void rewind(FILE* stream) {
g_atomic_lock(&stream->lock);
__fseeko_unlocked(stream, 0, SEEK_SET);
__clearerr_unlocked(stream);
stream->lock = 0;
}
int putc(int c, FILE* stream) {
g_atomic_lock(&stream->lock);
int res = __fputc_unlocked(c, stream);
stream->lock = 0;
return res;
}
size_t fwrite(const void* ptr, size_t size, size_t nmemb, FILE* stream) {
g_atomic_lock(&stream->lock);
size_t len = __fwrite_unlocked(ptr, size, nmemb, stream);
stream->lock = 0;
return len;
}
int fgetc(FILE* stream) {
g_atomic_lock(&stream->lock);
int res = __fgetc_unlocked(stream);
stream->lock = 0;
return res;
}
void RequestHandler::send(g_fd out, g_ui_transaction_id transaction, uint8_t* data, uint32_t length) {
// lock
g_atomic_lock(&sending_locked);
// write transaction id
uint32_t idlen = sizeof(g_ui_transaction_id);
uint8_t idbytes[idlen];
*((g_ui_transaction_id*) idbytes) = transaction;
g_write(out, idbytes, idlen);
// write length
uint32_t lenlen = sizeof(uint32_t);
uint8_t lenbytes[lenlen];
*((uint32_t*) lenbytes) = length;
g_write(out, lenbytes, lenlen);
// write data
uint32_t written = 0;
while (written < length) {
written += g_write(out, &data[written], length - written);
}
// unlock
sending_locked = false;
}
void RequestHandler::remove_process(g_pid process) {
g_atomic_lock(&process_map_lock);
processMap.erase(process);
process_map_lock = false;
}
void RequestHandler::event_dispatch_thread() {
// register a name
std::stringstream namestr;
namestr << "windowserver:event-dispatcher";
g_task_register_id(namestr.str().c_str());
while (true) {
// wait for events
g_atomic_block(&event_dispatch_events_empty);
// lock
g_atomic_lock(&sending_locked);
// call listener
UIEventDispatchData ldata = event_dispatch_queue.back();
event_dispatch_queue.pop_back();
// write transaction id
uint32_t idlen = sizeof(g_ui_transaction_id);
uint8_t idbytes[idlen];
*((g_ui_transaction_id*) idbytes) = 0;
g_write(ldata.output, idbytes, idlen);
// write length
uint32_t lenlen = sizeof(uint32_t);
uint8_t lenbytes[lenlen];
*((uint32_t*) lenbytes) = ldata.length + 4;
g_write(ldata.output, lenbytes, lenlen);
// write listener id
uint32_t lidlen = sizeof(uint32_t);
uint8_t lidbytes[lidlen];
*((uint32_t*) lidbytes) = ldata.listener;
g_write(ldata.output, lidbytes, lidlen);
// write data
uint32_t written = 0;
while (written < ldata.length) {
written += g_write(ldata.output, &ldata.data[written], ldata.length - written);
}
// delete the data
delete ldata.data;
// check if empty
if (event_dispatch_queue.empty()) {
event_dispatch_events_empty = true;
}
// unlock
sending_locked = false;
}
}
void RequestHandler::add_process(g_pid process, g_fd output, g_fd input) {
g_atomic_lock(&process_map_lock);
UIRegisteredProcessData data;
data.pid = process;
data.output = output;
data.input = input;
processMap.insert(std::make_pair(process, data));
process_map_lock = false;
}
/**
* Sends a message (thread-safe) to the window manager.
*/
g_ui_transaction_id g_ui::send(uint8_t* data, uint32_t length) {
// check if ready
if (!g_ui_ready) {
return -1;
}
static uint8_t sending_locked = false;
// lock
g_atomic_lock(&sending_locked);
// create transaction
g_ui_transaction_id transaction = next_transaction++;
// create data for response
g_ui_transaction_data* response_data = new g_ui_transaction_data;
response_data->data = 0;
response_data->length = 0;
response_data->waiting = true;
// insert to map
if (transaction_map == 0) {
transaction_map = new std::map<g_ui_transaction_id, g_ui_transaction_data*>();
}
transaction_map->insert(std::make_pair(transaction, response_data));
// write transaction id
uint32_t idlen = sizeof(g_ui_transaction_id);
uint8_t idbytes[idlen];
*((g_ui_transaction_id*) idbytes) = transaction;
g_write(g_ui_channel_out, idbytes, idlen);
// write length
uint32_t lenlen = sizeof(uint32_t);
uint8_t lenbytes[lenlen];
*((uint32_t*) lenbytes) = length;
g_write(g_ui_channel_out, lenbytes, lenlen);
// write data
int32_t written = 0;
while (written < length) {
written += g_write(g_ui_channel_out, &data[written], length - written);
}
// unlock
sending_locked = false;
return transaction;
}
uint32_t RequestHandler::nextListenerId() {
static uint8_t locked = false;
static uint32_t next_id = 0;
// lock
g_atomic_lock(&locked);
uint32_t id = next_id++;
// unlock
locked = false;
return id;
}
void RequestHandler::send_event(g_pid process, uint32_t listener_id, uint8_t* data, uint32_t length) {
// lock
g_atomic_lock(&process_map_lock);
if (processMap.count(process) > 0) {
UIRegisteredProcessData& procdat = processMap.at(process);
// add event data to dispatcher queue
UIEventDispatchData event_data;
event_data.output = procdat.output;
event_data.listener = listener_id;
event_data.data = data;
event_data.length = length;
event_dispatch_queue_add(event_data);
}
// unlock
process_map_lock = false;
}
void command_message_responder_thread_t::run() {
event_processor_t* eventProcessor = windowserver_t::instance()->event_processor;
while (true) {
// wait until messages are added
g_atomic_lock(&buffer_empty);
// process all
while (buffer.size() > 0) {
// get reference to response from the queue
command_message_response_t& response = buffer.back();
g_send_message_t(response.target, response.message, response.length, response.transaction);
// delete message buffer
delete (g_message_header*) response.message;
// remove response from queue
buffer.pop_back();
}
}
}
void g_ui::event_dispatch_thread() {
while (true) {
// wait for events
g_atomic_block(&event_dispatch_events_empty);
// lock
g_atomic_lock(&event_dispatch_locked);
// call listener
g_ui_event_dispatch_data& e = event_dispatch_queue.back();
event_dispatch_queue.pop_back();
e.listener->event_received(e.data, e.length);
// check if empty
if (event_dispatch_queue.empty()) {
event_dispatch_events_empty = true;
}
// unlock
event_dispatch_locked = false;
}
}
g_message_transaction g_get_message_tx_id() {
g_atomic_lock((uint8_t*) &__next_transaction_lock);
g_message_transaction next_topic = __next_transaction++;
__next_transaction_lock = false;
return next_topic;
}