Revision 582db59d
Added by Assos Assos almost 9 years ago
| drupal7/includes/module.inc | ||
|---|---|---|
| 676 | 676 |
/** |
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* Determines which modules are implementing a hook. |
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* |
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* @param $hook |
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* Lazy-loaded include files specified with "group" via hook_hook_info() or |
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* hook_module_implements_alter() will be automatically included by this |
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* function when necessary. |
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* |
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* @param string $hook |
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* The name of the hook (e.g. "help" or "menu"). |
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* @param $sort |
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* @param bool $sort
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* By default, modules are ordered by weight and filename, settings this option |
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* to TRUE, module list will be ordered by module name. |
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* @param $reset |
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* @param bool $reset
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* For internal use only: Whether to force the stored list of hook |
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* implementations to be regenerated (such as after enabling a new module, |
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* before processing hook_enable). |
| ... | ... | |
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static $drupal_static_fast; |
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if (!isset($drupal_static_fast)) {
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$drupal_static_fast['implementations'] = &drupal_static(__FUNCTION__); |
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$drupal_static_fast['verified'] = &drupal_static(__FUNCTION__ . ':verified'); |
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} |
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$implementations = &$drupal_static_fast['implementations']; |
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$verified = &$drupal_static_fast['verified']; |
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// We maintain a persistent cache of hook implementations in addition to the |
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// static cache to avoid looping through every module and every hook on each |
| ... | ... | |
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// per request. |
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if ($reset) {
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$implementations = array(); |
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$verified = array(); |
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cache_set('module_implements', array(), 'cache_bootstrap');
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drupal_static_reset('module_hook_info');
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drupal_static_reset('drupal_alter');
|
| ... | ... | |
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} |
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|
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// Fetch implementations from cache. |
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// This happens on the first call to module_implements(*, *, FALSE) during a |
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// request, but also when $implementations have been reset, e.g. after |
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// module_enable(). |
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if (empty($implementations)) {
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$implementations = cache_get('module_implements', 'cache_bootstrap');
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if ($implementations === FALSE) {
|
| ... | ... | |
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else {
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$implementations = $implementations->data; |
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} |
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// Forget all previously "verified" hooks, in case that $implementations |
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// were cleared via drupal_static_reset('module_implements') instead of
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// module_implements(*, *, TRUE). |
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$verified = array(); |
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} |
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|
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if (!isset($implementations[$hook])) {
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// The hook is not cached, so ensure that whether or not it has |
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// implementations, that the cache is updated at the end of the request. |
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$implementations['#write_cache'] = TRUE; |
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// Discover implementations for this hook. |
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$hook_info = module_hook_info(); |
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$implementations[$hook] = array(); |
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$list = module_list(FALSE, FALSE, $sort); |
| ... | ... | |
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$implementations[$hook][$module] = $include_file ? $hook_info[$hook]['group'] : FALSE; |
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} |
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} |
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// Allow modules to change the weight of specific implementations but avoid |
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// Allow modules to change the weight of specific implementations, but avoid
|
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// an infinite loop. |
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if ($hook != 'module_implements_alter') {
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// Remember the implementations before hook_module_implements_alter(). |
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$implementations_before = $implementations[$hook]; |
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drupal_alter('module_implements', $implementations[$hook], $hook);
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// Verify implementations that were added or modified. |
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foreach (array_diff_assoc($implementations[$hook], $implementations_before) as $module => $group) {
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// If drupal_alter('module_implements') changed or added a $group, the
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// respective file needs to be included. |
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if ($group) {
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module_load_include('inc', $module, "$module.$group");
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} |
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// If a new implementation was added, verify that the function exists. |
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if (!function_exists($module . '_' . $hook)) {
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unset($implementations[$hook][$module]); |
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} |
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} |
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} |
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// Implementations for this hook are now "verified". |
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$verified[$hook] = TRUE; |
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} |
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else {
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elseif (!isset($verified[$hook])) {
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// Implementations for this hook were in the cache, but they are not |
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// "verified" yet. |
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foreach ($implementations[$hook] as $module => $group) {
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// If this hook implementation is stored in a lazy-loaded file, so include |
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// that file first. |
| ... | ... | |
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$implementations['#write_cache'] = TRUE; |
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} |
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} |
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$verified[$hook] = TRUE; |
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} |
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return array_keys($implementations[$hook]); |
| ... | ... | |
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* @see module_implements() |
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*/ |
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function module_implements_write_cache() {
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// The list of implementations includes vital modules only before full |
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// bootstrap, so do not write cache if we are not fully bootstrapped yet. |
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if (drupal_get_bootstrap_phase() != DRUPAL_BOOTSTRAP_FULL) {
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return; |
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} |
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$implementations = &drupal_static('module_implements');
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if (isset($implementations['#write_cache'])) {
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unset($implementations['#write_cache']); |
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