cameraserver: Wrap calls to IPCThreadState functions to factor in different transports.
Add a wrapper around calls to IPCThreadState to
account for the fact that remote HIDL calls may use binder function
implementations internally.Therefore, we need to know whether we are on
a binder / hwbinder thread and call the appropriate IPCThreadState /
hardware::IPCThreadState function internally.
Bug: 110364143
Test: GCA
Test: Third party app
Test: camera CTS (no new failures).
Change-Id: Ibad03fafd2ccc53a5352a6df45cf8f641bc7a3bf
Signed-off-by: Jayant Chowdhary <jchowdhary@google.com>
diff --git a/services/camera/libcameraservice/utils/CameraThreadState.cpp b/services/camera/libcameraservice/utils/CameraThreadState.cpp
new file mode 100644
index 0000000..b9e344b
--- /dev/null
+++ b/services/camera/libcameraservice/utils/CameraThreadState.cpp
@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2018 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 "CameraThreadState.h"
+#include <binder/IPCThreadState.h>
+#include <hwbinder/IPCThreadState.h>
+#include <unistd.h>
+
+namespace android {
+
+int CameraThreadState::getCallingUid() {
+ if (hardware::IPCThreadState::self()->isServingCall()) {
+ return hardware::IPCThreadState::self()->getCallingUid();
+ }
+ return IPCThreadState::self()->getCallingUid();
+}
+
+int CameraThreadState::getCallingPid() {
+ if (hardware::IPCThreadState::self()->isServingCall()) {
+ return hardware::IPCThreadState::self()->getCallingPid();
+ }
+ return IPCThreadState::self()->getCallingPid();
+}
+
+int64_t CameraThreadState::clearCallingIdentity() {
+ if (hardware::IPCThreadState::self()->isServingCall()) {
+ return hardware::IPCThreadState::self()->clearCallingIdentity();
+ }
+ return IPCThreadState::self()->clearCallingIdentity();
+}
+
+void CameraThreadState::restoreCallingIdentity(int64_t token) {
+ if (hardware::IPCThreadState::self()->isServingCall()) {
+ hardware::IPCThreadState::self()->restoreCallingIdentity(token);
+ } else {
+ IPCThreadState::self()->restoreCallingIdentity(token);
+ }
+ return;
+}
+
+} // android