The mutual exclusion classes of the Boost.Thread library are designed to serialize access to resources shared between C++ threads.
Questions tagged [boost-mutex]
89 questions
3
votes
1 answer
Boost::Mutex in class not thread-safe
I'm learning concurrent programming and what I want to do is have a class where each object it responsible for running its own Boost:Thread. I'm a little over my head with this code because it uses A LOT of functionality that I'm not that…
Sebastian Zander
- 347
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2
votes
2 answers
vector copying and multi-threading : how to ensure multi-read even if occasional writes may happen?
Pseudocode:
Function1_vector_copy () {
vectora = vectorb;
}
Function2_vector_search() {
find k in vectora;
}
The program is multi-threaded. While many threads may search , vector copying is done only by a single thread but at occasional times. The…
King
- 1,170
- 2
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2
votes
1 answer
Why is identifier "MutexType" is undefined?
Attempting to use the boost library to create a system wide mutex from the docs
#include
#include
#include
using…
loaded_dypper
- 262
- 3
- 12
2
votes
2 answers
Why do I need to initialize pthread mutex in C?
I am trying to understand why pthread_mutex_init needs to be called after pthread_mutex_lock.
I wrote a small program that shows that the behavior is weird when pthread_mutex_lock is called before pthread_mutex_init (see below) but I do not…
sirKobz
- 23
- 3
2
votes
4 answers
Std mutex or boost mutex? Which is preferable?
What is the real difference between std::mutex and boost::mutex? Which one is faster in terms of implementation and compilation? Are both of them portable?I read my questions related to it but there is no clear mention of difference . std mutex is…
seilena
- 21
- 1
- 7
2
votes
3 answers
Mutex on part of class
Is it possible to use mutexes on parts of a class ?
Like :
class A{
int a;
int b;
boost::mutex Mutex_for_a;
boost::mutex Mutex_for_b;
}
and then use the right mutex to perform the right operation.
I know this is technically possible…
Indetronable
- 63
- 7
2
votes
1 answer
boost::mutex Release VS Debug Build
I am bulding a PCL based application, for which use the default PCL grabber code for velodyne which can seen here.
When i build my application in Debug mode it's working as per the expectations, but in Release build, clouds are etting skipped and i…
Lakshman ram
- 41
- 1
- 6
2
votes
5 answers
Synchronize writing to log in a multi-threading process
I implemented a Logger, so it can be used like ostream.
e.g, if someone wants to write to the log - he can do something like this:
LOG << "hello world " << 6 << 8.6 << "\n";
The log will be written to the screen, to log file, and to any other…
binyamina
- 173
- 1
- 14
2
votes
5 answers
Using boost::mutex::scoped_lock inside const function
This code won't compile:
class MyClass
{
boost::mutex _mutex;
void foo() const
{
boost::mutex::scoped_lock lock(_mutex);
//critical section
}
}
But defining the function as non const…
Sanich
- 1,739
- 6
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- 43
2
votes
1 answer
confusion over using upgradable lock on std::map's find/insert
Consider a thread-safe getter method in its,relatively, simplest form:
std::map > repo;
AAA & get(const std::string &key)
{
boost::upgrade_lock lock(repoMutex);
std::map
rahman
- 4,820
- 16
- 52
- 86
2
votes
0 answers
Portable c++ boost::iterprocess::mutex, an another try
I was looking for long time around to have portable robust solution for multiprocessing synchronization. Who touche this things know that good solution are boost::iterprocess named
sync objects. But ....
When your process have named_mutex locked and…
Ladislav
- 21
- 2
2
votes
0 answers
Destruction of boost::mutex fails in class destructor
To begin: I have read many posts about the occurence of this error (e.g. boost::mutex::~mutex(): Assertion `!pthread_mutex_destroy(&m)' failed ) and as I can see they do not apply in my case.
Additionally I can not use RAII as often suggested in…
Henkersmann
- 1,190
- 8
- 21
2
votes
0 answers
boost::mutex::lock exception with error number 22
i am working with boost::mutex class to synchronize 2 threads on one resource.
i get an exception when i call the following boost:mutex:lock() function:
lock()
{
int const res=pthread_mutex_lock(&m);
if(res)
{
…
Oded
- 664
- 2
- 9
- 30
2
votes
2 answers
Is there a boost equivalent to this "safe_read" call
I am new to boost threading (came from Win32 threading, which has probably ruined me).
So I'm trying to make a more "RAII" way to check that the working loop should still be going. So I made this simple function:
template
T…
IdeaHat
- 7,641
- 1
- 22
- 53
2
votes
1 answer
Boost: Threading and mutexes in a functor
I'm trying something simple with threads and mutexes in C++ with boost.
This is the code:
#include
#include
class mutex_test
{
private:
boost::mutex mut;
public:
void operator()()
…
Mloc
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- 9