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annotate src/lock.c @ 278:a0497ffac49b noffle

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[svn] I'm not very good at automake. Redo with automake2.13.
author bears
date Sun, 10 Nov 2002 18:49:41 +0000
parents 3477050e8d10
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
43
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1 /*
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2 lock.c
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3
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4 $Id: lock.c 403 2002-11-10 11:32:17Z 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 <stdio.h>
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12 #include <errno.h>
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13 #include <ctype.h>
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14 #include <sys/types.h>
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15 #include <sys/stat.h>
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16 #include <fcntl.h>
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17 #include <signal.h>
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18
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19 #if TIME_WITH_SYS_TIME
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20 #include <sys/time.h>
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21 #include <time.h>
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22 #else
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23 #if HAVE_SYS_TIME_H
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24 #include <sys/time.h>
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25 #else
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26 #include <time.h>
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27 #endif
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28 #endif
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29
43
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30 #include <unistd.h>
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31 #include "configfile.h"
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32 #include "content.h"
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33 #include "lock.h"
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34 #include "log.h"
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35 #include "database.h"
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36 #include "group.h"
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37 #include "request.h"
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38 #include "portable.h"
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39 #include "server.h"
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40 #include "util.h"
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41
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42 struct Lock
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43 {
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44 const char *name;
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45 int lockFd;
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46 Str lockFile;
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47 Bool doLazyLocking;
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48 volatile Bool lazyClose;
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49 volatile Bool lazyLockBusy;
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50 };
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51
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52 static struct Lock globalLock = { "global", -1, "", TRUE, FALSE, FALSE };
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53 static struct Lock fetchLock = { "fetch", -1, "", FALSE, FALSE, FALSE };
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54
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55 static SignalHandler oldHandler = NULL;
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56
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57 /* Block/unblock SIGUSR1. */
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58 static Bool
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59 blockSignal( Bool block )
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60 {
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61 sigset_t sigs;
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62
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63 sigemptyset(&sigs);
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64 sigaddset(&sigs, SIGUSR1);
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65
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66 for(;;)
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67 {
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68 if ( sigprocmask( block ? SIG_BLOCK : SIG_UNBLOCK, &sigs, NULL ) != 0 )
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69 {
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70 if ( errno != EINTR )
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71 {
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72 Log_err( "Can't block/unblock signal" );
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73 return FALSE;
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74 }
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75 }
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76 else
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77 return TRUE;
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78 }
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79 /* NOTREACHED */
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80 }
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81
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82 /* Check the global lock held. */
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83 static Bool
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84 gotLock( struct Lock *lock )
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85 {
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86 return ( lock->lockFd != -1 );
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87 }
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88
165
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89 static void
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90 lockWaitAlarm( int sig )
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91 {
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92 UNUSED( sig );
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93
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94 return;
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95 }
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96
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97 static Bool
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98 waitLock( struct Lock *lock, enum LockRequestWait wait )
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99 {
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100 int fd;
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101 struct flock l;
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102
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103 ASSERT( ! gotLock( lock ) );
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104 Log_dbg( LOG_DBG_NEWSBASE, "Waiting for lock %s ...", lock->name );
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105 if ( lock->lockFile[ 0 ] == '\0' )
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106 snprintf( lock->lockFile, MAXCHAR, "%s/lock/%s",
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107 Cfg_spoolDir(), lock->name );
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108 if ( ( fd = open( lock->lockFile, O_WRONLY | O_CREAT, 0644 ) ) < 0 )
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109 {
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110 Log_err( "Cannot open %s (%s)", lock->lockFile, strerror( errno ) );
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111 return FALSE;
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112 }
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113 l.l_type = F_WRLCK;
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114 l.l_start = 0;
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115 l.l_whence = SEEK_SET;
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116 l.l_len = 0;
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117 if ( wait == LOCK_WAIT )
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118 {
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119 SignalHandler oldAlarmHandler;
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120 unsigned oldAlarm;
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121
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122 oldAlarmHandler = Utl_installSignalHandler( SIGALRM, lockWaitAlarm );
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123 oldAlarm = alarm( 1 );
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124 for(;;)
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125 {
165
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
126 alarm( 1 );
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
127 if ( fcntl( fd, F_SETLKW, &l ) < 0 )
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
128 if ( errno != EINTR )
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
129 {
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
130 Utl_installSignalHandler( SIGALRM, oldAlarmHandler );
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
131 alarm( oldAlarm );
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
132 Log_err( "Cannot lock %s: %s", lock->lockFile,
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
133 strerror( errno ) );
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
134 close( lock->lockFd );
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
135 return FALSE;
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
136 }
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
137 else
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
138 {
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
139 /* Send SIGUSR1 to the process holding the lock. */
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
140 if ( fcntl( fd, F_GETLK, &l) == 0 && l.l_type != F_UNLCK )
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
141 if ( kill( l.l_pid, SIGUSR1 ) < 0 )
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
142 Log_err( "Can't signal process %d: %s", l.l_pid,
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
143 strerror( errno ) );
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
144 }
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
145 else
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
146 break;
127
3c71e28c8eef [svn] Release-1-0 mergedocs/NOTES
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diff changeset
147 }
165
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
148 Utl_installSignalHandler( SIGALRM, oldAlarmHandler );
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
149 alarm( oldAlarm );
43
2842f50feb55 [svn] * client.c, client.h, common.h, config.c, config.h, content.c, content.h,
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150 }
127
3c71e28c8eef [svn] Release-1-0 mergedocs/NOTES
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diff changeset
151 else
3c71e28c8eef [svn] Release-1-0 mergedocs/NOTES
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diff changeset
152 {
3c71e28c8eef [svn] Release-1-0 mergedocs/NOTES
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diff changeset
153 if ( fcntl( fd, F_SETLK, &l ) < 0 )
3c71e28c8eef [svn] Release-1-0 mergedocs/NOTES
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diff changeset
154 {
3c71e28c8eef [svn] Release-1-0 mergedocs/NOTES
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diff changeset
155 close( lock->lockFd );
3c71e28c8eef [svn] Release-1-0 mergedocs/NOTES
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diff changeset
156 return FALSE;
3c71e28c8eef [svn] Release-1-0 mergedocs/NOTES
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diff changeset
157 }
3c71e28c8eef [svn] Release-1-0 mergedocs/NOTES
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diff changeset
158 }
3c71e28c8eef [svn] Release-1-0 mergedocs/NOTES
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diff changeset
159
3c71e28c8eef [svn] Release-1-0 mergedocs/NOTES
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diff changeset
160 lock->lockFd = fd;
185
fed1334d766b [svn] * src/client.c: Change variable only used on constant to 'const'.
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diff changeset
161 Log_dbg( LOG_DBG_NEWSBASE, "Lock successful" );
43
2842f50feb55 [svn] * client.c, client.h, common.h, config.c, config.h, content.c, content.h,
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162 return TRUE;
2842f50feb55 [svn] * client.c, client.h, common.h, config.c, config.h, content.c, content.h,
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163 }
2842f50feb55 [svn] * client.c, client.h, common.h, config.c, config.h, content.c, content.h,
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164
2842f50feb55 [svn] * client.c, client.h, common.h, config.c, config.h, content.c, content.h,
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diff changeset
165 static void
127
3c71e28c8eef [svn] Release-1-0 mergedocs/NOTES
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diff changeset
166 releaseLock( struct Lock *lock )
43
2842f50feb55 [svn] * client.c, client.h, common.h, config.c, config.h, content.c, content.h,
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167 {
2842f50feb55 [svn] * client.c, client.h, common.h, config.c, config.h, content.c, content.h,
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168 struct flock l;
2842f50feb55 [svn] * client.c, client.h, common.h, config.c, config.h, content.c, content.h,
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diff changeset
169
127
3c71e28c8eef [svn] Release-1-0 mergedocs/NOTES
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diff changeset
170 ASSERT( gotLock( lock ) );
43
2842f50feb55 [svn] * client.c, client.h, common.h, config.c, config.h, content.c, content.h,
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diff changeset
171 l.l_type = F_UNLCK;
2842f50feb55 [svn] * client.c, client.h, common.h, config.c, config.h, content.c, content.h,
uh1763
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diff changeset
172 l.l_start = 0;
2842f50feb55 [svn] * client.c, client.h, common.h, config.c, config.h, content.c, content.h,
uh1763
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diff changeset
173 l.l_whence = SEEK_SET;
2842f50feb55 [svn] * client.c, client.h, common.h, config.c, config.h, content.c, content.h,
uh1763
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diff changeset
174 l.l_len = 0;
127
3c71e28c8eef [svn] Release-1-0 mergedocs/NOTES
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diff changeset
175 if ( fcntl( lock->lockFd, F_SETLK, &l ) < 0 )
3c71e28c8eef [svn] Release-1-0 mergedocs/NOTES
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diff changeset
176 Log_err( "Cannot release %s: %s", lock->lockFile,
43
2842f50feb55 [svn] * client.c, client.h, common.h, config.c, config.h, content.c, content.h,
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diff changeset
177 strerror( errno ) );
127
3c71e28c8eef [svn] Release-1-0 mergedocs/NOTES
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diff changeset
178 close( lock->lockFd );
3c71e28c8eef [svn] Release-1-0 mergedocs/NOTES
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diff changeset
179 lock->lockFd = -1;
185
fed1334d766b [svn] * src/client.c: Change variable only used on constant to 'const'.
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diff changeset
180 Log_dbg( LOG_DBG_NEWSBASE, "Releasing lock" );
43
2842f50feb55 [svn] * client.c, client.h, common.h, config.c, config.h, content.c, content.h,
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diff changeset
181 }
2842f50feb55 [svn] * client.c, client.h, common.h, config.c, config.h, content.c, content.h,
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diff changeset
182
165
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
183 static Bool
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
184 openDatabases( void )
43
2842f50feb55 [svn] * client.c, client.h, common.h, config.c, config.h, content.c, content.h,
uh1763
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diff changeset
185 {
165
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
186 globalLock.lazyClose = FALSE;
127
3c71e28c8eef [svn] Release-1-0 mergedocs/NOTES
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diff changeset
187 if ( ! waitLock( &globalLock, LOCK_WAIT ) )
43
2842f50feb55 [svn] * client.c, client.h, common.h, config.c, config.h, content.c, content.h,
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diff changeset
188 {
127
3c71e28c8eef [svn] Release-1-0 mergedocs/NOTES
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diff changeset
189 Log_err( "Could not get write lock" );
3c71e28c8eef [svn] Release-1-0 mergedocs/NOTES
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diff changeset
190 return FALSE;
43
2842f50feb55 [svn] * client.c, client.h, common.h, config.c, config.h, content.c, content.h,
uh1763
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diff changeset
191 }
127
3c71e28c8eef [svn] Release-1-0 mergedocs/NOTES
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diff changeset
192 if ( ! Db_open() )
43
2842f50feb55 [svn] * client.c, client.h, common.h, config.c, config.h, content.c, content.h,
uh1763
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diff changeset
193 {
127
3c71e28c8eef [svn] Release-1-0 mergedocs/NOTES
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diff changeset
194 Log_err( "Could not open database" );
3c71e28c8eef [svn] Release-1-0 mergedocs/NOTES
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parents: 54
diff changeset
195 releaseLock( &globalLock );
3c71e28c8eef [svn] Release-1-0 mergedocs/NOTES
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diff changeset
196 return FALSE;
43
2842f50feb55 [svn] * client.c, client.h, common.h, config.c, config.h, content.c, content.h,
uh1763
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diff changeset
197 }
127
3c71e28c8eef [svn] Release-1-0 mergedocs/NOTES
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diff changeset
198 if ( ! Grp_open() )
43
2842f50feb55 [svn] * client.c, client.h, common.h, config.c, config.h, content.c, content.h,
uh1763
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diff changeset
199 {
127
3c71e28c8eef [svn] Release-1-0 mergedocs/NOTES
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diff changeset
200 Log_err( "Could not open groupinfo" );
3c71e28c8eef [svn] Release-1-0 mergedocs/NOTES
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diff changeset
201 Db_close();
3c71e28c8eef [svn] Release-1-0 mergedocs/NOTES
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diff changeset
202 releaseLock( &globalLock );
3c71e28c8eef [svn] Release-1-0 mergedocs/NOTES
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diff changeset
203 return FALSE;
43
2842f50feb55 [svn] * client.c, client.h, common.h, config.c, config.h, content.c, content.h,
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diff changeset
204 }
127
3c71e28c8eef [svn] Release-1-0 mergedocs/NOTES
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diff changeset
205 if ( ! Req_open() )
43
2842f50feb55 [svn] * client.c, client.h, common.h, config.c, config.h, content.c, content.h,
uh1763
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diff changeset
206 {
127
3c71e28c8eef [svn] Release-1-0 mergedocs/NOTES
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diff changeset
207 Log_err( "Could not initialize request database" );
3c71e28c8eef [svn] Release-1-0 mergedocs/NOTES
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diff changeset
208 Grp_close();
3c71e28c8eef [svn] Release-1-0 mergedocs/NOTES
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diff changeset
209 Db_close();
3c71e28c8eef [svn] Release-1-0 mergedocs/NOTES
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diff changeset
210 releaseLock( &globalLock );
3c71e28c8eef [svn] Release-1-0 mergedocs/NOTES
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diff changeset
211 return FALSE;
43
2842f50feb55 [svn] * client.c, client.h, common.h, config.c, config.h, content.c, content.h,
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diff changeset
212 }
2842f50feb55 [svn] * client.c, client.h, common.h, config.c, config.h, content.c, content.h,
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diff changeset
213
165
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
214 globalLock.lazyClose = globalLock.doLazyLocking;
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
215 globalLock.lazyLockBusy = TRUE;
127
3c71e28c8eef [svn] Release-1-0 mergedocs/NOTES
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diff changeset
216 return TRUE;
43
2842f50feb55 [svn] * client.c, client.h, common.h, config.c, config.h, content.c, content.h,
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diff changeset
217 }
2842f50feb55 [svn] * client.c, client.h, common.h, config.c, config.h, content.c, content.h,
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diff changeset
218
165
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
219 static void
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
220 closeDatabases( void )
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
221 {
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
222 Grp_close();
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
223 Db_close();
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
224 Req_close();
167
7ba337dafb2c [svn] * TODO,content.c,lock.c,server.c,server.h: Remove bug notice re:
bears
parents: 165
diff changeset
225 Server_flushCache();
165
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
226 releaseLock( &globalLock );
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
227 globalLock.lazyLockBusy = FALSE;
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
228 globalLock.lazyClose = FALSE;
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
229 }
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
230
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
231 static void
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
232 lockSignal( int sig )
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
233 {
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
234 UNUSED( sig );
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
235
183
c912e8288164 [svn] * src/client.c: Only bail out of fetching multiple articles if the
bears
parents: 167
diff changeset
236 /*
c912e8288164 [svn] * src/client.c: Only bail out of fetching multiple articles if the
bears
parents: 167
diff changeset
237 * If we hold the lock right now, flag it to be released next close.
c912e8288164 [svn] * src/client.c: Only bail out of fetching multiple articles if the
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parents: 167
diff changeset
238 * Otherwise, if we are holding it lazily, release it.
c912e8288164 [svn] * src/client.c: Only bail out of fetching multiple articles if the
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diff changeset
239 */
165
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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parents: 127
diff changeset
240 if ( globalLock.lazyLockBusy )
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
241 globalLock.lazyClose = FALSE;
183
c912e8288164 [svn] * src/client.c: Only bail out of fetching multiple articles if the
bears
parents: 167
diff changeset
242 else if ( gotLock( &globalLock ) )
165
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
243 closeDatabases();
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
244 return;
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
245 }
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
246
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
247 /* Open all databases and set global lock. */
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
248 Bool
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
249 Lock_openDatabases( void )
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
250 {
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
251 Bool res;
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
252
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
253 /* First time - need to initialise signal handler? */
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
254 if ( oldHandler == NULL )
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
255 oldHandler = Utl_installSignalHandler( SIGUSR1, lockSignal );
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
256
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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diff changeset
257 if ( ! blockSignal( TRUE ) )
8ea6b5ddc5a5 [svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release
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258 return FALSE;
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259
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260 if ( ! globalLock.lazyClose )
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261 res = openDatabases();
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262 else
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263 res = TRUE;
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264
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265 globalLock.lazyLockBusy = res;
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266
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267 if ( ! blockSignal( FALSE ) )
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268 return FALSE;
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269
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270 return res;
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271 }
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272
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273 /* Close all databases and release global lock. */
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274 void
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275 Lock_closeDatabases( void )
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276 {
165
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277 blockSignal( TRUE );
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278
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279 if ( ! globalLock.lazyClose )
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280 closeDatabases();
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281 else
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282 globalLock.lazyLockBusy = FALSE;
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283
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284 blockSignal( FALSE );
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285 }
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286
183
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287 /* Sync all databases to disc. Maintain global lock status. */
165
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288 void
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289 Lock_syncDatabases( void )
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290 {
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291 Bool wasOpen;
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292
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293 if ( gotLock( &globalLock ) )
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294 {
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295 blockSignal( TRUE );
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296
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297 wasOpen = globalLock.lazyLockBusy;
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298 closeDatabases();
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299 if ( wasOpen )
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300 openDatabases();
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301
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302 blockSignal( FALSE );
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303 }
127
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304 }
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305
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306 /* Check the global lock held. */
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307 Bool
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308 Lock_gotLock( void )
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309 {
165
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310 return globalLock.lazyLockBusy;
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311 }
127
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312
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313 /* Get fetch lock. */
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314 Bool
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315 Lock_getFetchLock( enum LockRequestWait wait )
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316 {
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317 return waitLock( &fetchLock, wait );
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318 }
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319
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320 /* Release fetch lock. */
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321 void
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322 Lock_releaseFetchLock( void )
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323 {
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324 releaseLock( &fetchLock );
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325 }
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326
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327 /* Check the fetch lock held. */
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328 Bool
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329 Lock_fetchLock( void )
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330 {
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331 return gotLock( &fetchLock );
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332 }
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333