Add functions to lcidlc to allow externals to attach auxiliary threads to the Java VM on Android

techstrategies · techstrategies · commit 5033a9b004fb · 2016-05-23T16:13:47.000+10:00
diff --git a/lcidlc/include/LiveCode.h b/lcidlc/include/LiveCode.h
@@ -470,6 +470,30 @@ LCError LCArrayRemoveKeyWithPath(LCArrayRef array, unsigned int options, const c
 	
 ////////////////////////////////////////////////////////////////////////////////
 
+#ifdef __ANDROID__
+
+// Function:
+//   LCAttachCurrentThread
+// Parameters:
+//   none
+// Errors:
+//   Failed - System was unable to attach the current thread to the Java VM
+//
+LCError LCAttachCurrentThread(void);
+
+// Function:
+//   LCDetachCurrentThread
+// Parameters:
+//   none
+// Errors:
+//   Failed - System was unable to detach the current thread from the Java VM
+//
+LCError LCDetachCurrentThread(void);
+
+#endif
+
+////////////////////////////////////////////////////////////////////////////////
+
 typedef struct __LCObject *LCObjectRef;
 
 // Parameters:
diff --git a/lcidlc/src/Support.mm b/lcidlc/src/Support.mm
@@ -3218,6 +3218,25 @@ static bool verify__out_parameter(const char *arg, MCVariableRef var)
 	{ kJavaNativeTypeData, "java/nio/ByteBuffer", "array", "()[B", nil, nil },
 };
 
+LCError LCAttachCurrentThread(void)
+{
+	JNIEnv *t_env;
+
+	t_env = nil;
+	if (s_java_vm -> AttachCurrentThread(&t_env, nil) < 0)
+		return kLCErrorFailed;
+
+	return kLCErrorNone;
+}
+
+LCError LCDetachCurrentThread(void)
+{
+	if (s_java_vm -> DetachCurrentThread() < 0)
+		return kLCErrorFailed;
+
+	return kLCErrorNone;
+}
+
 static bool java__initialize(JNIEnv *env)
 {
 	for(uint32_t i = 0; i < sizeof(s_native_mappings) / sizeof(s_native_mappings[0]); i++)
