From 045c1d602dcba57868845ba3270510593c39480f Mon Sep 17 00:00:00 2001 From: Lennart Poettering Date: Thu, 15 May 2008 23:34:41 +0000 Subject: merge glitch-free branch back into trunk git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@2445 fefdeb5f-60dc-0310-8127-8f9354f1896f --- src/pulsecore/shmasyncq.h | 62 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 62 insertions(+) create mode 100644 src/pulsecore/shmasyncq.h (limited to 'src/pulsecore/shmasyncq.h') diff --git a/src/pulsecore/shmasyncq.h b/src/pulsecore/shmasyncq.h new file mode 100644 index 00000000..ca35ffd2 --- /dev/null +++ b/src/pulsecore/shmasyncq.h @@ -0,0 +1,62 @@ +#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 + +#include +#include + +/* 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 -- cgit