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/* wmem_user_cb.h
* Definitions for the Wireshark Memory Manager User Callbacks
* Copyright 2012, Evan Huus <eapache@gmail.com>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#ifndef __WMEM_USER_CB_H__
#define __WMEM_USER_CB_H__
#include <glib.h>
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
/** @addtogroup wmem
* @{
* @defgroup wmem-user-cb User Callbacks
*
* User callbacks.
*
* @{
*/
/** The events that can trigger a callback. */
typedef enum _wmem_cb_event_t {
WMEM_CB_FREE_EVENT, /**< wmem_free_all() */
WMEM_CB_DESTROY_EVENT /**< wmem_destroy_allocator() */
} wmem_cb_event_t;
/** Function signature for registered user callbacks.
*
* allocator The allocator that triggered this callback.
* event The event type that triggered this callback.
* user_data Whatever user_data was originally passed to the call to
* wmem_register_callback().
* @return FALSE to unregister the callback, TRUE otherwise.
*/
typedef gboolean (*wmem_user_cb_t) (wmem_allocator_t*, wmem_cb_event_t, void*);
/** Register a callback function with the given allocator pool.
*
* @param allocator The allocator with which to register the callback.
* @param callback The function to be called as the callback.
* @param user_data An arbitrary data pointer that is passed to the callback as
* a way to specify extra parameters or store extra data. Note
* that this pointer is not freed when a callback is finished,
* you have to do that yourself in the callback, or just
* allocate it in the appropriate wmem pool.
* @return ID of this callback that can be passed back to
* wmem_unregister_callback().
*/
WS_DLL_PUBLIC
guint
wmem_register_callback(wmem_allocator_t *allocator, wmem_user_cb_t callback,
void *user_data);
/** Unregister the callback function with the given ID.
*
* @param allocator The allocator from which to unregister the callback.
* @param id The callback id as returned from wmem_register_callback().
*/
WS_DLL_PUBLIC
void
wmem_unregister_callback(wmem_allocator_t *allocator, guint id);
/** @}
* @} */
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __WMEM_USER_CB_H__ */
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 4
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* vi: set shiftwidth=4 tabstop=8 expandtab:
* :indentSize=4:tabSize=8:noTabs=true:
*/
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