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From:   Luiz Augusto von Dentz <luiz.dentz@gmail.com>
To:     linux-bluetooth@vger.kernel.org
Subject: [PATCH BlueZ v2 1/9] log: Introduce DBG_IS_ENABLED
Date:   Wed, 23 Mar 2022 13:13:33 -0700
Message-Id: <20220323201341.3596128-2-luiz.dentz@gmail.com>
In-Reply-To: <20220323201341.3596128-1-luiz.dentz@gmail.com>
References: <20220323201341.3596128-1-luiz.dentz@gmail.com>
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From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>

This introduces DBG_IS_ENABLE macro which can be used to check if
BTD_DEBUG_FLAG_PRINT has been enabled for the current file.
---
 src/log.c | 12 ++++++++++++
 src/log.h | 11 +++++++++++
 2 files changed, 23 insertions(+)

diff --git a/src/log.c b/src/log.c
index 0155a6bba..1157859ef 100644
--- a/src/log.c
+++ b/src/log.c
@@ -179,6 +179,18 @@ void __btd_log_init(const char *debug, int detach)
 	info("Bluetooth daemon %s", VERSION);
 }
 
+bool __btd_log_is_enabled(const char *file)
+{
+	struct btd_debug_desc *desc;
+
+	for (desc = __start___debug; desc < __stop___debug; desc++) {
+		if (desc->file && g_pattern_match_simple(file, desc->file))
+			return desc->flags & BTD_DEBUG_FLAG_PRINT;
+	}
+
+	return false;
+}
+
 void __btd_log_cleanup(void)
 {
 	closelog();
diff --git a/src/log.h b/src/log.h
index 74941beb2..e35238870 100644
--- a/src/log.h
+++ b/src/log.h
@@ -9,6 +9,7 @@
  */
 
 #include <stdint.h>
+#include <stdbool.h>
 
 void info(const char *format, ...) __attribute__((format(printf, 1, 2)));
 
@@ -27,6 +28,7 @@ void btd_debug(uint16_t index, const char *format, ...)
 void __btd_log_init(const char *debug, int detach);
 void __btd_log_cleanup(void);
 void __btd_toggle_debug(void);
+bool __btd_log_is_enabled(const char *file);
 
 struct btd_debug_desc {
 	const char *file;
@@ -38,6 +40,15 @@ struct btd_debug_desc {
 void __btd_enable_debug(struct btd_debug_desc *start,
 					struct btd_debug_desc *stop);
 
+/* DBG_IS_ENABLED:
+ *
+ * Simple macro that can be used to check if debug has been enabled for the
+ * __FILE__.
+ * Note: This does a lookup thus why it was not used by the likes of
+ * DBG/DBG_IDX which loads it directly from section("__debug").
+ */
+#define DBG_IS_ENABLED() __btd_log_is_enabled(__FILE__)
+
 /**
  * DBG:
  * @fmt: format string
-- 
2.35.1