NAME

tis_read_unlock − Unlocks a read-write lock that was acquired for read access. 

LIBRARY

Standard C Library (libc.so, libc.a)

SYNOPSIS

#include <tis.h>

int   tis_read_lock(
                       tis_rwlock_t   ∗lock);

STANDARDS

None

PARAMETERS

lockAddress of the read-write lock to be unlocked. 

DESCRIPTION

This routine unlocks a read-write lock that was acquired for read access.  If there are no other holders of the lock for read access and another thread is waiting to acquire the lock for write access, that lock acquisition is granted. 

RETURN VALUES

If an error condition occurs, this routine returns an integer value indicating the type of error.  Possible return values are as follows:

0Successful completion. 

[EINVAL]The value specified by lock is invalid. 

ERRORS

None

RELATED INFORMATION

Functions: tis_read_lock(3), tis_read_trylock(3), tis_rwlock_destroy(3), tis_rwlock_init(3), tis_write_lock(3), tis_write_trylock(3), tis_write_unlock(3)

Manuals: Guide to DECthreads and Programmer’s Guide