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add comments to help understanding pthread

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Rogerz Zhang
2013-03-28 23:26:46 +08:00
parent 8e6a534fa3
commit e9cf10daed
2 changed files with 13 additions and 5 deletions
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6
components/pthreads/pthread.h
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@@ -104,9 +104,9 @@ struct pthread_rwlock
pthread_cond_t rw_condreaders; /* for reader threads waiting */
pthread_cond_t rw_condwriters; /* for writer threads waiting */
int rw_nwaitreaders; /* the number waiting */
int rw_nwaitwriters; /* the number waiting */
int rw_refcount;
int rw_nwaitreaders; /* the number of reader threads waiting */
int rw_nwaitwriters; /* the number of writer threads waiting */
int rw_refcount; /* 0: unlocked, -1: locked by writer, > 0 locked by n readers */
};
typedef struct pthread_rwlock pthread_rwlock_t;