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added useful macro for logger

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This commit is contained in:
UPSquared
2018-05-22 17:33:49 +03:00
committed by Stefan Andritoiu
parent e3f1533652
commit 9d6944f9b8
2 changed files with 21 additions and 16 deletions
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6
examples/c++/logger.cxx
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@@ -5,12 +5,12 @@ using namespace upm;
int main() int main()
{ {
UPM_LOGGER::getLogLevel() = LOG_ERROR; UPM_LOGGER::LogLevel() = LOG_INFO;
UPM_LOGGER().get(LOG_WARNING) << "a loop with 4 iterations"; UPM_LOG(LOG_WARNING) << "a loop with 4 iterations";
for (int i = 0; i < 4; ++i) { for (int i = 0; i < 4; ++i) {
UPM_LOGGER().get(LOG_DEBUG) << "i = " << i; UPM_LOG(LOG_DEBUG) << "i = " << i;
} }
return 0; return 0;

25
include/upm_logger.hpp
View File

@@ -5,6 +5,13 @@
#include <chrono> #include <chrono>
#include <stdio.h> #include <stdio.h>
/* Helper macro for logger utility class. */
#define UPM_LOG(log_level) \
if ( log_level < UPM_LOGGER::LogLevel() ) \
; \
else \
UPM_LOGGER().log(log_level)
namespace upm { namespace upm {
enum UpmLogLevel { enum UpmLogLevel {
@@ -27,14 +34,15 @@ namespace upm {
public: public:
UPM_LOGGER(); UPM_LOGGER();
virtual ~UPM_LOGGER(); virtual ~UPM_LOGGER();
std::ostringstream& get(UpmLogLevel level = LOG_INFO); std::ostringstream& log(UpmLogLevel level = LOG_ERROR);
static UpmLogLevel& getLogLevel(); static UpmLogLevel& LogLevel();
protected: protected:
std::ostringstream os; std::ostringstream os;
private: private:
UPM_LOGGER(const UPM_LOGGER&); UPM_LOGGER(const UPM_LOGGER&);
UPM_LOGGER& operator=(const UPM_LOGGER&); UPM_LOGGER& operator=(const UPM_LOGGER&);
private: private:
// Track logLevel for this particular instance of UPM_LOGGER
UpmLogLevel logLevel; UpmLogLevel logLevel;
public: public:
@@ -51,20 +59,22 @@ namespace upm {
UPM_LOGGER::UPM_LOGGER() {} UPM_LOGGER::UPM_LOGGER() {}
UpmLogLevel& UPM_LOGGER::getLogLevel() UpmLogLevel& UPM_LOGGER::LogLevel()
{ {
static UpmLogLevel reportingLevel = LOG_DEBUG; static UpmLogLevel reportingLevel = LOG_DEBUG;
return reportingLevel; return reportingLevel;
} }
std::ostringstream& UPM_LOGGER::get(UpmLogLevel level) std::ostringstream& UPM_LOGGER::log(UpmLogLevel level)
{ {
using namespace std::chrono; using namespace std::chrono;
os << "- " << duration_cast<milliseconds> os << "UPM - " << duration_cast<milliseconds>
(system_clock::now().time_since_epoch()).count(); (system_clock::now().time_since_epoch()).count();
os << " " << getLogLevelName(level) << ": "; os << " " << getLogLevelName(level) << ": ";
os << std::string(level > LOG_DEBUG ? level - LOG_DEBUG : 0, '\t'); os << std::string(level > LOG_DEBUG ? level - LOG_DEBUG : 0, '\t');
logLevel = level; logLevel = level;
return os; return os;
@@ -72,13 +82,8 @@ namespace upm {
UPM_LOGGER::~UPM_LOGGER() UPM_LOGGER::~UPM_LOGGER()
{ {
if (logLevel >= UPM_LOGGER::getLogLevel()) {
os << std::endl; os << std::endl;
fprintf(stderr, "%s", os.str().c_str()); fprintf(stderr, "%s", os.str().c_str());
fflush(stderr); fflush(stderr);
} }
}
} }