X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=std.c;h=5bea8985604914314d0a9cfd46e2bda8b405a87d;hb=7ab89f4827d516313cafc9b7b9670ee99dc9c584;hp=f3519a1df805ea86f0e96b9c3861f0931248ba3f;hpb=49f00e13f72d11a9cac8523e0c1506dde138f218;p=libsigrok.git

diff --git a/std.c b/std.c
index f3519a1d..5bea8985 100644
--- a/std.c
+++ b/std.c
@@ -1,5 +1,5 @@
 /*
- * This file is part of the sigrok project.
+ * This file is part of the libsigrok project.
  *
  * Copyright (C) 2013 Uwe Hermann <uwe@hermann-uwe.de>
  *
@@ -47,12 +47,13 @@ SR_PRIV int std_hw_init(struct sr_context *sr_ctx, struct sr_dev_driver *di,
 		return SR_ERR_ARG;
 	}
 
-	if (!(drvc = g_try_malloc0(sizeof(struct drv_context)))) {
+	if (!(drvc = g_try_malloc(sizeof(struct drv_context)))) {
 		sr_err("%sDriver context malloc failed.", prefix);
 		return SR_ERR_MALLOC;
 	}
 
 	drvc->sr_ctx = sr_ctx;
+	drvc->instances = NULL;
 	di->priv = drvc;
 
 	return SR_OK;
@@ -171,39 +172,46 @@ SR_PRIV int std_hw_dev_acquisition_stop_serial(struct sr_dev_inst *sdi,
  * there cannot be freed.
  *
  * @param driver The driver which will have its instances released.
+ * @param clear_private If not NULL, this points to a function called
+ * with sdi->priv as argument. The function can then clear any device
+ * instance-specific resources kept there. It must also clear the struct
+ * pointed to by sdi->priv.
  *
  * @return SR_OK on success.
  */
-SR_PRIV int std_dev_clear(const struct sr_dev_driver *driver)
+SR_PRIV int std_dev_clear(const struct sr_dev_driver *driver,
+		std_dev_clear_t clear_private)
 {
-	struct sr_dev_inst *sdi;
 	struct drv_context *drvc;
-	struct dev_context *devc;
+	struct sr_dev_inst *sdi;
 	GSList *l;
 	int ret;
 
-	drvc = driver->priv;
+	if (!(drvc = driver->priv))
+		/* Driver was never initialized, nothing to do. */
+		return SR_OK;
+
 	ret = SR_OK;
 	for (l = drvc->instances; l; l = l->next) {
-		/* Log errors, but continue cleaning up the rest. */
 		if (!(sdi = l->data)) {
 			ret = SR_ERR_BUG;
 			continue;
 		}
-		if (!(devc = sdi->priv)) {
-			ret = SR_ERR_BUG;
-			continue;
-		}
 		if (driver->dev_close)
 			driver->dev_close(sdi);
 
 		if (sdi->conn) {
-			if (sdi->inst_type == SR_INST_USB)
-				sr_usb_dev_inst_free(sdi->conn);
-			else if (sdi->inst_type == SR_INST_SERIAL)
+			 if (sdi->inst_type == SR_INST_SERIAL)
 				sr_serial_dev_inst_free(sdi->conn);
+#if HAVE_LIBUSB_1_0
+			else if (sdi->inst_type == SR_INST_USB)
+				sr_usb_dev_inst_free(sdi->conn);
+#endif
 		}
-		sdi = l->data;
+		if (clear_private)
+			clear_private(sdi->priv);
+		else
+			g_free(sdi->priv);
 		sr_dev_inst_free(sdi);
 	}