magistraleinformaticanetworking:spm:ff29_pipe3
Three stage pipeline (sample code)
- pipe3.cpp
/* -*- Mode: C++; tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/* ***************************************************************************
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
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* 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.
*
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* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
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* templates or use macros or inline functions from this file, or you compile
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* the GNU General Public License.
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*/
#include <cstdlib>
#include <cstdio>
#include <ff/pipeline.hpp>
using namespace ff;
// generic stage
class Stage1: public ff_node {
public:
Stage1(unsigned streamlen):streamlen(streamlen), seed(111) {}
int svc_init() {
srandom(seed);
return 0;
}
void * svc(void *) {
// f
for(size_t i=0;i<streamlen;++i)
ff_send_out(new long(random() % 1000000));
return NULL;
}
private:
unsigned streamlen;
unsigned seed;
};
class Stage2: public ff_node {
public:
void *svc(void *task) {
// g
long *t = static_cast<long*>(task);
usleep(*t);
return task;
}
};
class Stage3: public ff_node {
public:
void *svc(void *task) {
// h
long *t = static_cast<long*>(task);
printf("received %ld\n", *t);
delete t;
return GO_ON;
}
};
int main(int argc, char * argv[]) {
if (argc!=2) {
std::cerr << "use: " << argv[0] << " streamlen\n";
return -1;
}
// bild a 2-stage pipeline
ff_pipeline pipe;
pipe.add_stage(new Stage1(atoi(argv[1])));
pipe.add_stage(new Stage2);
pipe.add_stage(new Stage3);
if (pipe.run_and_wait_end()<0) {
error("running pipeline\n");
return -1;
}
std::cerr << "DONE, pipe time= " << pipe.ffTime() << " (ms)\n";
//pipe.ffStats(std::cerr);
return 0;
}
magistraleinformaticanetworking/spm/ff29_pipe3.txt · Ultima modifica: 29/10/2013 alle 17:19 (10 anni fa) da Marco Danelutto