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php_raphf_api.h
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/* +--------------------------------------------------------------------+ | PECL :: raphf | +--------------------------------------------------------------------+ | Redistribution and use in source and binary forms, with or without | | modification, are permitted provided that the conditions mentioned | | in the accompanying LICENSE file are met. | +--------------------------------------------------------------------+ | Copyright (c) 2013, Michael Wallner <mike@php.net> | +--------------------------------------------------------------------+ */ #ifndef PHP_RAPHF_API_H #define PHP_RAPHF_API_H #include "php_raphf.h" /** * A resource constructor. * * @param opaque is the \a data from php_persistent_handle_provide() * @param init_arg is the \a init_arg from php_resource_factory_init() * @return the created (persistent) handle */ typedef void *(*php_resource_factory_handle_ctor_t)(void *opaque, void *init_arg); /** * The copy constructor of a resource. * * @param opaque the factory's data * @param handle the (persistent) handle to copy */ typedef void *(*php_resource_factory_handle_copy_t)(void *opaque, void *handle); /** * The destructor of a resource. * * @param opaque the factory's data * @param handle the handle to destroy */ typedef void (*php_resource_factory_handle_dtor_t)(void *opaque, void *handle); /** * The resource ops consisting of a ctor, a copy ctor and a dtor. * * Define this ops and register them with php_persistent_handle_provide() * in MINIT. */ typedef struct php_resource_factory_ops { /** The resource constructor */ php_resource_factory_handle_ctor_t ctor; /** The resource's copy constructor */ php_resource_factory_handle_copy_t copy; /** The resource's destructor */ php_resource_factory_handle_dtor_t dtor; } php_resource_factory_ops_t; /** * The resource factory. */ typedef struct php_resource_factory { /** The resource ops */ php_resource_factory_ops_t fops; /** Opaque user data */ void *data; /** User data destructor */ void (*dtor)(void *data); /** How often this factory is referenced */ unsigned refcount; } php_resource_factory_t; /** * Initialize a resource factory. * * If you register a \a dtor for a resource factory used with a persistent * handle provider, be sure to call php_persistent_handle_cleanup() for your * registered provider in MSHUTDOWN, else the dtor will point to no longer * available memory if the extension has already been unloaded. * * @param f the factory to initialize; if NULL allocated on the heap * @param fops the resource ops to assign to the factory * @param data opaque user data; may be NULL * @param dtor a destructor for the data; may be NULL * @return \a f or an allocated resource factory */ PHP_RAPHF_API php_resource_factory_t *php_resource_factory_init( php_resource_factory_t *f, php_resource_factory_ops_t *fops, void *data, void (*dtor)(void *data)); /** * Increase the refcount of the resource factory. * * @param rf the resource factory * @return the new refcount */ PHP_RAPHF_API unsigned php_resource_factory_addref(php_resource_factory_t *rf); /** * Destroy the resource factory. * * If the factory's refcount reaches 0, the \a dtor for \a data is called. * * @param f the resource factory */ PHP_RAPHF_API void php_resource_factory_dtor(php_resource_factory_t *f); /** * Destroy and free the resource factory. * * Calls php_resource_factory_dtor() and frees \a f if the factory's refcount * reached 0. * * @param f the resource factory */ PHP_RAPHF_API void php_resource_factory_free(php_resource_factory_t **f); /** * Construct a resource by the resource factory \a f * * @param f the resource factory * @param init_arg for the resource constructor * @return the new resource */ PHP_RAPHF_API void *php_resource_factory_handle_ctor(php_resource_factory_t *f, void *init_arg); /** * Create a copy of the resource \a handle * * @param f the resource factory * @param handle the resource to copy * @return the copy */ PHP_RAPHF_API void *php_resource_factory_handle_copy(php_resource_factory_t *f, void *handle); /** * Destroy (and free) the resource * * @param f the resource factory * @param handle the resource to destroy */ PHP_RAPHF_API void php_resource_factory_handle_dtor(php_resource_factory_t *f, void *handle); /** * Persistent handles storage */ typedef struct php_persistent_handle_list { /** Storage of free resources */ HashTable free; /** Count of acquired resources */ unsigned long used; } php_persistent_handle_list_t; /** * Definition of a persistent handle provider. * Holds a resource factory an a persistent handle list. */ typedef struct php_persistent_handle_provider { /** * The list of free handles. * Hash of "ident" => array(handles) entries. Persistent handles are * acquired out of this list. */ php_persistent_handle_list_t list; /** * The resource factory. * New handles are created by this factory. */ php_resource_factory_t rf; } php_persistent_handle_provider_t; typedef struct php_persistent_handle_factory php_persistent_handle_factory_t; /** * Wakeup the persistent handle on re-acquisition. */ typedef void (*php_persistent_handle_wakeup_t)( php_persistent_handle_factory_t *f, void **handle); /** * Retire the persistent handle on release. */ typedef void (*php_persistent_handle_retire_t)( php_persistent_handle_factory_t *f, void **handle); /** * Definition of a persistent handle factory. * * php_persistent_handle_concede() will return a pointer to a * php_persistent_handle_factory if a provider for the \a name has * been registered with php_persistent_handle_provide(). */ struct php_persistent_handle_factory { /** The persistent handle provider */ php_persistent_handle_provider_t *provider; /** The persistent handle wakeup routine; may be NULL */ php_persistent_handle_wakeup_t wakeup; /** The persistent handle retire routine; may be NULL */ php_persistent_handle_retire_t retire; /** The ident for which this factory manages resources */ zend_string *ident; /** Whether it has to be free'd on php_persistent_handle_abandon() */ unsigned free_on_abandon:1; }; /** * Register a persistent handle provider in MINIT. * * Registers a factory provider for \a name_str with \a fops resource factory * ops. Call this in your MINIT. * * A php_resource_factory will be created with \a fops, \a data and \a dtor * and will be stored together with a php_persistent_handle_list in the global * raphf hash. * * A php_persistent_handle_factory can then be retrieved by * php_persistent_handle_concede() at runtime. * * @param name the provider name, e.g. "http\Client\Curl" * @param fops the resource factory ops * @param data opaque user data * @param dtor \a data destructor * @return SUCCESS/FAILURE */ PHP_RAPHF_API ZEND_RESULT_CODE php_persistent_handle_provide( zend_string *name, php_resource_factory_ops_t *fops, void *data, void (*dtor)(void *)); /** * Retrieve a persistent handle factory at runtime. * * If a persistent handle provider has been registered for \a name, a new * php_persistent_handle_factory creating resources in the \a ident * namespace will be constructed. * * The wakeup routine \a wakeup and the retire routine \a retire will be * assigned to the new php_persistent_handle_factory. * * @param a pointer to a factory; allocated on the heap if NULL * @param name the provider name, e.g. "http\Client\Curl" * @param ident the subsidiary namespace, e.g. "php.net:80" * @param wakeup any persistent handle wakeup routine * @param retire any persistent handle retire routine * @return \a a or an allocated persistent handle factory */ PHP_RAPHF_API php_persistent_handle_factory_t *php_persistent_handle_concede( php_persistent_handle_factory_t *a, zend_string *name, zend_string *ident, php_persistent_handle_wakeup_t wakeup, php_persistent_handle_retire_t retire); /** * Abandon the persistent handle factory. * * Destroy a php_persistent_handle_factory created by * php_persistent_handle_concede(). If the memory for the factory was allocated, * it will automatically be free'd. * * @param a the persistent handle factory to destroy */ PHP_RAPHF_API void php_persistent_handle_abandon( php_persistent_handle_factory_t *a); /** * Acquire a persistent handle. * * That is, either re-use a resource from the free list or create a new handle. * * If a handle is acquired from the free list, the * php_persistent_handle_factory::wakeup callback will be executed for that * handle. * * @param a the persistent handle factory * @param init_arg the \a init_arg for php_resource_factory_handle_ctor() * @return the acquired resource */ PHP_RAPHF_API void *php_persistent_handle_acquire( php_persistent_handle_factory_t *a, void *init_arg); /** * Release a persistent handle. * * That is, either put it back into the free list for later re-use or clean it * up with php_resource_factory_handle_dtor(). * * If a handle is put back into the free list, the * php_persistent_handle_factory::retire callback will be executed for that * handle. * * @param a the persistent handle factory * @param handle the handle to release */ PHP_RAPHF_API void php_persistent_handle_release( php_persistent_handle_factory_t *a, void *handle); /** * Copy a persistent handle. * * Let the underlying resource factory copy the \a handle. * * @param a the persistent handle factory * @param handle the resource to accrete */ PHP_RAPHF_API void *php_persistent_handle_accrete( php_persistent_handle_factory_t *a, void *handle); /** * Retrieve persistent handle resource factory ops. * * These ops can be used to mask a persistent handle factory as * resource factory itself, so you can transparently use the * resource factory API, both for persistent and non-persistent * ressources. * * Example: * \code{.c} * php_resource_factory_t *create_my_rf(zend_string *persistent_id) * { * php_resource_factory_t *rf; * * if (persistent_id) { * php_persistent_handle_factory_t *pf; * php_resource_factory_ops_t *ops; * zend_string *ns = zend_string_init("my", 2, 1); * * ops = php_persistent_handle_get_resource_factory_ops(); * pf = php_persistent_handle_concede(NULL, ns, persistent_id, NULL, NULL); * rf = php_persistent_handle_resource_factory_init(NULL, pf); * zend_string_release(ns); * } else { * rf = php_resource_factory_init(NULL, &myops, NULL, NULL); * } * return rf; * } * \endcode */ PHP_RAPHF_API php_resource_factory_ops_t * php_persistent_handle_get_resource_factory_ops(void); /** * Create a resource factory for persistent handles. * * This will create a resource factory with persistent handle ops, which wraps * the provided reource factory \a pf. * * @param a the persistent handle resource factory to initialize * @param pf the resource factory to wrap */ PHP_RAPHF_API php_resource_factory_t * php_persistent_handle_resource_factory_init(php_resource_factory_t *a, php_persistent_handle_factory_t *pf); /** * Check whether a resource factory is a persistent handle resource factory. * * @param a the resource factory to check */ PHP_RAPHF_API zend_bool php_resource_factory_is_persistent( php_resource_factory_t *a); /** * Clean persistent handles up. * * Destroy persistent handles of provider \a name and in subsidiary * namespace \a ident. * * If \a name is NULL, all persistent handles of all providers with a * matching \a ident will be cleaned up. * * If \a identr is NULL all persistent handles of the provider will be * cleaned up. * * Ergo, if both, \a name and \a ident are NULL, then all * persistent handles will be cleaned up. * * You must call this in MSHUTDOWN, if your resource factory ops hold a * registered php_resource_factory::dtor, else the dtor will point to * memory not any more available if the extension has already been unloaded. * * @param name the provider name; may be NULL * @param ident the subsidiary namespace name; may be NULL */ PHP_RAPHF_API void php_persistent_handle_cleanup(zend_string *name, zend_string *ident); /** * Retrieve statistics about the current process/thread's persistent handles. * * @return a HashTable like: * \code * [ * "name" => [ * "ident" => [ * "used" => 1, * "free" => 0, * ] * ] * ] * \endcode */ PHP_RAPHF_API HashTable *php_persistent_handle_statall(HashTable *ht); #endif /* PHP_RAPHF_API_H */ /* * Local variables: * tab-width: 4 * c-basic-offset: 4 * End: * vim600: noet sw=4 ts=4 fdm=marker * vim<600: noet sw=4 ts=4 */