clang-tidy modernize-use-nullptr

src/platforms/posix/drivers/accelsim/accelsim.cpp

@@ -388,7 +388,7 @@ ACCELSIM::transfer(uint8_t *send, uint8_t *recv, unsigned len)
 		// Get data from the simulator
 		Simulator *sim = Simulator::getInstance();
 
-		if (sim == NULL) {
+		if (sim == nullptr) {
 			return ENODEV;
 		}
 
@@ -1159,7 +1159,7 @@ accelsim_main(int argc, char *argv[])
 	enum Rotation rotation = ROTATION_NONE;
 	int ret;
 	int myoptind = 1;
-	const char *myoptarg = NULL;
+	const char *myoptarg = nullptr;
 
 	/* jump over start/off/etc and look at options first */
 	while ((ch = px4_getopt(argc, argv, "R:", &myoptind, &myoptarg)) != EOF) {

src/platforms/posix/drivers/airspeedsim/airspeedsim.cpp

@@ -425,7 +425,7 @@ AirspeedSim::transfer(const uint8_t *send, unsigned send_len, uint8_t *recv, uns
 		// this is equivalent to the collect phase
 		Simulator *sim = Simulator::getInstance();
 
-		if (sim == NULL) {
+		if (sim == nullptr) {
 			PX4_ERR("Error BARO_SIM::transfer no simulator");
 			return -ENODEV;
 		}

src/platforms/posix/drivers/barosim/baro.cpp

@@ -620,7 +620,7 @@ BAROSIM::transfer(const uint8_t *send, unsigned send_len, uint8_t *recv, unsigne
 		/* read requested */
 		Simulator *sim = Simulator::getInstance();
 
-		if (sim == NULL) {
+		if (sim == nullptr) {
 			PX4_ERR("Error BAROSIM_DEV::transfer no simulator");
 			return -ENODEV;
 		}
@@ -785,7 +785,7 @@ start()
 
 	if (g_barosim != nullptr && OK != g_barosim->init()) {
 		delete g_barosim;
-		g_barosim = NULL;
+		g_barosim = nullptr;
 		PX4_ERR("bus init failed");
 		return false;
 	}

src/platforms/posix/drivers/rgbledsim/rgbled.cpp

@@ -641,16 +641,16 @@ rgbledsim_main(int argc, char *argv[])
 
 	/* jump over start/off/etc and look at options first */
 	int myoptind = 1;
-	const char *myoptarg = NULL;
+	const char *myoptarg = nullptr;
 
 	while ((ch = px4_getopt(argc, argv, "a:b:", &myoptind, &myoptarg)) != EOF) {
 		switch (ch) {
 		case 'a':
-			rgbledadr = strtol(myoptarg, NULL, 0);
+			rgbledadr = strtol(myoptarg, nullptr, 0);
 			break;
 
 		case 'b':
-			i2cdevice = strtol(myoptarg, NULL, 0);
+			i2cdevice = strtol(myoptarg, nullptr, 0);
 			break;
 
 		default:
@@ -783,9 +783,9 @@ rgbledsim_main(int argc, char *argv[])
 		}
 
 		rgbled_rgbset_t v;
-		v.red   = strtol(argv[2], NULL, 0);
-		v.green = strtol(argv[3], NULL, 0);
-		v.blue  = strtol(argv[4], NULL, 0);
+		v.red   = strtol(argv[2], nullptr, 0);
+		v.green = strtol(argv[3], nullptr, 0);
+		v.blue  = strtol(argv[4], nullptr, 0);
 		ret = h.ioctl(RGBLED_SET_RGB, (unsigned long)&v);
 		ret = h.ioctl(RGBLED_SET_MODE, (unsigned long)RGBLED_MODE_ON);
 		DevMgr::releaseHandle(h);

src/platforms/posix/main.cpp

@@ -159,7 +159,7 @@ static int mkpath(const char *path, mode_t mode)
 	status = 0;
 	pp = copypath;
 
-	while (status == 0 && (sp = strchr(pp, '/')) != 0) {
+	while (status == 0 && (sp = strchr(pp, '/')) != nullptr) {
 		if (sp != pp) {
 			/* Neither root nor double slash in path */
 			*sp = '\0';
@@ -214,7 +214,7 @@ static void run_cmd(const vector<string> &appargs, bool exit_on_fail, bool silen
 			++i;
 		}
 
-		arg[i] = (char *)0;
+		arg[i] = (char *)nullptr;
 
 		int retval = apps[command](i, (char **)arg);
 
@@ -310,9 +310,9 @@ int main(int argc, char **argv)
 	sig_fpe.sa_handler = _SigFpeHandler;
 	sig_fpe.sa_flags = 0;// not SA_RESTART!;
 
-	sigaction(SIGINT, &sig_int, NULL);
+	sigaction(SIGINT, &sig_int, nullptr);
 	//sigaction(SIGTERM, &sig_int, NULL);
-	sigaction(SIGFPE, &sig_fpe, NULL);
+	sigaction(SIGFPE, &sig_fpe, nullptr);
 
 	set_cpu_scaling();
 
@@ -514,7 +514,7 @@ int main(int argc, char **argv)
 		term.c_lflag &= ~ICANON;
 		term.c_lflag &= ~ECHO;
 		tcsetattr(0, TCSANOW, &term);
-		setbuf(stdin, NULL);
+		setbuf(stdin, nullptr);
 
 		while (!_ExitFlag) {
 

src/platforms/posix/px4_layer/px4_posix_tasks.cpp

@@ -108,7 +108,7 @@ static void *entry_adapter(void *ptr)
 	px4_task_exit(0);
 	PX4_DEBUG("After px4_task_exit");
 
-	return NULL;
+	return nullptr;
 }
 
 void
@@ -134,10 +134,10 @@ px4_task_t px4_task_spawn_cmd(const char *name, int scheduler, int priority, int
 	struct sched_param param = {};
 
 	// Calculate argc
-	while (p != (char *)0) {
+	while (p != (char *)nullptr) {
 		p = argv[argc];
 
-		if (p == (char *)0) {
+		if (p == (char *)nullptr) {
 			break;
 		}
 
@@ -165,7 +165,7 @@ px4_task_t px4_task_spawn_cmd(const char *name, int scheduler, int priority, int
 	}
 
 	// Must add NULL at end of argv
-	taskdata->argv[argc] = (char *)0;
+	taskdata->argv[argc] = (char *)nullptr;
 
 	PX4_DEBUG("starting task %s", name);
 
@@ -249,7 +249,7 @@ px4_task_t px4_task_spawn_cmd(const char *name, int scheduler, int priority, int
 
 		if (rv == EPERM) {
 			//printf("WARNING: NOT RUNING AS ROOT, UNABLE TO RUN REALTIME THREADS\n");
-			rv = pthread_create(&taskmap[taskid].pid, NULL, &entry_adapter, (void *) taskdata);
+			rv = pthread_create(&taskmap[taskid].pid, nullptr, &entry_adapter, (void *) taskdata);
 
 			if (rv != 0) {
 				PX4_ERR("px4_task_spawn_cmd: failed to create thread %d %d\n", rv, errno);
@@ -293,7 +293,7 @@ int px4_task_delete(px4_task_t id)
 	if (pthread_self() == pid) {
 		taskmap[id].isused = false;
 		pthread_mutex_unlock(&task_mutex);
-		pthread_exit(0);
+		pthread_exit(nullptr);
 
 	} else {
 		rv = pthread_cancel(pid);