1 // TortoiseSVN - a Windows shell extension for easy version control
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3 // Copyright (C) 2003-2008 - TortoiseSVN
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5 // This program is free software; you can redistribute it and/or
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6 // modify it under the terms of the GNU General Public License
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7 // as published by the Free Software Foundation; either version 2
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8 // of the License, or (at your option) any later version.
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10 // This program is distributed in the hope that it will be useful,
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11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 // GNU General Public License for more details.
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15 // You should have received a copy of the GNU General Public License
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16 // along with this program; if not, write to the Free Software Foundation,
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17 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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23 * Implements a reader-writer lock.
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31 bool WaitToRead(DWORD waitTime = INFINITE);
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32 bool WaitToWrite(DWORD waitTime = INFINITE);
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34 bool IsWriter() {return ((m_nWaitingWriters > 0) || (m_nActive < 0));}
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35 #if defined (DEBUG) || defined (_DEBUG)
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36 void AssertLock() {ATLASSERT(m_nActive);}
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37 void AssertWriting() {ATLASSERT((m_nWaitingWriters || (m_nActive < 0)));}
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39 void AssertLock() {;}
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40 void AssertWriting() {;}
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43 int m_nWaitingReaders; // Number of readers waiting for access
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44 int m_nWaitingWriters; // Number of writers waiting for access
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45 int m_nActive; // Number of threads accessing the section
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46 CRITICAL_SECTION m_cs;
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