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#ifndef foopulseshmasyncqhfoo
#define foopulseshmasyncqhfoo
/* $Id$ */
/***
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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with PulseAudio; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#include <sys/types.h>
#include <pulse/def.h>
#include <pulsecore/macro.h>
/* Similar to pa_asyncq, but stores data in a shared memory segment */
struct pa_shmasyncq_data {
unsigned n_elements;
size_t element_size;
unsigned read_idx;
unsigned write_idx;
pa_fdsem_data read_fdsem_data, write_fdsem_data;
};
#define PA_SHMASYNCQ_DEFAULT_N_ELEMENTS 128
#define PA_SHMASYNCQ_SIZE(n_elements, element_size) (PA_ALIGN(sizeof(pa_shmasyncq_data)) + (((n_elements) * (PA_ALIGN(sizeof(pa_atomic_t)) + PA_ALIGN(element_size)))))
#define PA_SHMASYNCQ_DEFAULT_SIZE(element_size) PA_SHMASYNCQ_SIZE(PA_SHMASYNCQ_DEFAULT_N_ELEMENTS, element_size)
typedef struct pa_shmasyncq pa_shmasyncq;
pa_shmasyncq *pa_shmasyncq_new(unsigned n_elements, size_t element_size, void *data, int fd[2]);
void pa_shmasyncq_free(pa_shmasyncq* q, pa_free_cb_t free_cb);
void* pa_shmasyncq_pop_begin(pa_shmasyncq *q, pa_bool_t wait);
void pa_shmasyncq_pop_commit(pa_shmasyncq *q);
int* pa_shmasyncq_push_begin(pa_shmasyncq *q, pa_bool_t wait);
void pa_shmasyncq_push_commit(pa_shmasyncq *q);
int pa_shmasyncq_get_fd(pa_shmasyncq *q);
int pa_shmasyncq_before_poll(pa_shmasyncq *a);
void pa_shmasyncq_after_poll(pa_shmasyncq *a);
#endif
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