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/*
Copyright (c) 2015 Arduino LLC. All right reserved.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* Empty yield() hook.
*
* This function is intended to be used by library writers to build
* libraries or sketches that supports cooperative threads.
*
* Its defined as a weak symbol and it can be redefined to implement a
* real cooperative scheduler.
*/
static void __empty() {
// Empty
}
void yield(void) __attribute__ ((weak, alias("__empty")));
/**
* SysTick hook
*
* This function is called from SysTick handler, before the default
* handler provided by Arduino.
*/
static int __false() {
// Return false
return 0;
}
int sysTickHook(void) __attribute__ ((weak, alias("__false")));
/**
* SVC hook
* PendSV hook
*
* These functions are called from SVC handler, and PensSV handler.
* Default action is halting.
*/
static void __halt() {
// Halts
while (1)
;
}
void svcHook(void) __attribute__ ((weak, alias("__halt")));
void pendSVHook(void) __attribute__ ((weak, alias("__halt")));
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