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QLogging: simplify qDefaultMessageHandler() with a global constant

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Namely, a function pointer to the actual sink function.

This doesn't remove the future ability to iterate over multiple sinks,
but I removed the comment anyway because it doesn't look like we'll ever
implement that.

Change-Id: Ifa1111900d6945ea8e05fffd177de7fa46230259
Reviewed-by: Alex Blasche <alexander.blasche@qt.io>
This commit is contained in:
Thiago Macieira 2023-08-22 17:04:58 -07:00
parent a668ed44dc
commit 039ea9b40f
2 changed files with 34 additions and 25 deletions
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52
src/corelib/global/qlogging.cpp
View File

@ -1901,40 +1901,46 @@ static void stderr_message_handler(QtMsgType type, const QMessageLogContext &con
fflush(stderr);
}
using SystemMessageSink = bool(QtMsgType, const QMessageLogContext &, const QString &);
static constexpr SystemMessageSink *systemMessageSink =
#if defined(QT_BOOTSTRAPPED)
nullptr
#elif defined(Q_OS_WIN)
win_message_handler
#elif QT_CONFIG(slog2)
slog2_default_handler
#elif QT_CONFIG(journald)
systemd_default_message_handler
#elif QT_CONFIG(syslog)
syslog_default_message_handler
#elif defined(Q_OS_ANDROID)
android_default_message_handler
#elif defined(QT_USE_APPLE_UNIFIED_LOGGING)
AppleUnifiedLogger::messageHandler
#elif defined Q_OS_WASM
wasm_default_message_handler
#else
nullptr
#endif
;
/*!
\internal
*/
static void qDefaultMessageHandler(QtMsgType type, const QMessageLogContext &context,
const QString &message)
{
bool handledStderr = false;
// A message sink logs the message to a structured or unstructured destination,
// optionally formatting the message if the latter, and returns true if the sink
// handled stderr output as well, which will shortcut our default stderr output.
// In the future, if we allow multiple/dynamic sinks, this will be iterating
// a list of sinks.
#if !defined(QT_BOOTSTRAPPED)
# if defined(Q_OS_WIN)
handledStderr |= win_message_handler(type, context, message);
# elif QT_CONFIG(slog2)
handledStderr |= slog2_default_handler(type, context, message);
# elif QT_CONFIG(journald)
handledStderr |= systemd_default_message_handler(type, context, message);
# elif QT_CONFIG(syslog)
handledStderr |= syslog_default_message_handler(type, context, message);
# elif defined(Q_OS_ANDROID)
handledStderr |= android_default_message_handler(type, context, message);
# elif defined(QT_USE_APPLE_UNIFIED_LOGGING)
handledStderr |= AppleUnifiedLogger::messageHandler(type, context, message);
# elif defined Q_OS_WASM
handledStderr |= wasm_default_message_handler(type, context, message);
# endif
#endif
QT_WARNING_PUSH
QT_WARNING_DISABLE_GCC("-Waddress") // "the address of ~~ will never be NULL
if (systemMessageSink && systemMessageSink(type, context, message))
return;
QT_WARNING_POP
if (!handledStderr)
stderr_message_handler(type, context, message);
stderr_message_handler(type, context, message);
}
#if defined(Q_COMPILER_THREAD_LOCAL)

7
src/corelib/kernel/qcore_mac_p.h
View File

@ -236,8 +236,11 @@ QT_BEGIN_NAMESPACE
class Q_CORE_EXPORT AppleUnifiedLogger
{
public:
static bool messageHandler(QtMsgType msgType, const QMessageLogContext &context, const QString &message,
const QString &subsystem = QString());
static bool messageHandler(QtMsgType msgType, const QMessageLogContext &context,
const QString &message)
{ return messageHandler(msgType, context, message, QString()); }
static bool messageHandler(QtMsgType msgType, const QMessageLogContext &context,
const QString &message, const QString &subsystem);
static bool preventsStderrLogging();
private:
static os_log_type_t logTypeForMessageType(QtMsgType msgType);