moved to shstk

libs/application/qsingleapplication.cpp

@@ -0,0 +1,87 @@
+#include <QDebug>
+#include "qsingleapplication.h"
+
+
+#define QSA_SHMSIZE 4096
+#define QSA_MSGSIZE (QSA_SHMSIZE - sizeof(quint32) - sizeof(quint32))
+
+
+QSingleApplication::QSingleApplication(const QString & app_name): QThread() {
+	shm.setKey(app_name);
+	exiting = false;
+	first = !shm.attach();
+	if (!first) {
+		shm.detach();
+		first = !shm.attach();
+		if (!first)
+			return;
+	}
+	shm.create(QSA_SHMSIZE);
+	shm.attach();
+	shm.lock();
+	void * d = shm.data();
+	if (d) memset(d, 0, sizeof(quint32));
+	shm.unlock();
+	start();
+	//qDebug() << "start listen";
+}
+
+
+QSingleApplication::~QSingleApplication() {
+	if (first) {
+		exiting = true;
+		quit();
+		if (!wait(100))
+			terminate();
+	}
+	if (shm.isAttached()) shm.detach();
+}
+
+
+void QSingleApplication::sendMessage(const QByteArray & m) {
+	//qDebug() << "send message" << first << shm.isAttached();
+	if (first || !shm.isAttached()) return;
+	if (m.size() > int(QSA_MSGSIZE)) {
+		qDebug() << "[QSingleApplication] Too large message:" << m.size() << ">" << QSA_MSGSIZE;
+		return;
+	}
+	shm.lock();
+	quint32 num(0), size = m.size();
+	void * d = shm.data();
+	if (d) {
+		memcpy(&num, d, sizeof(quint32));
+		num++;
+		memcpy(d, &num, sizeof(quint32));
+		memcpy((((char*)d) + sizeof(quint32)), &size, sizeof(quint32));
+		memcpy((((char*)d) + sizeof(quint32) + sizeof(quint32)), m.constData(), size);
+	}
+	shm.unlock();
+}
+
+
+void QSingleApplication::run() {
+	quint32 num(0), pnum(0), size(0);
+	while (!exiting) {
+		shm.lock();
+		const void * d = shm.constData();
+		if (d) {
+			memcpy(&num, d, sizeof(quint32));
+			if (pnum != num) {
+				pnum = num;
+				//qDebug() << "new message" << num;
+				memcpy(&size, (((const char*)d) + sizeof(quint32)), sizeof(quint32));
+				if (size <= int(QSA_MSGSIZE)) {
+					QByteArray msg;
+					msg.resize(size);
+					memcpy(msg.data(), (((const char*)d) + sizeof(quint32) + sizeof(quint32)), size);
+					emit messageReceived(msg);
+				} else {
+					qDebug() << "[QSingleApplication] Invalid message size:" << size;
+				}
+			}
+		}
+		shm.unlock();
+		if (exiting) break;
+		msleep(10);
+	}
+}