Date: Wed, 15 May 2013 23:18:51 +0200 From: Jilles Tjoelker <jilles@stack.nl> To: Radio =?utf-8?B?bcWCb2R5Y2ggYmFuZHl0w7N3?= <radiomlodychbandytow@o2.pl> Cc: freebsd-threads@freebsd.org Subject: Re: Getting ENOMEM with pthread_mutex_init Message-ID: <20130515211851.GA29110@stack.nl> In-Reply-To: <5184F113.805@o2.pl> References: <5184F113.805@o2.pl>
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On Sat, May 04, 2013 at 01:29:23PM +0200, Radio młodych bandytów wrote:
> I'm having troubles that I seem unable to resolve.
> My programs creates and destroys mutexes repeatably (and, obviously,
> uses them in between). Around the 60th lock created, I always get ENOMEM.
> I have free memory, lots of it. All locks get released properly.
> The relevant pieces of code:
> #define MUTEX pthread_mutex_t
> inline MUTEX create_mutex()
> {
> MUTEX mutex;
> int ret = pthread_mutex_init(&mutex, NULL);
> if(ret != 0)
> throw std::runtime_error("Failed to create a mutex");
> return mutex;
> }
> inline void destroy_mutex(MUTEX *mutex)
> {
> int ret = pthread_mutex_destroy(mutex);
> if(ret != 0)
> throw std::runtime_error("Failed to destroy a mutex");
> }
> Scheduler::Scheduler(char* in,
> char* out,
> BlockInfo* metadata,
> size_t isize,
> size_t block_size,
> size_t iters,
> size_t min_work_size) :
> in(in),
> current_in(in),
> out(out),
> current_out(out),
> metadata(metadata),
> current_metadata(metadata),
> size(isize),
> size_left(isize),
> block_size(block_size),
> iters_left(iters)
> {
> lock = create_mutex();
> work_size = (min_work_size / block_size) * block_size;
> if (work_size < min_work_size)
> work_size += block_size;
> }
> Scheduler::~Scheduler()
> {
> destroy_mutex(&lock);
> }
> Any suggestions?
It is probably not the cause of your problem but using a copy of a
pthread_mutex_t for synchronization is not allowed. pthread_mutex_init()
should be called on the pthread_mutex_t that is part of the Scheduler.
--
Jilles Tjoelker
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