libutils Condition are now PRIVATE by default
Condition must be initialized with SHARED for the old behavior, where
they can be used accross processes.
Updated the two places android that require SHARED conditions.
PRIVATE conditions (and mutexes) use more efficient syscalls.
Change-Id: I9a281a4b88206e92ac559c66554e886b9c62db3a
diff --git a/include/utils/threads.h b/include/utils/threads.h
index 130d83c..5ac0c5e 100644
--- a/include/utils/threads.h
+++ b/include/utils/threads.h
@@ -209,7 +209,7 @@
class Mutex {
public:
enum {
- NORMAL = 0,
+ PRIVATE = 0,
SHARED = 1
};
@@ -305,7 +305,13 @@
*/
class Condition {
public:
+ enum {
+ PRIVATE = 0,
+ SHARED = 1
+ };
+
Condition();
+ Condition(int type);
~Condition();
// Wait on the condition variable. Lock the mutex before calling.
status_t wait(Mutex& mutex);
@@ -329,6 +335,17 @@
inline Condition::Condition() {
pthread_cond_init(&mCond, NULL);
}
+inline Condition::Condition(int type) {
+ if (type == SHARED) {
+ pthread_condattr_t attr;
+ pthread_condattr_init(&attr);
+ pthread_condattr_setpshared(&attr, PTHREAD_PROCESS_SHARED);
+ pthread_cond_init(&mCond, &attr);
+ pthread_condattr_destroy(&attr);
+ } else {
+ pthread_cond_init(&mCond, NULL);
+ }
+}
inline Condition::~Condition() {
pthread_cond_destroy(&mCond);
}
diff --git a/libs/surfaceflinger_client/SharedBufferStack.cpp b/libs/surfaceflinger_client/SharedBufferStack.cpp
index 65ce1c1..a17e8ac 100644
--- a/libs/surfaceflinger_client/SharedBufferStack.cpp
+++ b/libs/surfaceflinger_client/SharedBufferStack.cpp
@@ -34,7 +34,7 @@
// ----------------------------------------------------------------------------
SharedClient::SharedClient()
- : lock(Mutex::SHARED)
+ : lock(Mutex::SHARED), cv(Condition::SHARED)
{
}
diff --git a/media/libmedia/AudioTrack.cpp b/media/libmedia/AudioTrack.cpp
index 74852dc..cd7bcd5 100644
--- a/media/libmedia/AudioTrack.cpp
+++ b/media/libmedia/AudioTrack.cpp
@@ -983,8 +983,10 @@
// =========================================================================
audio_track_cblk_t::audio_track_cblk_t()
- : lock(Mutex::SHARED), user(0), server(0), userBase(0), serverBase(0), buffers(0), frameCount(0),
- loopStart(UINT_MAX), loopEnd(UINT_MAX), loopCount(0), volumeLR(0), flowControlFlag(1), forceReady(0)
+ : lock(Mutex::SHARED), cv(Condition::SHARED), user(0), server(0),
+ userBase(0), serverBase(0), buffers(0), frameCount(0),
+ loopStart(UINT_MAX), loopEnd(UINT_MAX), loopCount(0), volumeLR(0),
+ flowControlFlag(1), forceReady(0)
{
}