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/* iemnet
* copyright (c) 2010 IOhannes m zmölnig, IEM
*/
#include "iemnet.h"
#include <string.h>
#include <stdio.h>
#include <errno.h>
#include <sys/types.h>
#ifdef _WIN32
# include <winsock2.h>
# include <ws2tcpip.h> /* for socklen_t */
#else
# include <sys/socket.h>
#endif
#include <pthread.h>
//#define INBUFSIZE 4096L /* was 4096: size of receiving data buffer */
#define INBUFSIZE 65536L /* was 4096: size of receiving data buffer */
/* data handling */
typedef struct _iemnet_floatlist {
t_atom*argv;
size_t argc;
size_t size; // real size (might be bigger than argc)
} t_iemnet_floatlist;
t_iemnet_floatlist*iemnet__floatlist_init(t_iemnet_floatlist*cl) {
unsigned int i;
if(NULL==cl)return NULL;
for(i=0; i<cl->size; i++)
SETFLOAT((cl->argv+i), 0.f);
return cl;
}
void iemnet__floatlist_destroy(t_iemnet_floatlist*cl) {
if(NULL==cl)return;
if(cl->argv) freebytes(cl->argv, sizeof(t_atom)*cl->size);
cl->argv=NULL;
cl->argc=0;
cl->size=0;
freebytes(cl, sizeof(t_iemnet_floatlist));
}
t_iemnet_floatlist*iemnet__floatlist_create(unsigned int size) {
t_iemnet_floatlist*result=(t_iemnet_floatlist*)getbytes(sizeof(t_iemnet_floatlist));
if(NULL==result)return NULL;
result->argv = (t_atom*)getbytes(size*sizeof(t_atom));
if(NULL==result->argv) {
iemnet__floatlist_destroy(result);
return NULL;
}
result->argc=size;
result->size=size;
result=iemnet__floatlist_init(result);
return result;
}
t_iemnet_floatlist*iemnet__floatlist_resize(t_iemnet_floatlist*cl, unsigned int size) {
t_atom*tmp;
if(size<=cl->size) {
cl->argc=size;
return cl;
}
tmp=(t_atom*)getbytes(size*sizeof(t_atom));
if(NULL==tmp) return NULL;
freebytes(cl->argv, sizeof(t_atom)*cl->size);
cl->argv=tmp;
cl->argc=cl->size=size;
cl=iemnet__floatlist_init(cl);
return cl;
}
void iemnet__chunk_destroy(t_iemnet_chunk*c) {
if(NULL==c)return;
if(c->data)freebytes(c->data, c->size*sizeof(unsigned char));
c->data=NULL;
c->size=0;
freebytes(c, sizeof(t_iemnet_chunk));
}
t_iemnet_chunk* iemnet__chunk_create_empty(int size) {
t_iemnet_chunk*result=(t_iemnet_chunk*)getbytes(sizeof(t_iemnet_chunk));
if(result) {
result->size=size;
result->data=(unsigned char*)getbytes(sizeof(unsigned char)*size);
if(NULL == result->data) {
result->size=0;
iemnet__chunk_destroy(result);
return NULL;
}
memset(result->data, 0, result->size);
}
return result;
}
t_iemnet_chunk* iemnet__chunk_create_data(int size, unsigned char*data) {
t_iemnet_chunk*result=(t_iemnet_chunk*)getbytes(sizeof(t_iemnet_chunk));
if(result) {
result->size=size;
result->data=(unsigned char*)getbytes(sizeof(unsigned char)*size);
if(NULL == result->data) {
result->size=0;
iemnet__chunk_destroy(result);
return NULL;
}
memcpy(result->data, data, result->size);
}
return result;
}
t_iemnet_chunk* iemnet__chunk_create_list(int argc, t_atom*argv) {
t_iemnet_chunk*result=(t_iemnet_chunk*)getbytes(sizeof(t_iemnet_chunk));
int i;
if(NULL==result)return NULL;
result->size=argc;
result->data=(unsigned char*)getbytes(sizeof(unsigned char)*argc);
if(NULL == result->data) {
result->size=0;
iemnet__chunk_destroy(result);
return NULL;
}
for(i=0; i<argc; i++) {
unsigned char c = atom_getint(argv);
result->data[i]=c;
argv++;
}
return result;
}
t_iemnet_chunk*iemnet__chunk_create_chunk(t_iemnet_chunk*c) {
t_iemnet_chunk*result=NULL;
if(NULL==c)return NULL;
result=(t_iemnet_chunk*)getbytes(sizeof(t_iemnet_chunk));
result->size=c->size;
result->data=(unsigned char*)getbytes(sizeof(unsigned char)*(result->size));
if(NULL == result->data) {
result->size=0;
iemnet__chunk_destroy(result);
return NULL;
}
memcpy(result->data, c->data, result->size);
return result;
}
t_iemnet_floatlist*iemnet__chunk2list(t_iemnet_chunk*c, t_iemnet_floatlist*dest) {
unsigned int i;
if(NULL==c)return NULL;
dest=iemnet__floatlist_resize(dest, c->size);
if(NULL==dest)return NULL;
for(i=0; i<c->size; i++) {
dest->argv[i].a_w.w_float = c->data[i];
}
return dest;
}
/* queue handling */
/*
* using code found at http://newsgroups.derkeiler.com/Archive/Comp/comp.programming.threads/2008-02/msg00502.html
*/
typedef struct _node {
struct _node* next;
t_iemnet_chunk*data;
} t_node;
typedef struct _queue {
t_node* head; /* = 0 */
t_node* tail; /* = 0 */
pthread_mutex_t mtx;
pthread_cond_t cond;
int done; // in cleanup state
int size;
} t_queue;
int queue_push(
t_queue* const _this,
t_iemnet_chunk* const data
) {
t_node* tail;
t_node* n=NULL;
int size=_this->size;
if(NULL == data) return size;
//fprintf(stderr, "pushing %d bytes\n", data->size);
n=(t_node*)getbytes(sizeof(t_node));
n->next = 0;
n->data = data;
pthread_mutex_lock(&_this->mtx);
if (! (tail = _this->tail)) {
_this->head = n;
} else {
tail->next = n;
}
_this->tail = n;
_this->size+=data->size;
size=_this->size;
//fprintf(stderr, "pushed %d bytes\n", data->size);
pthread_mutex_unlock(&_this->mtx);
pthread_cond_signal(&_this->cond);
return size;
}
t_iemnet_chunk* queue_pop_block(
t_queue* const _this
) {
t_node* head=0;
t_iemnet_chunk*data=0;
pthread_mutex_lock(&_this->mtx);
while (! (head = _this->head)) {
if(_this->done) {
pthread_mutex_unlock(&_this->mtx);
return NULL;
}
else {
pthread_cond_wait(&_this->cond, &_this->mtx);
}
}
if (! (_this->head = head->next)) {
_this->tail = 0;
}
if(head && head->data) {
_this->size-=head->data->size;
}
pthread_mutex_unlock(&_this->mtx);
if(head) {
data=head->data;
freebytes(head, sizeof(t_node));
head=NULL;
}
return data;
}
t_iemnet_chunk* queue_pop_noblock(
t_queue* const _this
) {
t_node* head=0;
t_iemnet_chunk*data=0;
pthread_mutex_lock(&_this->mtx);
if (! (head = _this->head)) {
// empty head
pthread_mutex_unlock(&_this->mtx);
return NULL;
}
if (! (_this->head = head->next)) {
_this->tail = 0;
}
if(head && head->data) {
_this->size-=head->data->size;
}
pthread_mutex_unlock(&_this->mtx);
if(head) {
data=head->data;
freebytes(head, sizeof(t_node));
head=NULL;
}
return data;
}
t_iemnet_chunk* queue_pop(t_queue* const _this) {
return queue_pop_block(_this);
}
void queue_finish(t_queue* q) {
if(NULL==q)
return;
q->done=1;
pthread_cond_signal(&q->cond);
}
void queue_destroy(t_queue* q) {
t_iemnet_chunk*c=NULL;
if(NULL==q)
return;
queue_finish(q);
/* remove all the chunks from the queue */
while(NULL!=(c=queue_pop_noblock(q))) {
iemnet__chunk_destroy(c);
}
q->head=NULL;
q->tail=NULL;
pthread_mutex_destroy(&q->mtx);
pthread_cond_destroy(&q->cond);
freebytes(q, sizeof(t_queue));
q=NULL;
}
t_queue* queue_create(void) {
static pthread_mutex_t mtx = PTHREAD_MUTEX_INITIALIZER;
static pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
t_queue*q=(t_queue*)getbytes(sizeof(t_queue));
if(NULL==q)return NULL;
q->head = NULL;
q->tail = NULL;
memcpy(&q->cond, &cond, sizeof(pthread_cond_t));
memcpy(&q->mtx , &mtx, sizeof(pthread_mutex_t));
q->done = 0;
q->size = 0;
return q;
}
/* draft:
* - there is a sender thread for each open connection
* - the main thread just adds chunks to each sender threads processing queue
* - the sender thread tries to send the queue as fast as possible
*/
struct _iemnet_sender {
pthread_t thread;
int sockfd; /* owned outside; must call iemnet__sender_destroy() before freeing socket yourself */
t_queue*queue;
int cont; // indicates whether we want to thread to continue or to terminate
};
/* the workhorse of the family */
static int iemnet__sender_dosend(int sockfd, t_queue*q) {
t_iemnet_chunk*c=queue_pop(q);
if(c) {
unsigned char*data=c->data;
unsigned int size=c->size;
int result=-1;
// fprintf(stderr, "sending %d bytes at %x to %d\n", size, data, sockfd);
result = send(sockfd, data, size, 0);
// shouldn't we do something with the result here?
iemnet__chunk_destroy(c);
} else {
return 0;
}
return 1;
}
static void*iemnet__sender_sendthread(void*arg) {
t_iemnet_sender*sender=(t_iemnet_sender*)arg;
int sockfd=sender->sockfd;
t_queue*q=sender->queue;
while(sender->cont) {
if(!iemnet__sender_dosend(sockfd, q))break;
}
//fprintf(stderr, "write thread terminated\n");
return NULL;
}
int iemnet__sender_send(t_iemnet_sender*s, t_iemnet_chunk*c) {
t_queue*q=s->queue;
int size=0;
if(q) {
t_iemnet_chunk*chunk=iemnet__chunk_create_chunk(c);
size = queue_push(q, chunk);
}
return size;
}
void iemnet__sender_destroy(t_iemnet_sender*s) {
s->cont=0;
queue_finish(s->queue);
s->sockfd = -1;
pthread_join(s->thread, NULL);
queue_destroy(s->queue);
freebytes(s, sizeof(t_iemnet_sender));
s=NULL;
}
t_iemnet_sender*iemnet__sender_create(int sock) {
t_iemnet_sender*result=(t_iemnet_sender*)getbytes(sizeof(t_iemnet_sender));
int res=0;
if(NULL==result)return NULL;
result->queue = queue_create();
result->sockfd = sock;
result->cont =1;
res=pthread_create(&result->thread, 0, iemnet__sender_sendthread, result);
if(0==res) {
} else {
// something went wrong
}
return result;
}
int iemnet__sender_getlasterror(t_iemnet_sender*x) {
x=NULL;
#ifdef _WIN32
return WSAGetLastError();
#endif
return errno;
}
int iemnet__sender_getsockopt(t_iemnet_sender*s, int level, int optname, void *optval, socklen_t*optlen) {
int result=getsockopt(s->sockfd, level, optname, optval, optlen);
if(result!=0) {
post("%s: getsockopt returned %d", __FUNCTION__, iemnet__sender_getlasterror(s));
}
return result;
}
int iemnet__sender_setsockopt(t_iemnet_sender*s, int level, int optname, const void*optval, socklen_t optlen) {
int result=setsockopt(s->sockfd, level, optname, optval, optlen);
if(result!=0) {
post("%s: setsockopt returned %d", __FUNCTION__, iemnet__sender_getlasterror(s));
}
return result;
}
struct _iemnet_receiver {
pthread_t thread;
int sockfd; /* owned outside; you must call iemnet__receiver_destroy() before freeing socket yourself */
void*userdata;
t_iemnet_chunk*data;
t_iemnet_receivecallback callback;
t_queue*queue;
int running;
t_clock *clock;
t_iemnet_floatlist*flist;
};
/* the workhorse of the family */
static void*iemnet__receiver_readthread(void*arg) {
int result = 0;
t_iemnet_receiver*receiver=(t_iemnet_receiver*)arg;
int sockfd=receiver->sockfd;
t_queue*q=receiver->queue;
unsigned char data[INBUFSIZE];
unsigned int size=INBUFSIZE;
unsigned int i=0;
for(i=0; i<size; i++)data[i]=0;
receiver->running=1;
while(1) {
t_iemnet_chunk*c=NULL;
//fprintf(stderr, "reading %d bytes...\n", size);
result = recv(sockfd, data, size, 0);
//fprintf(stderr, "read %d bytes...\n", result);
if(result<=0)break;
c= iemnet__chunk_create_data(result, data);
queue_push(q, c);
if(receiver->clock)clock_delay(receiver->clock, 0);
}
if(result>=0)
if(receiver->clock)clock_delay(receiver->clock, 0);
receiver->running=0;
//fprintf(stderr, "read thread terminated\n");
return NULL;
}
static void iemnet__receiver_tick(t_iemnet_receiver *x)
{
// received data
t_iemnet_chunk*c=queue_pop_noblock(x->queue);
while(NULL!=c) {
x->flist = iemnet__chunk2list(c, x->flist);
(x->callback)(x->userdata, x->flist->argc, x->flist->argv);
iemnet__chunk_destroy(c);
c=queue_pop_noblock(x->queue);
}
if(!x->running) {
// read terminated
x->callback(x->userdata, 0, NULL);
}
}
t_iemnet_receiver*iemnet__receiver_create(int sock, void*userdata, t_iemnet_receivecallback callback) {
t_iemnet_receiver*rec=(t_iemnet_receiver*)getbytes(sizeof(t_iemnet_receiver));
//fprintf(stderr, "new receiver for %d\t%x\t%x\n", sock, userdata, callback);
if(rec) {
t_iemnet_chunk*data=iemnet__chunk_create_empty(INBUFSIZE);
int res=0;
if(NULL==data) {
iemnet__receiver_destroy(rec);
return NULL;
}
rec->sockfd=sock;
rec->userdata=userdata;
rec->data=data;
rec->callback=callback;
rec->flist=iemnet__floatlist_create(1024);
rec->queue = queue_create();
rec->clock = clock_new(rec, (t_method)iemnet__receiver_tick);
rec->running=1;
res=pthread_create(&rec->thread, 0, iemnet__receiver_readthread, rec);
}
//fprintf(stderr, "new receiver created\n");
return rec;
}
void iemnet__receiver_destroy(t_iemnet_receiver*rec) {
if(NULL==rec)return;
if(rec->data)iemnet__chunk_destroy(rec->data);
if(rec->flist)iemnet__floatlist_destroy(rec->flist);
clock_free(rec->clock);
rec->clock=NULL;
shutdown(rec->sockfd, 2); /* needed on linux, since the recv won't shutdown on sys_closesocket() alone */
sys_closesocket(rec->sockfd);
rec->sockfd=0;
pthread_join(rec->thread, NULL);
rec->userdata=NULL;
rec->data=NULL;
rec->callback=NULL;
rec->clock=NULL;
rec->flist=NULL;
freebytes(rec, sizeof(t_iemnet_receiver));
rec=NULL;
}
#ifdef _MSC_VER
void tcpclient_setup(void);
void tcpserver_setup(void);
void tcpsend_setup(void);
#endif
IEMNET_EXTERN void iemnet_setup(void) {
#ifdef _MSC_VER
tcpclient_setup();
tcpserver_setup();
tcpserver_setup();
#endif
}
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