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rework memory block management to be thread-safe and mostly lock-free.

Browse source 
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
This commit is contained in:
Lennart Poettering 2006-09-26 23:50:56 +00:00
parent 5ad143b3ab
commit d210ebbb09
36 changed files with 991 additions and 500 deletions
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3
src/pulsecore/sample-util.h
View file

@ -36,10 +36,11 @@ typedef struct pa_mix_info {
pa_memchunk chunk;
pa_cvolume volume;
void *userdata;
void *internal; /* Used internally by pa_mix(), should not be initialised when calling pa_mix() */
} pa_mix_info;
size_t pa_mix(
const pa_mix_info channels[],
pa_mix_info channels[],
unsigned nchannels,
void *data,
size_t length,