[#BloombergLP-bsls-Log]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bsls.adoc[bsls]::Log
:relfileprefix: ../../
:mrdocs:

This class provides a namespace for low‐level logging utilities.

== Synopsis

Declared in `<bsls_log.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
class Log;
----

== Description

This class serves as a namespace containing a suite of utility functions that allow low‐level code to write log messages to a configurable, globally controlled destination.

== Type Aliases

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/bsls/Log/LogMessageHandler-05.adoc[`LogMessageHandler`] 
| Callback type invoked to handle log messages.
|===


== Static Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/bsls/Log/logFormattedMessage.adoc[`logFormattedMessage`] 
| Log a formatted message if its severity meets the threshold.
| xref:BloombergLP/bsls/Log/logMessage.adoc[`logMessage`] 
| Log an unformatted message if its severity meets the threshold.
| xref:BloombergLP/bsls/Log/logMessageHandler-08.adoc[`logMessageHandler`] 
| Return the address of the currently installed log message handler.
| xref:BloombergLP/bsls/Log/platformDefaultMessageHandler.adoc[`platformDefaultMessageHandler`] 
| Write a formatted log record to a platform‐specific destination.
| xref:BloombergLP/bsls/Log/setLogMessageHandler.adoc[`setLogMessageHandler`] 
| Install the specified `handler` as the current log message handler.
| xref:BloombergLP/bsls/Log/setSeverityThreshold.adoc[`setSeverityThreshold`] 
| Set the severity threshold at which log records are written by `logMessage` and `logFormattedMessage` to the specified `severity`.
| xref:BloombergLP/bsls/Log/severityThreshold.adoc[`severityThreshold`] 
| Return the currently configured severity threshold at or above which records are written by `logMessage` and `logFormattedMessage`.
| xref:BloombergLP/bsls/Log/stderrMessageHandler.adoc[`stderrMessageHandler`] 
| Write a formatted log record to the `stderr` stream.
| xref:BloombergLP/bsls/Log/stdoutMessageHandler.adoc[`stdoutMessageHandler`] 
| Write a formatted log record to the `stdout` stream.
|===



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