Content-type: text/html Man page of tis_read_trylock

tis_read_trylock

Section: C Library Functions (3)
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NAME

tis_read_trylock - Attempts to acquire a read-write lock for read access. 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 acquire 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 indicating 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


 

Index

NAME
LIBRARY
SYNOPSIS
STANDARDS
PARAMETERS
DESCRIPTION
RETURN VALUES
ERRORS
RELATED INFORMATION

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Time: 02:41:34 GMT, October 02, 2010