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tis_write_trylock

Section: C Library Functions (3)
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NAME

tis_write_trylock - Attempts to acquire the specified read-write lock for write access.  

LIBRARY

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

SYNOPSIS

#include <tis.h>

int tis_write_trylock(
                       tis_rwlock_t   *lock);  

STANDARDS

None  

PARAMETERS

Address of the read-write lock to be acquired for write access.  

DESCRIPTION

This routine attempts to acquire a read-write lock for write access. The routine attempts to immediately acquire the lock. If the lock is acquired, zero (0) is returned. If the lock is held by another thread (for either read or write access), [EBUSY] is returned and the calling thread does not wait for the write-access lock to be acquired.

Note that it is a coding error to attempt to acquire the lock for write access if the lock is already held by the calling thread. (However, this routine returns [EBUSY] anyway, because no ownership error-checking takes place.)

 

RETURN VALUES

If an error condition occurs, this routine returns an integer value indicating the type of error. Possible return values are as follows: Successful completion; the lock is acquired for write access. The lock was not acquired for write access, as it is already held by another thread.  

ERRORS

None  

RELATED INFORMATION

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

Manuals: Guide to DECthreads and Programmer's Guide delim off


 

Index

NAME
LIBRARY
SYNOPSIS
STANDARDS
PARAMETERS
DESCRIPTION
RETURN VALUES
ERRORS
RELATED INFORMATION

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Time: 02:41:10 GMT, October 02, 2010