X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=hardware%2Fcommon%2Fusb.c;h=6e678fdb401d1d681000fc3a6e273c7374656957;hb=fa0d6afe19c3a545f3f940933ed079966525d142;hp=bac420b31c31c758594af37ddf1aca78393f26b4;hpb=29a27196a13de2ffd9b671185e4b464b9db9b549;p=libsigrok.git

diff --git a/hardware/common/usb.c b/hardware/common/usb.c
index bac420b3..6e678fdb 100644
--- a/hardware/common/usb.c
+++ b/hardware/common/usb.c
@@ -33,14 +33,7 @@
 #define SUBCLASS_USBTMC 0x03
 #define USBTMC_USB488   0x01
 
-/* Message logging helpers with subsystem-specific prefix string. */
-#define LOG_PREFIX "usb: "
-#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)
+#define LOG_PREFIX "usb"
 
 /**
  * Find USB devices according to a connection string.
@@ -243,3 +236,95 @@ SR_PRIV int sr_usb_open(libusb_context *usb_ctx, struct sr_usb_dev_inst *usb)
 
 	return ret;
 }
+
+#ifdef _WIN32
+SR_PRIV gpointer usb_thread(gpointer data)
+{
+	struct sr_context *ctx = data;
+
+	while (ctx->usb_thread_running) {
+		g_mutex_lock(&ctx->usb_mutex);
+		libusb_wait_for_event(ctx->libusb_ctx, NULL);
+		SetEvent(ctx->usb_event);
+		g_mutex_unlock(&ctx->usb_mutex);
+		g_thread_yield();
+	}
+
+	return NULL;
+}
+
+SR_PRIV int usb_callback(int fd, int revents, void *cb_data)
+{
+	struct sr_context *ctx = cb_data;
+	int ret;
+
+	g_mutex_lock(&ctx->usb_mutex);
+	ret = ctx->usb_cb(fd, revents, ctx->usb_cb_data);
+
+	if (ctx->usb_thread_running) {
+		ResetEvent(ctx->usb_event);
+		g_mutex_unlock(&ctx->usb_mutex);
+	}
+
+	return ret;
+}
+#endif
+
+SR_PRIV int usb_source_add(struct sr_context *ctx, int timeout,
+		sr_receive_data_callback_t cb, void *cb_data)
+{
+	if (ctx->usb_source_present) {
+		sr_err("A USB event source is already present.");
+		return SR_ERR;
+	}
+
+#ifdef _WIN32
+	ctx->usb_event = CreateEvent(NULL, TRUE, FALSE, NULL);
+	g_mutex_init(&ctx->usb_mutex);
+	ctx->usb_thread_running = TRUE;
+	ctx->usb_thread = g_thread_new("usb", usb_thread, ctx);
+	ctx->usb_pollfd.fd = ctx->usb_event;
+	ctx->usb_pollfd.events = G_IO_IN;
+	ctx->usb_cb = cb;
+	ctx->usb_cb_data = cb_data;
+	sr_session_source_add_pollfd(&ctx->usb_pollfd, timeout, usb_callback, ctx);
+#else
+	const struct libusb_pollfd **lupfd;
+	unsigned int i;
+
+	lupfd = libusb_get_pollfds(ctx->libusb_ctx);
+	for (i = 0; lupfd[i]; i++)
+		sr_source_add(lupfd[i]->fd, lupfd[i]->events, timeout, cb, cb_data);
+	free(lupfd);
+#endif
+	ctx->usb_source_present = TRUE;
+
+	return SR_OK;
+}
+
+SR_PRIV int usb_source_remove(struct sr_context *ctx)
+{
+	if (!ctx->usb_source_present)
+		return SR_OK;
+
+#ifdef _WIN32
+	ctx->usb_thread_running = FALSE;
+	g_mutex_unlock(&ctx->usb_mutex);
+	libusb_unlock_events(ctx->libusb_ctx);
+	g_thread_join(ctx->usb_thread);
+	g_mutex_clear(&ctx->usb_mutex);
+	sr_session_source_remove_pollfd(&ctx->usb_pollfd);
+	CloseHandle(ctx->usb_event);
+#else
+	const struct libusb_pollfd **lupfd;
+	unsigned int i;
+
+	lupfd = libusb_get_pollfds(ctx->libusb_ctx);
+	for (i = 0; lupfd[i]; i++)
+		sr_source_remove(lupfd[i]->fd);
+	free(lupfd);
+#endif
+	ctx->usb_source_present = FALSE;
+
+	return SR_OK;
+}