/* symTblLockLib.c - sym table locking mechanisms *//* Copyright 1984-1994 Wind River Systems, Inc. *//*modification history--------------------01c,05jan94,kdl	 general cleanup.01b,13dec93,dvs	 made NOMANUAL01a,06apr93,smb	 created*//*DESCRIPTIONThis module provides functionality for synchronizing the use of a symbol table created by symTblCreate(). INCLUDE FILES: SEE ALSO:NOMANUAL*/#include "vxWorks.h"#include "semLib.h"#include "symLib.h"/********************************************************************************* symTblLock - lock a name table.** This routine provides a mechanism for locking out a symbol table so that* it cannot be used by other tasks.** RETURNS: OK, or ERROR if <symTblId> invalid** NOMANUAL*/STATUS symTblLock    (    SYMTAB_ID symTblId         /* ID of symbol table to lock */    )    {    if (OBJ_VERIFY (symTblId, symTblClassId) != OK)        return (ERROR);                         /* invalid symbol table ID */    semTake (&symTblId->symMutex, WAIT_FOREVER);    return (OK);    }/********************************************************************************* symTblUnlock - Unlock a name table.** This routine unlocks a symbol table that has be locked via symTblLock().** RETURNS: OK, or ERROR if <symTblId> invalid** NOMANUAL*/STATUS symTblUnlock    (    SYMTAB_ID symTblId         /* ID of symbol table to unlock */    )    {    if (OBJ_VERIFY (symTblId, symTblClassId) != OK)        return (ERROR);                         /* invalid symbol table ID */    semGive (&symTblId->symMutex);          /* release mutual exclusion */    return (OK);    }