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FmMsg.cpp
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FmMsg.cpp
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/**
* Copyright (c) 2014 Null Pointer Software
* All rights reserved.
*
* Developed by: Null Pointer Software Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
* associated documentation files (the "Software"), to deal with the Software without restriction,
* including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* 1 Redistributions of source code must retain the above copyright notice, this list of conditions and
* the following disclaimers.
* 2 Redistributions in binary form must reproduce the above copyright notice, this list of conditions
* and the following disclaimers in the documentation and/or other materials provided with the distribution.
* 3 Neither the names of <Name of Development Group, Name of Institution>, nor the names of its contributors
* may be used to endorse or promote products derived from this Software without specific prior written permission.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
* LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
* OR THE USE OR OTHER DEALINGS WITH THE SOFTWARE.
*/
#include "FmMsg.h"
#include "messanger.h"
#include <cstddef>
#include <cstdio>
#include <cerrno>
#include <cstdlib>
#include <cstring>
#include <sys/socket.h>
#include <sys/un.h>
FmMsg::FmMsg(char * name, int max, void * (*handle) (FmMsgEntry *)) : _max(max) {
init(name, handle);
Fm_Register(name, this);
}
FmMsg::~FmMsg() {
free(_name);
}
void FmMsg::init(char * name, void * (*handle) (FmMsgEntry *)) {
_name = (char *) malloc(strlen(name) + 1);
strcpy(_name, name);
_name[strlen(name)] = '\0';
_handle = handle;
}
FmMsgEntry FmMsg::retrieve() {
if (!lock_data() || _buf.empty()) {
FmMsgEntry ret(0, RAW);
return ret;
} else {
FmMsgEntry ret(_buf.front(), OWNERSHIP);
_buf.pop();
unlock_data();
--_cnt;
return ret;
}
}
bool FmMsg::retrieve(FmMsgEntry * dst) {
if (!lock_data() || _buf.empty()) {
return false;
} else {
dst = &_buf.front();
unlock_data();
return true;
}
}
bool FmMsg::retrieve_next(FmMsgEntry * dst) {
FmMsgEntry src = retrieve();
dst = &src;
return (src.getProperty().size == 0) ? false : true;
}
bool FmMsg::insert(FmMsgEntry * src) {
if (_cnt == _max) {
_handle(src);
return false;
}
while(!lock_data());
_buf.push(*src);
unlock_data();
++_cnt;
return true;
}
bool FmMsg::insert(int size, void * content, FmMsgEntry_type type) {
FmMsgEntry dst(size, type);
dst.populate(content, size, type);
if (_cnt == _max) {
_handle(&dst);
return false;
}
while (!lock_data()); // wait for the lock.
_buf.push(dst);
unlock_data();
++_cnt;
return true;
}
bool FmMsg::insert(FmMsgQ_entry * src) {
if (!strcmp(_name, src->dst)) {
FmMsgEntry dst(*(src->data), OWNERSHIP);
if (_cnt == _max) {
_handle(src->data);
return false;
}
while (!lock_data()); // wait for the lock.
_buf.push(dst);
unlock_data();
++_cnt;
_flag = true;
} else {
_flag = false;
}
return _flag;
}