Android: Refactor exception checking in qjni.

In places where we call java/jni functions that can throw exceptions,
we check and clear the exception, if necessary. This change moves
the "checking" code into a single (private) function.

Change-Id: Ic3de2be51305972b096e1ed0a477e341eb5d9404
Reviewed-by: Yoann Lopes <yoann.lopes@digia.com>

1 files changed, 16 insertions, 19 deletions

diff --git a/src/corelib/kernel/qjni.cpp b/src/corelib/kernel/qjni.cpp
index 437205bf92..aa9b196e62 100644
--- a/src/corelib/kernel/qjni.cpp
+++ b/src/corelib/kernel/qjni.cpp
@@ -67,6 +67,19 @@ static QString qt_convertJString(jstring string)
     return res;
 }
 
+static inline bool exceptionCheckAndClear(JNIEnv *env)
+{
+    if (Q_UNLIKELY(env->ExceptionCheck())) {
+#ifdef QT_DEBUG
+        env->ExceptionDescribe();
+#endif // QT_DEBUG
+        env->ExceptionClear();
+        return true;
+    }
+
+    return false;
+}
+
 typedef QHash<QString, jclass> JClassHash;
 Q_GLOBAL_STATIC(JClassHash, cachedClasses)
 
@@ -85,14 +98,8 @@ static jclass getCachedClass(JNIEnv *env, const char *className)
         QJNIObjectPrivate classObject = classLoader.callObjectMethod("loadClass",
                                                                      "(Ljava/lang/String;)Ljava/lang/Class;",
                                                                      stringName.object());
-        if (env->ExceptionCheck()) {
-#ifdef QT_DEBUG
-            env->ExceptionDescribe();
-#endif // QT_DEBUG
-            env->ExceptionClear();
-        }
 
-        if (classObject.isValid())
+        if (!exceptionCheckAndClear(env) && classObject.isValid())
             clazz = static_cast<jclass>(env->NewGlobalRef(classObject.object()));
 
         cachedClasses->insert(key, clazz);
@@ -121,13 +128,8 @@ static jmethodID getCachedMethodID(JNIEnv *env,
         else
             id = env->GetMethodID(clazz, name, sig);
 
-        if (env->ExceptionCheck()) {
+        if (exceptionCheckAndClear(env))
             id = 0;
-#ifdef QT_DEBUG
-            env->ExceptionDescribe();
-#endif // QT_DEBUG
-            env->ExceptionClear();
-        }
 
         cachedMethodID->insert(key, id);
     } else {
@@ -154,13 +156,8 @@ static jfieldID getCachedFieldID(JNIEnv *env,
         else
             id = env->GetFieldID(clazz, name, sig);
 
-        if (env->ExceptionCheck()) {
+        if (exceptionCheckAndClear(env))
             id = 0;
-#ifdef QT_DEBUG
-            env->ExceptionDescribe();
-#endif // QT_DEBUG
-            env->ExceptionClear();
-        }
 
         cachedFieldID->insert(key, id);
     } else {