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godot/core/io/file_access_network.cpp
Rémi Verschelde d8223ffa75 Welcome in 2017, dear changelog reader! 
That year should bring the long-awaited OpenGL ES 3.0 compatible renderer
with state-of-the-art rendering techniques tuned to work as low as middle
end handheld devices - without compromising with the possibilities given
for higher end desktop games of course. Great times ahead for the Godot
community and the gamers that will play our games!

(cherry picked from commit c7bc44d5ad)
2017-01-12 19:15:30 +01:00

568 lines
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/*************************************************************************/
/* file_access_network.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in 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: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* 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 AUTHORS 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 IN THE SOFTWARE. */
/*************************************************************************/
#include "file_access_network.h"
#include "marshalls.h"
#include "globals.h"
#include "os/os.h"
#include "io/ip.h"
//#define DEBUG_PRINT(m_p) print_line(m_p)
//#define DEBUG_TIME(m_what) printf("MS: %s - %lli\n",m_what,OS::get_singleton()->get_ticks_usec());
#define DEBUG_PRINT(m_p)
#define DEBUG_TIME(m_what)
void FileAccessNetworkClient::lock_mutex() {
mutex->lock();
lockcount++;
}
void FileAccessNetworkClient::unlock_mutex() {
lockcount--;
mutex->unlock();
}
void FileAccessNetworkClient::put_32(int p_32) {
uint8_t buf[4];
encode_uint32(p_32,buf);
client->put_data(buf,4);
DEBUG_PRINT("put32: "+itos(p_32));
}
void FileAccessNetworkClient::put_64(int64_t p_64) {
uint8_t buf[8];
encode_uint64(p_64,buf);
client->put_data(buf,8);
DEBUG_PRINT("put64: "+itos(p_64));
}
int FileAccessNetworkClient::get_32() {
uint8_t buf[4];
client->get_data(buf,4);
return decode_uint32(buf);
}
int64_t FileAccessNetworkClient::get_64() {
uint8_t buf[8];
client->get_data(buf,8);
return decode_uint64(buf);
}
void FileAccessNetworkClient::_thread_func() {
client->set_nodelay(true);
while(!quit) {
DEBUG_PRINT("SEM WAIT - "+itos(sem->get()));
Error err = sem->wait();
DEBUG_TIME("sem_unlock");
//DEBUG_PRINT("semwait returned "+itos(werr));
DEBUG_PRINT("MUTEX LOCK "+itos(lockcount));
DEBUG_PRINT("POPO");
DEBUG_PRINT("PEPE");
lock_mutex();
DEBUG_PRINT("MUTEX PASS");
blockrequest_mutex->lock();
while(block_requests.size()) {
put_32(block_requests.front()->get().id);
put_32(FileAccessNetwork::COMMAND_READ_BLOCK);
put_64(block_requests.front()->get().offset);
put_32(block_requests.front()->get().size);
block_requests.pop_front();
}
blockrequest_mutex->unlock();
DEBUG_PRINT("THREAD ITER");
DEBUG_TIME("sem_read");
int id = get_32();
int response = get_32();
DEBUG_PRINT("GET RESPONSE: "+itos(response));
FileAccessNetwork *fa=NULL;
if (response!=FileAccessNetwork::RESPONSE_DATA) {
ERR_FAIL_COND(!accesses.has(id));
}
if (accesses.has(id))
fa=accesses[id];
switch(response) {
case FileAccessNetwork::RESPONSE_OPEN: {
DEBUG_TIME("sem_open");
int status = get_32();
if (status!=OK) {
fa->_respond(0,Error(status));
} else {
uint64_t len = get_64();
fa->_respond(len,Error(status));
}
fa->sem->post();
} break;
case FileAccessNetwork::RESPONSE_DATA: {
int64_t offset = get_64();
uint32_t len = get_32();
Vector<uint8_t> block;
block.resize(len);
client->get_data(block.ptr(),len);
if (fa) //may have been queued
fa->_set_block(offset,block);
} break;
case FileAccessNetwork::RESPONSE_FILE_EXISTS: {
int status = get_32();
fa->exists_modtime=status!=0;
fa->sem->post();
} break;
case FileAccessNetwork::RESPONSE_GET_MODTIME: {
uint64_t status = get_64();
fa->exists_modtime=status;
fa->sem->post();
} break;
}
unlock_mutex();
}
}
void FileAccessNetworkClient::_thread_func(void *s) {
FileAccessNetworkClient *self =(FileAccessNetworkClient*)s;
self->_thread_func();
}
Error FileAccessNetworkClient::connect(const String& p_host,int p_port,const String& p_password) {
IP_Address ip;
if (p_host.is_valid_ip_address()) {
ip=p_host;
} else {
ip=IP::get_singleton()->resolve_hostname(p_host);
}
DEBUG_PRINT("IP: "+String(ip)+" port "+itos(p_port));
Error err = client->connect(ip,p_port);
ERR_FAIL_COND_V(err,err);
while(client->get_status()==StreamPeerTCP::STATUS_CONNECTING) {
//DEBUG_PRINT("trying to connect....");
OS::get_singleton()->delay_usec(1000);
}
if (client->get_status()!=StreamPeerTCP::STATUS_CONNECTED) {
return ERR_CANT_CONNECT;
}
CharString cs = p_password.utf8();
put_32(cs.length());
client->put_data((const uint8_t*)cs.ptr(),cs.length());
int e = get_32();
if (e!=OK) {
return ERR_INVALID_PARAMETER;
}
thread = Thread::create(_thread_func,this);
return OK;
}
FileAccessNetworkClient *FileAccessNetworkClient::singleton=NULL;
FileAccessNetworkClient::FileAccessNetworkClient() {
thread=NULL;
mutex = Mutex::create();
blockrequest_mutex = Mutex::create();
quit=false;
singleton=this;
last_id=0;
client = Ref<StreamPeerTCP>( StreamPeerTCP::create_ref() );
sem=Semaphore::create();
lockcount=0;
}
FileAccessNetworkClient::~FileAccessNetworkClient() {
if (thread) {
quit=true;
sem->post();
Thread::wait_to_finish(thread);
memdelete(thread);
}
memdelete(blockrequest_mutex);
memdelete(mutex);
memdelete(sem);
}
void FileAccessNetwork::_set_block(size_t p_offset,const Vector<uint8_t>& p_block) {
int page = p_offset/page_size;
ERR_FAIL_INDEX(page,pages.size());
if (page<pages.size()-1) {
ERR_FAIL_COND(p_block.size()!=page_size);
} else {
ERR_FAIL_COND( (p_block.size() != (total_size%page_size)));
}
buffer_mutex->lock();
pages[page].buffer=p_block;
pages[page].queued=false;
buffer_mutex->unlock();
if (waiting_on_page==page) {
waiting_on_page=-1;
page_sem->post();
}
}
void FileAccessNetwork::_respond(size_t p_len,Error p_status) {
DEBUG_PRINT("GOT RESPONSE - len: "+itos(p_len)+" status: "+itos(p_status));
response=p_status;
if (response!=OK)
return;
opened=true;
total_size=p_len;
int pc = ((total_size-1)/page_size)+1;
pages.resize(pc);
}
Error FileAccessNetwork::_open(const String& p_path, int p_mode_flags) {
ERR_FAIL_COND_V(p_mode_flags!=READ,ERR_UNAVAILABLE);
if (opened)
close();
FileAccessNetworkClient *nc = FileAccessNetworkClient::singleton;
DEBUG_PRINT("open: "+p_path);
DEBUG_TIME("open_begin");
nc->lock_mutex();
nc->put_32(id);
nc->accesses[id]=this;
nc->put_32(COMMAND_OPEN_FILE);
CharString cs =p_path.utf8();
nc->put_32(cs.length());
nc->client->put_data((const uint8_t*)cs.ptr(),cs.length());
pos=0;
eof_flag=false;
last_page=-1;
last_page_buff=NULL;
// buffers.clear();
nc->unlock_mutex();
DEBUG_PRINT("OPEN POST");
DEBUG_TIME("open_post");
nc->sem->post(); //awaiting answer
DEBUG_PRINT("WAIT...");
sem->wait();
DEBUG_TIME("open_end");
DEBUG_PRINT("WAIT ENDED...");
return response;
}
void FileAccessNetwork::close(){
if (!opened)
return;
FileAccessNetworkClient *nc = FileAccessNetworkClient::singleton;
DEBUG_PRINT("CLOSE");
nc->lock_mutex();
nc->put_32(id);
nc->put_32(COMMAND_CLOSE);
pages.clear();
opened=false;
nc->unlock_mutex();
}
bool FileAccessNetwork::is_open() const{
return opened;
}
void FileAccessNetwork::seek(size_t p_position){
ERR_FAIL_COND(!opened);
eof_flag=p_position>total_size;
if (p_position>=total_size) {
p_position=total_size;
}
pos=p_position;
}
void FileAccessNetwork::seek_end(int64_t p_position){
seek(total_size+p_position);
}
size_t FileAccessNetwork::get_pos() const{
ERR_FAIL_COND_V(!opened,0);
return pos;
}
size_t FileAccessNetwork::get_len() const{
ERR_FAIL_COND_V(!opened,0);
return total_size;
}
bool FileAccessNetwork::eof_reached() const{
ERR_FAIL_COND_V(!opened,false);
return eof_flag;
}
uint8_t FileAccessNetwork::get_8() const{
uint8_t v;
get_buffer(&v,1);
return v;
}
void FileAccessNetwork::_queue_page(int p_page) const {
if (p_page>=pages.size())
return;
if (pages[p_page].buffer.empty() && !pages[p_page].queued) {
FileAccessNetworkClient *nc = FileAccessNetworkClient::singleton;
nc->blockrequest_mutex->lock();
FileAccessNetworkClient::BlockRequest br;
br.id=id;
br.offset=size_t(p_page)*page_size;
br.size=page_size;
nc->block_requests.push_back(br);
pages[p_page].queued=true;
nc->blockrequest_mutex->unlock();
DEBUG_PRINT("QUEUE PAGE POST");
nc->sem->post();
DEBUG_PRINT("queued "+itos(p_page));
}
}
int FileAccessNetwork::get_buffer(uint8_t *p_dst, int p_length) const{
//bool eof=false;
if (pos+p_length>total_size) {
eof_flag=true;
}
if (pos+p_length>=total_size) {
p_length=total_size-pos;
}
// FileAccessNetworkClient *nc = FileAccessNetworkClient::singleton;
uint8_t *buff=last_page_buff;
for(int i=0;i<p_length;i++) {
int page=pos/page_size;
if (page!=last_page) {
buffer_mutex->lock();
if (pages[page].buffer.empty()) {
//fuck
waiting_on_page=page;
for(int j=0;j<read_ahead;j++) {
_queue_page(page+j);
}
buffer_mutex->unlock();
DEBUG_PRINT("wait");
page_sem->wait();
DEBUG_PRINT("done");
} else {
for(int j=0;j<read_ahead;j++) {
_queue_page(page+j);
}
buff=pages[page].buffer.ptr();
//queue pages
buffer_mutex->unlock();
}
buff=pages[page].buffer.ptr();
last_page_buff=buff;
last_page=page;
}
p_dst[i]=buff[pos-uint64_t(page)*page_size];
pos++;
}
return p_length;
}
Error FileAccessNetwork::get_error() const{
return pos==total_size?ERR_FILE_EOF:OK;
}
void FileAccessNetwork::store_8(uint8_t p_dest) {
ERR_FAIL();
}
bool FileAccessNetwork::file_exists(const String& p_path){
FileAccessNetworkClient *nc = FileAccessNetworkClient::singleton;
nc->lock_mutex();
nc->put_32(id);
nc->put_32(COMMAND_FILE_EXISTS);
CharString cs=p_path.utf8();
nc->put_32(cs.length());
nc->client->put_data((const uint8_t*)cs.ptr(),cs.length());
nc->unlock_mutex();
DEBUG_PRINT("FILE EXISTS POST");
nc->sem->post();
sem->wait();
return exists_modtime!=0;
}
uint64_t FileAccessNetwork::_get_modified_time(const String& p_file){
FileAccessNetworkClient *nc = FileAccessNetworkClient::singleton;
nc->lock_mutex();
nc->put_32(id);
nc->put_32(COMMAND_GET_MODTIME);
CharString cs=p_file.utf8();
nc->put_32(cs.length());
nc->client->put_data((const uint8_t*)cs.ptr(),cs.length());
nc->unlock_mutex();
DEBUG_PRINT("MODTIME POST");
nc->sem->post();
sem->wait();
return exists_modtime;
}
FileAccessNetwork::FileAccessNetwork() {
eof_flag=false;
opened=false;
pos=0;
sem=Semaphore::create();
page_sem=Semaphore::create();
buffer_mutex=Mutex::create();
FileAccessNetworkClient *nc = FileAccessNetworkClient::singleton;
nc->lock_mutex();
id=nc->last_id++;
nc->accesses[id]=this;
nc->unlock_mutex();
page_size = GLOBAL_DEF("remote_fs/page_size",65536);
read_ahead = GLOBAL_DEF("remote_fs/page_read_ahead",4);
max_pages = GLOBAL_DEF("remote_fs/max_pages",20);
last_activity_val=0;
waiting_on_page=-1;
last_page=-1;
}
FileAccessNetwork::~FileAccessNetwork() {
close();
memdelete(sem);
memdelete(page_sem);
memdelete(buffer_mutex);
FileAccessNetworkClient *nc = FileAccessNetworkClient::singleton;
nc->lock_mutex();
id=nc->last_id++;
nc->accesses.erase(id);
nc->unlock_mutex();
}
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