OVMS3/OVMS.V3/main/ovms_semaphore.cpp

71 lines
2.1 KiB
C++

/*
; Project: Open Vehicle Monitor System
; Date: 14th March 2017
;
; Changes:
; 1.0 Initial release
;
; (C) 2011 Michael Stegen / Stegen Electronics
; (C) 2011-2017 Mark Webb-Johnson
; (C) 2011 Sonny Chen @ EPRO/DX
; (C) 2018 Michael Balzer
;
; Permission is hereby granted, free of charge, to any person obtaining a copy
; of this software and associated documentation files (the "Software"), to deal
; in the Software without restriction, including without limitation the rights
; to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
; copies of the Software, and to permit persons to whom the Software is
; furnished to do so, subject to the following conditions:
;
; The above copyright notice and this permission notice shall be included in
; all copies or substantial portions of the Software.
;
; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
; IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
; FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
; AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
; LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
; OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
; THE SOFTWARE.
*/
#include "ovms_semaphore.h"
OvmsSemaphore::OvmsSemaphore(int maxcount /*=1*/, int initcount /*=0*/)
{
if (maxcount == 1)
{
m_semaphore = xSemaphoreCreateBinary();
if (initcount == 1)
Give();
}
else
{
m_semaphore = xSemaphoreCreateCounting(maxcount, initcount);
}
}
OvmsSemaphore::~OvmsSemaphore()
{
vSemaphoreDelete(m_semaphore);
}
bool OvmsSemaphore::Take(TickType_t timeout)
{
return (xSemaphoreTake(m_semaphore, timeout) == pdTRUE);
}
void OvmsSemaphore::Give()
{
xSemaphoreGive(m_semaphore);
}
bool OvmsSemaphore::IsAvail()
{
return (uxSemaphoreGetCount(m_semaphore) > 0);
}
int OvmsSemaphore::GetCount()
{
return (int) uxSemaphoreGetCount(m_semaphore);
}