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The master branch has been updated
from 8dd0d871a7dd2d97c63ec8e38e1b408637d1b639 (commit)
- Log -----------------------------------------------------------------
01e4b61 aupdate: implicitly call _write_swap() if it wasn't called explicitly
-----------------------------------------------------------------------
Summary of changes:
src/pulsecore/aupdate.c | 8 ++++++++
src/pulsecore/aupdate.h | 4 ++++
2 files changed, 12 insertions(+), 0 deletions(-)
-----------------------------------------------------------------------
commit 01e4b61a910afdd21f860fadbe98075735c2bf51
Author: Lennart Poettering <[email protected]>
Date: Sun Aug 16 02:02:51 2009 +0200
aupdate: implicitly call _write_swap() if it wasn't called explicitly
diff --git a/src/pulsecore/aupdate.c b/src/pulsecore/aupdate.c
index 56ebb8e..85b6e00 100644
--- a/src/pulsecore/aupdate.c
+++ b/src/pulsecore/aupdate.c
@@ -39,6 +39,7 @@ struct pa_aupdate {
pa_atomic_t read_lock;
pa_mutex *write_lock;
pa_semaphore *semaphore;
+ pa_bool_t swapped;
};
pa_aupdate *pa_aupdate_new(void) {
@@ -101,6 +102,8 @@ unsigned pa_aupdate_write_begin(pa_aupdate *a) {
n = (unsigned) pa_atomic_load(&a->read_lock);
+ a->swapped = FALSE;
+
return !WHICH(n);
}
@@ -119,11 +122,16 @@ unsigned pa_aupdate_write_swap(pa_aupdate *a) {
break;
}
+ a->swapped = TRUE;
+
return WHICH(n);
}
void pa_aupdate_write_end(pa_aupdate *a) {
pa_assert(a);
+ if (!a->swapped)
+ pa_aupdate_write_swap(a);
+
pa_mutex_unlock(a->write_lock);
}
diff --git a/src/pulsecore/aupdate.h b/src/pulsecore/aupdate.h
index 072e382..fb38ffa 100644
--- a/src/pulsecore/aupdate.h
+++ b/src/pulsecore/aupdate.h
@@ -93,6 +93,10 @@ unsigned pa_aupdate_write_swap(pa_aupdate *a);
* pa_update_write_end(a)
* }
*
+ * In some cases keeping both structures up-to-date might not be
+ * necessary, since they are fully rebuilt on each iteration
+ * anyway. In that case you may leave the _write_swap() call out, it
+ * will then be done implicitly in the _write_end() invocation.
*/
#endif
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