Changeset 6028ec8 in mainline for uspace/lib/usb/src/debug.c

Timestamp:

2011-02-01T11:28:09Z (13 years ago)

Author:

Vojtech Horky <vojtechhorky@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

0b31409

Parents:

632ed68

Message:

Add generic logging functions

See ticket #52.

File:

• uspace/lib/usb/src/debug.c (modified) (3 diffs)

uspace/lib/usb/src/debug.c

@@ -1 +1 @@
 /*
- * Copyright (c) 2010 Vojtech Horky
+ * Copyright (c) 2010-2011 Vojtech Horky
  * All rights reserved.
  *
@@ -61 +61 @@
 static FIBRIL_MUTEX_INITIALIZE(tag_list_guard);
 
+/** Level of logging messages. */
+static usb_log_level_t log_level = USB_LOG_LEVEL_WARNING;
+/** Prefix for logging messages. */
+static const char *log_prefix = "usb";
+/** Serialization mutex for logging functions. */
+static FIBRIL_MUTEX_INITIALIZE(log_serializer);
+
 /** Find or create new tag with given name.
  *
@@ -155 +162 @@
 }
 
+/** Enable logging.
+ *
+ * @param level Maximal enabled level (including this one).
+ * @param message_prefix Prefix for each printed message.
+ */
+void usb_log_enable(usb_log_level_t level, const char *message_prefix)
+{
+        log_prefix = message_prefix;
+        log_level = level;
+}
+
+
+static const char *log_level_name(usb_log_level_t level)
+{
+        switch (level) {
+                case USB_LOG_LEVEL_FATAL:
+                        return " FATAL";
+                case USB_LOG_LEVEL_ERROR:
+                        return " ERROR";
+                case USB_LOG_LEVEL_WARNING:
+                        return " WARN";
+                case USB_LOG_LEVEL_INFO:
+                        return " info";
+                default:
+                        return "";
+        }
+}
+
+/** Print logging message.
+ *
+ * @param level Verbosity level of the message.
+ * @param format Formatting directive.
+ */
+void usb_log_printf(usb_log_level_t level, const char *format, ...)
+{
+        if (level > log_level) {
+                return;
+        }
+
+        FILE *stream = NULL;
+        switch (level) {
+                case USB_LOG_LEVEL_FATAL:
+                case USB_LOG_LEVEL_ERROR:
+                        stream = stderr;
+                        break;
+                default:
+                        stream = stdout;
+                        break;
+        }
+        assert(stream != NULL);
+
+        va_list args;
+        va_start(args, format);
+
+        fibril_mutex_lock(&log_serializer);
+        fprintf(stream, "[%s]%s: ", log_prefix, log_level_name(level));
+        vfprintf(stream, format, args);
+        fibril_mutex_unlock(&log_serializer);
+
+        va_end(args);
+}
 
 /**