tesla_store.c File Reference

Detailed Description

Implementation of tesla_store.

Definition in file tesla_store.c.

#include "tesla_internal.h"
#include <errno.h>

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Functions
pthread_key_t	pthread_key (void)
	The pthreads key used to identify TESLA data. More...
void	tesla_pthread_destructor (void *)
int32_t	tesla_store_get (enum tesla_context context, uint32_t classes, uint32_t instances, tesla_store **storep)
	Retrieve the tesla_store for a context (e.g., a thread). More...
int32_t	tesla_store_init (tesla_store *store, enum tesla_context context, uint32_t classes, uint32_t instances)
	Initialise tesla_store internals. More...
void	tesla_store_free (tesla_store *store)
	Clean up a tesla_store. More...
int32_t	tesla_class_get (tesla_store *store, uint32_t id, tesla_class **tclassp, const char *name, const char *description)
	Retrieve (or create) a tesla_class from a tesla_store. More...

Function Documentation

pthread_key_t pthread_key

(

void

)

The pthreads key used to identify TESLA data.

Definition at line 195 of file tesla_store.c.

References __debug, and tesla_pthread_destructor().

Referenced by tesla_store_get().

{
        // This function is just a singleton accessor.
        static pthread_key_t key;
        static int key_initialised = 0;
        static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;

        // The key, once initialised, is immutable, so it is safe to check and
        // return it without locking. Multiple initialisations are prevented by
        // the critical section below.
        if (key_initialised) return key;

        int error __debug = pthread_mutex_lock(&lock);
        assert(error == 0 && "failed to lock pthread key mutex");

        // Now that we're in the critical section, check again to make sure we
        // initialise the key twice.
        if (key_initialised) return key;

        error = pthread_key_create(&key, tesla_pthread_destructor);
        assert(error == 0 && "failed to create pthread_key_t");

        key_initialised = 1;

        error = pthread_mutex_unlock(&lock);
        assert(error == 0 && "failed to unlock pthread key mutex");

        return key;
}

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void tesla_pthread_destructor

(

void *

x

)

Definition at line 226 of file tesla_store.c.

References tesla_store_free().

Referenced by pthread_key().

{
        tesla_store *store = (tesla_store*) x;
        tesla_store_free(store);
}

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