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d19e885fb9
The `arm_common` syscalls implement `_gettimeofday()` for the benefit of newlib. The syscall call only work if the `rtc` module or the `vtimer` modules is transcluded. If neither module is used, a warning is printed by means of `#warning`. This warning is useless if the user does not invoke `gettimeofday()`. Further this warning prevents the use of `-Werror`. This PR puts the function in its own file, that will only be linked if it was used. And if the function was used, then a link time error occur if neither `rtc` nor `vtimer` was transcluded.
48 lines
1.2 KiB
C
48 lines
1.2 KiB
C
/*
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* Copyright (C) 2013 Oliver Hahm <oliver.hahm@inria.fr>
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*
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* This source code is licensed under the GNU Lesser General Public License,
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* Version 2. See the file LICENSE for more details.
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*
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* This file is part of RIOT.
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*
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*/
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/**
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* @file
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* @ingroup arm_common
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* @brief LPC2387 Newlib gettimeofday() system call glue
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*
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* @author Freie Universität Berlin, Computer Systems & Telematics
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* @author Michael Baar <michael.baar@fu-berlin.de>
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* @author René Kijewski <rene.kijewski@fu-berlin.de>
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*/
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#include <sys/time.h>
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#if defined MODULE_RTC
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# include "rtc.h"
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#elif defined MODULE_VTIMER
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# include "vtimer.h"
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#endif
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/* Declared as external, without a definition. */
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/* This will cause a linktime error, if _gettimeofday() is referenced, */
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/* and neither rtc nor vtimer were linked in. */
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extern void __gettimeofday_syscall_is_not_implemented_without_vtimer_or_rtc_module(void);
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int _gettimeofday(struct timeval *tp, void *restrict tzp)
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{
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(void) tzp;
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#if defined MODULE_RTC
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rtc_time(tp);
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#elif defined MODULE_VTIMER
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vtimer_gettimeofday(tp);
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#else
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__gettimeofday_syscall_is_not_implemented_without_vtimer_or_rtc_module();
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#endif
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return 0;
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}
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