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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 */
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