Diff: rtx_ca/rt_Mailbox.c

Revision:

49:77c8e4604045

Parent:

48:e9a2c7cb57a4

Child:

50:64a5202c3676

--- a/rtx_ca/rt_Mailbox.c	Thu Nov 06 11:00:33 2014 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,296 +0,0 @@
-/*----------------------------------------------------------------------------
- *      RL-ARM - RTX
- *----------------------------------------------------------------------------
- *      Name:    RT_MAILBOX.C
- *      Purpose: Implements waits and wake-ups for mailbox messages
- *      Rev.:    V4.60
- *----------------------------------------------------------------------------
- *
- * Copyright (c) 1999-2009 KEIL, 2009-2012 ARM Germany GmbH
- * All rights reserved.
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *  - Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- *  - Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *  - Neither the name of ARM  nor the names of its contributors may be used 
- *    to endorse or promote products derived from this software without 
- *    specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *---------------------------------------------------------------------------*/
-
-#include "rt_TypeDef.h"
-#include "RTX_Config.h"
-#include "rt_System.h"
-#include "rt_List.h"
-#include "rt_Mailbox.h"
-#include "rt_MemBox.h"
-#include "rt_Task.h"
-#ifdef __CORTEX_A9
-#include "rt_HAL_CA.h"
-#else
-#include "rt_HAL_CM.h"
-#endif
-
-
-/*----------------------------------------------------------------------------
- *      Functions
- *---------------------------------------------------------------------------*/
-
-
-/*--------------------------- rt_mbx_init -----------------------------------*/
-
-void rt_mbx_init (OS_ID mailbox, U16 mbx_size) {
-  /* Initialize a mailbox */
-  P_MCB p_MCB = mailbox;
-
-  p_MCB->cb_type = MCB;
-  p_MCB->state   = 0;
-  p_MCB->isr_st  = 0;
-  p_MCB->p_lnk   = NULL;
-  p_MCB->first   = 0;
-  p_MCB->last    = 0;
-  p_MCB->count   = 0;
-  p_MCB->size    = (mbx_size + sizeof(void *) - sizeof(struct OS_MCB)) /
-                                                     (U32)sizeof (void *);
-}
-
-
-/*--------------------------- rt_mbx_send -----------------------------------*/
-
-OS_RESULT rt_mbx_send (OS_ID mailbox, void *p_msg, U16 timeout) {
-  /* Send message to a mailbox */
-  P_MCB p_MCB = mailbox;
-  P_TCB p_TCB;
-
-  if ((p_MCB->p_lnk != NULL) && (p_MCB->state == 1)) {
-    /* A task is waiting for message */
-    p_TCB = rt_get_first ((P_XCB)p_MCB);
-#ifdef __CMSIS_RTOS
-    rt_ret_val2(p_TCB, 0x10/*osEventMessage*/, (U32)p_msg);
-#else
-    *p_TCB->msg = p_msg;
-    rt_ret_val (p_TCB, OS_R_MBX);
-#endif
-    rt_rmv_dly (p_TCB);
-    rt_dispatch (p_TCB);
-  }
-  else {
-    /* Store message in mailbox queue */
-    if (p_MCB->count == p_MCB->size) {
-      /* No free message entry, wait for one. If message queue is full, */
-      /* then no task is waiting for message. The 'p_MCB->p_lnk' list   */
-      /* pointer can now be reused for send message waits task list.    */
-      if (timeout == 0) {
-        return (OS_R_TMO);
-      }
-      if (p_MCB->p_lnk != NULL) {
-        rt_put_prio ((P_XCB)p_MCB, os_tsk.run);
-      }
-      else {
-        p_MCB->p_lnk = os_tsk.run;
-        os_tsk.run->p_lnk  = NULL;
-        os_tsk.run->p_rlnk = (P_TCB)p_MCB;
-        /* Task is waiting to send a message */      
-        p_MCB->state = 2;
-      }
-      os_tsk.run->msg = p_msg;
-      rt_block (timeout, WAIT_MBX);
-      return (OS_R_TMO);
-    }
-    /* Yes, there is a free entry in a mailbox. */
-    p_MCB->msg[p_MCB->first] = p_msg;
-    rt_inc (&p_MCB->count);
-    if (++p_MCB->first == p_MCB->size) {
-      p_MCB->first = 0;
-    }
-  }
-  return (OS_R_OK);
-}
-
-
-/*--------------------------- rt_mbx_wait -----------------------------------*/
-
-OS_RESULT rt_mbx_wait (OS_ID mailbox, void **message, U16 timeout) {
-  /* Receive a message; possibly wait for it */
-  P_MCB p_MCB = mailbox;
-  P_TCB p_TCB;
-
-  /* If a message is available in the fifo buffer */
-  /* remove it from the fifo buffer and return. */
-  if (p_MCB->count) {
-    *message = p_MCB->msg[p_MCB->last];
-    if (++p_MCB->last == p_MCB->size) {
-      p_MCB->last = 0;
-    }
-    if ((p_MCB->p_lnk != NULL) && (p_MCB->state == 2)) {
-      /* A task is waiting to send message */
-      p_TCB = rt_get_first ((P_XCB)p_MCB);
-#ifdef __CMSIS_RTOS
-      rt_ret_val(p_TCB, 0/*osOK*/);
-#else
-      rt_ret_val(p_TCB, OS_R_OK);
-#endif
-      p_MCB->msg[p_MCB->first] = p_TCB->msg;
-      if (++p_MCB->first == p_MCB->size) {
-        p_MCB->first = 0;
-      }
-      rt_rmv_dly (p_TCB);
-      rt_dispatch (p_TCB);
-    }
-    else {
-      rt_dec (&p_MCB->count);
-    }
-    return (OS_R_OK);
-  }
-  /* No message available: wait for one */
-  if (timeout == 0) {
-    return (OS_R_TMO);
-  }
-  if (p_MCB->p_lnk != NULL) {
-    rt_put_prio ((P_XCB)p_MCB, os_tsk.run);
-  }
-  else {
-    p_MCB->p_lnk = os_tsk.run;
-    os_tsk.run->p_lnk = NULL;
-    os_tsk.run->p_rlnk = (P_TCB)p_MCB;
-    /* Task is waiting to receive a message */      
-    p_MCB->state = 1;
-  }
-  rt_block(timeout, WAIT_MBX);
-#ifndef __CMSIS_RTOS
-  os_tsk.run->msg = message;
-#endif
-  return (OS_R_TMO);
-}
-
-
-/*--------------------------- rt_mbx_check ----------------------------------*/
-
-OS_RESULT rt_mbx_check (OS_ID mailbox) {
-  /* Check for free space in a mailbox. Returns the number of messages     */
-  /* that can be stored to a mailbox. It returns 0 when mailbox is full.   */
-  P_MCB p_MCB = mailbox;
-
-  return (p_MCB->size - p_MCB->count);
-}
-
-
-/*--------------------------- isr_mbx_send ----------------------------------*/
-
-void isr_mbx_send (OS_ID mailbox, void *p_msg) {
-  /* Same function as "os_mbx_send", but to be called by ISRs. */
-  P_MCB p_MCB = mailbox;
-
-  rt_psq_enq (p_MCB, (U32)p_msg);
-  rt_psh_req ();
-}
-
-
-/*--------------------------- isr_mbx_receive -------------------------------*/
-
-OS_RESULT isr_mbx_receive (OS_ID mailbox, void **message) {
-  /* Receive a message in the interrupt function. The interrupt function   */
-  /* should not wait for a message since this would block the rtx os.      */
-  P_MCB p_MCB = mailbox;
-
-  if (p_MCB->count) {
-    /* A message is available in the fifo buffer. */
-    *message = p_MCB->msg[p_MCB->last];
-    if (p_MCB->state == 2) {
-      /* A task is locked waiting to send message */
-      rt_psq_enq (p_MCB, 0);
-      rt_psh_req ();
-    }
-    rt_dec (&p_MCB->count);
-    if (++p_MCB->last == p_MCB->size) {
-      p_MCB->last = 0;
-    }
-    return (OS_R_MBX);
-  }
-  return (OS_R_OK);
-}
-
-
-/*--------------------------- rt_mbx_psh ------------------------------------*/
-
-void rt_mbx_psh (P_MCB p_CB, void *p_msg) {
-  /* Store the message to the mailbox queue or pass it to task directly. */
-  P_TCB p_TCB;
-  void *mem;
-
-  if (p_CB->p_lnk != NULL) switch (p_CB->state) {
-#ifdef __CMSIS_RTOS
-    case 3:
-      /* Task is waiting to allocate memory, remove it from the waiting list */
-      mem = rt_alloc_box(p_msg);
-      if (mem == NULL) break;
-      p_TCB = rt_get_first ((P_XCB)p_CB);
-      rt_ret_val(p_TCB, (U32)mem);
-      p_TCB->state = READY;
-      rt_rmv_dly (p_TCB);
-      rt_put_prio (&os_rdy, p_TCB);
-      break;
-#endif
-    case 2:
-      /* Task is waiting to send a message, remove it from the waiting list */
-      p_TCB = rt_get_first ((P_XCB)p_CB);
-#ifdef __CMSIS_RTOS
-      rt_ret_val(p_TCB, 0/*osOK*/);
-#else
-      rt_ret_val(p_TCB, OS_R_OK);
-#endif
-      p_CB->msg[p_CB->first] = p_TCB->msg;
-      rt_inc (&p_CB->count);
-      if (++p_CB->first == p_CB->size) {
-        p_CB->first = 0;
-      }
-      p_TCB->state = READY;
-      rt_rmv_dly (p_TCB);
-      rt_put_prio (&os_rdy, p_TCB);
-      break;
-    case 1:
-      /* Task is waiting for a message, pass the message to the task directly */
-      p_TCB = rt_get_first ((P_XCB)p_CB);
-#ifdef __CMSIS_RTOS
-      rt_ret_val2(p_TCB, 0x10/*osEventMessage*/, (U32)p_msg);
-#else
-      *p_TCB->msg = p_msg;
-      rt_ret_val (p_TCB, OS_R_MBX);
-#endif
-      p_TCB->state = READY;
-      rt_rmv_dly (p_TCB);
-      rt_put_prio (&os_rdy, p_TCB);
-      break;
-  } else {
-    /* No task is waiting for a message, store it to the mailbox queue */
-    if (p_CB->count < p_CB->size) {
-      p_CB->msg[p_CB->first] = p_msg;
-      rt_inc (&p_CB->count);
-      if (++p_CB->first == p_CB->size) {
-        p_CB->first = 0;
-      }
-    }
-    else {
-      os_error (OS_ERR_MBX_OVF);
-    }
-  }
-}
-
-/*----------------------------------------------------------------------------
- * end of file
- *---------------------------------------------------------------------------*/
-