2 This file is part of PulseAudio.
4 Copyright 2004-2006 Lennart Poettering
6 PulseAudio is free software; you can redistribute it and/or modify
7 it under the terms of the GNU Lesser General Public License as
8 published by the Free Software Foundation; either version 2.1 of the
9 License, or (at your option) any later version.
11 PulseAudio is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with PulseAudio; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
31 #include <pulsecore/macro.h>
32 #include <pulsecore/core-util.h>
36 pa_memchunk
* pa_memchunk_make_writable(pa_memchunk
*c
, size_t min
) {
42 pa_assert(c
->memblock
);
44 if (pa_memblock_ref_is_one(c
->memblock
) &&
45 !pa_memblock_is_read_only(c
->memblock
) &&
46 pa_memblock_get_length(c
->memblock
) >= c
->index
+min
)
49 l
= PA_MAX(c
->length
, min
);
51 n
= pa_memblock_new(pa_memblock_get_pool(c
->memblock
), l
);
53 sdata
= pa_memblock_acquire(c
->memblock
);
54 tdata
= pa_memblock_acquire(n
);
56 memcpy(tdata
, (uint8_t*) sdata
+ c
->index
, c
->length
);
58 pa_memblock_release(c
->memblock
);
59 pa_memblock_release(n
);
61 pa_memblock_unref(c
->memblock
);
69 pa_memchunk
* pa_memchunk_reset(pa_memchunk
*c
) {
72 memset(c
, 0, sizeof(*c
));
77 pa_memchunk
*pa_memchunk_will_need(const pa_memchunk
*c
) {
81 pa_assert(c
->memblock
);
83 /* A version of pa_memblock_will_need() that works on memchunks
84 * instead of memblocks */
86 p
= (uint8_t*) pa_memblock_acquire(c
->memblock
) + c
->index
;
87 pa_will_need(p
, c
->length
);
88 pa_memblock_release(c
->memblock
);
90 return (pa_memchunk
*) c
;
93 pa_memchunk
* pa_memchunk_memcpy(pa_memchunk
*dst
, pa_memchunk
*src
) {
98 pa_assert(dst
->length
== src
->length
);
100 p
= pa_memblock_acquire(dst
->memblock
);
101 q
= pa_memblock_acquire(src
->memblock
);
103 memmove((uint8_t*) p
+ dst
->index
,
104 (uint8_t*) q
+ src
->index
,
107 pa_memblock_release(dst
->memblock
);
108 pa_memblock_release(src
->memblock
);
113 pa_bool_t
pa_memchunk_isset(pa_memchunk
*chunk
) {