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/*
* Copyright (C) 2014 Hamburg University of Applied Sciences (HAW)
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
*/
/**
* @ingroup pthread
* @{
* @file
* @brief RIOT POSIX thread local storage
* @author Martin Landsmann <martin.landsmann@haw-hamburg.de>
* @author René Kijewski <rene.kijewski@fu-berlin.de>
*/
#ifndef SYS__POSIX__PTHREAD_TLS__H
#define SYS__POSIX__PTHREAD_TLS__H
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief Internal representation of a thread-specific key.
* @internal
*/
struct __pthread_tls_key;
/**
* @brief A single thread-specific datum.
* @internal
*/
struct __pthread_tls_datum;
/**
* @brief A thread-specific key.
*/
typedef struct __pthread_tls_key *pthread_key_t;
/**
* @brief Returns the requested tls
* @param[in] key the identifier for the requested tls
* @return returns pointer to the storage on success, a 0 value otherwise
*/
void *pthread_getspecific(pthread_key_t key);
/**
* @brief Set and binds a specific tls to a key
* @param[in] key the identifier for the tls
* @param[in] value pointer to the location of the tls
* @return returns 0 on success, an errorcode otherwise
*/
int pthread_setspecific(pthread_key_t key, const void *value);
/**
* @brief Creates a new key to be used to identify a specific tls
* @param[out] key the created key is scribed to the given pointer
* @param[in] destructor function pointer called when non NULL just befor the pthread exits
* @return returns 0 on success, an errorcode otherwise
*/
int pthread_key_create(pthread_key_t *key, void (*destructor)(void *));
/**
* @brief Deletes a pthread_key_t that was previously created with pthread_key_create.
* @details does not call the destructor of the key
* @param[in] key the identifier of the key to be deleted
* @return returns 0 on success, an errorcode otherwise
*/
int pthread_key_delete(pthread_key_t key);
/**
* @brief Destroys all thread-specific keys for pthread `self_id`.
* @param[in] self_id the result of pthread_self().
* @internal
*/
void __pthread_keys_exit(int self_id);
/**
* @brief Returns the pointer to the head of the list of thread-specific data.
* @internal
*/
struct __pthread_tls_datum **__pthread_get_tls_head(int self_id) PURE;
#ifdef __cplusplus
}
#endif
#endif /* SYS__POSIX__PTHREAD_TLS__H */
/**
* @}
*/
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