/usr/include/globus/globus_thread_rw_mutex.h is in libglobus-common-dev 14.10-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright 1999-2006 University of Chicago
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef GLOBUS_INCLUDE_GLOBUS_RW_MUTEX
#define GLOBUS_INCLUDE_GLOBUS_RW_MUTEX 1
#include "globus_common_include.h"
#include "globus_thread.h"
EXTERN_C_BEGIN
typedef struct
{
globus_mutex_t mutex;
struct globus_i_rw_mutex_waiter_s * waiters;
struct globus_i_rw_mutex_waiter_s ** tail;
struct globus_i_rw_mutex_waiter_s * idle;
globus_bool_t writing;
int readers;
} globus_rw_mutex_t;
typedef int globus_rw_mutexattr_t;
int
globus_rw_mutex_init(
globus_rw_mutex_t * rw_lock,
globus_rw_mutexattr_t * attr);
int
globus_rw_mutex_readlock(
globus_rw_mutex_t * rw_lock);
int
globus_rw_mutex_writelock(
globus_rw_mutex_t * rw_lock);
int
globus_rw_mutex_readunlock(
globus_rw_mutex_t * rw_lock);
int
globus_rw_mutex_writeunlock(
globus_rw_mutex_t * rw_lock);
int
globus_rw_mutex_destroy(
globus_rw_mutex_t * rw_lock);
/**
* In order to use the following cond_wait calls safeley, either the call to
* one of the wait calls or the call to cond_signal/broadcast or both MUST be
* called from within a WRITElock.
*
* It turns out that you normally only signal/broadcast after making some
* modification anyway, so the simple rule to remember is:
*
* Always call globus_cond_signal/broadcast from within a WRITElock.
*/
int
globus_rw_cond_wait(
globus_cond_t * cond,
globus_rw_mutex_t * rw_lock);
int
globus_rw_cond_timedwait(
globus_cond_t * cond,
globus_rw_mutex_t * rw_lock,
globus_abstime_t * abstime);
EXTERN_C_END
#endif
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