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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
Download patch file Download diff file Expand all files Collapse all files

20
src/pulsecore/cli-command.c
View file

@ -259,20 +259,20 @@ static int pa_cli_command_stat(pa_core *c, pa_tokenizer *t, pa_strbuf *buf, PA_G
stat = pa_mempool_get_stat(c->mempool);
pa_strbuf_printf(buf, "Memory blocks currently allocated: %u, size: %s.\n",
(unsigned) AO_load_acquire_read((AO_t*) &stat->n_allocated),
pa_bytes_snprint(s, sizeof(s), (size_t) AO_load_acquire_read((AO_t*) &stat->allocated_size)));
(unsigned) pa_atomic_load(&stat->n_allocated),
pa_bytes_snprint(s, sizeof(s), (size_t) pa_atomic_load(&stat->allocated_size)));
pa_strbuf_printf(buf, "Memory blocks allocated during the whole lifetime: %u, size: %s.\n",
(unsigned) AO_load_acquire_read((AO_t*) &stat->n_accumulated),
pa_bytes_snprint(s, sizeof(s), (size_t) AO_load_acquire_read((AO_t*) &stat->accumulated_size)));
(unsigned) pa_atomic_load(&stat->n_accumulated),
pa_bytes_snprint(s, sizeof(s), (size_t) pa_atomic_load(&stat->accumulated_size)));
pa_strbuf_printf(buf, "Memory blocks imported from other processes: %u, size: %s.\n",
(unsigned) AO_load_acquire_read((AO_t*) &stat->n_imported),
pa_bytes_snprint(s, sizeof(s), (size_t) AO_load_acquire_read((AO_t*) &stat->imported_size)));
(unsigned) pa_atomic_load(&stat->n_imported),
pa_bytes_snprint(s, sizeof(s), (size_t) pa_atomic_load(&stat->imported_size)));
pa_strbuf_printf(buf, "Memory blocks exported to other processes: %u, size: %s.\n",
(unsigned) AO_load_acquire_read((AO_t*) &stat->n_exported),
pa_bytes_snprint(s, sizeof(s), (size_t) AO_load_acquire_read((AO_t*) &stat->exported_size)));
(unsigned) pa_atomic_load(&stat->n_exported),
pa_bytes_snprint(s, sizeof(s), (size_t) pa_atomic_load(&stat->exported_size)));
pa_strbuf_printf(buf, "Total sample cache size: %s.\n",
pa_bytes_snprint(s, sizeof(s), pa_scache_total_size(c)));
@ -289,8 +289,8 @@ static int pa_cli_command_stat(pa_core *c, pa_tokenizer *t, pa_strbuf *buf, PA_G
pa_strbuf_printf(buf,
"Memory blocks of type %s: %u allocated/%u accumulated.\n",
type_table[k],
(unsigned) AO_load_acquire_read(&stat->n_allocated_by_type[k]),
(unsigned) AO_load_acquire_read(&stat->n_accumulated_by_type[k]));
(unsigned) pa_atomic_load(&stat->n_allocated_by_type[k]),
(unsigned) pa_atomic_load(&stat->n_accumulated_by_type[k]));
return 0;
}