00001 /* SVN FILE INFO 00002 * $Revision: 174 $ : Last Committed Revision 00003 * $Date: 2008年06月24日 10:50:29 -0700 (2008年6月24日) $ : Last Committed Date */ 00004 /*[ 00005 * Copyright (c) 2007 Integration Engineering Laboratory 00006 University of California, Davis 00007 * 00008 * Permission to use, copy, and distribute this software and its 00009 * documentation for any purpose with or without fee is hereby granted, 00010 * provided that the above copyright notice appear in all copies and 00011 * that both that copyright notice and this permission notice appear 00012 * in supporting documentation. 00013 * 00014 * Permission to modify the software is granted, but not the right to 00015 * distribute the complete modified source code. Modifications are to 00016 * be distributed as patches to the released version. Permission to 00017 * distribute binaries produced by compiling modified sources is granted, 00018 * provided you 00019 * 1. distribute the corresponding source modifications from the 00020 * released version in the form of a patch file along with the binaries, 00021 * 2. add special version identification to distinguish your version 00022 * in addition to the base release version number, 00023 * 3. provide your name and address as the primary contact for the 00024 * support of your modified version, and 00025 * 4. retain our contact information in regard to use of the base 00026 * software. 00027 * Permission to distribute the released version of the source code along 00028 * with corresponding source modifications in the form of a patch file is 00029 * granted with same provisions 2 through 4 for binary distributions. 00030 * 00031 * This software is provided "as is" without express or implied warranty 00032 * to the extent permitted by applicable law. 00033 ]*/ 00034 00035 #ifndef _MC_RWLOCK_H_ 00036 #define _MC_RWLOCK_H_ 00037 #include "macros.h" 00038 00039 typedef struct mc_rwlock_s { 00040 int num_readers; 00041 int write_flag; 00042 int write_request; 00043 MUTEX_T *lock; 00044 COND_T *cond; 00045 } mc_rwlock_t; 00046 typedef mc_rwlock_t* mc_rwlock_p; 00047 00048 int mc_rwlock_init(mc_rwlock_p rwlock); 00049 int mc_rwlock_destroy(mc_rwlock_p rwlock); 00050 00051 int mc_rwlock_rdlock(mc_rwlock_p rwlock); 00052 int mc_rwlock_rdunlock(mc_rwlock_p rwlock); 00053 00054 int mc_rwlock_wrlock(mc_rwlock_p rwlock); 00055 int mc_rwlock_wrunlock(mc_rwlock_p rwlock); 00056 00057 #endif /* _MC_RWLOCK_H_ */