php进程(线程)通信基础之System V共享内存简单实例分析

$ftok = ftok(__FILE__, 'a');

$id = shm_attach ( $ftok, 1000 , 0666 )

shm_detach ( $id )

$val = shm_get_var ( $id , $key )

shm_has_var ( $id , $key )

shm_put_var ( $id , $key , $val )

shm_remove_var ( $id , $key )

shm_remove ( $id)

<?php
$tmp = tempnam(__FILE__, 'PHP');
$key = ftok($tmp, 'a');
$shmid = shm_attach($key);
$counter = 0;
shm_put_var( $shmid, 1, $counter );
class CounterThread extends Thread {
 public $shmid;
 public $is_runing = true;
 public function __construct($shmid){
  $this->shmid = $shmid;
 }
 public function run() {
  $counter = shm_get_var( $this->shmid, 1 );
  $counter++;
  shm_put_var( $this->shmid, 1, $counter );
  printf("Thread #%lu says: %s\n", $this->getThreadId(),$counter);
 }
}
for ($i=0;$i<10;$i++){
 $threads[] = new CounterThread($shmid);
}
for ($i=0;$i<10;$i++){
 $threads[$i]->start();
}
for ($i=0;$i<10;$i++){
 $threads[$i]->join();
}
shm_remove( $shmid );
shm_detach( $shmid );