diff options
author | Lennart Poettering <lennart@poettering.net> | 2006-09-26 23:50:56 +0000 |
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committer | Lennart Poettering <lennart@poettering.net> | 2006-09-26 23:50:56 +0000 |
commit | d210ebbb09daddb2c8c8e8e77243e088b0b19c4d (patch) | |
tree | 6ca5cc7add195f5a59778df4b0ff44f2881a0c12 /src/modules/module-pipe-sink.c | |
parent | 5ad143b3aba3e5bd0d528feb3143dd9cd2f1e845 (diff) |
rework memory block management to be thread-safe and mostly lock-free.
pa_memblock is now an opaque structure. Access to its fields is now done
through various accessor functions in a thread-safe manner.
pa_memblock_acquire() and pa_memblock_release() are now used to access the
attached audio data. Why? To allow safe manipulation of the memory pointer
maintained by the memory block. Internally _acquire() and _release() maintain a
reference counter. Please do not confuse this reference counter whith the one
maintained by pa_memblock_ref()/_unref()!
As a side effect this patch removes all direct usages of AO_t and replaces it
with pa_atomic_xxx based code.
This stuff needs some serious testing love. Especially if threads are actively
used.
git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@1404 fefdeb5f-60dc-0310-8127-8f9354f1896f
Diffstat (limited to 'src/modules/module-pipe-sink.c')
-rw-r--r-- | src/modules/module-pipe-sink.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/src/modules/module-pipe-sink.c b/src/modules/module-pipe-sink.c index 4aee849b..59d91aa4 100644 --- a/src/modules/module-pipe-sink.c +++ b/src/modules/module-pipe-sink.c @@ -84,6 +84,8 @@ static const char* const valid_modargs[] = { static void do_write(struct userdata *u) { ssize_t r; + void *p; + assert(u); u->core->mainloop->defer_enable(u->defer_event, 0); @@ -97,12 +99,17 @@ static void do_write(struct userdata *u) { if (pa_sink_render(u->sink, PIPE_BUF, &u->memchunk) < 0) return; - assert(u->memchunk.memblock && u->memchunk.length); + assert(u->memchunk.memblock); + assert(u->memchunk.length); + + p = pa_memblock_acquire(u->memchunk.memblock); - if ((r = pa_iochannel_write(u->io, (uint8_t*) u->memchunk.memblock->data + u->memchunk.index, u->memchunk.length)) < 0) { + if ((r = pa_iochannel_write(u->io, (uint8_t*) p + u->memchunk.index, u->memchunk.length)) < 0) { + pa_memblock_release(u->memchunk.memblock); pa_log("write(): %s", pa_cstrerror(errno)); return; } + pa_memblock_release(u->memchunk.memblock); u->memchunk.index += r; u->memchunk.length -= r; |