Getting ENOMEM with pthread_mutex_init

[Radio młodych bandytów]

On 15/05/2013 23:18, Jilles Tjoelker wrote:
> 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.
> 
Thanks for the suggestion. I just tried it and it didn't help though...
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