PHP obtainLock Exemples

Exemple #1

Fichier : dwpage.php Projet : stretchyboy/dokuwiki

     saveWikiText($WIKI_ID, file_get_contents($TARGET_FN), $OPTS->get('m'), $OPTS->has('t'));
     clearLock($WIKI_ID);
     exit(0);
     break;
     #----------------------------------------------------------------------
 #----------------------------------------------------------------------
 case 'lock':
     $WIKI_ID = $OPTS->arg(1);
     if (!$WIKI_ID) {
         fwrite(STDERR, "Wiki page ID required\n");
         exit(1);
     }
     if ($OPTS->has('f')) {
         deleteLock($WIKI_ID);
     }
     obtainLock($WIKI_ID);
     print "Locked : {$WIKI_ID}\n";
     exit(0);
     break;
     #----------------------------------------------------------------------
 #----------------------------------------------------------------------
 case 'unlock':
     $WIKI_ID = $OPTS->arg(1);
     if (!$WIKI_ID) {
         fwrite(STDERR, "Wiki page ID required\n");
         exit(1);
     }
     if ($OPTS->has('f')) {
         deleteLock($WIKI_ID);
     } else {
         clearLock($WIKI_ID);

Exemple #2

Fichier : sync-mutex.php Projet : silentred/learning-path

<?php

$mutex = new SyncMutex("UniqueName");
for ($i = 0; $i < 2; $i++) {
    $pid = pcntl_fork();
    if ($pid < 0) {
        die("fork failed");
    } elseif ($pid > 0) {
        echo "parent process \n";
    } else {
        echo "child process {$i} is born. \n";
        obtainLock($mutex, $i);
    }
}
while (pcntl_waitpid(0, $status) != -1) {
    $status = pcntl_wexitstatus($status);
    echo "Child {$status} completed\n";
}
function obtainLock($mutex, $i)
{
    echo "process {$i} is getting the mutex \n";
    $res = $mutex->lock(200);
    sleep(1);
    if (!$res) {
        echo "process {$i} unable to lock mutex. \n";
    } else {
        echo "process {$i} successfully got the mutex \n";
        $mutex->unlock();
    }
    exit;
}

Exemple #3

Fichier : sysvsem.php Projet : silentred/learning-path

<?php

$key = ftok('/tmp', 'c');
$sem = sem_get($key);
for ($i = 0; $i < 2; $i++) {
    $pid = pcntl_fork();
    if ($pid < 0) {
        die("fork failed");
    } elseif ($pid > 0) {
        //echo "parent process \n";
    } else {
        echo "child process {$i} is born. \n";
        obtainLock($sem, $i);
    }
}
while (pcntl_waitpid(0, $status) != -1) {
    $status = pcntl_wexitstatus($status);
    echo "Child {$status} completed\n";
}
sem_remove($sem);
// finally remove the sem
function obtainLock($sem, $i)
{
    echo "process {$i} is getting the sem \n";
    $res = sem_acquire($sem, true);
    sleep(1);
    if (!$res) {
        echo "process {$i} unable to get sem. \n";
    } else {
        echo "process {$i} successfully got the sem \n";
        sem_release($sem);

Exemple #4

Fichier : sync-sem.php Projet : silentred/learning-path

<?php

$lock = new SyncSemaphore("UniqueName", 2);
for ($i = 0; $i < 2; $i++) {
    $pid = pcntl_fork();
    if ($pid < 0) {
        die("fork failed");
    } elseif ($pid > 0) {
        echo "parent process \n";
    } else {
        echo "child process {$i} is born. \n";
        obtainLock($lock, $i);
    }
}
while (pcntl_waitpid(0, $status) != -1) {
    $status = pcntl_wexitstatus($status);
    echo "Child {$status} completed\n";
}
function obtainLock($lock, $i)
{
    echo "process {$i} is getting the lock \n";
    $res = $lock->lock(200);
    sleep(1);
    if (!$res) {
        echo "process {$i} unable to lock lock. \n";
    } else {
        echo "process {$i} successfully got the lock \n";
        $lock->unlock();
    }
    exit;
}