free() can handle NULL just fine so skip the check

Fixes #117

spa/plugins/audioconvert/resample-peaks.h

@@ -36,7 +36,6 @@ struct peaks_data {
 
 static void impl_peaks_free(struct resample *r)
 {
-	if (r->data)
 	free(r->data);
 	r->data = NULL;
 }

src/examples/media-session.c

@@ -440,7 +440,6 @@ static void node_proxy_destroy(void *data)
 	}
 	if (n->info)
 		pw_node_info_free(n->info);
-	if (n->media)
 	free(n->media);
 	if (n->session) {
 		spa_list_remove(&n->session_link);

src/modules/module-client-node/client-stream.c

@@ -625,7 +625,6 @@ static int negotiate_buffers(struct impl *impl)
 	spa_buffer_alloc_fill_info(&info, 0, NULL, blocks, datas, aligns);
 	info.skel_size = SPA_ROUND_UP_N(info.skel_size, 16);
 
-	if (impl->buffers)
 	free(impl->buffers);
 	impl->buffers = calloc(buffers, sizeof(struct spa_buffer *) + info.skel_size);
 	if (impl->buffers == NULL)
@@ -1111,12 +1110,9 @@ static void cleanup(struct impl *impl)
 			pw_unload_spa_interface(impl->adapter);
 	}
 
-	if (impl->buffers)
 	free(impl->buffers);
-	if (impl->mem) {
+	if (impl->mem)
 		pw_memblock_free(impl->mem);
-		impl->mem = NULL;
-	}
 	free(impl);
 }
 

src/modules/module-protocol-dbus.c

@@ -216,6 +216,7 @@ static void client_destroy(struct client *this)
 	if (this->sender) {
 		spa_list_remove(&this->link);
 		free(this->sender);
+		this->sender = NULL;
 	}
 }
 

src/pipewire/device.c

@@ -51,11 +51,19 @@ struct pw_device *pw_device_new(struct pw_core *core,
 	struct pw_device *this;
 
 	this = calloc(1, sizeof(*this) + user_data_size);
+	if (this == NULL)
+		return NULL;
+
+	if (properties == NULL)
+		properties = pw_properties_new(NULL, NULL);
+	if (properties == NULL)
+		goto no_mem;
+
 	this->core = core;
 	this->properties = properties;
 
 	this->info.name = strdup(name);
-	this->info.props = properties ? &properties->dict : NULL;
+	this->info.props = &properties->dict;
 	spa_hook_list_init(&this->listener_list);
 
 	spa_list_init(&this->node_list);
@@ -66,6 +74,10 @@ struct pw_device *pw_device_new(struct pw_core *core,
 	pw_log_debug("device %p: new %s", this, name);
 
 	return this;
+
+      no_mem:
+	free(this);
+	return NULL;
 }
 
 void pw_device_destroy(struct pw_device *device)
@@ -85,9 +97,7 @@ void pw_device_destroy(struct pw_device *device)
 		spa_hook_remove(&device->global_listener);
 		pw_global_destroy(device->global);
 	}
-	if (device->info.name)
 	free((char *)device->info.name);
-	if (device->properties)
 	pw_properties_free(device->properties);
 
 	free(device);

src/pipewire/factory.c

@@ -73,7 +73,6 @@ void pw_factory_destroy(struct pw_factory *factory)
 		spa_hook_remove(&factory->global_listener);
 		pw_global_destroy(factory->global);
 	}
-	if (factory->info.name)
 	free((char *)factory->info.name);
 	if (factory->properties)
 		pw_properties_free(factory->properties);

src/pipewire/introspect.c

@@ -135,22 +135,18 @@ struct pw_core_info *pw_core_info_update(struct pw_core_info *info,
 	info->change_mask = update->change_mask;
 
 	if (update->change_mask & PW_CORE_CHANGE_MASK_USER_NAME) {
-		if (info->user_name)
 		free((void *) info->user_name);
 		info->user_name = update->user_name ? strdup(update->user_name) : NULL;
 	}
 	if (update->change_mask & PW_CORE_CHANGE_MASK_HOST_NAME) {
-		if (info->host_name)
 		free((void *) info->host_name);
 		info->host_name = update->host_name ? strdup(update->host_name) : NULL;
 	}
 	if (update->change_mask & PW_CORE_CHANGE_MASK_VERSION) {
-		if (info->version)
 		free((void *) info->version);
 		info->version = update->version ? strdup(update->version) : NULL;
 	}
 	if (update->change_mask & PW_CORE_CHANGE_MASK_NAME) {
-		if (info->name)
 		free((void *) info->name);
 		info->name = update->name ? strdup(update->name) : NULL;
 	}
@@ -166,13 +162,9 @@ struct pw_core_info *pw_core_info_update(struct pw_core_info *info,
 
 void pw_core_info_free(struct pw_core_info *info)
 {
-	if (info->user_name)
 	free((void *) info->user_name);
-	if (info->host_name)
 	free((void *) info->host_name);
-	if (info->version)
 	free((void *) info->version);
-	if (info->name)
 	free((void *) info->name);
 	if (info->props)
 		pw_spa_dict_destroy(info->props);
@@ -195,7 +187,6 @@ struct pw_node_info *pw_node_info_update(struct pw_node_info *info,
 	info->change_mask = update->change_mask;
 
 	if (update->change_mask & PW_NODE_CHANGE_MASK_NAME) {
-		if (info->name)
 		free((void *) info->name);
 		info->name = update->name ? strdup(update->name) : NULL;
 	}
@@ -210,7 +201,6 @@ struct pw_node_info *pw_node_info_update(struct pw_node_info *info,
 
 	if (update->change_mask & PW_NODE_CHANGE_MASK_STATE) {
 		info->state = update->state;
-		if (info->error)
 		free((void *) info->error);
 		info->error = update->error ? strdup(update->error) : NULL;
 	}
@@ -225,9 +215,7 @@ struct pw_node_info *pw_node_info_update(struct pw_node_info *info,
 void pw_node_info_free(struct pw_node_info *info)
 {
 
-	if (info->name)
 	free((void *) info->name);
-	if (info->error)
 	free((void *) info->error);
 	if (info->props)
 		pw_spa_dict_destroy(info->props);
@@ -278,7 +266,6 @@ struct pw_factory_info *pw_factory_info_update(struct pw_factory_info *info,
 			return NULL;
 	}
 	info->id = update->id;
-	if (info->name)
 	free((void *) info->name);
 	info->name = update->name ? strdup(update->name) : NULL;
 	info->type = update->type;
@@ -295,7 +282,6 @@ struct pw_factory_info *pw_factory_info_update(struct pw_factory_info *info,
 
 void pw_factory_info_free(struct pw_factory_info *info)
 {
-	if (info->name)
 	free((void *) info->name);
 	if (info->props)
 		pw_spa_dict_destroy(info->props);
@@ -317,17 +303,14 @@ struct pw_module_info *pw_module_info_update(struct pw_module_info *info,
 	info->change_mask = update->change_mask;
 
 	if (update->change_mask & PW_MODULE_CHANGE_MASK_NAME) {
-		if (info->name)
 		free((void *) info->name);
 		info->name = update->name ? strdup(update->name) : NULL;
 	}
 	if (update->change_mask & PW_MODULE_CHANGE_MASK_FILENAME) {
-		if (info->filename)
 		free((void *) info->filename);
 		info->filename = update->filename ? strdup(update->filename) : NULL;
 	}
 	if (update->change_mask & PW_MODULE_CHANGE_MASK_ARGS) {
-		if (info->args)
 		free((void *) info->args);
 		info->args = update->args ? strdup(update->args) : NULL;
 	}
@@ -341,11 +324,8 @@ struct pw_module_info *pw_module_info_update(struct pw_module_info *info,
 
 void pw_module_info_free(struct pw_module_info *info)
 {
-	if (info->name)
 	free((void *) info->name);
-	if (info->filename)
 	free((void *) info->filename);
-	if (info->args)
 	free((void *) info->args);
 	if (info->props)
 		pw_spa_dict_destroy(info->props);
@@ -365,7 +345,6 @@ struct pw_device_info *pw_device_info_update(struct pw_device_info *info,
 			return NULL;
 	}
 	info->id = update->id;
-	if (info->name)
 	free((void *) info->name);
 	info->name = update->name ? strdup(update->name) : NULL;
 	info->change_mask = update->change_mask;
@@ -380,7 +359,6 @@ struct pw_device_info *pw_device_info_update(struct pw_device_info *info,
 
 void pw_device_info_free(struct pw_device_info *info)
 {
-	if (info->name)
 	free((void *) info->name);
 	if (info->props)
 		pw_spa_dict_destroy(info->props);
@@ -440,12 +418,10 @@ struct pw_link_info *pw_link_info_update(struct pw_link_info *info,
 	}
 	if (update->change_mask & PW_LINK_CHANGE_MASK_STATE) {
 		info->state = update->state;
-		if (info->error)
 		free((void *) info->error);
 		info->error = update->error ? strdup(update->error) : NULL;
 	}
 	if (update->change_mask & PW_LINK_CHANGE_MASK_FORMAT) {
-		if (info->format)
 		free(info->format);
 		info->format = pw_spa_pod_copy(update->format);
 	}
@@ -459,9 +435,7 @@ struct pw_link_info *pw_link_info_update(struct pw_link_info *info,
 
 void pw_link_info_free(struct pw_link_info *info)
 {
-	if (info->error)
 	free((void *) info->error);
-	if (info->format)
 	free(info->format);
 	if (info->props)
 		pw_spa_dict_destroy(info->props);

src/pipewire/link.c

@@ -110,7 +110,6 @@ static void pw_link_update_state(struct pw_link *link, enum pw_link_state state,
 	}
 
 	link->info.state = state;
-	if (link->info.error)
 	free((char*)link->info.error);
 	link->info.error = error;
 
@@ -312,7 +311,6 @@ static int do_negotiate(struct pw_link *this, uint32_t in_state, uint32_t out_st
 		}
 	}
 
-	if (this->info.format)
 	free(this->info.format);
 	this->info.format = format;
 
@@ -332,7 +330,6 @@ static int do_negotiate(struct pw_link *this, uint32_t in_state, uint32_t out_st
 
       error:
 	pw_link_update_state(this, PW_LINK_STATE_ERROR, error);
-	if (format)
 	free(format);
 	return res;
 }
@@ -1515,9 +1512,7 @@ void pw_link_destroy(struct pw_link *link)
 	if (link->properties)
 		pw_properties_free(link->properties);
 
-	if (link->info.format)
 	free(link->info.format);
-
 	free(impl);
 }
 

src/pipewire/module.c

@@ -303,11 +303,8 @@ void pw_module_destroy(struct pw_module *module)
 		pw_global_destroy(module->global);
 	}
 
-	if (module->info.name)
 	free((char *) module->info.name);
-	if (module->info.filename)
 	free((char *) module->info.filename);
-	if (module->info.args)
 	free((char *) module->info.args);
 
 	pw_properties_free(module->properties);

src/pipewire/node.c

@@ -175,7 +175,6 @@ static void node_update_state(struct pw_node *node, enum pw_node_state state, ch
 		     pw_node_state_as_string(old), pw_node_state_as_string(state));
 	}
 
-	if (node->info.error)
 	free((char*)node->info.error);
 	node->info.error = error;
 	node->info.state = state;

src/pipewire/remote.c

@@ -140,7 +140,6 @@ pw_remote_update_state(struct pw_remote *remote, enum pw_remote_state state, con
 	enum pw_remote_state old = remote->state;
 
 	if (old != state) {
-		if (remote->error)
 		free(remote->error);
 
 		if (fmt) {
@@ -318,7 +317,6 @@ void pw_remote_destroy(struct pw_remote *remote)
 	pw_map_clear(&remote->objects);
 
 	pw_log_debug("remote %p: free", remote);
-	if (remote->properties)
 	pw_properties_free(remote->properties);
 	free(remote->error);
 	free(impl);

src/pipewire/stream.c

@@ -212,7 +212,6 @@ static bool stream_set_state(struct pw_stream *stream, enum pw_stream_state stat
 	enum pw_stream_state old = stream->state;
 	bool res = old != state;
 	if (res) {
-		if (stream->error)
 		free(stream->error);
 		stream->error = error ? strdup(error) : NULL;
 
@@ -995,12 +994,10 @@ void pw_stream_destroy(struct pw_stream *stream)
 	clear_params(stream, PARAM_TYPE_INIT | PARAM_TYPE_OTHER | PARAM_TYPE_FORMAT);
 	pw_array_clear(&impl->params);
 
-	if (stream->error)
 	free(stream->error);
 
 	pw_properties_free(stream->properties);
 
-	if (stream->name)
 	free(stream->name);
 
 	if (impl->free_data)