
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53 lines
1.8 KiB
C
53 lines
1.8 KiB
C
/*
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* Copyright (c) 2003 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 copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* 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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* ------------
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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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* usleep.c - Microsecond delay routine
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*/
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#include <unistd.h>
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#include "priv/alt_busy_sleep.h"
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#include "os/alt_syscall.h"
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/*
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* This function simply calls alt_busy_sleep() to perform the delay. This
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* function implements the delay as a calibrated "busy loop".
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*
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* ALT_USLEEP is mapped onto the usleep() system call in alt_syscall.h
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*/
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#if defined (__GNUC__) && __GNUC__ >= 4
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int ALT_USLEEP (useconds_t us)
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#else
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unsigned int ALT_USLEEP (unsigned int us)
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#endif
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{
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return alt_busy_sleep(us);
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}
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