Seperate out Mutex and Signal code into reusable classes.
Change-Id: I381d09d89b567d433a10a91e0d7e59c24d3444d8
diff --git a/libs/rs/rsSignal.cpp b/libs/rs/rsSignal.cpp
new file mode 100644
index 0000000..9239bfd
--- /dev/null
+++ b/libs/rs/rsSignal.cpp
@@ -0,0 +1,98 @@
+/*
+ * Copyright (C) 2009 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "rsSignal.h"
+
+using namespace android;
+using namespace android::renderscript;
+
+
+Signal::Signal()
+{
+ mSet = true;
+}
+
+Signal::~Signal()
+{
+ pthread_mutex_destroy(&mMutex);
+ pthread_cond_destroy(&mCondition);
+}
+
+bool Signal::init()
+{
+ int status = pthread_mutex_init(&mMutex, NULL);
+ if (status) {
+ LOGE("LocklessFifo mutex init failure");
+ return false;
+ }
+
+ status = pthread_cond_init(&mCondition, NULL);
+ if (status) {
+ LOGE("LocklessFifo condition init failure");
+ pthread_mutex_destroy(&mMutex);
+ return false;
+ }
+
+ return true;
+}
+
+void Signal::set()
+{
+ int status;
+
+ status = pthread_mutex_lock(&mMutex);
+ if (status) {
+ LOGE("LocklessCommandFifo: error %i locking for set condition.", status);
+ return;
+ }
+
+ mSet = true;
+
+ status = pthread_cond_signal(&mCondition);
+ if (status) {
+ LOGE("LocklessCommandFifo: error %i on set condition.", status);
+ }
+
+ status = pthread_mutex_unlock(&mMutex);
+ if (status) {
+ LOGE("LocklessCommandFifo: error %i unlocking for set condition.", status);
+ }
+}
+
+void Signal::wait()
+{
+ int status;
+
+ status = pthread_mutex_lock(&mMutex);
+ if (status) {
+ LOGE("LocklessCommandFifo: error %i locking for condition.", status);
+ return;
+ }
+
+ if (!mSet) {
+ status = pthread_cond_wait(&mCondition, &mMutex);
+ if (status) {
+ LOGE("LocklessCommandFifo: error %i waiting on condition.", status);
+ }
+ }
+ mSet = false;
+
+ status = pthread_mutex_unlock(&mMutex);
+ if (status) {
+ LOGE("LocklessCommandFifo: error %i unlocking for condition.", status);
+ }
+}
+