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class netio_protoiofn{
public:
virtual void operator()(void *buf,size_t len,void *data) = 0;
};
template<typename C>
class netio_iofn : public netio_protoiofn{
private:
typedef void (C::*netio_iofn_type)(void *buf,size_t len,void *data);
C *obj;
netio_iofn_type fn;
public:
netio_iofn(C *obj,netio_iofn_type fn){
this->obj = obj;
this->fn = fn;
}
void operator()(void *buf,size_t len,void *data){
(obj->*fn)(buf,len,data);
}
};
#define NETIO_IOTYPE_PLAIN 0
#define NETIO_IOTYPE_FILE 1
class netio_iocb{
public:
int type;
void *buf;
int fd;
off_t off;
size_t len;
netio_protoiofn *cb_fn;
void *cb_data;
netio_iocb(void *buf,size_t len,netio_protoiofn *cb_fn,void *cb_data){
this->type = NETIO_IOTYPE_PLAIN;
this->buf = buf;
this->off = 0;
this->len = len;
this->cb_fn = cb_fn;
this->cb_data = cb_data;
}
netio_iocb(int fd,size_t len,netio_protoiofn *cb_fn,void *cb_data){
this->type = NETIO_IOTYPE_FILE;
this->buf = &this->fd;
this->fd = fd;
this->off = 0;
this->len = len;
this->cb_fn = cb_fn;
this->cb_data = cb_data;
}
};
#define NETIO_IOSIZE 65536
class netio{
private:
netio_iocb *read_iocb;
std::queue<netio_iocb*> write_queue;
bool readio_reen;
char readio_buf[NETIO_IOSIZE];
public:
int fd;
virtual int readidle() = 0;
netio(int fd){
this->fd = fd;
this->read_iocb = NULL;
this->readio_reen = false;
}
~netio(){
close(this->fd);
}
int readio(){
int ret;
size_t len;
netio_iocb *iocb;
if(readio_reen == true){
return -1;
}
readio_reen = true;
while(true){
if(read_iocb == NULL){
readidle();
}
iocb = read_iocb;
if(iocb->type == NETIO_IOTYPE_PLAIN){
while((ret = read(fd,(char*)iocb->buf + iocb->off,iocb->len - iocb->off)) > 0){
iocb->off += ret;
}
}else if(iocb->type == NETIO_IOTYPE_FILE){
while(true){
len = iocb->len - iocb->off;
if(len >= NETIO_IOSIZE){
len = NETIO_IOSIZE;
}
if((ret = read(fd,readio_buf,len)) <= 0){
break;
}
write(iocb->fd,readio_buf,ret);
iocb->off += ret;
}
}
if(iocb->off == iocb->len){
read_iocb = NULL;
if(iocb->cb_fn != NULL){
(*iocb->cb_fn)(iocb->buf,iocb->len,iocb->cb_data);
}else{
if(iocb->type == NETIO_IOTYPE_PLAIN){
delete (char*)iocb->buf;
}else if(iocb->type == NETIO_IOTYPE_FILE){
close(iocb->fd);
}
}
delete iocb;
}else{
break;
}
}
readio_reen = false;
return 0;
}
int readbytes(void *buf,size_t len,netio_protoiofn *cb_fn,void *cb_data){
read_iocb = new netio_iocb(buf,len,cb_fn,cb_data);
readio();
return 0;
}
int readfile(int fd,size_t len,netio_protoiofn *cb_fn,void *cb_data){
read_iocb = new netio_iocb(fd,len,cb_fn,cb_data);
readio();
return 0;
}
int writeio(){
int ret;
size_t len;
netio_iocb *iocb;
while(!write_queue.empty()){
iocb = write_queue.front();
if(iocb->type == NETIO_IOTYPE_PLAIN){
while((ret = write(fd,(char*)iocb->buf + iocb->off,iocb->len - iocb->off)) > 0){
iocb->off += ret;
}
}else if(iocb->type == NETIO_IOTYPE_FILE){
len = iocb->len - iocb->off;
if(len >= NETIO_IOSIZE){
len = NETIO_IOSIZE;
}
while((ret = sendfile(fd,iocb->fd,NULL,len)) > 0){
iocb->off += ret;
}
}
if(iocb->off == iocb->len){
write_queue.pop();
if(iocb->cb_fn != NULL){
(*iocb->cb_fn)(iocb->buf,iocb->len,iocb->cb_data);
}else{
if(iocb->type == NETIO_IOTYPE_PLAIN){
delete (char*)iocb->buf;
}else if(iocb->type == NETIO_IOTYPE_FILE){
close(iocb->fd);
}
}
delete iocb;
}else{
break;
}
}
return 0;
}
int writebytes(void *buf,size_t len,netio_protoiofn *cb_fn,void *cb_data){
write_queue.push(new netio_iocb(buf,len,cb_fn,cb_data));
writeio();
return 0;
}
int writefile(int fd,size_t len,netio_protoiofn *cb_fn,void *cb_data){
write_queue.push(new netio_iocb(fd,len,cb_fn,cb_data));
writeio();
return 0;
}
};
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