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Faster aligned read/write

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This commit is contained in:
Shoghi Cervantes 2014-04-14 12:34:57 +02:00
parent e9aba34e6b
commit 3729c5b603
1 changed files with 25 additions and 7 deletions
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32
src/pocketmine/level/format/anvil/RegionLoader.php
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@ -52,7 +52,7 @@ class RegionLoader{
touch($this->filePath);
$this->filePointer = fopen($this->filePath, "r+b");
flock($this->filePointer, LOCK_EX);
stream_set_read_buffer($this->filePointer, 4096);
stream_set_read_buffer($this->filePointer, 1024 * 16); //16KB
stream_set_write_buffer($this->filePointer, 1024 * 16); //16KB
if(!file_exists($this->filePath)){
$this->createBlank();
@ -195,38 +195,56 @@ class RegionLoader{
private function loadLocationTable(){
fseek($this->filePointer, 0);
$this->lastSector = 1;
$table = fread($this->filePointer, 4 * 1024 * 2);
for($i = 0; $i < 1024; ++$i){
$index = Binary::readInt(fread($this->filePointer, 4));
$index = Binary::readInt(substr($table, $i << 2, 4));
$this->locationTable[$i] = array(($index & ~0xff) >> 8, $index & 0xff);
if(($this->locationTable[$i][0] + $this->locationTable[$i][1] - 1) > $this->lastSector){
$this->lastSector = $this->locationTable[$i][0] + $this->locationTable[$i][1] - 1;
}
}
//Time of modification
for($i = 0; $i < 1024; ++$i){
$this->locationTable[$i][2] = Binary::readInt(substr($table, 4096 + ($i << 2), 4));
}
}
private function writeLocationTable(){
fseek($this->filePointer, 0);
$table = "";
for($i = 0; $i < 1024; ++$i){
fwrite($this->filePointer, Binary::writeInt(($this->locationTable[$i][0] << 8) | $this->locationTable[$i][1]));
$table .= Binary::writeInt(($this->locationTable[$i][0] << 8) | $this->locationTable[$i][1]);
}
for($i = 0; $i < 1024; ++$i){
$table .= Binary::writeInt($this->locationTable[$i][2]);
}
fseek($this->filePointer, 0);
fwrite($this->filePointer, $table, 4096 * 2);
}
private function writeLocationIndex($index){
fseek($this->filePointer, $index << 2);
fwrite($this->filePointer, Binary::writeInt(($this->locationTable[$index][0] << 8) | $this->locationTable[$index][1]));
fwrite($this->filePointer, Binary::writeInt(($this->locationTable[$index][0] << 8) | $this->locationTable[$index][1]), 4);
fseek($this->filePointer, 4096 + ($index << 2));
fwrite($this->filePointer, Binary::writeInt($this->locationTable[$index][2]), 4);
}
private function createBlank(){
fseek($this->filePointer, 0);
ftruncate($this->filePointer, 0);
$this->lastSector = 1;
$table = "";
for($i = 0; $i < 1024; ++$i){
$this->locationTable[$i] = array(0, 0);
fwrite($this->filePointer, Binary::writeInt(0));
$table .= Binary::writeInt(0);
}
$time = time();
for($i = 0; $i < 1024; ++$i){
fwrite($this->filePointer, Binary::writeInt(0));
$table .= Binary::writeInt($time);
}
fwrite($this->filePointer, $table, 4096 * 2);
}
public function getX(){