Add a way to check if we're the only binder thread
libhidl will want to know this when deciding whether to poll or to wait
for a callback.
Bug: 71625413
Test: builds, boots
Change-Id: I9b9b66791951cdcf9a50733c91800d6da8a278a2
diff --git a/IPCThreadState.cpp b/IPCThreadState.cpp
index 71f6023..a93ecab 100644
--- a/IPCThreadState.cpp
+++ b/IPCThreadState.cpp
@@ -539,6 +539,7 @@
// as that won't work with polling. Also, the caller is responsible
// for subsequently calling handlePolledCommands()
mProcess->setThreadPoolConfiguration(1, true /* callerWillJoin */);
+ mIsPollingThread = true;
mOut.writeInt32(BC_ENTER_LOOPER);
*fd = mProcess->mDriverFD;
@@ -707,7 +708,8 @@
mMyThreadId(gettid()),
mStrictModePolicy(0),
mLastTransactionBinderFlags(0),
- mIsLooper(false) {
+ mIsLooper(false),
+ mIsPollingThread(false) {
pthread_setspecific(gTLS, this);
clearCaller();
mIn.setDataCapacity(256);
@@ -969,6 +971,10 @@
return mIsLooper;
}
+bool IPCThreadState::isOnlyBinderThread() {
+ return (mIsLooper && mProcess->mMaxThreads <= 1) || mIsPollingThread;
+}
+
status_t IPCThreadState::executeCommand(int32_t cmd)
{
BHwBinder* obj;
diff --git a/include/hwbinder/IPCThreadState.h b/include/hwbinder/IPCThreadState.h
index 757e09e..43cd6f7 100644
--- a/include/hwbinder/IPCThreadState.h
+++ b/include/hwbinder/IPCThreadState.h
@@ -93,6 +93,8 @@
void setTheContextObject(sp<BHwBinder> obj);
bool isLooperThread();
+ bool isOnlyBinderThread();
+
private:
IPCThreadState();
~IPCThreadState();
@@ -133,6 +135,7 @@
int32_t mLastTransactionBinderFlags;
sp<BHwBinder> mContextObject;
bool mIsLooper;
+ bool mIsPollingThread;
};
}; // namespace hardware
