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

1 files changed, 1 insertions, 1 deletions

diff --git a/src/pulsecore/play-memchunk.c b/src/pulsecore/play-memchunk.c
index cde6a9ee..b711c98c 100644
--- a/src/pulsecore/play-memchunk.c
+++ b/src/pulsecore/play-memchunk.c
@@ -55,7 +55,7 @@ static int sink_input_peek(pa_sink_input *i, pa_memchunk *chunk) {
     if (c->length <= 0)
         return -1;
     
-    assert(c->memblock && c->memblock->length);
+    assert(c->memblock);
     *chunk = *c;
     pa_memblock_ref(c->memblock);