Mercurial > noffle

annotate src/request.h @ 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 32ba1198c6fa
children 6f99218719e4
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 request.h
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3
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4 Collection of requested articles.
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6 $Id: request.h 51 2000-05-05 23:49:38Z uh1763 $
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7 */
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8
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9 #ifndef REQ_H
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10 #define REQ_H
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12 #if HAVE_CONFIG_H
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13 #include <config.h>
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14 #endif
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16 #include "common.h"
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18 /* Is request for message msgId from server serv already recorded? This
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19 function has no error detection facility. On error, FALSE is returned.
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20 Nevertheless, errors are logged. */
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21 Bool
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22 Req_contains( const char *serv, const char *msgId );
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23
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24 /* Add request for message "msgId" from server "serv". Return TRUE if
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25 successful. */
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26 Bool
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27 Req_add( const char *serv, const char *msgId );
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29 /* Remove request for message msgIg from server serv. This function does
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30 not return any errors. Nevertheless, they are logged. */
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31 void
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32 Req_remove( const char *serv, const char *msgId );
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34 /* Begin iteration through all messages requested from one server. Return
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35 TRUE if there are any requests. Save first message ID in msgId. On
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36 error, it is logged, and FALSE is returned.
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37 */
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38 Bool
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39 Req_first( const char *serv, Str msgId );
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40
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41 /* Continue iteration. Return TRUE on success, FALSE when there are no more
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42 requests. Save message ID in msgId. On error, it is logged, and FALSE is
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43 returned. */
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44 Bool
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45 Req_next( Str msgId );
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47 /* Get exclusive access to the request files. Refresh cache as necessary. */
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48 Bool
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49 Req_open(void);
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51 /* Write changes to disk */
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52 void
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53 Req_close(void);
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55 #endif