Boost condition_variable argument error

Question

I encounter an error in the code below.

recursive_mutex m_RecurMutex;
condition_variable cond;
unique_lock<recursive_mutex> lock(m_RecurMutex);
cond.wait(lock); // Error Here.

What is the reason causing this error?

score 14 · Answer 1 · edited May 13 '16 at 09:01

14

You should use condition_variable_any instead, the semantics of this version is the same, but it allows all kinds of lock types. The regular condition_variable is however said to be potentially faster.

edited May 13 '16 at 09:01

jotik

17,044
13
58
123

answered Mar 29 '11 at 07:52

Meros

1,278
11
11

score 2 · Accepted Answer · answered Oct 11 '10 at 16:21

2

I assume the error is

mutex.cc: In function ‘int main()’:
mutex.cc:9: error: no matching function for call to ‘boost::condition_variable::wait(boost::unique_lock<boost::recursive_mutex>&)’
/opt/local/include/boost/thread/pthread/condition_variable.hpp:17: note: candidates are: void boost::condition_variable::wait(boost::unique_lock<boost::mutex>&)
i

if not, please correct me. The documentation shows boost::condition_variable::lock takes a boost::unique_lock<boost::mutex> as an argument, not a boost::unique_lock<boost::recursive_mutex> as in your example.

answered Oct 11 '10 at 16:21

Sam Miller

23,808
4
67
87

I thought the boost::recursive_mutex is a specialization of boost::mutex. – nicholas Oct 12 '10 at 10:44
@peterwkc where in the documentation does it say that? – Sam Miller Oct 12 '10 at 19:41
I just assume this is the case. Sorry. – nicholas Oct 14 '10 at 02:10
@peterwkc, no reason to be sorry. We are here to help, good luck! – Sam Miller Oct 14 '10 at 15:11

Boost condition_variable argument error

2 Answers2