/**
* @param ServerEvent $event
*/
public function bindPnctlEvent(ServerEvent $event)
{
if (!extension_loaded('pcntl')) {
return;
}
$loop = $event->getEventLoop();
$server = $event->getServer();
$pnctlEmitter = new PnctlEmitter($loop);
$pnctlEmitter->on(SIGTERM, function () use($server, $loop) {
$server->emit('end');
$server->shutdown();
$loop->stop();
$this->logger->notice('Server stopped !');
});
$pnctlEmitter->on(SIGINT, function () use($server, $loop) {
$this->logger->notice('Press CTLR+C again to stop the server');
if (SIGINT === pcntl_sigtimedwait([SIGINT], $siginfo, 5)) {
$this->logger->notice('Stopping server ...');
$server->emit('end');
$server->shutdown();
foreach ($this->periodicRegistry->getPeriodics() as $periodic) {
if ($periodic instanceof TimerInterface && $loop->isTimerActive($periodic)) {
$loop->cancelTimer($periodic);
}
}
$loop->stop();
$this->logger->notice('Server stopped !');
} else {
$this->logger->notice('CTLR+C not pressed, continue to run normally');
}
});
}
protected function serverLoop()
{
while ($this->_listenLoop) {
if (($client = @socket_accept($this->sockServer)) === false) {
$info = array();
if (pcntl_sigtimedwait(array(SIGUSR1), $info, 1) > 0) {
if ($info['signo'] == SIGUSR1) {
$this->handleProcess();
}
}
continue;
}
$socketClient = new SocketClientBroadcast($client, $this);
if (is_array($this->connectionHandler)) {
$object = $this->connectionHandler[0];
$method = $this->connectionHandler[1];
$childPid = $object->{$method}($socketClient);
} else {
$function = $this->connectionHandler;
$childPid = $function($socketClient);
}
if (!$childPid) {
// force child process to exit from loop
return;
}
$this->connections[$childPid] = $socketClient;
}
}
/**
* @param ServerEvent $event
*/
public function bindPnctlEvent(ServerEvent $event)
{
if (!extension_loaded('pcntl')) {
return;
}
$loop = $event->getEventLoop();
$server = $event->getServer();
$pnctlEmitter = new PnctlEmitter($loop);
$pnctlEmitter->on(SIGTERM, function () use($server, $loop) {
$this->closure($server, $loop);
});
$pnctlEmitter->on(SIGINT, function () use($pnctlEmitter) {
$this->logger->notice('Press CTLR+C again to stop the server');
if (SIGINT === pcntl_sigtimedwait([SIGINT], $siginfo, 5)) {
$pnctlEmitter->emit(SIGTERM);
} else {
$this->logger->notice('CTLR+C not pressed, continue to run normally');
}
});
}
/**
* 次のトリガまで待機
*
* @param int $sec
*/
public function wait($sec)
{
$limit = microtime(true) + $sec;
for (;;) {
$sec = (int) ($limit - microtime(true) + 1);
if ($sec < 1) {
return true;
}
if ($signo = pcntl_sigtimedwait($this->_sigset, $info, $sec)) {
switch ($signo) {
case SIGTERM:
case SIGINT:
case SIGHUP:
return false;
case SIGUSR2:
return true;
}
}
}
}
function sigSleep($secs = 10)
{
// Uses pcntl_sigtimedwait instead of sleep, so we can be sure we catch sighup
// signals from the OS. This may seem counterproductive, as sleep(3) will wake
// on *any* signal, but php does all sorts of crazy things to make this
// unreliable.
if ($secs < 5) {
$secs = 5;
}
pcntl_sigtimedwait(array(SIGHUP), $sig, $secs);
if ($sig['signo'] === SIGHUP) {
sigHupHandler(1);
}
}
/**
* Sig Timed Wait
*
* @param array $set Array of signals to wait for.
* @param array $sigInfo The siginfo is set to an array containing informations about the signal. See pcntl_sigwaitinfo().
* @param int $seconds Timeout in seconds.
* @param int $nanoseconds Timeout in nanoseconds.
*
* @return int On success, pcntl_sigtimedwait() returns a signal number.
*/
public function sigTimedWait(array $set, array $sigInfo, $seconds = 0, $nanoseconds = 0)
{
return pcntl_sigtimedwait($set, $sigInfo, $seconds, $nanoseconds);
}
/**
* Waits for signals, with a timeout
* @param int Seconds
* @param int Nanoseconds
* @return void
*/
protected function sigwait($sec = 0, $nano = 1)
{
$siginfo = NULL;
$signo = pcntl_sigtimedwait(self::$signalsno, $siginfo, $sec, $nano);
if (is_bool($signo)) {
return $signo;
}
if ($signo > 0) {
$this->sighandler($signo);
return TRUE;
}
return FALSE;
}
/**
* Wait some time for signal.
* If signal received, it will be correclty handled.
*/
public function wait()
{
$siginfo = [];
$signal = pcntl_sigtimedwait(array_keys($this->handlers), $siginfo, 0, pow(10, 9) * 0.01);
$this->handle($signal);
}
/**
* Waits for signals, with a timeout
* @param int Seconds
* @param int Nanoseconds
* @return boolean Success
*/
protected function sigwait($sec = 0, $nano = 300000000.0)
{
$siginfo = null;
if (!function_exists('pcntl_sigtimedwait')) {
$signo = $this->sigtimedwait(array_keys(static::$signals), $siginfo, $sec, $nano);
} else {
$signo = @\pcntl_sigtimedwait(array_keys(static::$signals), $siginfo, $sec, $nano);
}
if (is_bool($signo)) {
return $signo;
}
if ($signo > 0) {
$this->sighandler($signo);
return true;
}
return false;
}
posix_kill($child1, SIGHUP);
$firstChildIsFree = false;
$got2execution = true;
} elseif ($secondChildIsFree) {
posix_kill($child2, SIGHUP);
$secondChildIsFree = false;
$got2execution = true;
}
if ($got2execution) {
file_put_contents('db.txt', '');
} else {
echo "No free workers\n";
}
}
//Check signals from child processes
if (pcntl_sigtimedwait(array(SIGUSR1, SIGUSR2), $siginfo, 0, 1) != -1) {
if ($siginfo['signo'] == SIGUSR1) {
echo "Got signal from child1\n";
$firstChildIsFree = true;
} elseif ($siginfo['signo'] == SIGUSR2) {
echo "Got signal from child2\n";
$secondChildIsFree = true;
}
}
sleep(1);
}
} else {
pcntl_setpriority(5);
echo "Child2 waiting for SIGHUP\n";
while (true) {
pcntl_sigwaitinfo(array(SIGHUP));
echo "signo === SIGCHLD\n";
var_dump($siginfo['signo'] === SIGCHLD);
echo "signo === uid\n";
var_dump($siginfo['uid'] === posix_getuid());
echo "signo === pid\n";
var_dump($siginfo['pid'] === $pid);
pcntl_waitpid($pid, $status);
set_error_handler(function ($errno, $errstr) {
echo "Error triggered\n";
}, E_WARNING);
echo "sigprocmask with invalid arguments\n";
/* Valgrind expectedly complains about this:
* "sigprocmask: unknown 'how' field 2147483647"
* Skip */
if (getenv("USE_ZEND_ALLOC") !== '0') {
var_dump(pcntl_sigprocmask(PHP_INT_MAX, array(SIGTERM)));
} else {
echo "Error triggered\n";
echo "bool(false)\n";
}
var_dump(pcntl_sigprocmask(SIG_SETMASK, array(0)));
echo "sigwaitinfo with invalid arguments\n";
var_dump(pcntl_sigwaitinfo(array(0)));
echo "sigtimedwait with invalid arguments\n";
var_dump(pcntl_sigtimedwait(array(SIGTERM), $signo, PHP_INT_MAX, PHP_INT_MAX));
} else {
$siginfo = NULL;
pcntl_sigtimedwait(array(SIGINT), $siginfo, 3600, 0);
exit;
}
}
public function sigwait($millisec = 10)
{
$siginfo = array();
$sec = $millisec * 0.001 > 0 ? $millisec * 0.001 : 0;
$nanosec = $millisec * 1000000.0 < 1000000000.0 ? $millisec * 1000000.0 : 0;
$signo = pcntl_sigtimedwait(Thread::$signalsno, $siginfo, $sec, $nanosec);
if (is_bool($signo)) {
return $signo;
}
if ($signo > 0) {
$this->sighandler($signo);
return TRUE;
}
return FALSE;
}
/**
* Dispatcher responsible for the thread intercommunication and communication with their parent process.
* @param bool $useBlocking On true blocks the internal execution until communication data is available for the current dispatched thread otherwise it skips it.
* @return void
*/
public static function dispatch($useBlocking = false)
{
// {{{
$NULL = null;
// prevent any threads to run their own dispatchers
if (self::$instancesCreatedEverAArr === null || count(self::$instancesCreatedEverAArr) == 0) {
return;
}
// for checking SIGCHLD child signals informing that a particular "thread" was paused
$sigSet = array(SIGCHLD);
$sigInfo = array();
// begin the dispatching process
foreach (self::$instancesCreatedEverAArr as $instId => &$inst) {
// loop through ALL active instances of GPhpCriticalSection
foreach ($inst->mastersThreadSpecificData as $threadId => &$specificDataAArr) {
// loop though the threads per each instance in GPhpCriticalSection
// checking for child signals informing that a thread has exited or was paused
while (pcntl_sigtimedwait($sigSet, $sigInfo) == SIGCHLD) {
if ($sigInfo['code'] >= 0 && $sigInfo['code'] <= 3) {
// child has exited
self::$threadsForRemovalAArr[$sigInfo['pid']] = $sigInfo['pid'];
} else {
if ($sigInfo['code'] == 5) {
// stopped (paused) child
$specificDataAArr['dispatchPriority'] = 0;
// make the dispatch priority lowest
} else {
if ($sigInfo['code'] == 6) {
// resume stopped (paused) child
$specificDataAArr['dispatchPriority'] = 1;
// increase little bit the priority since we expect interaction with the critical section
}
}
}
}
$inst->intercomInterlocutorPid =& $specificDataAArr['intercomInterlocutorPid'];
if (isset(self::$threadsForRemovalAArr[$inst->intercomInterlocutorPid])) {
unset($inst->mastersThreadSpecificData[$threadId]);
continue;
}
$inst->intercomRead =& $specificDataAArr['intercomRead'];
$inst->intercomWrite =& $specificDataAArr['intercomWrite'];
$inst->dispatchPriority =& $specificDataAArr['dispatchPriority'];
if (!$useBlocking && !$inst->intercomRead->isReceivingDataAvailable()) {
$inst->dispatchPriority = 0;
if ($inst->isIntercomBroken()) {
unset($inst->mastersThreadSpecificData[$threadId]);
// remove the thread from the dispatching list as soon as we can
}
continue;
}
self::dataDispatch($inst, $threadId);
$mostPrioritizedThreadId = NULL;
if ($inst->dispatchPriority !== 2) {
foreach ($inst->mastersThreadSpecificData as $threadId2 => &$specificDataAArr2) {
if ($specificDataAArr2['dispatchPriority'] === 2) {
$mostPrioritizedThreadId = $threadId2;
}
}
} else {
$mostPrioritizedThreadId = $threadId;
}
if ($mostPrioritizedThreadId !== NULL && $mostPrioritizedThreadId !== $threadId) {
$inst->intercomInterlocutorPid =& $inst->mastersThreadSpecificData[$mostPrioritizedThreadId]['intercomInterlocutorPid'];
$inst->intercomRead =& $inst->mastersThreadSpecificData[$mostPrioritizedThreadId]['intercomRead'];
$inst->intercomWrite =& $inst->mastersThreadSpecificData[$mostPrioritizedThreadId]['intercomWrite'];
$inst->dispatchPriority =& $inst->mastersThreadSpecificData[$mostPrioritizedThreadId]['dispatchPriority'];
if (!$useBlocking && !$inst->intercomRead->isReceivingDataAvailable()) {
$inst->dispatchPriority = 0;
if ($inst->isIntercomBroken()) {
unset($inst->mastersThreadSpecificData[$mostPrioritizedThreadId]);
// remove the thread from the dispatching list as soon as we can
}
continue;
}
self::dataDispatch($inst, $threadId);
}
}
// rearrange the threads in the current critical section
// instance using their new dispatch priority number
// if a lock has already occurred that thread will have the
// highest priority
uksort($inst->mastersThreadSpecificData, function ($a, $b) use($inst) {
if ($inst->mastersThreadSpecificData[$a]['intercomInterlocutorPid'] == $inst->ownerPid) {
return -1;
}
if ($inst->mastersThreadSpecificData[$b]['intercomInterlocutorPid'] == $inst->ownerPid) {
return 1;
}
return $inst->mastersThreadSpecificData[$a]['dispatchPriority'] < $inst->mastersThreadSpecificData[$b]['dispatchPriority'];
});
$inst->intercomInterlocutorPid =& $NULL;
$inst->intercomRead =& $NULL;
$inst->intercomWrite =& $NULL;
$inst->dispatchPriority =& $NULL;
}
// make sure that no terminated threads are left in the internal thread
// dispatching list that all instances of GPhpThreadCriticalSection have
foreach (self::$instancesCreatedEverAArr as $instId => &$inst) {
foreach ($inst->mastersThreadSpecificData as $threadId => &$specificDataAArr) {
$inst->intercomInterlocutorPid =& $specificDataAArr['intercomInterlocutorPid'];
if (isset(self::$threadsForRemovalAArr[$inst->intercomInterlocutorPid])) {
unset($inst->mastersThreadSpecificData[$threadId]);
}
}
$inst->intercomInterlocutorPid =& $NULL;
}
self::$threadsForRemovalAArr = array();
// rearrange the active instances of GPhpThreadCriticalSection in the
// following priority order (the higher the number the bigger the priority):
// 2. the instance with the thread that has currently locked the critical section
// 1. instances with threads with the highest dispatch priority
// 0. instances with the most threads inside
$instCrtdEver =& self::$instancesCreatedEverAArr;
uksort($instCrtdEver, function ($a, $b) use($instCrtdEver) {
// the locker thread is with highest priority
if ($instCrtdEver[$a]->mastersThreadSpecificData['intercomInterlocutorPid'] == $instCrtdEver[$a]->ownerPid) {
return -1;
}
if ($instCrtdEver[$b]->mastersThreadSpecificData['intercomInterlocutorPid'] == $instCrtdEver[$b]->ownerPid) {
return 1;
}
// deal with the case of critical sections with no threads
if (!empty($instCrtdEver[$a]->mastersThreadSpecificData) && empty($instCrtdEver[$b]->mastersThreadSpecificData)) {
return -1;
} else {
if (empty($instCrtdEver[$a]->mastersThreadSpecificData) && !empty($instCrtdEver[$b]->mastersThreadSpecificData)) {
return 1;
} else {
if (empty($instCrtdEver[$b]->mastersThreadSpecificData) && empty($instCrtdEver[$b]->mastersThreadSpecificData)) {
return 0;
}
}
}
// a
// gather the thread dispatch priorities for the compared critical sections
$dispPriorTableA = array();
// priority value => occurrences count
$dispPriorTableB = array();
// priority value => occurrences count
foreach ($instCrtdEver[$a]->mastersThreadSpecificData as $thrdSpecificData) {
@($dispPriorTableA[$thrdSpecificData['dispatchPriority']] += 1);
}
foreach ($instCrtdEver[$b]->mastersThreadSpecificData as $thrdSpecificData) {
@($dispPriorTableB[$thrdSpecificData['dispatchPriority']] += 1);
}
// both critical sections have threads
// make the tables to have the same amount of keys (rows)
foreach ($dispPriorTableA as $key => $value) {
@($dispPriorTableB[$key] = $dispPriorTableB[$key]);
}
// this is done on purpose
foreach ($dispPriorTableB as $key => $value) {
@($dispPriorTableA[$key] = $dispPriorTableA[$key]);
}
ksort($dispPriorTableA);
ksort($dispPriorTableB);
// compare the tables while taking into account the priority
// and the thread count that have it per critical section
foreach ($dispPriorTableA as $key => $value) {
if ($value < $dispPriorTableB[$key]) {
return 1;
} else {
if ($value > $dispPriorTableB[$key]) {
return -1;
}
}
// a
}
return 0;
// a
});
}
<?php
pcntl_signal(SIGALRM, function () {
});
var_dump(pcntl_alarm());
pcntl_alarm(0);
var_dump(pcntl_alarm(60));
var_dump(pcntl_alarm(1) > 0);
$siginfo = array();
var_dump(pcntl_sigtimedwait(array(SIGALRM), $siginfo, 2) === SIGALRM);
/**
* 主进程主循环 主要是监听子进程退出、服务终止、平滑重启信号
* @return void
*/
public static function loop()
{
$siginfo = array();
while (1) {
@pcntl_sigtimedwait(array(SIGCHLD), $siginfo, 1);
// 初始化任务系统
Lib\Task::tick();
// 检查是否有进程退出
self::checkWorkerExit();
// 触发信号处理
pcntl_signal_dispatch();
}
}
/**
* Kill all children with the supplied signal and wait for them to exit
*
* @param int $signal
* @return bool
*/
protected function killChildren($signal = SIGKILL)
{
// Signal all processes to exit
foreach ($this->processPIDs as $pid => $name) {
\posix_kill($pid, $signal);
}
for ($i = 0; $i < 3000; $i++) {
if (\count($this->processPIDs) === 0) {
return true;
}
$signalInfo = null;
if (-1 !== \pcntl_sigtimedwait([SIGCHLD], $signalInfo, 0, 100000000)) {
$this->cleanupChild($signalInfo, true);
}
}
// Forcefully destroy all remaining processes
foreach ($this->processPIDs as $pid => $name) {
\posix_kill($pid, SIGKILL);
}
return false;
}
