Add ini settings for fork support to PHP extension.

src/php/ext/grpc/php_grpc.c

@@ -67,27 +67,22 @@ ZEND_GET_MODULE(grpc)
 
 /* {{{ PHP_INI
  */
-/* Remove comments and fill if you need to have entries in php.ini
    PHP_INI_BEGIN()
-   STD_PHP_INI_ENTRY("grpc.global_value", "42", PHP_INI_ALL, OnUpdateLong,
-                     global_value, zend_grpc_globals, grpc_globals)
-   STD_PHP_INI_ENTRY("grpc.global_string", "foobar", PHP_INI_ALL,
-                     OnUpdateString, global_string, zend_grpc_globals,
-                     grpc_globals)
+   STD_PHP_INI_ENTRY("grpc.enable_fork_support", "0", PHP_INI_SYSTEM, OnUpdateBool,
+                     enable_fork_support, zend_grpc_globals, grpc_globals)
+   STD_PHP_INI_ENTRY("grpc.poll_strategy", NULL, PHP_INI_SYSTEM, OnUpdateString,
+                     poll_strategy, zend_grpc_globals, grpc_globals)
    PHP_INI_END()
-*/
 /* }}} */
 
 /* {{{ php_grpc_init_globals
  */
-/* Uncomment this function if you have INI entries
-   static void php_grpc_init_globals(zend_grpc_globals *grpc_globals)
-   {
-     grpc_globals->global_value = 0;
-     grpc_globals->global_string = NULL;
-   }
-*/
+static void php_grpc_init_globals(zend_grpc_globals *grpc_globals) {
+  grpc_globals->enable_fork_support = 0;
+  grpc_globals->poll_strategy = NULL;
+}
 /* }}} */
+
 void create_new_channel(
     wrapped_grpc_channel *channel,
     char *target,
@@ -208,12 +203,22 @@ void register_fork_handlers() {
   }
 }
 
+void apply_ini_settings() {
+  if (GRPC_G(enable_fork_support)) {
+    setenv("GRPC_ENABLE_FORK_SUPPORT", "1", 1 /* overwrite? */);
+  }
+
+  if (GRPC_G(poll_strategy)) {
+    setenv("GRPC_POLL_STRATEGY", GRPC_G(poll_strategy), 1 /* overwrite? */);
+  }
+}
+
 /* {{{ PHP_MINIT_FUNCTION
  */
 PHP_MINIT_FUNCTION(grpc) {
-  /* If you have INI entries, uncomment these lines
-     REGISTER_INI_ENTRIES();
-  */
+  ZEND_INIT_MODULE_GLOBALS(grpc, php_grpc_init_globals, NULL);
+  REGISTER_INI_ENTRIES();
+
   /* Register call error constants */
   REGISTER_LONG_CONSTANT("Grpc\\CALL_OK", GRPC_CALL_OK,
                          CONST_CS | CONST_PERSISTENT);
@@ -349,9 +354,7 @@ PHP_MINIT_FUNCTION(grpc) {
 /* {{{ PHP_MSHUTDOWN_FUNCTION
  */
 PHP_MSHUTDOWN_FUNCTION(grpc) {
-  /* uncomment this line if you have INI entries
-     UNREGISTER_INI_ENTRIES();
-  */
+  UNREGISTER_INI_ENTRIES();
   // WARNING: This function IS being called by PHP when the extension
   // is unloaded but the logs were somehow suppressed.
   if (GRPC_G(initialized)) {
@@ -375,9 +378,7 @@ PHP_MINFO_FUNCTION(grpc) {
   php_info_print_table_row(2, "grpc support", "enabled");
   php_info_print_table_row(2, "grpc module version", PHP_GRPC_VERSION);
   php_info_print_table_end();
-  /* Remove comments if you have entries in php.ini
-     DISPLAY_INI_ENTRIES();
-  */
+  DISPLAY_INI_ENTRIES();
 }
 /* }}} */
 
@@ -385,6 +386,7 @@ PHP_MINFO_FUNCTION(grpc) {
  */
 PHP_RINIT_FUNCTION(grpc) {
   if (!GRPC_G(initialized)) {
+    apply_ini_settings();
     grpc_init();
     register_fork_handlers();
     grpc_php_init_completion_queue(TSRMLS_C);

src/php/ext/grpc/php_grpc.h

@@ -66,6 +66,8 @@ PHP_RINIT_FUNCTION(grpc);
 */
 ZEND_BEGIN_MODULE_GLOBALS(grpc)
   zend_bool initialized;
+  zend_bool enable_fork_support;
+  char *poll_strategy;
 ZEND_END_MODULE_GLOBALS(grpc)
 
 /* In every utility function you add that needs to use variables

src/php/ext/grpc/tests/grpc-default-ini.phpt

@@ -0,0 +1,15 @@
+--TEST--
+Ensure default ini settings
+--SKIPIF--
+<?php if (!extension_loaded("grpc")) print "skip"; ?>
+--FILE--
+<?php
+if (ini_get('grpc.enable_fork_support')) {
+    die('grpc.enable_fork_support not off by default');
+}
+if (ini_get('grpc.poll_strategy') !== "") {
+    die('grpc.poll_strategy not empty by default');
+}
+echo 'ok';
+--EXPECT--
+ok

src/php/ext/grpc/tests/grpc-set-ini.phpt

@@ -0,0 +1,24 @@
+--TEST--
+Ensure ini settings are handled
+--SKIPIF--
+<?php if (!extension_loaded("grpc")) print "skip"; ?>
+--INI--
+grpc.enable_fork_support = 1
+grpc.poll_strategy = epoll1
+--FILE--
+<?php
+if (!ini_get('grpc.enable_fork_support')) {
+    die('grpc.enable_fork_support not set');
+}
+if (!getenv('GRPC_ENABLE_FORK_SUPPORT')) {
+    die('env GRPC_ENABLE_FORK_SUPPORT not set');
+}
+if (ini_get('grpc.poll_strategy') !== 'epoll1') {
+    die('grpc.poll_strategy !== epoll1');
+}
+if (getenv('GRPC_POLL_STRATEGY') !== 'epoll1') {
+    die('env GRPC_POLL_STRATEGY not epoll1');
+}
+echo 'ok';
+--EXPECT--
+ok