Merge HUGE set of changes temporarily into a branch, to allow me to move them from one machine to another (lock-free and stuff)

git-svn-id: file:///home/lennart/svn/public/pulseaudio/branches/lennart@1469 fefdeb5f-60dc-0310-8127-8f9354f1896f

src/pulse/internal.h

@@ -116,6 +116,7 @@ struct pa_stream {
     uint32_t requested_bytes;
 
     pa_memchunk peek_memchunk;
+    void *peek_data;
     pa_memblockq *record_memblockq;
 
     int corked;

src/pulse/stream.c

@@ -91,6 +91,7 @@ pa_stream *pa_stream_new(pa_context *c, const char *name, const pa_sample_spec *
     s->peek_memchunk.index = 0;
     s->peek_memchunk.length = 0;
     s->peek_memchunk.memblock = NULL;
+    s->peek_data = NULL;
 
     s->record_memblockq = NULL;
 
@@ -125,8 +126,11 @@ static void stream_free(pa_stream *s) {
         s->mainloop->time_free(s->auto_timing_update_event);
     }
 
-    if (s->peek_memchunk.memblock)
+    if (s->peek_memchunk.memblock) {
+        if (s->peek_data)
+            pa_memblock_release(s->peek_memchunk.memblock);
         pa_memblock_unref(s->peek_memchunk.memblock);
+    }
 
     if (s->record_memblockq)
         pa_memblockq_free(s->record_memblockq);
@@ -608,8 +612,11 @@ int pa_stream_write(
     if (free_cb)
         chunk.memblock = pa_memblock_new_user(s->context->mempool, (void*) data, length, free_cb, 1);
     else {
+        void *tdata;
         chunk.memblock = pa_memblock_new(s->context->mempool, length);
-        memcpy(chunk.memblock->data, data, length);
+        tdata = pa_memblock_acquire(chunk.memblock);
+        memcpy(tdata, data, length);
+        pa_memblock_release(chunk.memblock);
     }
 
     chunk.index = 0;
@@ -675,9 +682,12 @@ int pa_stream_peek(pa_stream *s, const void **data, size_t *length) {
             *length = 0;
             return 0;
         }
+
+        s->peek_data = pa_memblock_acquire(s->peek_memchunk.memblock);
     }
 
-    *data = (const char*) s->peek_memchunk.memblock->data + s->peek_memchunk.index;
+    assert(s->peek_data);
+    *data = (uint8_t*) s->peek_data + s->peek_memchunk.index;
     *length = s->peek_memchunk.length;
     return 0;
 }
@@ -696,6 +706,8 @@ int pa_stream_drop(pa_stream *s) {
     if (s->timing_info_valid && !s->timing_info.read_index_corrupt)
         s->timing_info.read_index += s->peek_memchunk.length;
 
+    assert(s->peek_data);
+    pa_memblock_release(s->peek_memchunk.memblock);
     pa_memblock_unref(s->peek_memchunk.memblock);
     s->peek_memchunk.length = 0;
     s->peek_memchunk.index = 0;

src/pulse/xmalloc.h

@@ -75,6 +75,15 @@ static inline void* pa_xnew0_internal(unsigned n, size_t k) {
 /** Same as pa_xnew() but set the memory to zero */
 #define pa_xnew0(type, n) ((type*) pa_xnew0_internal((n), sizeof(type)))
 
+/** Internal helper for pa_xnew0() */
+static inline void* pa_xnewdup_internal(const void *p, unsigned n, size_t k) {
+    assert(n < INT_MAX/k);
+    return pa_xmemdup(p, n*k);
+}
+
+/** Same as pa_xnew() but set the memory to zero */
+#define pa_xnewdup(type, p, n) ((type*) pa_xnewdup_internal((p), (n), sizeof(type)))
+
 PA_C_DECL_END
 
 #endif