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/*
* The MIT License (MIT)
*
* Copyright (c) 2019 Ha Thach (tinyusb.org)
*
* 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.
*
* This file is part of the TinyUSB stack.
*/
#ifndef TUSB_OSAL_NONE_H_
#define TUSB_OSAL_NONE_H_
#ifdef __cplusplus
extern "C" {
#endif
//--------------------------------------------------------------------+
// TASK API
//--------------------------------------------------------------------+
#if CFG_TUH_ENABLED
// currently only needed/available in host mode
TU_ATTR_WEAK void osal_task_delay(uint32_t msec);
#endif
//--------------------------------------------------------------------+
// Binary Semaphore API
//--------------------------------------------------------------------+
typedef struct {
volatile uint16_t count;
} osal_semaphore_def_t;
typedef osal_semaphore_def_t* osal_semaphore_t;
TU_ATTR_ALWAYS_INLINE static inline osal_semaphore_t osal_semaphore_create(osal_semaphore_def_t* semdef) {
semdef->count = 0;
return semdef;
}
TU_ATTR_ALWAYS_INLINE static inline bool osal_semaphore_delete(osal_semaphore_t semd_hdl) {
(void) semd_hdl;
return true; // nothing to do
}
TU_ATTR_ALWAYS_INLINE static inline bool osal_semaphore_post(osal_semaphore_t sem_hdl, bool in_isr) {
(void) in_isr;
sem_hdl->count++;
return true;
}
// TODO blocking for now
TU_ATTR_ALWAYS_INLINE static inline bool osal_semaphore_wait(osal_semaphore_t sem_hdl, uint32_t msec) {
(void) msec;
while (sem_hdl->count == 0) {}
sem_hdl->count--;
return true;
}
TU_ATTR_ALWAYS_INLINE static inline void osal_semaphore_reset(osal_semaphore_t sem_hdl) {
sem_hdl->count = 0;
}
//--------------------------------------------------------------------+
// MUTEX API
// Within tinyusb, mutex is never used in ISR context
//--------------------------------------------------------------------+
typedef osal_semaphore_def_t osal_mutex_def_t;
typedef osal_semaphore_t osal_mutex_t;
#if OSAL_MUTEX_REQUIRED
// Note: multiple cores MCUs usually do provide IPC API for mutex
// or we can use std atomic function
TU_ATTR_ALWAYS_INLINE static inline osal_mutex_t osal_mutex_create(osal_mutex_def_t* mdef) {
mdef->count = 1;
return mdef;
}
TU_ATTR_ALWAYS_INLINE static inline bool osal_mutex_delete(osal_mutex_t mutex_hdl) {
(void) mutex_hdl;
return true; // nothing to do
}
TU_ATTR_ALWAYS_INLINE static inline bool osal_mutex_lock (osal_mutex_t mutex_hdl, uint32_t msec) {
return osal_semaphore_wait(mutex_hdl, msec);
}
TU_ATTR_ALWAYS_INLINE static inline bool osal_mutex_unlock(osal_mutex_t mutex_hdl) {
return osal_semaphore_post(mutex_hdl, false);
}
#else
#define osal_mutex_create(_mdef) (NULL)
#define osal_mutex_lock(_mutex_hdl, _ms) (true)
#define osal_mutex_unlock(_mutex_hdl) (true)
#endif
//--------------------------------------------------------------------+
// QUEUE API
//--------------------------------------------------------------------+
#include "common/tusb_fifo.h"
typedef struct {
void (* interrupt_set)(bool);
tu_fifo_t ff;
} osal_queue_def_t;
typedef osal_queue_def_t* osal_queue_t;
// _int_set is used as mutex in OS NONE (disable/enable USB ISR)
#define OSAL_QUEUE_DEF(_int_set, _name, _depth, _type) \
uint8_t _name##_buf[_depth*sizeof(_type)]; \
osal_queue_def_t _name = { \
.interrupt_set = _int_set, \
.ff = TU_FIFO_INIT(_name##_buf, _depth, _type, false) \
}
// lock queue by disable USB interrupt
TU_ATTR_ALWAYS_INLINE static inline void _osal_q_lock(osal_queue_t qhdl) {
// disable dcd/hcd interrupt
qhdl->interrupt_set(false);
}
// unlock queue
TU_ATTR_ALWAYS_INLINE static inline void _osal_q_unlock(osal_queue_t qhdl) {
// enable dcd/hcd interrupt
qhdl->interrupt_set(true);
}
TU_ATTR_ALWAYS_INLINE static inline osal_queue_t osal_queue_create(osal_queue_def_t* qdef) {
tu_fifo_clear(&qdef->ff);
return (osal_queue_t) qdef;
}
TU_ATTR_ALWAYS_INLINE static inline bool osal_queue_delete(osal_queue_t qhdl) {
(void) qhdl;
return true; // nothing to do
}
TU_ATTR_ALWAYS_INLINE static inline bool osal_queue_receive(osal_queue_t qhdl, void* data, uint32_t msec) {
(void) msec; // not used, always behave as msec = 0
_osal_q_lock(qhdl);
bool success = tu_fifo_read(&qhdl->ff, data);
_osal_q_unlock(qhdl);
return success;
}
TU_ATTR_ALWAYS_INLINE static inline bool osal_queue_send(osal_queue_t qhdl, void const* data, bool in_isr) {
if (!in_isr) {
_osal_q_lock(qhdl);
}
bool success = tu_fifo_write(&qhdl->ff, data);
if (!in_isr) {
_osal_q_unlock(qhdl);
}
return success;
}
TU_ATTR_ALWAYS_INLINE static inline bool osal_queue_empty(osal_queue_t qhdl) {
// Skip queue lock/unlock since this function is primarily called
// with interrupt disabled before going into low power mode
return tu_fifo_empty(&qhdl->ff);
}
#ifdef __cplusplus
}
#endif
#endif
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