test: fix intermittent TSFN crashes

KevinEady · mhdawson · commit 63a6c32e8098 · 2021-04-23T16:14:30.000-04:00
PR-URL: #974 Reviewed-By: Michael Dawson <midawson@redhat.com>
diff --git a/test/binding.cc b/test/binding.cc
@@ -121,7 +121,7 @@ Object Init(Env env, Object exports) {
   exports.Set("threadsafe_function_ptr", InitThreadSafeFunctionPtr(env));
   exports.Set("threadsafe_function_sum", InitThreadSafeFunctionSum(env));
   exports.Set("threadsafe_function_unref", InitThreadSafeFunctionUnref(env));
-  exports.Set("threadsafe_function", InitTypedThreadSafeFunction(env));
+  exports.Set("threadsafe_function", InitThreadSafeFunction(env));
   exports.Set("typed_threadsafe_function_ctx",
               InitTypedThreadSafeFunctionCtx(env));
   exports.Set("typed_threadsafe_function_existing_tsfn",
diff --git a/test/threadsafe_function/threadsafe_function.cc b/test/threadsafe_function/threadsafe_function.cc
@@ -1,4 +1,6 @@
 #include <chrono>
+#include <condition_variable>
+#include <mutex>
 #include <thread>
 #include "napi.h"
 
@@ -22,6 +24,9 @@ struct ThreadSafeFunctionInfo {
   bool startSecondary;
   FunctionReference jsFinalizeCallback;
   uint32_t maxQueueSize;
+  bool closeCalledFromJs;
+  std::mutex protect;
+  std::condition_variable signal;
 } tsfnInfo;
 
 // Thread data to transmit to JS
@@ -65,12 +70,13 @@ static void DataSourceThread() {
         break;
     }
 
-    if (info->maxQueueSize == 0) {
-      // Let's make this thread really busy for 200 ms to give the main thread a
-      // chance to abort.
-      auto start = std::chrono::high_resolution_clock::now();
-      constexpr auto MS_200 = std::chrono::milliseconds(200);
-      for (; std::chrono::high_resolution_clock::now() - start < MS_200;);
+    if (info->abort && info->type != ThreadSafeFunctionInfo::NON_BLOCKING) {
+      // Let's make this thread really busy to give the main thread a chance to
+      // abort / close.
+      std::unique_lock<std::mutex> lk(info->protect);
+      while (!info->closeCalledFromJs) {
+        info->signal.wait(lk);
+      }
     }
 
     switch (status) {
@@ -112,6 +118,11 @@ static Value StopThread(const CallbackInfo& info) {
   } else {
     tsfn.Release();
   }
+  {
+    std::lock_guard<std::mutex> _(tsfnInfo.protect);
+    tsfnInfo.closeCalledFromJs = true;
+    tsfnInfo.signal.notify_one();
+  }
   return Value();
 }
 
@@ -134,6 +145,7 @@ static Value StartThreadInternal(const CallbackInfo& info,
   tsfnInfo.abort = info[1].As<Boolean>();
   tsfnInfo.startSecondary = info[2].As<Boolean>();
   tsfnInfo.maxQueueSize = info[3].As<Number>().Uint32Value();
+  tsfnInfo.closeCalledFromJs = false;
 
   tsfn = ThreadSafeFunction::New(info.Env(), info[0].As<Function>(),
       "Test", tsfnInfo.maxQueueSize, 2, &tsfnInfo, JoinTheThreads, threads);
diff --git a/test/typed_threadsafe_function/typed_threadsafe_function.cc b/test/typed_threadsafe_function/typed_threadsafe_function.cc
@@ -1,4 +1,6 @@
 #include <chrono>
+#include <condition_variable>
+#include <mutex>
 #include <thread>
 #include "napi.h"
 
@@ -17,6 +19,9 @@ static struct ThreadSafeFunctionInfo {
   bool startSecondary;
   FunctionReference jsFinalizeCallback;
   uint32_t maxQueueSize;
+  bool closeCalledFromJs;
+  std::mutex protect;
+  std::condition_variable signal;
 } tsfnInfo;
 
 static void TSFNCallJS(Env env,
@@ -42,7 +47,7 @@ static int ints[ARRAY_LENGTH];
 
 static void SecondaryThread() {
   if (tsfn.Release() != napi_ok) {
-    Error::Fatal("SecondaryThread", "ThreadSafeFunction.Release() failed");
+    Error::Fatal("TypedSecondaryThread", "ThreadSafeFunction.Release() failed");
   }
 }
 
@@ -52,7 +57,8 @@ static void DataSourceThread() {
 
   if (info->startSecondary) {
     if (tsfn.Acquire() != napi_ok) {
-      Error::Fatal("DataSourceThread", "ThreadSafeFunction.Acquire() failed");
+      Error::Fatal("TypedDataSourceThread",
+                   "ThreadSafeFunction.Acquire() failed");
     }
 
     threads[1] = std::thread(SecondaryThread);
@@ -75,13 +81,13 @@ static void DataSourceThread() {
         break;
     }
 
-    if (info->maxQueueSize == 0) {
-      // Let's make this thread really busy for 200 ms to give the main thread a
-      // chance to abort.
-      auto start = std::chrono::high_resolution_clock::now();
-      constexpr auto MS_200 = std::chrono::milliseconds(200);
-      for (; std::chrono::high_resolution_clock::now() - start < MS_200;)
-        ;
+    if (info->abort && info->type != ThreadSafeFunctionInfo::NON_BLOCKING) {
+      // Let's make this thread really busy to give the main thread a chance to
+      // abort / close.
+      std::unique_lock<std::mutex> lk(info->protect);
+      while (!info->closeCalledFromJs) {
+        info->signal.wait(lk);
+      }
     }
 
     switch (status) {
@@ -98,20 +104,22 @@ static void DataSourceThread() {
         break;
 
       default:
-        Error::Fatal("DataSourceThread", "ThreadSafeFunction.*Call() failed");
+        Error::Fatal("TypedDataSourceThread",
+                     "ThreadSafeFunction.*Call() failed");
     }
   }
 
   if (info->type == ThreadSafeFunctionInfo::NON_BLOCKING && !queueWasFull) {
-    Error::Fatal("DataSourceThread", "Queue was never full");
+    Error::Fatal("TypedDataSourceThread", "Queue was never full");
   }
 
   if (info->abort && !queueWasClosing) {
-    Error::Fatal("DataSourceThread", "Queue was never closing");
+    Error::Fatal("TypedDataSourceThread", "Queue was never closing");
   }
 
   if (!queueWasClosing && tsfn.Release() != napi_ok) {
-    Error::Fatal("DataSourceThread", "ThreadSafeFunction.Release() failed");
+    Error::Fatal("TypedDataSourceThread",
+                 "ThreadSafeFunction.Release() failed");
   }
 }
 
@@ -123,6 +131,11 @@ static Value StopThread(const CallbackInfo& info) {
   } else {
     tsfn.Release();
   }
+  {
+    std::lock_guard<std::mutex> _(tsfnInfo.protect);
+    tsfnInfo.closeCalledFromJs = true;
+    tsfnInfo.signal.notify_one();
+  }
   return Value();
 }
 
@@ -145,6 +158,7 @@ static Value StartThreadInternal(const CallbackInfo& info,
   tsfnInfo.abort = info[1].As<Boolean>();
   tsfnInfo.startSecondary = info[2].As<Boolean>();
   tsfnInfo.maxQueueSize = info[3].As<Number>().Uint32Value();
+  tsfnInfo.closeCalledFromJs = false;
 
   tsfn = TSFN::New(info.Env(),
                    info[0].As<Function>(),
@@ -163,7 +177,7 @@ static Value StartThreadInternal(const CallbackInfo& info,
 
 static Value Release(const CallbackInfo& /* info */) {
   if (tsfn.Release() != napi_ok) {
-    Error::Fatal("Release", "ThreadSafeFunction.Release() failed");
+    Error::Fatal("Release", "TypedThreadSafeFunction.Release() failed");
   }
   return Value();
 }
