Mercurial > noffle

annotate src/log.c @ 165:8ea6b5ddc5a5 noffle

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[svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release the lock and close the databases if (a) another process signals us SIGUSR1 indicating it wants the lock, or (b) it is explicitly requested by a call to new function Lock_syncDatabases(). When waiting for the lock, SIGUSR1 the holding process every second. This is all an attempt to minimise the number of times we need to close and open the database. When (ha!) the database is replaced by something that can handle multiple simultaneous writers (with appropriate locking) this won't be necessary.
author bears
date Thu, 25 Jan 2001 13:38:31 +0000
parents c874bd3c4bb8
children fed1334d766b
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 log.c
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3
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4 $Id: log.c 79 2000-05-13 15:35:17Z bears $
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5 */
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6
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7 #if HAVE_CONFIG_H
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8 #include <config.h>
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9 #endif
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10
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11 #include <syslog.h>
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12 #include <stdarg.h>
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13 #include "common.h"
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14 #include "log.h"
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15 #include "portable.h"
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16
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17 #define MAXLENGTH 240
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18
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19 struct
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20 {
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21 Bool interactive;
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22 } log = { FALSE };
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23
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24 void
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25 Log_init( const char *name, Bool interactive, int facility )
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26 {
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27 int option = LOG_PID | LOG_CONS;
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29 log.interactive = interactive;
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30 openlog( name, option, facility );
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31 }
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33 #define DO_LOG( LEVEL ) \
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34 va_list ap; \
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35 Str t; \
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36 \
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37 va_start( ap, fmt ); \
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38 vsnprintf( t, MAXCHAR, fmt, ap ); \
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39 if ( MAXLENGTH < MAXCHAR ) \
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40 t[ MAXLENGTH ] = '\0'; \
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41 syslog( LEVEL, "%s", t ); \
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42 if ( log.interactive ) \
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43 fprintf( stderr, "%s\n", t ); \
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44 va_end( ap );
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46 void
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47 Log_inf( const char *fmt, ... )
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48 {
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49 DO_LOG( LOG_INFO );
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50 }
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51
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52 void
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53 Log_err( const char *fmt, ... )
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54 {
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55 DO_LOG( LOG_ERR );
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56 }
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58 /* Ensure the condition "cond" is true; otherwise log an error and return 1 */
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59 int
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60 Log_check(int cond, const char *fmt, ... )
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61 {
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62 if (!cond) {
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63 DO_LOG( LOG_ERR );
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64 return 1;
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65 }
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66 return 0;
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67 }
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69 void
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70 Log_ntc( const char *fmt, ... )
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71 {
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72 DO_LOG( LOG_NOTICE );
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73 }
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74
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75 void
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76 Log_dbg( const char *fmt, ... )
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77 {
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78 #ifdef DEBUG
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79 DO_LOG( LOG_DEBUG );
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80 #endif
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81 }