X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=hardware%2Fdemo%2Fdemo.c;h=98c95457ce49259b827e6607bc1f8b9d1c127502;hb=refs%2Ftags%2Fdsupstream;hp=1619be24c9e2d927910379c9ccf9948c5b21f6af;hpb=50985c2019b2b5a6ce394589d89ee925b4f5e3a9;p=libsigrok.git

diff --git a/hardware/demo/demo.c b/hardware/demo/demo.c
index 1619be24..98c95457 100644
--- a/hardware/demo/demo.c
+++ b/hardware/demo/demo.c
@@ -31,14 +31,14 @@
 #include "libsigrok.h"
 #include "libsigrok-internal.h"
 
-/* Message logging helpers with driver-specific prefix string. */
-#define DRIVER_LOG_DOMAIN "demo: "
-#define sr_log(l, s, args...) sr_log(l, DRIVER_LOG_DOMAIN s, ## args)
-#define sr_spew(s, args...) sr_spew(DRIVER_LOG_DOMAIN s, ## args)
-#define sr_dbg(s, args...) sr_dbg(DRIVER_LOG_DOMAIN s, ## args)
-#define sr_info(s, args...) sr_info(DRIVER_LOG_DOMAIN s, ## args)
-#define sr_warn(s, args...) sr_warn(DRIVER_LOG_DOMAIN s, ## args)
-#define sr_err(s, args...) sr_err(DRIVER_LOG_DOMAIN s, ## args)
+/* Message logging helpers with subsystem-specific prefix string. */
+#define LOG_PREFIX "demo: "
+#define sr_log(l, s, args...) sr_log(l, LOG_PREFIX s, ## args)
+#define sr_spew(s, args...) sr_spew(LOG_PREFIX s, ## args)
+#define sr_dbg(s, args...) sr_dbg(LOG_PREFIX s, ## args)
+#define sr_info(s, args...) sr_info(LOG_PREFIX s, ## args)
+#define sr_warn(s, args...) sr_warn(LOG_PREFIX s, ## args)
+#define sr_err(s, args...) sr_err(LOG_PREFIX s, ## args)
 
 /* TODO: Number of probes should be configurable. */
 #define NUM_PROBES             8
@@ -152,7 +152,7 @@ static int clear_instances(void)
 
 static int hw_init(struct sr_context *sr_ctx)
 {
-	return std_hw_init(sr_ctx, di, DRIVER_LOG_DOMAIN);
+	return std_hw_init(sr_ctx, di, LOG_PREFIX);
 }
 
 static GSList *hw_scan(GSList *options)
@@ -212,7 +212,7 @@ static int hw_dev_open(struct sr_dev_inst *sdi)
 {
 	(void)sdi;
 
-	/* Nothing needed so far. */
+	sdi->status = SR_ST_ACTIVE;
 
 	return SR_OK;
 }
@@ -221,7 +221,7 @@ static int hw_dev_close(struct sr_dev_inst *sdi)
 {
 	(void)sdi;
 
-	/* Nothing needed so far. */
+    sdi->status = SR_ST_INACTIVE;
 
 	return SR_OK;
 }
@@ -299,6 +299,9 @@ static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi)
 
 	struct dev_context *const devc = sdi->priv;
 
+	if (sdi->status != SR_ST_ACTIVE)
+		return SR_ERR_DEV_CLOSED;
+
 	if (id == SR_CONF_SAMPLERATE) {
 		devc->cur_samplerate = g_variant_get_uint64(data);
 		sr_dbg("%s: setting samplerate to %" PRIu64, __func__,
@@ -460,6 +463,9 @@ static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
 {
 	struct dev_context *const devc = sdi->priv;
 
+	if (sdi->status != SR_ST_ACTIVE)
+		return SR_ERR_DEV_CLOSED;
+
 	devc->cb_data = cb_data;
 	devc->samples_counter = 0;
 
@@ -490,7 +496,7 @@ static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
 		    40, receive_data, devc);
 
 	/* Send header packet to the session bus. */
-	std_session_send_df_header(cb_data, DRIVER_LOG_DOMAIN);
+	std_session_send_df_header(cb_data, LOG_PREFIX);
 
 	/* We use this timestamp to decide how many more samples to send. */
 	devc->starttime = g_get_monotonic_time();