diff --git a/jni.odin b/jni.odin
index b3c9a04..8ebe116 100644
--- a/jni.odin
+++ b/jni.odin
@@ -97,7 +97,7 @@ JNINativeInterface :: struct {
 
     GetVersion: #type proc "c" (jni: ^^JNINativeInterface) -> jint,
 
-    DefineClass: #type proc "c" (jni: ^^JNINativeInterface, name: cstring, loader: jobject, #by_ptr buf: jbyte, bufLen: jsize) -> jclass,
+    DefineClass: #type proc "c" (jni: ^^JNINativeInterface, name: cstring, loader: jobject, buf: [^]jbyte, bufLen: jsize) -> jclass,
     FindClass: #type proc "c" (jni: ^^JNINativeInterface, name: cstring) -> jclass,
 
     FromReflectedMethod: #type proc "c" (jni: ^^JNINativeInterface, method: jobject) -> jmethodID,
@@ -113,7 +113,7 @@ JNINativeInterface :: struct {
 
     Throw: #type proc "c" (jni: ^^JNINativeInterface, obj: jthrowable) -> jint,
     ThrowNew: #type proc "c" (jni: ^^JNINativeInterface, clazz: jclass, message: cstring) -> jint,
-    ExceptionOccurred: #type proc "c" (jni: ^^JNINativeInterface),
+    ExceptionOccurred: #type proc "c" (jni: ^^JNINativeInterface) -> jthrowable,
     ExceptionDescribe: #type proc "c" (jni: ^^JNINativeInterface),
     ExceptionClear: #type proc "c" (jni: ^^JNINativeInterface),
     FatalError: #type proc "c" (jni: ^^JNINativeInterface, msg: cstring),
@@ -132,7 +132,7 @@ JNINativeInterface :: struct {
     AllocObject: #type proc "c" (jni: ^^JNINativeInterface, clazz: jclass) -> jobject,
     NewObject: #type proc "c" (jni: ^^JNINativeInterface, clazz: jclass, methodID: jmethodID, #c_vararg args: ..any) -> jobject,
     NewObjectV: #type proc "c" (jni: ^^JNINativeInterface, clazz: jclass, methodID: jmethodID, args: ^c.va_list) -> jobject,
-    NewObjectA: #type proc "c" (jni: ^^JNINativeInterface, clazz: jclass, methodID: jmethodID, #by_ptr args: jvalue) -> jobject,
+    NewObjectA: #type proc "c" (jni: ^^JNINativeInterface, clazz: jclass, methodID: jmethodID, args: [^]jvalue) -> jobject,
 
     GetObjectClass: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject) -> jclass,
     IsInstanceOf: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, clazz: jclass) -> jboolean,
@@ -141,65 +141,65 @@ JNINativeInterface :: struct {
 	// TODO: should va_list args be pointers?
     CallObjectMethod: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, methodID: jmethodID, #c_vararg args: ..any) -> jobject,
     CallObjectMethodV: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, methodID: jmethodID, args: ^c.va_list) -> jobject,
-    CallObjectMethodA: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, methodID: jmethodID, #by_ptr args: jvalue) -> jobject,
+    CallObjectMethodA: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, methodID: jmethodID, args: [^]jvalue) -> jobject,
     CallBooleanMethod: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, methodID: jmethodID, #c_vararg args: ..any) -> jboolean,
     CallBooleanMethodV: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, methodID: jmethodID, args: ^c.va_list) -> jboolean,
-    CallBooleanMethodA: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, methodID: jmethodID, #by_ptr args: jvalue) -> jboolean,
+    CallBooleanMethodA: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, methodID: jmethodID, args: [^]jvalue) -> jboolean,
     CallByteMethod: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, methodID: jmethodID, #c_vararg args: ..any) -> jbyte,
     CallByteMethodV: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, methodID: jmethodID, args: ^c.va_list) -> jbyte,
-    CallByteMethodA: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, methodID: jmethodID, #by_ptr args: jvalue) -> jbyte,
+    CallByteMethodA: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, methodID: jmethodID, args: [^]jvalue) -> jbyte,
     CallCharMethod: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, methodID: jmethodID, #c_vararg args: ..any) -> jchar,
     CallCharMethodV: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, methodID: jmethodID, args: ^c.va_list) -> jchar,
-    CallCharMethodA: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, methodID: jmethodID, #by_ptr args: jvalue) -> jchar,
+    CallCharMethodA: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, methodID: jmethodID, args: [^]jvalue) -> jchar,
     CallShortMethod: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, methodID: jmethodID, #c_vararg args: ..any) -> jshort,
     CallShortMethodV: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, methodID: jmethodID, args: ^c.va_list) -> jshort,
-    CallShortMethodA: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, methodID: jmethodID, #by_ptr args: jvalue) -> jshort,
+    CallShortMethodA: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, methodID: jmethodID, args: [^]jvalue) -> jshort,
     CallIntMethod: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, methodID: jmethodID, #c_vararg args: ..any) -> jint,
     CallIntMethodV: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, methodID: jmethodID, args: ^c.va_list) -> jint,
-    CallIntMethodA: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, methodID: jmethodID, #by_ptr args: jvalue) -> jint,
+    CallIntMethodA: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, methodID: jmethodID, args: [^]jvalue) -> jint,
     CallLongMethod: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, methodID: jmethodID, #c_vararg args: ..any) -> jlong,
     CallLongMethodV: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, methodID: jmethodID, args: ^c.va_list) -> jlong,
-    CallLongMethodA: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, methodID: jmethodID, #by_ptr args: jvalue) -> jlong,
+    CallLongMethodA: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, methodID: jmethodID, args: [^]jvalue) -> jlong,
     CallFloatMethod: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, methodID: jmethodID, #c_vararg args: ..any) -> jfloat,
     CallFloatMethodV: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, methodID: jmethodID, args: ^c.va_list) -> jfloat,
-    CallFloatMethodA: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, methodID: jmethodID, #by_ptr args: jvalue) -> jfloat,
+    CallFloatMethodA: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, methodID: jmethodID, args: [^]jvalue) -> jfloat,
     CallDoubleMethod: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, methodID: jmethodID, #c_vararg args: ..any) -> jdouble,
     CallDoubleMethodV: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, methodID: jmethodID, args: ^c.va_list) -> jdouble,
-    CallDoubleMethodA: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, methodID: jmethodID, #by_ptr args: jvalue) -> jdouble,
+    CallDoubleMethodA: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, methodID: jmethodID, args: [^]jvalue) -> jdouble,
     CallVoidMethod: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, methodID: jmethodID, #c_vararg args: ..any),
     CallVoidMethodV: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, methodID: jmethodID, args: ^c.va_list),
-    CallVoidMethodA: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, methodID: jmethodID, #by_ptr args: jvalue),
+    CallVoidMethodA: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, methodID: jmethodID, args: [^]jvalue),
 
     CallNonvirtualObjectMethod: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, clazz: jclass, methodID: jmethodID, #c_vararg args: ..any) -> jobject,
     CallNonvirtualObjectMethodV: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, clazz: jclass, methodID: jmethodID, args: ^c.va_list) -> jobject,
-    CallNonvirtualObjectMethodA: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, clazz: jclass, methodID: jmethodID, #by_ptr args: jvalue) -> jobject,
+    CallNonvirtualObjectMethodA: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, clazz: jclass, methodID: jmethodID, args: [^]jvalue) -> jobject,
     CallNonvirtualBooleanMethod: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, clazz: jclass, methodID: jmethodID, #c_vararg args: ..any) -> jboolean,
     CallNonvirtualBooleanMethodV: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, clazz: jclass, methodID: jmethodID, args: ^c.va_list) -> jboolean,
-    CallNonvirtualBooleanMethodA: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, clazz: jclass, methodID: jmethodID, #by_ptr args: jvalue) -> jboolean,
+    CallNonvirtualBooleanMethodA: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, clazz: jclass, methodID: jmethodID, args: [^]jvalue) -> jboolean,
     CallNonvirtualByteMethod: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, clazz: jclass, methodID: jmethodID, #c_vararg args: ..any) -> jbyte,
     CallNonvirtualByteMethodV: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, clazz: jclass, methodID: jmethodID, args: ^c.va_list) -> jbyte,
-    CallNonvirtualByteMethodA: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, clazz: jclass, methodID: jmethodID, #by_ptr args: jvalue) -> jbyte,
+    CallNonvirtualByteMethodA: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, clazz: jclass, methodID: jmethodID, args: [^]jvalue) -> jbyte,
     CallNonvirtualCharMethod: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, clazz: jclass, methodID: jmethodID, #c_vararg args: ..any) -> jchar,
     CallNonvirtualCharMethodV: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, clazz: jclass, methodID: jmethodID, args: ^c.va_list) -> jchar,
-    CallNonvirtualCharMethodA: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, clazz: jclass, methodID: jmethodID, #by_ptr args: jvalue) -> jchar,
+    CallNonvirtualCharMethodA: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, clazz: jclass, methodID: jmethodID, args: [^]jvalue) -> jchar,
     CallNonvirtualShortMethod: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, clazz: jclass, methodID: jmethodID, #c_vararg args: ..any) -> jshort,
     CallNonvirtualShortMethodV: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, clazz: jclass, methodID: jmethodID, args: ^c.va_list) -> jshort,
-    CallNonvirtualShortMethodA: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, clazz: jclass, methodID: jmethodID, #by_ptr args: jvalue) -> jshort,
+    CallNonvirtualShortMethodA: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, clazz: jclass, methodID: jmethodID, args: [^]jvalue) -> jshort,
     CallNonvirtualIntMethod: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, clazz: jclass, methodID: jmethodID, #c_vararg args: ..any) -> jint,
     CallNonvirtualIntMethodV: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, clazz: jclass, methodID: jmethodID, args: ^c.va_list) -> jint,
-    CallNonvirtualIntMethodA: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, clazz: jclass, methodID: jmethodID, #by_ptr args: jvalue) -> jint,
+    CallNonvirtualIntMethodA: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, clazz: jclass, methodID: jmethodID, args: [^]jvalue) -> jint,
     CallNonvirtualLongMethod: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, clazz: jclass, methodID: jmethodID, #c_vararg args: ..any) -> jlong,
     CallNonvirtualLongMethodV: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, clazz: jclass, methodID: jmethodID, args: ^c.va_list) -> jlong,
-    CallNonvirtualLongMethodA: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, clazz: jclass, methodID: jmethodID, #by_ptr args: jvalue) -> jlong,
+    CallNonvirtualLongMethodA: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, clazz: jclass, methodID: jmethodID, args: [^]jvalue) -> jlong,
     CallNonvirtualFloatMethod: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, clazz: jclass, methodID: jmethodID, #c_vararg args: ..any) -> jfloat,
     CallNonvirtualFloatMethodV: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, clazz: jclass, methodID: jmethodID, args: ^c.va_list) -> jfloat,
-    CallNonvirtualFloatMethodA: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, clazz: jclass, methodID: jmethodID, #by_ptr args: jvalue) -> jfloat,
+    CallNonvirtualFloatMethodA: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, clazz: jclass, methodID: jmethodID, args: [^]jvalue) -> jfloat,
     CallNonvirtualDoubleMethod: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, clazz: jclass, methodID: jmethodID, #c_vararg args: ..any) -> jdouble,
     CallNonvirtualDoubleMethodV: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, clazz: jclass, methodID: jmethodID, args: ^c.va_list) -> jdouble,
-    CallNonvirtualDoubleMethodA: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, clazz: jclass, methodID: jmethodID, #by_ptr args: jvalue) -> jdouble,
+    CallNonvirtualDoubleMethodA: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, clazz: jclass, methodID: jmethodID, args: [^]jvalue) -> jdouble,
     CallNonvirtualVoidMethod: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, clazz: jclass, methodID: jmethodID, #c_vararg args: ..any),
     CallNonvirtualVoidMethodV: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, clazz: jclass, methodID: jmethodID, args: ^c.va_list),
-    CallNonvirtualVoidMethodA: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, clazz: jclass, methodID: jmethodID, #by_ptr args: jvalue),
+    CallNonvirtualVoidMethodA: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject, clazz: jclass, methodID: jmethodID, args: [^]jvalue),
 
     GetFieldID: #type proc "c" (jni: ^^JNINativeInterface, clazz: jclass, name: cstring, sig: cstring) -> jfieldID,
 
@@ -227,34 +227,34 @@ JNINativeInterface :: struct {
 
     CallStaticObjectMethod: #type proc "c" (jni: ^^JNINativeInterface, clazz: jclass, methodID: jmethodID, #c_vararg args: ..any) -> jobject,
     CallStaticObjectMethodV: #type proc "c" (jni: ^^JNINativeInterface, clazz: jclass, methodID: jmethodID, args: ^c.va_list) -> jobject,
-    CallStaticObjectMethodA: #type proc "c" (jni: ^^JNINativeInterface, clazz: jclass, methodID: jmethodID, #by_ptr args: jvalue) -> jobject,
+    CallStaticObjectMethodA: #type proc "c" (jni: ^^JNINativeInterface, clazz: jclass, methodID: jmethodID, args: [^]jvalue) -> jobject,
     CallStaticBooleanMethod: #type proc "c" (jni: ^^JNINativeInterface, clazz: jclass, methodID: jmethodID, #c_vararg args: ..any) -> jboolean,
     CallStaticBooleanMethodV: #type proc "c" (jni: ^^JNINativeInterface, clazz: jclass, methodID: jmethodID, args: ^c.va_list) -> jboolean,
-    CallStaticBooleanMethodA: #type proc "c" (jni: ^^JNINativeInterface, clazz: jclass, methodID: jmethodID, #by_ptr args: jvalue) -> jboolean,
+    CallStaticBooleanMethodA: #type proc "c" (jni: ^^JNINativeInterface, clazz: jclass, methodID: jmethodID, args: [^]jvalue) -> jboolean,
     CallStaticByteMethod: #type proc "c" (jni: ^^JNINativeInterface, clazz: jclass, methodID: jmethodID, #c_vararg args: ..any) -> jbyte,
     CallStaticByteMethodV: #type proc "c" (jni: ^^JNINativeInterface, clazz: jclass, methodID: jmethodID, args: ^c.va_list) -> jbyte,
-    CallStaticByteMethodA: #type proc "c" (jni: ^^JNINativeInterface, clazz: jclass, methodID: jmethodID, #by_ptr args: jvalue) -> jbyte,
+    CallStaticByteMethodA: #type proc "c" (jni: ^^JNINativeInterface, clazz: jclass, methodID: jmethodID, args: [^]jvalue) -> jbyte,
     CallStaticCharMethod: #type proc "c" (jni: ^^JNINativeInterface, clazz: jclass, methodID: jmethodID, #c_vararg args: ..any) -> jchar,
     CallStaticCharMethodV: #type proc "c" (jni: ^^JNINativeInterface, clazz: jclass, methodID: jmethodID, args: ^c.va_list) -> jchar,
-    CallStaticCharMethodA: #type proc "c" (jni: ^^JNINativeInterface, clazz: jclass, methodID: jmethodID, #by_ptr args: jvalue) -> jchar,
+    CallStaticCharMethodA: #type proc "c" (jni: ^^JNINativeInterface, clazz: jclass, methodID: jmethodID, args: [^]jvalue) -> jchar,
     CallStaticShortMethod: #type proc "c" (jni: ^^JNINativeInterface, clazz: jclass, methodID: jmethodID, #c_vararg args: ..any) -> jshort,
     CallStaticShortMethodV: #type proc "c" (jni: ^^JNINativeInterface, clazz: jclass, methodID: jmethodID, args: ^c.va_list) -> jshort,
-    CallStaticShortMethodA: #type proc "c" (jni: ^^JNINativeInterface, clazz: jclass, methodID: jmethodID, #by_ptr args: jvalue) -> jshort,
+    CallStaticShortMethodA: #type proc "c" (jni: ^^JNINativeInterface, clazz: jclass, methodID: jmethodID, args: [^]jvalue) -> jshort,
     CallStaticIntMethod: #type proc "c" (jni: ^^JNINativeInterface, clazz: jclass, methodID: jmethodID, #c_vararg args: ..any) -> jint,
     CallStaticIntMethodV: #type proc "c" (jni: ^^JNINativeInterface, clazz: jclass, methodID: jmethodID, args: ^c.va_list) -> jint,
-    CallStaticIntMethodA: #type proc "c" (jni: ^^JNINativeInterface, clazz: jclass, methodID: jmethodID, #by_ptr args: jvalue) -> jint,
+    CallStaticIntMethodA: #type proc "c" (jni: ^^JNINativeInterface, clazz: jclass, methodID: jmethodID, args: [^]jvalue) -> jint,
     CallStaticLongMethod: #type proc "c" (jni: ^^JNINativeInterface, clazz: jclass, methodID: jmethodID, #c_vararg args: ..any) -> jlong,
     CallStaticLongMethodV: #type proc "c" (jni: ^^JNINativeInterface, clazz: jclass, methodID: jmethodID, args: ^c.va_list) -> jlong,
-    CallStaticLongMethodA: #type proc "c" (jni: ^^JNINativeInterface, clazz: jclass, methodID: jmethodID, #by_ptr args: jvalue) -> jlong,
+    CallStaticLongMethodA: #type proc "c" (jni: ^^JNINativeInterface, clazz: jclass, methodID: jmethodID, args: [^]jvalue) -> jlong,
     CallStaticFloatMethod: #type proc "c" (jni: ^^JNINativeInterface, clazz: jclass, methodID: jmethodID, #c_vararg args: ..any) -> jfloat,
     CallStaticFloatMethodV: #type proc "c" (jni: ^^JNINativeInterface, clazz: jclass, methodID: jmethodID, args: ^c.va_list) -> jfloat,
-    CallStaticFloatMethodA: #type proc "c" (jni: ^^JNINativeInterface, clazz: jclass, methodID: jmethodID, #by_ptr args: jvalue) -> jfloat,
+    CallStaticFloatMethodA: #type proc "c" (jni: ^^JNINativeInterface, clazz: jclass, methodID: jmethodID, args: [^]jvalue) -> jfloat,
     CallStaticDoubleMethod: #type proc "c" (jni: ^^JNINativeInterface, clazz: jclass, methodID: jmethodID, #c_vararg args: ..any) -> jdouble,
     CallStaticDoubleMethodV: #type proc "c" (jni: ^^JNINativeInterface, clazz: jclass, methodID: jmethodID, args: ^c.va_list) -> jdouble,
-    CallStaticDoubleMethodA: #type proc "c" (jni: ^^JNINativeInterface, clazz: jclass, methodID: jmethodID, #by_ptr args: jvalue) -> jdouble,
+    CallStaticDoubleMethodA: #type proc "c" (jni: ^^JNINativeInterface, clazz: jclass, methodID: jmethodID, args: [^]jvalue) -> jdouble,
     CallStaticVoidMethod: #type proc "c" (jni: ^^JNINativeInterface, clazz: jclass, methodID: jmethodID, #c_vararg args: ..any),
     CallStaticVoidMethodV: #type proc "c" (jni: ^^JNINativeInterface, clazz: jclass, methodID: jmethodID, args: ^c.va_list),
-    CallStaticVoidMethodA: #type proc "c" (jni: ^^JNINativeInterface, clazz: jclass, methodID: jmethodID, #by_ptr args: jvalue),
+    CallStaticVoidMethodA: #type proc "c" (jni: ^^JNINativeInterface, clazz: jclass, methodID: jmethodID, args: [^]jvalue),
 
     GetStaticFieldID: #type proc "c" (jni: ^^JNINativeInterface, clazz: jclass, name: cstring, sig: cstring) -> jfieldID,
 
@@ -356,7 +356,7 @@ JNINativeInterface :: struct {
     NewWeakGlobalRef: #type proc "c" (jni: ^^JNINativeInterface, obj: jobject) -> jweak,
     DeleteWeakGlobalRef: #type proc "c" (jni: ^^JNINativeInterface, obj: jweak),
 
-    ExceptionCheck: #type proc "c" (jni: ^^JNINativeInterface),
+    ExceptionCheck: #type proc "c" (jni: ^^JNINativeInterface) -> jboolean,
 
     NewDirectByteBuffer: #type proc "c" (jni: ^^JNINativeInterface, address: rawptr, capacity: jlong) -> jobject,
     GetDirectBufferAddress: #type proc "c" (jni: ^^JNINativeInterface, buf: jobject) -> rawptr,