zephyr/kernel/microkernel/k_pipe_util.c

167 lines
4.5 KiB
C

/* k_pipe_util.c */
/*
* Copyright (c) 1997-2014 Wind River Systems, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1) Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2) 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.
*
* 3) Neither the name of Wind River Systems 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 THE COPYRIGHT HOLDER OR 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 <minik.h>
#include <k_pipe_util.h>
#include <string.h>
#include <toolchain.h>
#include <sections.h>
#include <misc/__assert.h>
#define _ALL_OPT (0x000000FF)
void DeListWaiter(struct k_args *pReqProc)
{
__ASSERT_NO_MSG(NULL != pReqProc->Head);
REMOVE_ELM(pReqProc);
pReqProc->Head = NULL;
}
void myfreetimer(struct k_timer * *ppTimer)
{
if (*ppTimer) {
delist_timer(*ppTimer);
FREETIMER(*ppTimer);
*ppTimer = NULL;
}
}
/* adapted from mailbox implementation of copypacket() */
void mycopypacket(struct k_args **out, struct k_args *in)
{
GETARGS(*out);
memcpy(*out, in, sizeof(struct k_args));
(*out)->Ctxt.args = in;
}
int CalcFreeReaderSpace(struct k_args *pReaderList)
{
int iSize = 0;
if (pReaderList) {
struct k_args *pReader = pReaderList;
while (pReader != NULL) {
iSize += (pReader->Args.ChProc.iSizeTotal -
pReader->Args.ChProc.iSizeXferred);
pReader = pReader->Forw;
}
}
return iSize;
}
int CalcAvailWriterData(struct k_args *pWriterList)
{
int iSize = 0;
if (pWriterList) {
struct k_args *pWriter = pWriterList;
while (pWriter != NULL) {
iSize += (pWriter->Args.ChProc.iSizeTotal -
pWriter->Args.ChProc.iSizeXferred);
pWriter = pWriter->Forw;
}
}
return iSize;
}
K_PIPE_OPTION ChxxxGetChOpt(K_ARGS_ARGS * pChxxx)
{
return (K_PIPE_OPTION)(pChxxx->ChProc.ReqInfo.Params & _ALL_OPT);
}
void ChxxxSetChOpt(K_ARGS_ARGS *pChxxx, K_PIPE_OPTION option)
{
pChxxx->ChProc.ReqInfo.Params &=
(~_ALL_OPT); /* clear destination field */
pChxxx->ChProc.ReqInfo.Params |=
(option & _ALL_OPT); /* make sure we do not screw up other fields */
}
REQ_TYPE ChxxxGetReqType(K_ARGS_ARGS *pChxxx)
{
return (REQ_TYPE)(pChxxx->ChProc.ReqInfo.Params & _ALLREQ);
}
void ChxxxSetReqType(K_ARGS_ARGS *pChxxx, REQ_TYPE ReqType)
{
pChxxx->ChProc.ReqInfo.Params &=
(~_ALLREQ); /* clear destination field */
pChxxx->ChProc.ReqInfo.Params |=
(ReqType & _ALLREQ); /* make sure we do not screw up other fields */
}
TIME_TYPE ChxxxGetTimeType(K_ARGS_ARGS *pChxxx)
{
return (TIME_TYPE)(pChxxx->ChProc.ReqInfo.Params & _ALLTIME);
}
void ChxxxSetTimeType(K_ARGS_ARGS *pChxxx,
TIME_TYPE TimeType)
{
pChxxx->ChProc.ReqInfo.Params &=
(~_ALLTIME); /* clear destination field */
pChxxx->ChProc.ReqInfo.Params |=
(TimeType & _ALLTIME); /* make sure we do not screw up other fields */
}
CHREQ_STATUS ChReqGetStatus(struct k_chproc *pChProc)
{
return pChProc->Status;
}
void ChReqSetStatus(struct k_chproc *pChProc, CHREQ_STATUS Status)
{
#ifdef CONFIG_OBJECT_MONITOR
/*
* if transition XFER_IDLE --> XFER_BUSY, TERM_XXX
* increment channel counter
*/
if (XFER_IDLE == pChProc->Status /* current (old) status */
&& (XFER_BUSY | TERM_XXX) & Status /* new status */) {
(pChProc->ReqInfo.ChRef.pPipe->Count)++;
}
#endif
pChProc->Status = Status;
}
int ChReqSizeXferred(struct k_chproc *pChProc)
{
return pChProc->iSizeXferred;
}
int ChReqSizeLeft(struct k_chproc *pChProc)
{
return (pChProc->iSizeTotal - pChProc->iSizeXferred);
}