Merge pull request #140 from kipr/js-yield-b4-reg-write

[JS] Catch up on pending register values before writing registers

src/wallaby_p.cpp

@@ -244,6 +244,7 @@ void Wallaby::writeRegister8b(unsigned char address, unsigned char value)
 	std::lock_guard<std::mutex> lock(transfer_mutex_);
 
 	#ifdef TARGET_EMSCRIPTEN
+	emscripten_sleep(0);
 	unsigned char addresses[] = {address};
 	unsigned char values[] = {value};
 	updateRegisters(addresses, values, 1);
@@ -298,6 +299,7 @@ void Wallaby::writeRegister16b(unsigned char address, unsigned short value)
 	std::lock_guard<std::mutex> lock(transfer_mutex_);
 
 	#ifdef TARGET_EMSCRIPTEN
+	emscripten_sleep(0);
 	unsigned char addresses[] = {address, static_cast<unsigned char>(address + 1)};
 	unsigned char values[] = {value1, value2};
 	updateRegisters(addresses, values, 2);
@@ -363,6 +365,7 @@ void Wallaby::writeRegister32b(unsigned char address, unsigned int value)
 	std::lock_guard<std::mutex> lock(transfer_mutex_);
 
 	#ifdef TARGET_EMSCRIPTEN
+	emscripten_sleep(0);
 	unsigned char addresses[] = {address, static_cast<unsigned char>(address + 1), static_cast<unsigned char>(address + 2), static_cast<unsigned char>(address + 3)};
 	unsigned char values[] = {value1, value2, value3, value4};
 	updateRegisters(addresses, values, 4);