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RIOT/cpu/arm_common/gettimeofday.c

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arm_common: no needless `_gettimeofday()` warning 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.
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/*
* Copyright (C) 2013 Oliver Hahm <oliver.hahm@inria.fr>
*
doc: use lgplv2.1-short license header instead of lgplv2-short-v2
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* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
arm_common: no needless `_gettimeofday()` warning 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.
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*/
/**
* @file
* @ingroup arm_common
* @brief LPC2387 Newlib gettimeofday() system call glue
*
* @author Michael Baar <michael.baar@fu-berlin.de>
* @author René Kijewski <rene.kijewski@fu-berlin.de>
*/
#include <sys/time.h>
core: harmonizes the data type for the process ID Instead of using differing integer types use kernel_pid_t for process identifier. This type is introduced in a new header file to avoid circular dependencies.
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#include "kernel_types.h"
arm_common: no needless `_gettimeofday()` warning 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.
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#if defined MODULE_RTC
# include "rtc.h"
#elif defined MODULE_VTIMER
# include "vtimer.h"
#endif
/* Declared as external, without a definition. */
/* This will cause a linktime error, if _gettimeofday() is referenced, */
/* and neither rtc nor vtimer were linked in. */
extern void __gettimeofday_syscall_is_not_implemented_without_vtimer_or_rtc_module(void);
int _gettimeofday(struct timeval *tp, void *restrict tzp)
{
(void) tzp;
#if defined MODULE_RTC
rtc_time(tp);
#elif defined MODULE_VTIMER
vtimer_gettimeofday(tp);
#else
boards/cpu: fix some warnings
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(void) tp;
arm_common: no needless `_gettimeofday()` warning 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.
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__gettimeofday_syscall_is_not_implemented_without_vtimer_or_rtc_module();
#endif
return 0;
}
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