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message-queue.cpp
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message-queue.cpp
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#include <queue>
#include <string>
#include <vector>
#include "r-tech1/message-queue.h"
#include "r-tech1/thread.h"
using std::vector;
using std::string;
Util::Thread::Lock MessageQueue::messageLock;
MessageQueue::MessageQueue(){
Util::Thread::initializeLock(&lock);
}
void MessageQueue::add(const std::string & str){
Util::Thread::acquireLock(&lock);
messages.push(str);
Util::Thread::releaseLock(&lock);
}
bool MessageQueue::hasAny(){
bool any = false;
Util::Thread::acquireLock(&lock);
any = messages.size() > 0;
Util::Thread::releaseLock(&lock);
return any;
}
std::string MessageQueue::get(){
std::string str;
Util::Thread::acquireLock(&lock);
if (messages.size() > 0){
str = messages.front();
messages.pop();
}
Util::Thread::releaseLock(&lock);
return str;
}
MessageQueue::~MessageQueue(){
}
static vector<string> messageBuffer;
/* should support infinite queues eventually */
static MessageQueue * current = NULL;
void MessageQueue::registerInfo(MessageQueue * queue){
Util::Thread::acquireLock(&messageLock);
current = queue;
if (current != NULL){
/* push all saved messages immediately to the queue */
for (vector<string>::iterator it = messageBuffer.begin(); it != messageBuffer.end(); it++){
current->add(*it);
}
messageBuffer.clear();
}
Util::Thread::releaseLock(&messageLock);
}
/* clear any buffered messages */
void MessageQueue::clearInfo(){
Util::Thread::acquireLock(&messageLock);
messageBuffer.clear();
Util::Thread::releaseLock(&messageLock);
}
void MessageQueue::unregisterInfo(MessageQueue * queue){
Util::Thread::acquireLock(&messageLock);
if (current == queue){
current = NULL;
}
Util::Thread::releaseLock(&messageLock);
}
void MessageQueue::info(const std::string & str){
Util::Thread::acquireLock(&messageLock);
if (current != NULL){
current->add(str);
} else {
/* save it for later until a message-queue is registered */
messageBuffer.push_back(str);
}
Util::Thread::releaseLock(&messageLock);
}

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message-queue.cpp (2 KB)

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