mirror of
https://github.com/eried/portapack-mayhem.git
synced 2024-10-01 01:26:06 -04:00
377 lines
14 KiB
C
Executable File
377 lines
14 KiB
C
Executable File
/*
|
|
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
|
|
2011,2012,2013 Giovanni Di Sirio.
|
|
|
|
This file is part of ChibiOS/RT.
|
|
|
|
ChibiOS/RT is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
ChibiOS/RT 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 General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
---
|
|
|
|
A special exception to the GPL can be applied should you wish to distribute
|
|
a combined work that includes ChibiOS/RT, without being obliged to provide
|
|
the source code for any proprietary components. See the file exception.txt
|
|
for full details of how and when the exception can be applied.
|
|
*/
|
|
|
|
/**
|
|
* @file chqueues.h
|
|
* @brief I/O Queues macros and structures.
|
|
*
|
|
* @addtogroup io_queues
|
|
* @{
|
|
*/
|
|
|
|
#ifndef _CHQUEUES_H_
|
|
#define _CHQUEUES_H_
|
|
|
|
#if CH_USE_QUEUES || defined(__DOXYGEN__)
|
|
|
|
/**
|
|
* @name Queue functions returned status value
|
|
* @{
|
|
*/
|
|
#define Q_OK RDY_OK /**< @brief Operation successful. */
|
|
#define Q_TIMEOUT RDY_TIMEOUT /**< @brief Timeout condition. */
|
|
#define Q_RESET RDY_RESET /**< @brief Queue has been reset. */
|
|
#define Q_EMPTY -3 /**< @brief Queue empty. */
|
|
#define Q_FULL -4 /**< @brief Queue full, */
|
|
/** @} */
|
|
|
|
/**
|
|
* @brief Type of a generic I/O queue structure.
|
|
*/
|
|
typedef struct GenericQueue GenericQueue;
|
|
|
|
/** @brief Queue notification callback type.*/
|
|
typedef void (*qnotify_t)(GenericQueue *qp);
|
|
|
|
/**
|
|
* @brief Generic I/O queue structure.
|
|
* @details This structure represents a generic Input or Output asymmetrical
|
|
* queue. The queue is asymmetrical because one end is meant to be
|
|
* accessed from a thread context, and thus can be blocking, the other
|
|
* end is accessible from interrupt handlers or from within a kernel
|
|
* lock zone (see <b>I-Locked</b> and <b>S-Locked</b> states in
|
|
* @ref system_states) and is non-blocking.
|
|
*/
|
|
struct GenericQueue {
|
|
ThreadsQueue q_waiting; /**< @brief Queue of waiting threads. */
|
|
size_t q_counter; /**< @brief Resources counter. */
|
|
uint8_t *q_buffer; /**< @brief Pointer to the queue buffer.*/
|
|
uint8_t *q_top; /**< @brief Pointer to the first location
|
|
after the buffer. */
|
|
uint8_t *q_wrptr; /**< @brief Write pointer. */
|
|
uint8_t *q_rdptr; /**< @brief Read pointer. */
|
|
qnotify_t q_notify; /**< @brief Data notification callback. */
|
|
void *q_link; /**< @brief Application defined field. */
|
|
};
|
|
|
|
/**
|
|
* @name Macro Functions
|
|
* @{
|
|
*/
|
|
/**
|
|
* @brief Returns the queue's buffer size.
|
|
*
|
|
* @param[in] qp pointer to a @p GenericQueue structure.
|
|
* @return The buffer size.
|
|
*
|
|
* @iclass
|
|
*/
|
|
#define chQSizeI(qp) ((size_t)((qp)->q_top - (qp)->q_buffer))
|
|
|
|
/**
|
|
* @brief Queue space.
|
|
* @details Returns the used space if used on an input queue or the empty
|
|
* space if used on an output queue.
|
|
*
|
|
* @param[in] qp pointer to a @p GenericQueue structure.
|
|
* @return The buffer space.
|
|
*
|
|
* @iclass
|
|
*/
|
|
#define chQSpaceI(qp) ((qp)->q_counter)
|
|
|
|
/**
|
|
* @brief Returns the queue application-defined link.
|
|
* @note This function can be called in any context.
|
|
*
|
|
* @param[in] qp pointer to a @p GenericQueue structure.
|
|
* @return The application-defined link.
|
|
*
|
|
* @special
|
|
*/
|
|
#define chQGetLink(qp) ((qp)->q_link)
|
|
/** @} */
|
|
|
|
/**
|
|
* @extends GenericQueue
|
|
*
|
|
* @brief Type of an input queue structure.
|
|
* @details This structure represents a generic asymmetrical input queue.
|
|
* Writing to the queue is non-blocking and can be performed from
|
|
* interrupt handlers or from within a kernel lock zone (see
|
|
* <b>I-Locked</b> and <b>S-Locked</b> states in @ref system_states).
|
|
* Reading the queue can be a blocking operation and is supposed to
|
|
* be performed by a system thread.
|
|
*/
|
|
typedef GenericQueue InputQueue;
|
|
|
|
/**
|
|
* @name Macro Functions
|
|
* @{
|
|
*/
|
|
/**
|
|
* @brief Returns the filled space into an input queue.
|
|
*
|
|
* @param[in] iqp pointer to an @p InputQueue structure
|
|
* @return The number of full bytes in the queue.
|
|
* @retval 0 if the queue is empty.
|
|
*
|
|
* @iclass
|
|
*/
|
|
#define chIQGetFullI(iqp) chQSpaceI(iqp)
|
|
|
|
/**
|
|
* @brief Returns the empty space into an input queue.
|
|
*
|
|
* @param[in] iqp pointer to an @p InputQueue structure
|
|
* @return The number of empty bytes in the queue.
|
|
* @retval 0 if the queue is full.
|
|
*
|
|
* @iclass
|
|
*/
|
|
#define chIQGetEmptyI(iqp) (chQSizeI(iqp) - chQSpaceI(iqp))
|
|
|
|
/**
|
|
* @brief Evaluates to @p TRUE if the specified input queue is empty.
|
|
*
|
|
* @param[in] iqp pointer to an @p InputQueue structure.
|
|
* @return The queue status.
|
|
* @retval FALSE if the queue is not empty.
|
|
* @retval TRUE if the queue is empty.
|
|
*
|
|
* @iclass
|
|
*/
|
|
#define chIQIsEmptyI(iqp) ((bool_t)(chQSpaceI(iqp) <= 0))
|
|
|
|
/**
|
|
* @brief Evaluates to @p TRUE if the specified input queue is full.
|
|
*
|
|
* @param[in] iqp pointer to an @p InputQueue structure.
|
|
* @return The queue status.
|
|
* @retval FALSE if the queue is not full.
|
|
* @retval TRUE if the queue is full.
|
|
*
|
|
* @iclass
|
|
*/
|
|
#define chIQIsFullI(iqp) ((bool_t)(((iqp)->q_wrptr == (iqp)->q_rdptr) && \
|
|
((iqp)->q_counter != 0)))
|
|
|
|
/**
|
|
* @brief Input queue read.
|
|
* @details This function reads a byte value from an input queue. If the queue
|
|
* is empty then the calling thread is suspended until a byte arrives
|
|
* in the queue.
|
|
*
|
|
* @param[in] iqp pointer to an @p InputQueue structure
|
|
* @return A byte value from the queue.
|
|
* @retval Q_RESET if the queue has been reset.
|
|
*
|
|
* @api
|
|
*/
|
|
#define chIQGet(iqp) chIQGetTimeout(iqp, TIME_INFINITE)
|
|
/** @} */
|
|
|
|
/**
|
|
* @brief Data part of a static input queue initializer.
|
|
* @details This macro should be used when statically initializing an
|
|
* input queue that is part of a bigger structure.
|
|
*
|
|
* @param[in] name the name of the input queue variable
|
|
* @param[in] buffer pointer to the queue buffer area
|
|
* @param[in] size size of the queue buffer area
|
|
* @param[in] inotify input notification callback pointer
|
|
* @param[in] link application defined pointer
|
|
*/
|
|
#define _INPUTQUEUE_DATA(name, buffer, size, inotify, link) { \
|
|
_THREADSQUEUE_DATA(name), \
|
|
0, \
|
|
(uint8_t *)(buffer), \
|
|
(uint8_t *)(buffer) + (size), \
|
|
(uint8_t *)(buffer), \
|
|
(uint8_t *)(buffer), \
|
|
(inotify), \
|
|
(link) \
|
|
}
|
|
|
|
/**
|
|
* @brief Static input queue initializer.
|
|
* @details Statically initialized input queues require no explicit
|
|
* initialization using @p chIQInit().
|
|
*
|
|
* @param[in] name the name of the input queue variable
|
|
* @param[in] buffer pointer to the queue buffer area
|
|
* @param[in] size size of the queue buffer area
|
|
* @param[in] inotify input notification callback pointer
|
|
* @param[in] link application defined pointer
|
|
*/
|
|
#define INPUTQUEUE_DECL(name, buffer, size, inotify, link) \
|
|
InputQueue name = _INPUTQUEUE_DATA(name, buffer, size, inotify, link)
|
|
|
|
/**
|
|
* @extends GenericQueue
|
|
*
|
|
* @brief Type of an output queue structure.
|
|
* @details This structure represents a generic asymmetrical output queue.
|
|
* Reading from the queue is non-blocking and can be performed from
|
|
* interrupt handlers or from within a kernel lock zone (see
|
|
* <b>I-Locked</b> and <b>S-Locked</b> states in @ref system_states).
|
|
* Writing the queue can be a blocking operation and is supposed to
|
|
* be performed by a system thread.
|
|
*/
|
|
typedef GenericQueue OutputQueue;
|
|
|
|
/**
|
|
* @name Macro Functions
|
|
* @{
|
|
*/
|
|
/**
|
|
* @brief Returns the filled space into an output queue.
|
|
*
|
|
* @param[in] oqp pointer to an @p OutputQueue structure
|
|
* @return The number of full bytes in the queue.
|
|
* @retval 0 if the queue is empty.
|
|
*
|
|
* @iclass
|
|
*/
|
|
#define chOQGetFullI(oqp) (chQSizeI(oqp) - chQSpaceI(oqp))
|
|
|
|
/**
|
|
* @brief Returns the empty space into an output queue.
|
|
*
|
|
* @param[in] oqp pointer to an @p OutputQueue structure
|
|
* @return The number of empty bytes in the queue.
|
|
* @retval 0 if the queue is full.
|
|
*
|
|
* @iclass
|
|
*/
|
|
#define chOQGetEmptyI(oqp) chQSpaceI(oqp)
|
|
|
|
/**
|
|
* @brief Evaluates to @p TRUE if the specified output queue is empty.
|
|
*
|
|
* @param[in] oqp pointer to an @p OutputQueue structure.
|
|
* @return The queue status.
|
|
* @retval FALSE if the queue is not empty.
|
|
* @retval TRUE if the queue is empty.
|
|
*
|
|
* @iclass
|
|
*/
|
|
#define chOQIsEmptyI(oqp) ((bool_t)(((oqp)->q_wrptr == (oqp)->q_rdptr) && \
|
|
((oqp)->q_counter != 0)))
|
|
|
|
/**
|
|
* @brief Evaluates to @p TRUE if the specified output queue is full.
|
|
*
|
|
* @param[in] oqp pointer to an @p OutputQueue structure.
|
|
* @return The queue status.
|
|
* @retval FALSE if the queue is not full.
|
|
* @retval TRUE if the queue is full.
|
|
*
|
|
* @iclass
|
|
*/
|
|
#define chOQIsFullI(oqp) ((bool_t)(chQSpaceI(oqp) <= 0))
|
|
|
|
/**
|
|
* @brief Output queue write.
|
|
* @details This function writes a byte value to an output queue. If the queue
|
|
* is full then the calling thread is suspended until there is space
|
|
* in the queue.
|
|
*
|
|
* @param[in] oqp pointer to an @p OutputQueue structure
|
|
* @param[in] b the byte value to be written in the queue
|
|
* @return The operation status.
|
|
* @retval Q_OK if the operation succeeded.
|
|
* @retval Q_RESET if the queue has been reset.
|
|
*
|
|
* @api
|
|
*/
|
|
#define chOQPut(oqp, b) chOQPutTimeout(oqp, b, TIME_INFINITE)
|
|
/** @} */
|
|
|
|
/**
|
|
* @brief Data part of a static output queue initializer.
|
|
* @details This macro should be used when statically initializing an
|
|
* output queue that is part of a bigger structure.
|
|
*
|
|
* @param[in] name the name of the output queue variable
|
|
* @param[in] buffer pointer to the queue buffer area
|
|
* @param[in] size size of the queue buffer area
|
|
* @param[in] onotify output notification callback pointer
|
|
* @param[in] link application defined pointer
|
|
*/
|
|
#define _OUTPUTQUEUE_DATA(name, buffer, size, onotify, link) { \
|
|
_THREADSQUEUE_DATA(name), \
|
|
(size), \
|
|
(uint8_t *)(buffer), \
|
|
(uint8_t *)(buffer) + (size), \
|
|
(uint8_t *)(buffer), \
|
|
(uint8_t *)(buffer), \
|
|
(onotify), \
|
|
(link) \
|
|
}
|
|
|
|
/**
|
|
* @brief Static output queue initializer.
|
|
* @details Statically initialized output queues require no explicit
|
|
* initialization using @p chOQInit().
|
|
*
|
|
* @param[in] name the name of the output queue variable
|
|
* @param[in] buffer pointer to the queue buffer area
|
|
* @param[in] size size of the queue buffer area
|
|
* @param[in] onotify output notification callback pointer
|
|
* @param[in] link application defined pointer
|
|
*/
|
|
#define OUTPUTQUEUE_DECL(name, buffer, size, onotify, link) \
|
|
OutputQueue name = _OUTPUTQUEUE_DATA(name, buffer, size, onotify, link)
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
void chIQInit(InputQueue *iqp, uint8_t *bp, size_t size, qnotify_t infy,
|
|
void *link);
|
|
void chIQResetI(InputQueue *iqp);
|
|
msg_t chIQPutI(InputQueue *iqp, uint8_t b);
|
|
msg_t chIQGetTimeout(InputQueue *iqp, systime_t time);
|
|
size_t chIQReadTimeout(InputQueue *iqp, uint8_t *bp,
|
|
size_t n, systime_t time);
|
|
|
|
void chOQInit(OutputQueue *oqp, uint8_t *bp, size_t size, qnotify_t onfy,
|
|
void *link);
|
|
void chOQResetI(OutputQueue *oqp);
|
|
msg_t chOQPutTimeout(OutputQueue *oqp, uint8_t b, systime_t time);
|
|
msg_t chOQGetI(OutputQueue *oqp);
|
|
size_t chOQWriteTimeout(OutputQueue *oqp, const uint8_t *bp,
|
|
size_t n, systime_t time);
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
#endif /* CH_USE_QUEUES */
|
|
|
|
#endif /* _CHQUEUES_H_ */
|
|
|
|
/** @} */
|