git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@1149 35acf78f-673a-0410-8e92-d51de3d6d3f4

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diff --git a/src/include/queues.h b/src/include/queues.h
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-/*
-    ChibiOS/RT - Copyright (C) 2006-2007 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/>.
-*/
-
-/**
- * @file queues.h I/O
- * @brief Queues macros and structures.
- * @addtogroup IOQueues
- * @{
- */
-
-#ifndef _QUEUES_H_
-#define _QUEUES_H_
-
-/** Queue notification callback type. */
-typedef void (*qnotify_t)(void);
-
-/** Returned by the queue functions if the operation is successful. */
-#define Q_OK            RDY_OK
-/** Returned by the queue functions if a timeout occurs. */
-#define Q_TIMEOUT       RDY_TIMEOUT
-/** Returned by the queue functions if the queue is reset. */
-#define Q_RESET         RDY_RESET
-/** Returned by the queue functions if the queue is empty. */
-#define Q_EMPTY         -3
-/** Returned by the queue functions if the queue is full. */
-#define Q_FULL          -4
-
-#if CH_USE_QUEUES
-/**
- * @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.
- */
-typedef struct {
-  uint8_t               *q_buffer;      /**< Pointer to the queue buffer.*/
-  uint8_t               *q_top;         /**< Pointer to the first location
-                                             after the buffer.*/
-  uint8_t               *q_wrptr;       /**< Write pointer.*/
-  uint8_t               *q_rdptr;       /**< Read pointer.*/
-  Semaphore             q_sem;          /**< Counter @p Semaphore.*/
-  qnotify_t             q_notify;       /**< Data notification callback.*/
-} GenericQueue;
-
-/** Returns the queue's buffer size. */
-#define chQSize(q) ((q)->q_top - (q)->q_buffer)
-
-/**
- * Returns the used space if used on an Input Queue and the empty space if
- * used on an Output Queue.
- * @note The returned value can be less than zero when there are waiting
- *       threads on the internal semaphore.
- */
-#define chQSpace(q) chSemGetCounterI(&(q)->q_sem)
-
-/**
- * @brief Input queue structure.
- * @details This structure represents a generic asymmetrical input queue.
- *          Writing in 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.
- * @extends GenericQueue
- */
-typedef GenericQueue InputQueue;
-
-/** Evaluates to @p TRUE if the specified Input Queue is empty. */
-#define chIQIsEmpty(q) (chQSpace(q) <= 0)
-
-/** Evaluates to @p TRUE if the specified Input Queue is full. */
-#define chIQIsFull(q) (chQSpace(q) >= chQSize(q))
-
-/**
- * @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 or:
- * @retval Q_RESET if the queue was reset.
- */
-#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 name the name of the input queue variable
- * @param buffer pointer to the queue buffer area
- * @param size size of the queue buffer area
- * @param inotify input notification callback pointer
- */
-#define _INPUTQUEUE_DATA(name, buffer, size, inotify) {                 \
-  (uint8_t *)(buffer),                                                  \
-  (uint8_t *)(buffer) + size,                                           \
-  (uint8_t *)(buffer),                                                  \
-  (uint8_t *)(buffer),                                                  \
-  _SEMAPHORE_DATA(name.q_sem, 0),                                       \
-  inotify                                                               \
-}
-
-/**
- * @brief Static input queue initializer.
- * @details Statically initialized input queues require no explicit
- *          initialization using @p chIQInit().
- * @param name the name of the input queue variable
- * @param buffer pointer to the queue buffer area
- * @param size size of the queue buffer area
- * @param inotify input notification callback pointer
- */
-#define INPUTQUEUE_DECL(name, buffer, size, inotify)                    \
-  InputQueue name = _INPUTQUEUE_DATA(name, buffer, size, inotify)
-
-/**
- * @brief 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.
- * @extends GenericQueue
- */
-typedef GenericQueue OutputQueue;
-
-/** Evaluates to @p TRUE if the specified Output Queue is empty. */
-#define chOQIsEmpty(q) (chQSpace(q) >= chQSize(q))
-
-/** Evaluates to @p TRUE if the specified Output Queue is full. */
-#define chOQIsFull(q) (chQSpace(q) <= 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 was reset.
- */
-#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 name the name of the output queue variable.
- * @param buffer pointer to the queue buffer area
- * @param size size of the queue buffer area
- * @param onotify output notification callback pointer
- */
-#define _OUTPUTQUEUE_DATA(name, buffer, size, onotify) {                \
-  (uint8_t *)(buffer),                                                  \
-  (uint8_t *)(buffer) + size,                                           \
-  (uint8_t *)(buffer),                                                  \
-  (uint8_t *)(buffer),                                                  \
-  _SEMAPHORE_DATA(name.q_sem, size),                                    \
-  onotify                                                               \
-}
-
-/**
- * @brief Static output queue initializer.
- * @details Statically initialized output queues require no explicit
- *          initialization using @p chOQInit().
- * @param name the name of the output queue variable
- * @param buffer pointer to the queue buffer area
- * @param size size of the queue buffer area
- * @param onotify output notification callback pointer
- */
-#define OUTPUTQUEUE_DECL(name, buffer, size, onotify)                   \
-  InputQueue name = _OUTPUTQUEUE_DATA(name, buffer, size, onotify)
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-  void chIQInit(InputQueue *qp, uint8_t *buffer, size_t size, qnotify_t inotify);
-  void chIQResetI(InputQueue *qp);
-  msg_t chIQPutI(InputQueue *qp, uint8_t b);
-  msg_t chIQGetTimeout(InputQueue *qp, systime_t timeout);
-  size_t chIQRead(InputQueue *qp, uint8_t *buffer, size_t n);
-
-  void chOQInit(OutputQueue *queue, uint8_t *buffer, size_t size, qnotify_t onotify);
-  void chOQResetI(OutputQueue *queue);
-  msg_t chOQPutTimeout(OutputQueue *queue, uint8_t b, systime_t timeout);
-  msg_t chOQGetI(OutputQueue *queue);
-  size_t chOQWrite(OutputQueue *queue, uint8_t *buffer, size_t n);
-#ifdef __cplusplus
-}
-#endif
-#endif  /* CH_USE_QUEUES */
-
-#endif /* _QUEUES_H_ */
-
-/** @} */