006b8fa3f0
Make valgrind find more buffer misuses. Buffer contents are not persistent, they get invalidated by pcm_buffer_get(), because this function may allocate a new buffer, but will not copy old data.
54 lines
1.4 KiB
C
54 lines
1.4 KiB
C
/*
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* Copyright (C) 2003-2011 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include "pcm_buffer.h"
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#include "poison.h"
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/**
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* Align the specified size to the next 8k boundary.
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*/
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G_GNUC_CONST
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static size_t
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align_8k(size_t size)
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{
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return ((size - 1) | 0x1fff) + 1;
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}
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void *
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pcm_buffer_get(struct pcm_buffer *buffer, size_t size)
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{
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assert(buffer != NULL);
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if (buffer->size < size) {
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/* free the old buffer */
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g_free(buffer->buffer);
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buffer->size = align_8k(size);
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buffer->buffer = g_malloc(buffer->size);
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} else {
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/* discard old buffer contents */
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poison_undefined(buffer->buffer, buffer->size);
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}
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assert(buffer->size >= size);
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return buffer->buffer;
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}
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