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- #ifndef foooperationhfoo
- #define foooperationhfoo
- /***
- This file is part of PulseAudio.
- Copyright 2004-2006 Lennart Poettering
- PulseAudio is free software; you can redistribute it and/or modify
- it under the terms of the GNU Lesser General Public License as published
- by the Free Software Foundation; either version 2.1 of the License,
- or (at your option) any later version.
- PulseAudio is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
- You should have received a copy of the GNU Lesser General Public License
- along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
- ***/
- #include <pulse/cdecl.h>
- #include <pulse/def.h>
- #include <pulse/version.h>
- /** \file
- * Asynchronous operations */
- PA_C_DECL_BEGIN
- /** An asynchronous operation object */
- typedef struct pa_operation pa_operation;
- /** A callback for operation state changes */
- typedef void (*pa_operation_notify_cb_t) (pa_operation *o, void *userdata);
- /** Increase the reference count by one */
- pa_operation *pa_operation_ref(pa_operation *o);
- /** Decrease the reference count by one */
- void pa_operation_unref(pa_operation *o);
- /** Cancel the operation. Beware! This will not necessarily cancel the
- * execution of the operation on the server side. However it will make
- * sure that the callback associated with this operation will not be
- * called anymore, effectively disabling the operation from the client
- * side's view. */
- void pa_operation_cancel(pa_operation *o);
- /** Return the current status of the operation */
- pa_operation_state_t pa_operation_get_state(pa_operation *o);
- /** Set the callback function that is called when the operation state
- * changes. Usually this is not necessary, since the functions that
- * create pa_operation objects already take a callback that is called
- * when the operation finishes. Registering a state change callback is
- * mainly useful, if you want to get called back also if the operation
- * gets cancelled. \since 4.0 */
- void pa_operation_set_state_callback(pa_operation *o, pa_operation_notify_cb_t cb, void *userdata);
- PA_C_DECL_END
- #endif
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