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Added nmux

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ha7ilm 2016-09-20 23:52:58 +02:00
parent f33a05250c
commit 11d639b7a3
4 changed files with 340 additions and 2 deletions
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2
Makefile
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@ -56,6 +56,8 @@ csdr: csdr.c libcsdr.so
gcc -std=gnu99 $(PARAMS_LOOPVECT) $(PARAMS_SIMD) csdr.c $(PARAMS_LIBS) -L. -lcsdr $(PARAMS_MISC) -o csdr
ddcd: ddcd.cpp libcsdr.so ddcd.h
g++ $(PARAMS_LOOPVECT) $(PARAMS_SIMD) ddcd.cpp $(PARAMS_LIBS) -L. -lcsdr -lpthread $(PARAMS_MISC) -o ddcd
nmux: nmux.cpp libcsdr.so nmux.h
g++ $(PARAMS_LOOPVECT) $(PARAMS_SIMD) nmux.cpp $(PARAMS_LIBS) -L. -lcsdr -lpthread $(PARAMS_MISC) -o nmux
arm-cross: clean-vect
#note: this doesn't work since having added FFTW
arm-linux-gnueabihf-gcc -std=gnu99 -O3 -fshort-double -ffast-math -dumpbase dumpvect-arm -fdump-tree-vect-details -mfloat-abi=softfp -march=armv7-a -mtune=cortex-a9 -mfpu=neon -mvectorize-with-neon-quad -Wno-unused-result -Wformat=0 $(SOURCES) -lm -o ./csdr

308
nmux.cpp Normal file
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@ -0,0 +1,308 @@
/*
This software is part of libcsdr, a set of simple DSP routines for
Software Defined Radio.
Copyright (c) 2014, Andras Retzler <randras@sdr.hu>
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 copyright holder 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 ANDRAS RETZLER 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 "tsmpool.h"
int host_port = 0;
char host_address[100] = "127.0.0.1";
int thread_cntr = 0;
//CLI parameters
int bufsize = 1024; //! currently unused
int bufcnt = 1024;
char* global_argv;
int global_argc;
tsmpool* pool;
void sig_handler(int signo)
{
fprintf(stderr, MSG_START "signal %d caught, exiting...\n", signo);
fflush(stderr);
exit(0);
}
int main(int argc, char* argv[])
{
global_argv = argv;
global_argc = argc;
int c;
for(;;)
{
int option_index = 0;
static struct option long_options[] = {
{"port", required_argument, 0, 'p' },
{"address", required_argument, 0, 'a' },
{"bufsize", required_argument, 0, 'b' },
{"bufcnt", required_argument, 0, 'n' }
};
c = getopt_long(argc, argv, "p:a:b:n:", long_options, &option_index);
if(c==-1) break;
switch (c)
{
case 'a':
host_address[100-1]=0;
strncpy(host_address,optarg,100-1);
break;
case 'p':
host_port=atoi(optarg);
break;
case 'b':
bufsize=atoi(optarg);
break;
case 'n':
bufcnt=atoi(optarg);
break;
case 0:
case '?':
case ':':
default:;
print_exit(MSG_START "error in getopt_long()\n");
}
}
if(!host_port) print_exit(MSG_START "missing required command line argument, --port.\n");
if(bufsize<0) print_exit(MSG_START "invalid value for --bufsize (should be >0)\n");
if(bufcnt<0) print_exit(MSG_START "invalid value for --bufcnt (should be >0)\n");
//set signals
struct sigaction sa;
memset(&sa, 0, sizeof(sa));
sa.sa_handler = sig_handler;
sigaction(SIGTERM, &sa, NULL);
sigaction(SIGKILL, &sa, NULL);
sigaction(SIGQUIT, &sa, NULL);
sigaction(SIGINT, &sa, NULL);
sigaction(SIGHUP, &sa, NULL);
struct sockaddr_in addr_host;
int listen_socket;
std::vector<client_t*> clients;
clients.reserve(100);
listen_socket=socket(AF_INET,SOCK_STREAM,0);
int sockopt = 1;
if( setsockopt(listen_socket, SOL_SOCKET, SO_REUSEADDR, (char *)&sockopt, sizeof(sockopt)) == -1 )
error_exit(MSG_START "cannot set SO_REUSEADDR"); //the best description on SO_REUSEADDR ever: http://stackoverflow.com/a/14388707/3182453
memset(&addr_host,'0',sizeof(addr_host));
addr_host.sin_family = AF_INET;
addr_host.sin_port = htons(host_port);
addr_host.sin_addr.s_addr = INADDR_ANY;
if( (addr_host.sin_addr.s_addr=inet_addr(host_address)) == INADDR_NONE )
error_exit(MSG_START "invalid host address");
if( bind(listen_socket, (struct sockaddr*) &addr_host, sizeof(addr_host)) < 0 )
error_exit(MSG_START "cannot bind() address to the socket");
if( listen(listen_socket, 10) == -1 )
error_exit(MSG_START "cannot listen() on socket");
fprintf(stderr,MSG_START "listening on %s:%d\n", inet_ntoa(addr_host.sin_addr), host_port);
struct sockaddr_in addr_cli;
socklen_t addr_cli_len = sizeof(addr_cli);
int new_socket;
int highfd = 0;
FD_ZERO(&select_fds);
FD_SET(listen_socket, &select_fds);
maxfd(&highfd, listen_socket);
FD_SET(input_fd, &select_fds);
maxfd(&highfd, input_fd);
//Set stdin and listen_socket to non-blocking
if(set_nonblocking(input_fd) || set_nonblocking(listen_socket))
error_exit(MSG_START "cannot set_nonblocking()");
//Create tsmpool
pool = new tsmpool(bufsize, bufcnt);
if(!pool->ok) print_exit(MSG_START "tsmpool failed to initialize\n");
unsigned char* current_write_buffer = pool->get_write_buffer();
int index_in_current_write_buffer = 0;
pthread_cond_t* wait_condition = new wait_condition;
pthread_cond_init(wait_condition, NULL);
for(;;)
{
//Let's wait until there is any new data to read, or any new connection!
select(highfd, &select_fds, NULL, NULL, NULL);
//Is there a new client connection?
if( (new_socket = accept(listen_socket, (struct sockaddr*)&addr_cli, &addr_cli_len)) != -1)
{
clients_close_all_finished();
//We're the parent, let's create a new client and initialize it
client_t* new_client = new client_t;
new_client->error = 0;
memcpy(&new_client->addr, &addr_cli, sizeof(new_client->addr));
new_client->socket = new_socket;
new_client->status = CS_CREATED;
new_client->tsmthread = pool->register_thread();
new_client->lpool = pool;
pthread_mutex_init(&new_client->wait_mutex, NULL);
new_client->wait_condition = wait_condition;
new_client->sleeping = 0;
if(pthread_create(&new_client->thread, NULL, client_thread , (void*)&new_client)<0)
{
clients.push_back(new_client);
fprintf(stderr, MSG_START "pthread_create() done, clients now: %d\n", clients.size());
}
else
{
fprintf(stderr, MSG_START "pthread_create() failed.\n");
}
}
if(index_in_current_write_buffer >= bufsize)
{
current_write_buffer = pool->get_write_buffer();
pthread_cond_broadcast(wait_condition);
index_in_current_write_buffer = 0;
}
int retval = read(input_fd, current_write_buffer + index_in_current_write_buffer, bufsize - index_in_current_write_buffer);
if(retval>0)
{
index_in_current_write_buffer += retval;
}
else if(retval==0)
{
//!end of input stream, close clients and exit
print_exit(MSG_START "end of input, exiting.\n")
}
}
}
#if 0
for (int i=0; i<clients.size(); i++)
{
if(write(clients[i]->pipefd[1], buf, retval)==-1)
{
if(!clients[i]->error)
{
print_client(clients[i], "lost buffer, failed to write pipe.");
clients[i]->error=1;
}
//fprintf(stderr, MSG_START "errno is %d\n", errno); //usually 11
//int wpstatus;
//int wpresult = waitpid(clients[i]->pid, &wpstatus, WNOHANG);
//fprintf(stderr, MSG_START "pid is %d\n",clients[i]->pid);
//perror("somethings wrong");
//if(wpresult == -1) print_client(clients[i], "error while waitpid()!");
//else if(wpresult == 0)
waitpid(clients[i]->pid, NULL, WNOHANG);
if(!proc_exists(clients[i]->pid))
{
//Client exited!
print_client(clients[i], "closing client from main process.");
close(clients[i]->pipefd[1]);
close(clients[i]->socket);
delete clients[i];
clients.erase(clients.begin()+i);
fprintf(stderr, MSG_START "done closing client from main process.\n");
}
}
else { if(clients[i]->error) print_client(clients[i], "pipe okay again."); clients[i]->error=0; }
}
}
//TODO: at the end, server closes pipefd[1] for client
#endif
void client_erase(client_t* client)
{
pthread_mutex_destroy(client->wait_mutex);
pthread_cond_destroy(client->wait_condition);
pool->
}
void clients_close_all_finished()
{
for(int i=0;i<clients.size();i++)
{
if(clients[i]->status == CS_THREAD_FINISHED)
{
client_erase(clients[i]);
clients.erase(i);
}
}
}
void* client_thread (void* param)
{
client_t* this_client = (client_t*)param;
this_client->status = CS_THREAD_RUNNING;
int retval;
tsmpool* lpool = this_client->lpool;
for(;;)
{
//wait until there is any data in the tsmpool for me (wait for the server process to wake me up)
for(;;)
{
char* pool_read_buffer = (char*)lpool->get_read_buffer();
if(pool_read_buffer) break;
pthread_mutex_lock(&this_client->wait_mutex);
this_client->sleeping = 1;
pthread_cond_wait(this_client->wait_condition, &this_client->wait_mutex);
}
//wait for the socket to be available for write
//read data from server global tsmpool
//write data to client socket
//have an exit condition
}
this_client->status = CS_THREAD_FINISHED;
pthread_exit(NULL);
return NULL;
}
void error_exit(const char* why)
{
perror(why); //do we need a \n at the end of (why)?
exit(1);
}
void print_exit(const char* why)
{
fprintf(stderr, "%s", why);
exit(1);
}
void maxfd(int* maxfd, int fd)
{
if(fd>=*maxfd) *maxfd=fd+1;
}

27
nmux.h Normal file
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@ -0,0 +1,27 @@
#include <stdio.h>
#include <socket.h>
#define MSG_START "nmux: "
typedef enum client_status_e
{
CS_CREATED,
CS_THREAD_RUNNING,
CS_THREAD_FINISHED
} client_status_t;
typedef struct client_s
{
struct sockaddr_in addr;
int socket;
int error; //set to non-zero on error (data transfer failed)
pthread_t thread;
tsmthread_t tsmthread;
client_status_t status;
//the following members are there to give access to some global variables inside the thread:
tsmpool* lpool; //local pool
int sleeping;
pthread_cond_t* wait_condition;
pthread_mutex_t wait_mutex;
} client_t;

5
tsmpool.h
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@ -26,8 +26,9 @@ public:
size_t get_size();
tsmpool(size_t size, int num);
void* get_write_buffer();
int register_thread();
void* get_read_buffer(int thread_id);
tsmthread_t* register_thread();
int remove_thread(tsmthread_t* thread);
void* get_read_buffer(tsmthread_t* thread);
int index_next(int index) { return (index+1==size)?0:index; }
int index_before(int index) { return (index-1<0)?size-1:index; }
}