internals:engine

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internals:engine [2010/07/27 22:51]
cataphract added non-parsed block
internals:engine [2012/03/07 00:30]
cataphract [Extension Globals]
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 </​code>​ </​code>​
  
-Note: do not use ZEND_INIT_MODULE_GLOBALS/​ts_allocate_id. If used a shared extension, they will provoke an attempt to call the destructor after the module has been unloaded!+Note: do not use ZEND_INIT_MODULE_GLOBALS/​ts_allocate_id. If used a shared extension, they will provoke an attempt to call the destructor after the module has been unloaded! ​Also, for all that is holy, do NOT initialize globals on MINIT (EXTNAME_G(var_ptr) = NULL), that won't work correctly in ZTS as it won't initialize the value in all threads.
  
 - Now define the constructor and destructor functions: - Now define the constructor and destructor functions:
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 } }
 </​code>​ </​code>​
 +
 +The globals constructor and destructor are NOT execute per-request,​ they are part of the module startup/​shutdown. The globals can store data across requests. If you need to do per-request operations to the globals, use module-activate and module-deactivate callbacks.
  
 Note: ZEND_MODULE_GLOBALS_CTOR_D will declare a function as receiving a zend_extname_globals*,​ not void* and zend_module_entry is supposed to contain a function pointer type that receives void*. I think this violates the C standard (the declarations are incompatible),​ but should however by safe since the arguments have the same size. Note: ZEND_MODULE_GLOBALS_CTOR_D will declare a function as receiving a zend_extname_globals*,​ not void* and zend_module_entry is supposed to contain a function pointer type that receives void*. I think this violates the C standard (the declarations are incompatible),​ but should however by safe since the arguments have the same size.
internals/engine.txt · Last modified: 2017/09/22 13:28 (external edit)