jens@0: //
jens@0: //  Logging.h
jens@0: //  MYUtilities
jens@0: //
jens@0: //  Created by Jens Alfke on 1/5/08.
jens@0: //  Copyright 2008 Jens Alfke. All rights reserved.
jens@0: //
jens@0: 
jens@11: #import <Foundation/Foundation.h>
jens@0: 
jens@0: 
jens@0: NSString* LOC( NSString *key );     // Localized string lookup
jens@0: 
jens@0: 
jens@11: // To enable IN_SEGMENT (which breaks rarely-called logging code out of your main code segment,
jens@11: // improving locality of reference) you must define MY_USE_NESTED_FNS in your prefix file or
jens@11: // target settings, and add the GCC flag "-fnested-functions" to your target's C flags.
jens@11: #if defined(MY_USE_NESTED_FNS) && ! defined(__cplusplus)
jens@8:     #define IN_SEGMENT(SEG) auto __attribute__ ((section ("__TEXT, "#SEG))) __attribute__ ((noinline)) void _outofband_(void);\
jens@8:                             _outofband_();\
jens@8:                             void _outofband_(void)
jens@11:     #define IN_SEGMENT_NORETURN(SEG) auto __attribute__ ((section ("__TEXT, "#SEG))) __attribute__ ((noinline)) __attribute__((noreturn)) void _assertfailure_(void);\
jens@11:                             _assertfailure_();\
jens@11:                             void _assertfailure_(void)
jens@11: #else
jens@11:     #define IN_SEGMENT(SEG)
jens@11:     #define IN_SEGMENT_NORETURN(SEG)
jens@8: #endif
jens@8: 
jens@8: #define Log(FMT,ARGS...) do{if(__builtin_expect(_gShouldLog,0)) {\
jens@8:                             IN_SEGMENT(Logging){_Log(FMT,##ARGS);}\
jens@8:                          } }while(0)
jens@8: #define LogTo(DOMAIN,FMT,ARGS...) do{if(__builtin_expect(_gShouldLog,0)) {\
jens@11:                                     IN_SEGMENT(Logging) {if(_WillLogTo(@""#DOMAIN)) _LogTo(@""#DOMAIN,FMT,##ARGS);}\
jens@8:                                   } }while(0)
jens@0: #define Warn Warn
jens@0: 
jens@0: void AlwaysLog( NSString *msg, ... ) __attribute__((format(__NSString__, 1, 2)));
jens@1: BOOL _WillLogTo( NSString *domain );
jens@1: BOOL EnableLog( BOOL enable );
jens@1: #define EnableLogTo( DOMAIN, VALUE )  _EnableLogTo(@""#DOMAIN, VALUE)
jens@1: #define WillLogTo( DOMAIN )  _WillLogTo(@""#DOMAIN)
jens@1: 
jens@1: 
jens@1: // internals; don't use directly
jens@1: extern int _gShouldLog;
jens@0: void _Log( NSString *msg, ... ) __attribute__((format(__NSString__, 1, 2)));
jens@0: void Warn( NSString *msg, ... ) __attribute__((format(__NSString__, 1, 2)));
jens@1: void _LogTo( NSString *domain, NSString *msg, ... ) __attribute__((format(__NSString__, 2, 3)));
jens@1: BOOL _WillLogTo( NSString *domain );
jens@1: BOOL _EnableLogTo( NSString *domain, BOOL enable );