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1 | <?php |
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2 | namespace PHPDaemon\Thread; |
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3 | |||
4 | use PHPDaemon\Core\EventLoop; |
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5 | use PHPDaemon\Exceptions\ClearStack; |
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6 | |||
7 | /** |
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8 | * Thread |
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9 | * |
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10 | * @package Core |
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11 | * |
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12 | * @author Vasily Zorin <[email protected]> |
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13 | */ |
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14 | abstract class Generic |
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15 | { |
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16 | use \PHPDaemon\Traits\ClassWatchdog; |
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17 | use \PHPDaemon\Traits\StaticObjectWatchdog; |
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18 | |||
19 | /** |
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20 | * Hash of known signal [no => name, ...] |
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21 | * @var array |
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22 | */ |
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23 | public static $signals = [ |
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24 | SIGHUP => 'SIGHUP', |
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25 | SIGSYS => 'SIGSYS', |
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26 | SIGPIPE => 'SIGPIPE', |
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27 | SIGALRM => 'SIGALRM', |
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28 | SIGTERM => 'SIGTERM', |
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29 | SIGSTOP => 'SIGSTOP', |
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30 | SIGINT => 'SIGINT', |
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31 | SIGCHLD => 'SIGCHLD', |
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32 | SIGTTIN => 'SIGTTIN', |
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33 | SIGTTOU => 'SIGTTOU', |
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34 | SIGIO => 'SIGIO', |
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35 | SIGXCPU => 'SIGXCPU', |
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36 | SIGXFSZ => 'SIGXFSZ', |
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37 | SIGVTALRM => 'SIGVTALRM', |
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38 | SIGPROF => 'SIGPROF', |
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39 | SIGWINCH => 'SIGWINCH', |
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40 | SIGUSR1 => 'SIGUSR1', |
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41 | SIGUSR2 => 'SIGUSR2', |
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42 | SIGTSTP => 'SIGTSTP', |
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43 | ]; |
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44 | /** |
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45 | * Process identificator |
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46 | * @var int |
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47 | */ |
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48 | public $id; |
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49 | /** |
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50 | * PID |
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51 | * @var int |
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52 | */ |
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53 | protected $pid; |
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54 | /** |
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55 | * Is this thread shutdown? |
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56 | * @var boolean |
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57 | */ |
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58 | protected $shutdown = false; |
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59 | /** |
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60 | * Is this thread terminated? |
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61 | * @var boolean |
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62 | */ |
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63 | protected $terminated = false; |
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64 | /** |
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65 | * Collections of childrens |
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66 | * @var array|Collection[] |
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67 | */ |
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68 | protected $collections = []; |
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69 | /** |
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70 | * Storage of signal handler events |
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71 | * @var array |
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72 | */ |
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73 | protected $sigEvents = []; |
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74 | /** |
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75 | * If true, we do not register signals automatically at start |
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76 | * @var boolean |
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77 | */ |
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78 | protected $delayedSigReg = false; |
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79 | |||
80 | /** |
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81 | * Checks if given process ID does exist |
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82 | * @static |
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83 | * @param integer PID |
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84 | * @param integer $pid |
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85 | * @return boolean Success |
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86 | */ |
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87 | public static function ifExistsByPid($pid) |
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88 | { |
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89 | return \posix_kill($pid, 0); |
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90 | } |
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91 | |||
92 | /** |
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93 | * Get PID of this Thread |
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94 | * @return integer |
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95 | */ |
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96 | public function getPid() |
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97 | { |
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98 | return $this->pid; |
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99 | } |
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100 | |||
101 | /** |
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102 | * Get ID of this Thread |
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103 | * @return integer |
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104 | */ |
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105 | public function getId() |
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106 | { |
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107 | return $this->id; |
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108 | } |
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109 | |||
110 | /** |
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111 | * Set ID of this Thread |
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112 | * @param integer Id |
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113 | * @return void |
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114 | */ |
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115 | public function setId($id) |
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116 | { |
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117 | $this->id = $id; |
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118 | } |
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119 | |||
120 | /** |
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121 | * Is this thread terminated? |
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122 | * @return boolean |
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123 | */ |
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124 | public function isTerminated() |
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125 | { |
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126 | return $this->terminated; |
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127 | } |
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128 | |||
129 | public function setTerminated() |
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130 | { |
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131 | $this->terminated = true; |
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132 | $this->onTerminated(); |
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133 | } |
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134 | |||
135 | protected function onTerminated() |
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136 | { |
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137 | } |
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138 | |||
139 | /** |
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140 | * Invoke magic method |
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141 | * @return void |
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142 | */ |
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143 | |||
144 | public function __invoke() |
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145 | { |
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146 | $this->run(); |
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147 | $this->shutdown(); |
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148 | } |
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149 | |||
150 | /** |
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151 | * Run thread process |
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152 | * @return void |
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153 | */ |
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154 | protected function run() |
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155 | { |
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156 | } |
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157 | |||
158 | /** |
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159 | * Shutdowns the current process properly |
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160 | * @return void |
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161 | */ |
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162 | protected function shutdown() |
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163 | { |
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164 | \posix_kill(\posix_getppid(), SIGCHLD); |
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165 | exit(0); |
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166 | } |
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167 | |||
168 | /** |
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169 | * Called when a signal caught through libevent. |
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170 | * @param integer Signal's number. |
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171 | * @param integer Events. |
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172 | * @param mixed Argument. |
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173 | * @return void |
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174 | */ |
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175 | public function eventSighandler($fd, $arg) |
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176 | { |
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177 | $this->sighandler($arg[0]); |
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178 | } |
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179 | |||
180 | /** |
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181 | * Called when the signal is caught |
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182 | * @param integer Signal's number |
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183 | * @return void |
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184 | */ |
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185 | public function sighandler($signo) |
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186 | { |
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187 | if (!isset(self::$signals[$signo])) { |
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188 | $this->log('caught unknown signal #' . $signo); |
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0 ignored issues
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189 | return; |
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190 | } |
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191 | if (method_exists($this, $m = strtolower(self::$signals[$signo]))) { |
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192 | $this->$m(); |
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193 | } elseif (method_exists($this, 'sigunknown')) { |
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194 | $this->sigunknown($signo); |
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0 ignored issues
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The method
sigunknown does not exist on object<PHPDaemon\Thread\Generic> ? Since you implemented __call , maybe consider adding a @method annotation.
If you implement This is often the case, when class ParentClass {
private $data = array();
public function __call($method, array $args) {
if (0 === strpos($method, 'get')) {
return $this->data[strtolower(substr($method, 3))];
}
throw new \LogicException(sprintf('Unsupported method: %s', $method));
}
}
/**
* If this class knows which fields exist, you can specify the methods here:
*
* @method string getName()
*/
class SomeClass extends ParentClass { }
![]() |
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195 | } |
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196 | } |
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197 | |||
198 | /** |
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199 | * Starts the process |
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200 | * @return void |
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201 | */ |
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202 | public function start($clearstack = true) |
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203 | { |
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204 | $pid = \pcntl_fork(); |
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205 | |||
206 | if ($pid === -1) { |
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207 | throw new \Exception('Could not fork'); |
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208 | } elseif ($pid === 0) { // we are the child |
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209 | $thread = $this; |
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210 | $thread->pid = \posix_getpid(); |
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211 | if (!$thread->delayedSigReg) { |
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212 | $thread->registerSignals(); |
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213 | } |
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214 | if ($clearstack) { |
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215 | throw new ClearStack('', 0, $thread); |
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216 | } else { |
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217 | $thread->run(); |
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218 | $thread->shutdown(); |
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219 | } |
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220 | } else { // we are the master |
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221 | $this->pid = $pid; |
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222 | } |
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223 | } |
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224 | |||
225 | /** |
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226 | * Registers signals |
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227 | * @return void |
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228 | */ |
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229 | protected function registerSignals() |
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230 | { |
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231 | foreach (self::$signals as $no => $name) { |
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232 | if (($name === 'SIGKILL') || ($name == 'SIGSTOP')) { |
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233 | continue; |
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234 | } |
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235 | |||
236 | if (!\pcntl_signal($no, [$this, 'sighandler'], true)) { |
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237 | $this->log('Cannot assign ' . $name . ' signal'); |
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0 ignored issues
–
show
The method
log does not exist on object<PHPDaemon\Thread\Generic> ? Since you implemented __call , maybe consider adding a @method annotation.
If you implement This is often the case, when class ParentClass {
private $data = array();
public function __call($method, array $args) {
if (0 === strpos($method, 'get')) {
return $this->data[strtolower(substr($method, 3))];
}
throw new \LogicException(sprintf('Unsupported method: %s', $method));
}
}
/**
* If this class knows which fields exist, you can specify the methods here:
*
* @method string getName()
*/
class SomeClass extends ParentClass { }
![]() |
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238 | } |
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239 | } |
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240 | } |
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241 | |||
242 | /** |
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243 | * Delays the process execution for the given number of seconds |
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244 | * @param integer Sleep time in seconds |
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245 | * @return boolean Success |
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246 | */ |
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247 | public function sleep($s) |
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248 | { |
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249 | static $interval = 0.2; |
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250 | $n = $s / $interval; |
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251 | |||
252 | for ($i = 0; $i < $n; ++$i) { |
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253 | if ($this->shutdown) { |
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254 | return false; |
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255 | } |
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256 | |||
257 | \usleep($interval * 1000000); |
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258 | } |
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259 | |||
260 | return true; |
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261 | } |
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262 | |||
263 | /** |
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264 | * Terminates the process |
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265 | * @param boolean Kill? |
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266 | * @return void |
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267 | */ |
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268 | public function stop($kill = false) |
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269 | { |
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270 | $this->shutdown = true; |
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271 | \posix_kill($this->pid, $kill ? SIGKILL : SIGTERM); |
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272 | } |
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273 | |||
274 | /** |
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275 | * Sends arbitrary signal to the process |
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276 | * @param integer Signal's number |
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277 | * @return boolean Success |
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278 | */ |
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279 | public function signal($sig) |
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280 | { |
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281 | return \posix_kill($this->pid, $sig); |
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282 | } |
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283 | |||
284 | /** |
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285 | * Checks if this process does exist |
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286 | * @return boolean Success |
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287 | */ |
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288 | public function ifExists() |
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289 | { |
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290 | return \posix_kill($this->pid, 0); |
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291 | } |
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292 | |||
293 | /** |
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294 | * Register signals. |
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295 | * @return void |
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296 | */ |
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297 | protected function registerEventSignals() |
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298 | { |
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299 | if (!EventLoop::$instance) { |
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300 | return; |
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301 | } |
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302 | foreach (self::$signals as $no => $name) { |
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303 | if ($name === 'SIGKILL' || $name == 'SIGSTOP') { |
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304 | continue; |
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305 | } |
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306 | |||
307 | $ev = EventLoop::$instance->signal($no, [$this, 'eventSighandler'], [$no]); |
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308 | if (!$ev) { |
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309 | $this->log('Cannot event_set for ' . $name . ' signal'); |
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0 ignored issues
–
show
The method
log does not exist on object<PHPDaemon\Thread\Generic> ? Since you implemented __call , maybe consider adding a @method annotation.
If you implement This is often the case, when class ParentClass {
private $data = array();
public function __call($method, array $args) {
if (0 === strpos($method, 'get')) {
return $this->data[strtolower(substr($method, 3))];
}
throw new \LogicException(sprintf('Unsupported method: %s', $method));
}
}
/**
* If this class knows which fields exist, you can specify the methods here:
*
* @method string getName()
*/
class SomeClass extends ParentClass { }
![]() |
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310 | } |
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311 | $ev->add(); |
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312 | $this->sigEvents[$no] = $ev; |
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313 | } |
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314 | } |
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315 | |||
316 | /** |
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317 | * Unregister signals. |
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318 | * @return void |
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319 | */ |
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320 | protected function unregisterSignals() |
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321 | { |
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322 | foreach ($this->sigEvents as $no => $ev) { |
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323 | $ev->free(); |
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324 | unset($this->sigEvents[$no]); |
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325 | } |
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326 | } |
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327 | |||
328 | /** |
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329 | * Sends the signal to parent process |
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330 | * @param integer Signal's number |
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331 | * @return boolean Success |
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332 | */ |
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333 | protected function backsig($sig) |
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334 | { |
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335 | return \posix_kill(\posix_getppid(), $sig); |
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336 | } |
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337 | |||
338 | /** |
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339 | * Called when the signal SIGCHLD caught |
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340 | * @return void |
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341 | */ |
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342 | protected function sigchld() |
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343 | { |
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344 | $this->waitPid(); |
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345 | } |
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346 | |||
347 | /** |
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348 | * Checks for SIGCHLD |
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349 | * @return boolean Success |
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350 | */ |
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351 | protected function waitPid() |
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352 | { |
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353 | start: |
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354 | $pid = \pcntl_waitpid(-1, $status, WNOHANG); |
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355 | if ($pid > 0) { |
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356 | foreach ($this->collections as $col) { |
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357 | foreach ($col->threads as $k => $t) { |
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358 | if ($t->pid === $pid) { |
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359 | $t->setTerminated(); |
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360 | unset($col->threads[$k]); |
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361 | goto start; |
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362 | } |
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363 | } |
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364 | } |
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365 | } |
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366 | |||
367 | return false; |
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368 | } |
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369 | |||
370 | /** |
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371 | * Called when the signal SIGTERM caught |
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372 | * @return void |
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373 | */ |
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374 | protected function sigterm() |
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375 | { |
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376 | exit(0); |
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377 | } |
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378 | |||
379 | /** |
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380 | * Called when the signal SIGINT caught |
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381 | * @return void |
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382 | */ |
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383 | protected function sigint() |
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384 | { |
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385 | exit(0); |
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386 | } |
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387 | |||
388 | /** |
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389 | * Called when the signal SIGTERM caught |
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390 | * @return void |
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391 | */ |
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392 | protected function sigquit() |
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393 | { |
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394 | $this->shutdown = true; |
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395 | } |
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396 | |||
397 | /** |
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398 | * Called when the signal SIGKILL caught |
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399 | * @return void |
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400 | */ |
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401 | protected function sigkill() |
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402 | { |
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403 | exit(0); |
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404 | } |
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405 | |||
406 | /** |
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407 | * Wait until all processes are terminated |
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408 | * @return void |
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409 | */ |
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410 | protected function waitAll() |
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411 | { |
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412 | do { |
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413 | $n = 0; |
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414 | |||
415 | foreach ($this->collections as &$col) { |
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416 | $n += $col->removeTerminated(); |
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417 | } |
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418 | if (!$this->waitPid()) { |
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419 | $this->sigwait(0, 20000); |
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420 | } |
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421 | } while ($n > 0); |
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422 | } |
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423 | |||
424 | /** |
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425 | * Waits for signals, with a timeout |
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426 | * @param int Seconds |
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427 | * @param int Nanoseconds |
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428 | * @return boolean Success |
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429 | */ |
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430 | protected function sigwait($sec = 0, $nano = 0.3e9) |
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431 | { |
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432 | $siginfo = null; |
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433 | |||
434 | if (!function_exists('pcntl_sigtimedwait')) { |
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435 | $signo = $this->sigtimedwait(array_keys(static::$signals), $siginfo, $sec, $nano); |
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436 | } else { |
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437 | $signo = @\pcntl_sigtimedwait(array_keys(static::$signals), $siginfo, $sec, $nano); |
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438 | } |
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439 | |||
440 | if (is_bool($signo)) { |
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441 | return $signo; |
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442 | } |
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443 | |||
444 | if ($signo > 0) { |
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445 | $this->sighandler($signo); |
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446 | |||
447 | return true; |
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448 | } |
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449 | |||
450 | return false; |
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451 | } |
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452 | |||
453 | /** |
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454 | * Implementation of pcntl_sigtimedwait for Mac. |
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455 | * |
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456 | * @param array Signal |
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457 | * @param null|array SigInfo |
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458 | * @param int Seconds |
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459 | * @param int Nanoseconds |
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460 | * @param integer $sec |
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461 | * @param double $nano |
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462 | * @return boolean Success |
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463 | */ |
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464 | protected function sigtimedwait($signals, $siginfo, $sec, $nano) |
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0 ignored issues
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465 | { |
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466 | \pcntl_signal_dispatch(); |
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467 | if (\time_nanosleep($sec, $nano) === true) { |
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468 | return false; |
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469 | } |
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470 | \pcntl_signal_dispatch(); |
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471 | return true; |
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472 | } |
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473 | |||
474 | /** |
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475 | * Sets a title of the current process |
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476 | * |
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477 | * @param string $title |
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478 | * @return boolean Success |
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479 | */ |
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480 | protected function setTitle($title) |
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481 | { |
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482 | return cli_set_process_title($title); |
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483 | } |
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484 | |||
485 | /** |
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486 | * Returns a title of the current process |
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487 | * |
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488 | * @return string |
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489 | */ |
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490 | protected function getTitle() |
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491 | { |
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492 | return cli_get_process_title(); |
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493 | } |
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494 | } |
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495 |
If you implement
__call
and you know which methods are available, you can improve IDE auto-completion and static analysis by adding a @method annotation to the class.This is often the case, when
__call
is implemented by a parent class and only the child class knows which methods exist: