123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566 |
- [/
- (C) Copyright 2012 Vicente J. Botet Escriba.
- Distributed under the Boost Software License, Version 1.0.
- (See accompanying file LICENSE_1_0.txt or copy at
- http://www.boost.org/LICENSE_1_0.txt).
- ]
- [section:tutorial Tutorial]
- [@http://web.archive.org/web/20140531071228/http://home.roadrunner.com/~hinnant/mutexes/locking.html Handling mutexes in C++] is an excellent tutorial. You need just replace std and ting by boost.
- [@http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2406.html Mutex, Lock, Condition Variable Rationale] adds rationale for the design decisions made for mutexes, locks and condition variables.
- In addition to the C++11 standard locks, Boost.Thread provides other locks and some utilities that help the user to make their code thread-safe.
- [include internal_locking.qbk]
- [include external_locking.qbk]
- [section:with Executing Around a Function]
- In particular, the library provides a way to lock around the execution of a function.
- template <class Lockable, class Function, class... Args>
- auto with_lock_guard(
- Lockable& m,
- Function&& func,
- Args&&... args
- ) -> decltype(func(boost::forward<Args>(args)...)) {
- boost::lock_guard<Lockable> lock(m);
- return func(boost::forward<Args>(args)...);
- }
- that can be used with regular functions:
- int func(int, int&);
- //...
- boost::mutex m;
- int a;
- int result = boost::with_lock_guard(m, func, 1, boost::ref(a));
- with boost::bind:
- int result = boost::with_lock_guard(
- m, boost::bind(func, 2, boost::ref(a))
- );
- or with lambda expression:
- int a;
- int result = boost::with_lock_guard(
- m,
- [&a](int x) {
- // this scope is protected by mutex m
- a = 3;
- return x + 4;
- },
- 5
- );
- [endsect] [/ With]
- [endsect] [/ Tutorial]
|