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tis_write_trylock(3)
NAME
  tis_write_trylock - Attempts to acquire the specified read-write lock for
  write access

SYNOPSIS
  #include <tis.h>

  int tis_write_trylock(
	  tis_rwlock_t *lock );

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

STANDARDS
  None

PARAMETERS
  lock
      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:

  0   Successful completion; the lock is acquired for write access.

  [EBUSY]
      The lock was not acquired for write access, as it is already held by
      another thread.

ERRORS
  None

SEE ALSO
  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

Index for Section 3

Alphabetical listing for T

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