obj: unify description with implementation pmemobj_log* fun

src/include/libpmemobj/log.h

@@ -20,11 +20,14 @@ extern "C" {
 enum pmemobj_log_level {
 	/* only basic library info */
 	PMEMOBJ_LOG_LEVEL_HARK,
-	/* an error that causes the library to stop working immediately */
+	/* an error that causes the program to stop working immediately */
 	PMEMOBJ_LOG_LEVEL_FATAL,
-	/* an error that causes the library to stop working properly */
+	/* an error that causes the current operation or transaction to fail */
 	PMEMOBJ_LOG_LEVEL_ERROR,
-	/* an errors that could be handled in the upper level */
+	/*
+	 * an unexpected situation that does NOT cause
+	 * the current operation to fail
+	 */
 	PMEMOBJ_LOG_LEVEL_WARNING,
 	/* non-massive info mainly related to public API function completions */
 	PMEMOBJ_LOG_LEVEL_NOTICE,
@@ -36,8 +39,9 @@ enum pmemobj_log_level {
 
 enum pmemobj_log_threshold {
 	/*
-	 * the main threshold level - the logging messages above this level
-	 * won't trigger the logging functions
+	 * the main threshold level - the logging messages less severe than
+	 * indicated by this threshold's value won't trigger the logging
+	 * functions
 	 */
 	PMEMOBJ_LOG_THRESHOLD,
 	/*

src/libpmemobj/obj_log.c

@@ -10,26 +10,26 @@
 #include "util.h"
 
 /*
- * pmemobj_log_set_threshold -- set the log level threshold
+ * pmemobj_log_set_threshold -- set the logging threshold value
  */
 int
 pmemobj_log_set_threshold(enum pmemobj_log_threshold threshold,
-	enum pmemobj_log_level level)
+	enum pmemobj_log_level value)
 {
 	int ret = core_log_set_threshold((enum core_log_threshold)threshold,
-		(enum core_log_level)level);
+		(enum core_log_level)value);
 	return core_log_error_translate(ret);
 }
 
 /*
- * pmemobj_log_get_threshold -- get the log level threshold
+ * pmemobj_log_get_threshold -- get the logging value threshold value
  */
 int
 pmemobj_log_get_threshold(enum pmemobj_log_threshold threshold,
-	enum pmemobj_log_level *level)
+	enum pmemobj_log_level *value)
 {
 	int ret = core_log_get_threshold((enum core_log_threshold)threshold,
-		(enum core_log_level *)level);
+		(enum core_log_level *)value);
 	return core_log_error_translate(ret);
 }