140 lines
3.4 KiB
C++
140 lines
3.4 KiB
C++
/*
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; Project: Open Vehicle Monitor System
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; Date: 14th March 2017
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;
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; Changes:
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; 1.0 Initial release
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;
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; (C) 2011 Michael Stegen / Stegen Electronics
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; (C) 2011-2017 Mark Webb-Johnson
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; (C) 2011 Sonny Chen @ EPRO/DX
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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 deal
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; in the Software without restriction, including without limitation the rights
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; to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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; 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 FROM,
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; OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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; THE SOFTWARE.
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*/
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#include "ovms_log.h"
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static const char *TAG = "mutex";
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#include "ovms_mutex.h"
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/**
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* Standard Mutex:
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*/
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OvmsMutex::OvmsMutex()
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{
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m_mutex = xSemaphoreCreateMutex();
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}
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OvmsMutex::~OvmsMutex()
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{
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// Note: no concurrency protection here to keep this lightweight.
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// If you need some, implement on application level.
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TaskHandle_t holder = xSemaphoreGetMutexHolder(m_mutex);
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if (holder == xTaskGetCurrentTaskHandle())
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{
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Unlock();
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}
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else if (holder)
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{
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ESP_LOGE(TAG, "attempt to delete an OvmsMutex still locked by %p => abort", holder);
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abort();
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}
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vSemaphoreDelete(m_mutex);
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}
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bool OvmsMutex::Lock(TickType_t timeout)
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{
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return (xSemaphoreTake(m_mutex, timeout) == pdTRUE);
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}
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void OvmsMutex::Unlock()
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{
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xSemaphoreGive(m_mutex);
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}
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OvmsMutexLock::OvmsMutexLock(OvmsMutex* mutex, TickType_t timeout)
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{
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m_mutex = mutex;
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m_locked = m_mutex->Lock(timeout);
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}
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OvmsMutexLock::~OvmsMutexLock()
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{
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if (m_locked) m_mutex->Unlock();
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}
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bool OvmsMutexLock::IsLocked()
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{
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return m_locked;
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}
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/**
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* Recursive Mutex:
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*/
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OvmsRecMutex::OvmsRecMutex()
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{
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m_mutex = xSemaphoreCreateRecursiveMutex();
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}
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OvmsRecMutex::~OvmsRecMutex()
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{
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// Note: no concurrency protection here to keep this lightweight.
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// If you need some, implement on application level.
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TaskHandle_t holder, me = xTaskGetCurrentTaskHandle();
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while ((holder = xSemaphoreGetMutexHolder(m_mutex)) != NULL)
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{
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if (holder == me)
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{
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Unlock();
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}
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else
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{
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ESP_LOGE(TAG, "attempt to delete an OvmsRecMutex still locked by %p => abort", holder);
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abort();
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}
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}
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vSemaphoreDelete(m_mutex);
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}
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bool OvmsRecMutex::Lock(TickType_t timeout)
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{
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return (xSemaphoreTakeRecursive(m_mutex, timeout) == pdTRUE);
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}
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void OvmsRecMutex::Unlock()
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{
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xSemaphoreGiveRecursive(m_mutex);
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}
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OvmsRecMutexLock::OvmsRecMutexLock(OvmsRecMutex* mutex, TickType_t timeout)
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{
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m_mutex = mutex;
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m_locked = m_mutex->Lock(timeout);
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}
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OvmsRecMutexLock::~OvmsRecMutexLock()
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{
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if (m_locked) m_mutex->Unlock();
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}
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bool OvmsRecMutexLock::IsLocked()
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{
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return m_locked;
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}
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