From 682674154e3fe88f6061245145f934f25f1a2eb8 Mon Sep 17 00:00:00 2001
From: Dianne Hackborn <hackbod@google.com>
Date: Fri, 2 Jul 2010 18:52:01 -0700
Subject: Add new native Looper API.

This allows us to avoid exposing the file descriptor of
the event queue; instead, you attach an event queue to
a looper.  This will also should allow native apps to be
written without the need for a separate thread, by attaching
the event queue to the main thread's looper and scheduling
their own messages there.

Change-Id: I38489282635895ae2cbfacb88599c1b1cad9b239
---
 native/android/looper.cpp | 63 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100644 native/android/looper.cpp

(limited to 'native/android/looper.cpp')

diff --git a/native/android/looper.cpp b/native/android/looper.cpp
new file mode 100644
index 000000000000..6e78bbd03d12
--- /dev/null
+++ b/native/android/looper.cpp
@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2010 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.
+ */
+
+#define LOG_TAG "ALooper"
+#include <utils/Log.h>
+
+#include <android/looper.h>
+#include <utils/PollLoop.h>
+
+using android::PollLoop;
+using android::sp;
+
+ALooper* ALooper_forThread() {
+    return PollLoop::getForThread().get();
+}
+
+ALooper* ALooper_prepare() {
+    sp<PollLoop> loop = PollLoop::getForThread();
+    if (loop == NULL) {
+        loop = new PollLoop();
+        PollLoop::setForThread(loop);
+    }
+    return loop.get();
+}
+
+int32_t ALooper_pollOnce(int timeoutMillis) {
+    sp<PollLoop> loop = PollLoop::getForThread();
+    if (loop == NULL) {
+        LOGW("ALooper_pollOnce: No looper for this thread!");
+        return -1;
+    }
+    return loop->pollOnce(timeoutMillis) ? 1 : 0;
+}
+
+void ALooper_acquire(ALooper* looper) {
+    static_cast<PollLoop*>(looper)->incStrong((void*)ALooper_acquire);
+}
+
+void ALooper_release(ALooper* looper) {
+    static_cast<PollLoop*>(looper)->decStrong((void*)ALooper_acquire);
+}
+
+void ALooper_setCallback(ALooper* looper, int fd, int events,
+        ALooper_callbackFunc* callback, void* data) {
+    static_cast<PollLoop*>(looper)->setLooperCallback(fd, events, callback, data);
+}
+
+int32_t ALooper_removeCallback(ALooper* looper, int fd) {
+    return static_cast<PollLoop*>(looper)->removeCallback(fd) ? 1 : 0;
+}
-- 
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