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132 lines
3.2 KiB
C
132 lines
3.2 KiB
C
/***
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This file is part of PulseAudio.
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Copyright 2004-2006 Lennart Poettering
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PulseAudio is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published
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by the Free Software Foundation; either version 2.1 of the License,
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or (at your option) any later version.
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PulseAudio is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with PulseAudio; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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USA.
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***/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <pulse/xmalloc.h>
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#include <pulsecore/macro.h>
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#include <pulsecore/flist.h>
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#include "internal.h"
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#include "operation.h"
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PA_STATIC_FLIST_DECLARE(operations, 0, pa_xfree);
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pa_operation *pa_operation_new(pa_context *c, pa_stream *s, pa_operation_cb_t cb, void *userdata) {
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pa_operation *o;
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pa_assert(c);
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if (!(o = pa_flist_pop(PA_STATIC_FLIST_GET(operations))))
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o = pa_xnew(pa_operation, 1);
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PA_REFCNT_INIT(o);
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o->context = c;
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o->stream = s;
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o->private = NULL;
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o->state = PA_OPERATION_RUNNING;
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o->callback = cb;
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o->userdata = userdata;
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/* Refcounting is strictly one-way: from the "bigger" to the "smaller" object. */
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PA_LLIST_PREPEND(pa_operation, c->operations, o);
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pa_operation_ref(o);
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return o;
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}
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pa_operation *pa_operation_ref(pa_operation *o) {
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pa_assert(o);
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pa_assert(PA_REFCNT_VALUE(o) >= 1);
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PA_REFCNT_INC(o);
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return o;
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}
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void pa_operation_unref(pa_operation *o) {
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pa_assert(o);
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pa_assert(PA_REFCNT_VALUE(o) >= 1);
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if (PA_REFCNT_DEC(o) <= 0) {
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pa_assert(!o->context);
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pa_assert(!o->stream);
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if (pa_flist_push(PA_STATIC_FLIST_GET(operations), o) < 0)
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pa_xfree(o);
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}
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}
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static void operation_unlink(pa_operation *o) {
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pa_assert(o);
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if (o->context) {
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pa_assert(PA_REFCNT_VALUE(o) >= 2);
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PA_LLIST_REMOVE(pa_operation, o->context->operations, o);
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pa_operation_unref(o);
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o->context = NULL;
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}
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o->stream = NULL;
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o->callback = NULL;
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o->userdata = NULL;
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}
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static void operation_set_state(pa_operation *o, pa_operation_state_t st) {
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pa_assert(o);
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pa_assert(PA_REFCNT_VALUE(o) >= 1);
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if (st == o->state)
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return;
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pa_operation_ref(o);
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o->state = st;
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if ((o->state == PA_OPERATION_DONE) || (o->state == PA_OPERATION_CANCELED))
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operation_unlink(o);
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pa_operation_unref(o);
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}
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void pa_operation_cancel(pa_operation *o) {
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pa_assert(o);
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pa_assert(PA_REFCNT_VALUE(o) >= 1);
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operation_set_state(o, PA_OPERATION_CANCELED);
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}
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void pa_operation_done(pa_operation *o) {
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pa_assert(o);
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pa_assert(PA_REFCNT_VALUE(o) >= 1);
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operation_set_state(o, PA_OPERATION_DONE);
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}
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pa_operation_state_t pa_operation_get_state(pa_operation *o) {
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pa_assert(o);
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pa_assert(PA_REFCNT_VALUE(o) >= 1);
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return o->state;
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}
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