hwbinder: remove blockUntilThreadAvailable

There are performance problems associated with it, and it is completely
unused here, so removing.

Bug: 168806193
Test: N/A
Change-Id: Iea8fef19fd7f7a6ff0fff413c9ff1b06b4349f29

4 files changed, 0 insertions, 19 deletions

diff --git a/IPCThreadState.cpp b/IPCThreadState.cpp
index 3acf2f5..fbb1705 100644
--- a/IPCThreadState.cpp
+++ b/IPCThreadState.cpp
@@ -421,18 +421,6 @@ void IPCThreadState::flushCommands()
     }
 }
 
-void IPCThreadState::blockUntilThreadAvailable()
-{
-    pthread_mutex_lock(&mProcess->mThreadCountLock);
-    while (mProcess->mExecutingThreadsCount >= mProcess->mMaxThreads) {
-        ALOGW("Waiting for thread to be free. mExecutingThreadsCount=%lu mMaxThreads=%lu\n",
-                static_cast<unsigned long>(mProcess->mExecutingThreadsCount),
-                static_cast<unsigned long>(mProcess->mMaxThreads));
-        pthread_cond_wait(&mProcess->mThreadCountDecrement, &mProcess->mThreadCountLock);
-    }
-    pthread_mutex_unlock(&mProcess->mThreadCountLock);
-}
-
 status_t IPCThreadState::getAndExecuteCommand()
 {
     status_t result;
@@ -472,7 +460,6 @@ status_t IPCThreadState::getAndExecuteCommand()
             }
             mProcess->mStarvationStartTimeMs = 0;
         }
-        pthread_cond_broadcast(&mProcess->mThreadCountDecrement);
         pthread_mutex_unlock(&mProcess->mThreadCountLock);
     }
 
diff --git a/ProcessState.cpp b/ProcessState.cpp
index bf54485..91aaed4 100644
--- a/ProcessState.cpp
+++ b/ProcessState.cpp
@@ -443,7 +443,6 @@ ProcessState::ProcessState(size_t mmapSize)
     : mDriverFD(open_driver())
     , mVMStart(MAP_FAILED)
     , mThreadCountLock(PTHREAD_MUTEX_INITIALIZER)
-    , mThreadCountDecrement(PTHREAD_COND_INITIALIZER)
     , mExecutingThreadsCount(0)
     , mMaxThreads(DEFAULT_MAX_BINDER_THREADS)
     , mStarvationStartTimeMs(0)
diff --git a/include/hwbinder/IPCThreadState.h b/include/hwbinder/IPCThreadState.h
index ca99591..85c0bfb 100644
--- a/include/hwbinder/IPCThreadState.h
+++ b/include/hwbinder/IPCThreadState.h
@@ -87,10 +87,6 @@ public:
 
     static  void                shutdown();
 
-            // Call blocks until the number of executing binder threads is less than
-            // the maximum number of binder threads threads allowed for this process.
-            void                blockUntilThreadAvailable();
-
             // Service manager registration
             void                setTheContextObject(sp<BHwBinder> obj);
 
diff --git a/include/hwbinder/ProcessState.h b/include/hwbinder/ProcessState.h
index b13559a..abd77a3 100644
--- a/include/hwbinder/ProcessState.h
+++ b/include/hwbinder/ProcessState.h
@@ -114,7 +114,6 @@ private:
 
             // Protects thread count variable below.
             pthread_mutex_t     mThreadCountLock;
-            pthread_cond_t      mThreadCountDecrement;
             // Number of binder threads current executing a command.
             size_t              mExecutingThreadsCount;
             // Maximum number for binder threads allowed for this process.