feat: add function num_available_processors

Signed-off-by: Daniel Kesselberg <[email protected]>

Author: kesselb

ext/standard/basic_functions.c

@@ -2578,3 +2578,23 @@ PHP_FUNCTION(sys_getloadavg)
 }
 /* }}} */
 #endif
+
+PHP_FUNCTION(num_available_processors)
+{
+	ZEND_PARSE_PARAMETERS_NONE();
+
+#if defined(_SC_NPROCESSORS_ONLN)
+	int nprocs = sysconf(_SC_NPROCESSORS_ONLN);
+	if (nprocs > 0) {
+		RETURN_LONG(nprocs);
+	}
+#elif defined _WIN32 && ! defined __CYGWIN__
+	SYSTEM_INFO system_info;
+	GetSystemInfo (&system_info);
+	if (system_info.dwNumberOfProcessors > 0) {
+		RETURN_LONG(system_info.dwNumberOfProcessors);
+	}
+#endif
+
+	RETURN_NULL();
+}

ext/standard/basic_functions.stub.php

@@ -3834,3 +3834,5 @@ function sapi_windows_set_ctrl_handler(?callable $handler, bool $add = true): bo
 
 function sapi_windows_generate_ctrl_event(int $event, int $pid = 0): bool {}
 #endif
+
+function num_available_processors(): ?int {}

ext/standard/basic_functions_arginfo.h

@@ -0,0 +1,16 @@
+--TEST--
+num_available_processors() tests
+--SKIPIF--
+<?php
+if (!function_exists("num_available_processors")) die("skip");
+?>
+--FILE--
+<?php
+
+var_dump(num_available_processors());
+
+echo "Done\n";
+?>
+--EXPECTF--
+int(%d)
+Done