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tis_read_trylock(3) Library Functions Manual tis_read_trylock(3) NAME tis_read_trylock - Attempts to acquire a read-write lock for read ac- cess. Does not wait if the lock cannot be immediately granted. LIBRARY Standard C Library (libc.so, libc.a) SYNOPSIS #include <tis.h> int tis_read_trylock( tis_rwlock_t *lock); STANDARDS None PARAMETERS Address of the read-write lock to be acquired. DESCRIPTION This routine attempts to acquire a read-write lock for read access. If the lock cannot be granted, the routine returns without waiting. When a thread calls this routine, an attempt is made to immediately ac- quire the lock for read access. If the lock is acquired, zero (0) is returned. If a holder of the lock for write access exists, [EBUSY] is returned. If the lock cannot be acquired for read access immediately, the calling program does not wait for the lock to be released. RETURN VALUES If an error condition occurs, this routine returns an integer value in- dicating the type of error. Possible return values are as follows: Successful completion; the lock was acquired. The lock is being held for write access. The lock for read access was not acquired. ERRORS None RELATED INFORMATION Functions: tis_read_lock(3), tis_read_unlock(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 delim off tis_read_trylock(3)