Mercurial > noffle

annotate src/control.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 125d79c9e586
children fed1334d766b
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 control.c
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3
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4 $Id: control.c 60 2000-05-09 22:28:38Z uh1763 $
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5 */
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6
45
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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 "control.h"
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12 #include <stdio.h>
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13 #include "common.h"
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14 #include "content.h"
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15 #include "database.h"
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16 #include "group.h"
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17 #include "itemlist.h"
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18 #include "log.h"
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19 #include "outgoing.h"
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20 #include "portable.h"
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21
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22 int
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23 Ctrl_cancel( const char *msgId )
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24 {
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25 ItemList *refs;
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26 const char *ref;
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27 Str server;
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28 Bool seen = FALSE;
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29 int res = CANCEL_OK;
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30
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31 /* See if in outgoing and zap if so. */
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32 if ( Out_find( msgId, server ) )
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33 {
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34 Out_remove( server, msgId );
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35 Log_inf( "'%s' cancelled from outgoing queue for '%s'.\n",
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36 msgId, server );
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37 seen = TRUE;
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38 }
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40 if ( ! Db_contains( msgId ) )
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41 {
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42 Log_inf( "Cancel: '%s' not in database.", msgId );
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43 return seen ? CANCEL_OK : CANCEL_NO_SUCH_MSG;
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44 }
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46 /*
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47 Retrieve the Xrefs, remove from each group and then
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48 remove from the database.
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49 */
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50 refs = new_Itl( Db_xref( msgId ), " " );
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51 for( ref = Itl_first( refs ); ref != NULL; ref = Itl_next( refs ) )
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52 {
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53 Str grp;
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54 int no;
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55
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56 if ( sscanf( ref, "%s:%d", grp, &no ) != 2 )
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57 break;
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58
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59 if ( Grp_exists( grp ) )
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60 {
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61 Cont_read( grp );
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62 Cont_delete( no );
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63 Cont_write();
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65 if ( ! Grp_local( grp ) && ! seen )
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66 res = CANCEL_NEEDS_MSG;
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67
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68 Log_dbg( "Removed '%s' from group '%s'.", msgId, grp );
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69 }
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70 else
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71 {
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72 Log_inf( "Group '%s' in Xref for '%s' not found.", grp, msgId );
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73 }
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74 }
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75 del_Itl( refs );
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76 Db_delete( msgId );
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77 Log_inf( "Message '%s' cancelled.", msgId );
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78 return res;
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79 }