mirror of
https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git
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7bae1baa3e
git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@2526 fefdeb5f-60dc-0310-8127-8f9354f1896f
114 lines
2.7 KiB
C
114 lines
2.7 KiB
C
/* $Id$ */
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/***
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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
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published by the Free Software Foundation; either version 2.1 of the
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License, 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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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License 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 <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <pulse/xmalloc.h>
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#include <pulsecore/macro.h>
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#include <pulsecore/core-util.h>
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#include "memchunk.h"
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pa_memchunk* pa_memchunk_make_writable(pa_memchunk *c, size_t min) {
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pa_memblock *n;
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size_t l;
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void *tdata, *sdata;
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pa_assert(c);
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pa_assert(c->memblock);
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if (pa_memblock_ref_is_one(c->memblock) &&
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!pa_memblock_is_read_only(c->memblock) &&
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pa_memblock_get_length(c->memblock) >= c->index+min)
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return c;
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l = PA_MAX(c->length, min);
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n = pa_memblock_new(pa_memblock_get_pool(c->memblock), l);
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sdata = pa_memblock_acquire(c->memblock);
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tdata = pa_memblock_acquire(n);
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memcpy(tdata, (uint8_t*) sdata + c->index, c->length);
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pa_memblock_release(c->memblock);
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pa_memblock_release(n);
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pa_memblock_unref(c->memblock);
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c->memblock = n;
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c->index = 0;
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return c;
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}
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pa_memchunk* pa_memchunk_reset(pa_memchunk *c) {
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pa_assert(c);
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memset(c, 0, sizeof(*c));
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return c;
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}
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pa_memchunk *pa_memchunk_will_need(const pa_memchunk *c) {
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void *p;
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pa_assert(c);
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pa_assert(c->memblock);
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/* A version of pa_memblock_will_need() that works on memchunks
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* instead of memblocks */
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p = (uint8_t*) pa_memblock_acquire(c->memblock) + c->index;
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pa_will_need(p, c->length);
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pa_memblock_release(c->memblock);
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return (pa_memchunk*) c;
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}
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pa_memchunk* pa_memchunk_memcpy(pa_memchunk *dst, pa_memchunk *src) {
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void *p, *q;
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pa_assert(dst);
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pa_assert(src);
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pa_assert(dst->length == src->length);
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p = pa_memblock_acquire(dst->memblock);
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q = pa_memblock_acquire(src->memblock);
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memmove((uint8_t*) p + dst->index,
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(uint8_t*) q + src->index,
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dst->length);
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pa_memblock_release(dst->memblock);
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pa_memblock_release(src->memblock);
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return dst;
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}
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