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core: Add a second rw mempool

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To keep the data and the ringbuffer separate, let's add another
mempool just for the ringbuffer(s). That way, the client can open
the ringbuffer shm file in rw mode and keep the data in ro mode.

Signed-off-by: David Henningsson <david.henningsson@canonical.com>
This commit is contained in:
David Henningsson 2014-04-25 14:20:57 +02:00
parent 073128fbc8
commit b06e616525
2 changed files with 16 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

14
src/pulsecore/core.c
View file

@ -127,6 +127,11 @@ pa_core* pa_core_new(pa_mainloop_api *m, bool shared, size_t shm_size) {
c->mempool = pool; c->mempool = pool;
pa_silence_cache_init(&c->silence_cache); pa_silence_cache_init(&c->silence_cache);
if (shared && !(c->rw_mempool = pa_mempool_new(shared, shm_size)))
pa_log_warn("failed to allocate shared writable memory pool.");
if (c->rw_mempool)
pa_mempool_set_is_remote_writable(c->rw_mempool, true);
c->exit_event = NULL; c->exit_event = NULL;
c->exit_idle_time = -1; c->exit_idle_time = -1;
@ -208,6 +213,8 @@ static void core_free(pa_object *o) {
pa_assert(!c->default_sink); pa_assert(!c->default_sink);
pa_silence_cache_done(&c->silence_cache); pa_silence_cache_done(&c->silence_cache);
if (c->rw_mempool)
pa_mempool_free(c->rw_mempool);
pa_mempool_free(c->mempool); pa_mempool_free(c->mempool);
for (j = 0; j < PA_CORE_HOOK_MAX; j++) for (j = 0; j < PA_CORE_HOOK_MAX; j++)
@ -254,7 +261,6 @@ void pa_core_maybe_vacuum(pa_core *c) {
if (pa_idxset_isempty(c->sink_inputs) && pa_idxset_isempty(c->source_outputs)) { if (pa_idxset_isempty(c->sink_inputs) && pa_idxset_isempty(c->source_outputs)) {
pa_log_debug("Hmm, no streams around, trying to vacuum."); pa_log_debug("Hmm, no streams around, trying to vacuum.");
pa_mempool_vacuum(c->mempool);
} else { } else {
pa_sink *si; pa_sink *si;
pa_source *so; pa_source *so;
@ -271,8 +277,12 @@ void pa_core_maybe_vacuum(pa_core *c) {
return; return;
pa_log_info("All sinks and sources are suspended, vacuuming memory"); pa_log_info("All sinks and sources are suspended, vacuuming memory");
pa_mempool_vacuum(c->mempool);
} }
pa_mempool_vacuum(c->mempool);
if (c->rw_mempool)
pa_mempool_vacuum(c->rw_mempool);
} }
pa_time_event* pa_core_rttime_new(pa_core *c, pa_usec_t usec, pa_time_event_cb_t cb, void *userdata) { pa_time_event* pa_core_rttime_new(pa_core *c, pa_usec_t usec, pa_time_event_cb_t cb, void *userdata) {

5
src/pulsecore/core.h
View file

@ -170,7 +170,10 @@ struct pa_core {
PA_LLIST_HEAD(pa_subscription_event, subscription_event_queue); PA_LLIST_HEAD(pa_subscription_event, subscription_event_queue);
pa_subscription_event *subscription_event_last; pa_subscription_event *subscription_event_last;
pa_mempool *mempool; /* The mempool is used for data we write to, it's readonly for the client.
The rw_mempool is used for data writable by both server and client (and
can be NULL in some cases). */
pa_mempool *mempool, *rw_mempool;
pa_silence_cache silence_cache; pa_silence_cache silence_cache;
pa_time_event *exit_event; pa_time_event *exit_event;