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/* Copyright (c) 2011, The Linux Foundation. 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 The Linux Foundation 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 "AS IS" AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER 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 <linux/stat.h>
#include <fcntl.h>
#include <linux/types.h>
#include "log_util.h"
#include "platform_lib_includes.h"
#include "loc_eng_dmn_conn_glue_msg.h"
#include "loc_eng_dmn_conn_handler.h"
/*===========================================================================
FUNCTION loc_eng_dmn_conn_glue_msgget
DESCRIPTION
This function get a message queue
q_path - name path of the message queue
mode -
DEPENDENCIES
None
RETURN VALUE
message queue id
SIDE EFFECTS
N/A
===========================================================================*/
int loc_eng_dmn_conn_glue_msgget(const char * q_path, int mode)
{
int msgqid;
msgqid = loc_eng_dmn_conn_glue_pipeget(q_path, mode);
return msgqid;
}
/*===========================================================================
FUNCTION loc_eng_dmn_conn_glue_msgremove
DESCRIPTION
remove a message queue
q_path - name path of the message queue
msgqid - message queue id
DEPENDENCIES
None
RETURN VALUE
0: success or negative value for failure
SIDE EFFECTS
N/A
===========================================================================*/
int loc_eng_dmn_conn_glue_msgremove(const char * q_path, int msgqid)
{
int result;
result = loc_eng_dmn_conn_glue_piperemove(q_path, msgqid);
return result;
}
/*===========================================================================
FUNCTION loc_eng_dmn_conn_glue_msgsnd
DESCRIPTION
Send a message
msgqid - message queue id
msgp - pointer to the message to be sent
msgsz - size of the message
DEPENDENCIES
None
RETURN VALUE
number of bytes sent out or negative value for failure
SIDE EFFECTS
N/A
===========================================================================*/
int loc_eng_dmn_conn_glue_msgsnd(int msgqid, const void * msgp, size_t msgsz)
{
int result;
struct ctrl_msgbuf *pmsg = (struct ctrl_msgbuf *) msgp;
pmsg->msgsz = msgsz;
result = loc_eng_dmn_conn_glue_pipewrite(msgqid, msgp, msgsz);
if (result != (int) msgsz) {
LOC_LOGE("%s:%d] pipe broken %d, msgsz = %d\n", __func__, __LINE__, result, (int) msgsz);
return -1;
}
return result;
}
/*===========================================================================
FUNCTION loc_eng_dmn_conn_glue_msgrcv
DESCRIPTION
receive a message
msgqid - message queue id
msgp - pointer to the buffer to hold the message
msgsz - size of the buffer
DEPENDENCIES
None
RETURN VALUE
number of bytes received or negative value for failure
SIDE EFFECTS
N/A
===========================================================================*/
int loc_eng_dmn_conn_glue_msgrcv(int msgqid, void *msgp, size_t msgbufsz)
{
int result;
struct ctrl_msgbuf *pmsg = (struct ctrl_msgbuf *) msgp;
result = loc_eng_dmn_conn_glue_piperead(msgqid, &(pmsg->msgsz), sizeof(pmsg->msgsz));
if (result != sizeof(pmsg->msgsz)) {
LOC_LOGE("%s:%d] pipe broken %d\n", __func__, __LINE__, result);
return -1;
}
if (msgbufsz < pmsg->msgsz) {
LOC_LOGE("%s:%d] msgbuf is too small %d < %d\n", __func__, __LINE__, (int) msgbufsz, (int) pmsg->msgsz);
return -1;
}
result = loc_eng_dmn_conn_glue_piperead(msgqid, (uint8_t *) msgp + sizeof(pmsg->msgsz), pmsg->msgsz - sizeof(pmsg->msgsz));
if (result != (int) (pmsg->msgsz - sizeof(pmsg->msgsz))) {
LOC_LOGE("%s:%d] pipe broken %d, msgsz = %d\n", __func__, __LINE__, result, (int) pmsg->msgsz);
return -1;
}
return pmsg->msgsz;
}
/*===========================================================================
FUNCTION loc_eng_dmn_conn_glue_msgunblock
DESCRIPTION
unblock a message queue
msgqid - message queue id
DEPENDENCIES
None
RETURN VALUE
0: success
SIDE EFFECTS
N/A
===========================================================================*/
int loc_eng_dmn_conn_glue_msgunblock(int msgqid)
{
return loc_eng_dmn_conn_glue_pipeunblock(msgqid);
}
/*===========================================================================
FUNCTION loc_eng_dmn_conn_glue_msgflush
DESCRIPTION
flush out the message in a queue
msgqid - message queue id
DEPENDENCIES
None
RETURN VALUE
number of bytes that are flushed out.
SIDE EFFECTS
N/A
===========================================================================*/
int loc_eng_dmn_conn_glue_msgflush(int msgqid)
{
int length;
char buf[128];
do {
length = loc_eng_dmn_conn_glue_piperead(msgqid, buf, 128);
LOC_LOGD("%s:%d] %s\n", __func__, __LINE__, buf);
} while(length);
return length;
}
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