barrier/base/CLog.h

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C
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#ifndef CLOG_H
#define CLOG_H
#include "common.h"
#include <stdarg.h>
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class CLog {
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public:
enum {
kFATAL,
kERROR,
kWARNING,
kNOTE,
kINFO,
kDEBUG,
kDEBUG1,
kDEBUG2
};
// type of outputter function. return false if CLog should use
// the default outputter, true otherwise.
typedef bool (*Outputter)(int priority, const char*);
// type of lock/unlock function
typedef void (*Lock)(bool lock);
// print a log message
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static void print(const char*, ...);
static void printt(const char* file, int line, const char*, ...);
// get/set the function used to write the log. a NULL outputter
// means to use the default which is fprintf(stderr, ...). note
// that the outputter should not call CLog methods but, if it
// does, the current lock function must permit recursive locks.
static void setOutputter(Outputter);
static Outputter getOutputter();
// get/set the lock/unlock function. use setLock(NULL) to remove
// the locking function. note that the lock function is used when
// retrieving the lock function. there is no default lock function.
static void setLock(Lock);
static Lock getLock();
// get/set the minimum priority filter. any message below this
// priority is discarded. the default priority is 4 (INFO)
// (unless built without NDEBUG in which case it's 5 (DEBUG)).
// the default can be overridden by setting the SYN_LOG_PRI env
// var to "FATAL", "ERROR", etc. setFilter(const char*) returns
// true if the priority name was recognized; if name == NULL
// then it simply returns true.
static bool setFilter(const char* name);
static void setFilter(int);
static int getFilter();
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private:
class CHoldLock {
public:
CHoldLock(Lock lock) : m_lock(lock) { m_lock(true); }
~CHoldLock() { m_lock(false); }
private:
Lock m_lock;
};
static void dummyLock(bool);
static int getMaxPriority();
static void output(int priority, char* msg);
#if WINDOWS_LIKE
static void openConsole();
#endif
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private:
static Outputter s_outputter;
static Lock s_lock;
static int s_maxPriority;
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};
#if defined(NOLOGGING)
#define log(_a1)
#define logc(_a1, _a2)
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#define CLOG_TRACE
#elif defined(NDEBUG)
#define log(_a1) CLog::print _a1
#define logc(_a1, _a2) if (_a1) CLog::print _a2
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#define CLOG_TRACE
#else
#define log(_a1) CLog::printt _a1
#define logc(_a1, _a2) if (_a1) CLog::printt _a2
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#define CLOG_TRACE __FILE__, __LINE__,
#endif
#define CLOG_PRINT CLOG_TRACE "%z\057"
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#define CLOG_CRIT CLOG_TRACE "%z\060"
#define CLOG_ERR CLOG_TRACE "%z\061"
#define CLOG_WARN CLOG_TRACE "%z\062"
#define CLOG_NOTE CLOG_TRACE "%z\063"
#define CLOG_INFO CLOG_TRACE "%z\064"
#define CLOG_DEBUG CLOG_TRACE "%z\065"
#define CLOG_DEBUG1 CLOG_TRACE "%z\066"
#define CLOG_DEBUG2 CLOG_TRACE "%z\067"
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#endif