From d210ebbb09daddb2c8c8e8e77243e088b0b19c4d Mon Sep 17 00:00:00 2001 From: Lennart Poettering Date: Tue, 26 Sep 2006 23:50:56 +0000 Subject: 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 --- src/pulsecore/protocol-native.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) (limited to 'src/pulsecore/protocol-native.c') diff --git a/src/pulsecore/protocol-native.c b/src/pulsecore/protocol-native.c index 38c024b7..fba611d7 100644 --- a/src/pulsecore/protocol-native.c +++ b/src/pulsecore/protocol-native.c @@ -2274,6 +2274,7 @@ static void pstream_memblock_callback(pa_pstream *p, uint32_t channel, int64_t o } else { struct upload_stream *u = (struct upload_stream*) stream; size_t l; + assert(u->type == UPLOAD_STREAM); if (!u->memchunk.memblock) { @@ -2293,9 +2294,18 @@ static void pstream_memblock_callback(pa_pstream *p, uint32_t channel, int64_t o if (l > chunk->length) l = chunk->length; + if (l > 0) { - memcpy((uint8_t*) u->memchunk.memblock->data + u->memchunk.index + u->memchunk.length, - (uint8_t*) chunk->memblock->data+chunk->index, l); + void *src, *dst; + dst = pa_memblock_acquire(u->memchunk.memblock); + src = pa_memblock_acquire(chunk->memblock); + + memcpy((uint8_t*) dst + u->memchunk.index + u->memchunk.length, + (uint8_t*) src+chunk->index, l); + + pa_memblock_release(u->memchunk.memblock); + pa_memblock_release(chunk->memblock); + u->memchunk.length += l; u->length -= l; } -- cgit