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reseau statique a...
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/*
* Copyright (C) 2014 René Kijewski <rene.kijewski@fu-berlin.de>
*
* 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 Thread creation features (attributes).
* @note Do not include this header file directly, but pthread.h.
*/
#ifndef SYS__POSIX__PTHREAD_THREADING_ATTR__H
#define SYS__POSIX__PTHREAD_THREADING_ATTR__H
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief An attribute set to supply to pthread_create()
* @details A zeroed out datum is default initiliazed.
* @see pthread_create() for further information
*/
typedef struct
{
uint8_t detached; /**< Start in detached state. */
char *ss_sp; /**< Stack to use for new thread. */
size_t ss_size; /**< Size of dynamically allocated stack, or supplied stack, resp. */
} pthread_attr_t;
/**
* @brief This structure is unused right now, and only exists for POSIX compatibility.
*/
struct sched_param {
/** Todo is the greates magician in the land of RIOT */
int todo; /* TODO */
};
#define PTHREAD_CREATE_JOINABLE (0) /**< Create new pthread as joinable (default). */
#define PTHREAD_CREATE_DETACHED (1) /**< Create new pthread in detached state. */
/**
* @brief Initialize attributes for a new pthread.
* @see pthread_create()
* @details A zeroed out `attr` is initialized.
* @param[in,out] attr Structure to initialize
* @returns 0, invocation cannot fail
*/
int pthread_attr_init(pthread_attr_t *attr);
/**
* @brief Destroys an attribute set.
* @details Since pthread_attr_t does not hold dynamic data, this is a no-op.
* @returns 0, since this a no-op that cannot fail
*/
int pthread_attr_destroy(pthread_attr_t *attr);
/**
* @brief Tells whether to create a new pthread in a detached state.
* @param[in] attr Attribute set to query.
* @param[out] detachstate Either PTHREAD_CREATE_JOINABLE or PTHREAD_CREATE_DETACHED.
* @returns 0, the invocation cannot fail
*/
int pthread_attr_getdetachstate(const pthread_attr_t *attr, int *detachstate);
/**
* @brief Sets whether to create a new pthread in a detached state.
* @note Supplying a value different form PTHREAD_CREATE_JOINABLE or PTHREAD_CREATE_DETACHED
* causes undefined behavior.
* @param[in,out] attr Attribute set to operate on.
* @param[in] detachstate Either PTHREAD_CREATE_JOINABLE or PTHREAD_CREATE_DETACHED.
* @returns `0` on success.
* `-1` if you managed to supply an illegal value in `detachstate`.
*/
int pthread_attr_setdetachstate(pthread_attr_t *attr, int detachstate);
/**
* @brief This function is unused right now, and only exists for POSIX compatibility.
* @param[in] attr Unused
* @param[out] guardsize Unused
* @returns -1, this function fails
*/
int pthread_attr_getguardsize(const pthread_attr_t *attr, size_t *guardsize);
/**
* @brief This function is unused right now, and only exists for POSIX compatibility.
* @param[in,out] attr Unused
* @param[in] guardsize Unused
* @returns -1, this function fails
*/
int pthread_attr_setguardsize(pthread_attr_t *attr, size_t guardsize);
/**
* @brief This function is unused right now, and only exists for POSIX compatibility.
* @param[in] attr Unused
* @param[out] param Unused
* @returns -1, this function fails
*/
int pthread_attr_getschedparam(const pthread_attr_t *attr, struct sched_param *param);
/**
* @brief This function is unused right now, and only exists for POSIX compatibility.
* @param[in,out] attr Unused
* @param[in] param Unused
* @returns -1, this function fails
*/
int pthread_attr_setschedparam(pthread_attr_t *attr, const struct sched_param *param);
/**
* @brief This function is unused right now, and only exists for POSIX compatibility.
* @param[in] attr Unused
* @param[out] policy Unused
* @returns -1, this function fails
*/
int pthread_attr_getschedpolicy(const pthread_attr_t *attr, int *policy);
/**
* @brief This function is unused right now, and only exists for POSIX compatibility.
* @param[in,out] attr Unused
* @param[in] policy Unused
* @returns -1, this function fails
*/
int pthread_attr_setschedpolicy(pthread_attr_t *attr, int policy);
/**
* @brief This function is unused right now, and only exists for POSIX compatibility.
* @param[in] attr Unused
* @param[out] inherit Unused
* @returns -1, this function fails
*/
int pthread_attr_getinheritsched(const pthread_attr_t *attr, int *inherit);
/**
* @brief This function is unused right now, and only exists for POSIX compatibility.
* @param[in,out] attr Unused
* @param[in] inherit Unused
* @returns -1, this function fails
*/
int pthread_attr_setinheritsched(pthread_attr_t *attr, int inherit);
/**
* @brief This function is unused right now, and only exists for POSIX compatibility.
* @param[in] attr Unused
* @param[out] scope Unused
* @returns -1, this function fails
*/
int pthread_attr_getscope(const pthread_attr_t *attr, int *scope);
/**
* @brief This function is unused right now, and only exists for POSIX compatibility.
* @param[in,out] attr Unused
* @param[in] scope Unused
* @returns -1, this function fails
*/
int pthread_attr_setscope(pthread_attr_t *attr, int scope);
/**
* @brief Query assigned stack for new pthread.
* @see pthread_attr_setstackaddr() for more information
* @param[in] attr Attribute set to query
* @param[out] stackaddr Pointer to previously assigned stack, or `NULL` for dynamic allocation.
* @returns 0, this invocation cannot fail
*/
int pthread_attr_getstackaddr(const pthread_attr_t *attr, void **stackaddr);
/**
* @brief Set address of the stack to use for the new pthread.
* @details If `*stackaddr == NULL`, then the stack is dynamically allocated with malloc().
* No two running threads may operate on the same stack.
* The stack of a zombie thread (i.e. a non-detached thread that exited but was not yet joined)
* may in theory be reused even before joining, though there might be problems
* if the stack was preempted before pthread_exit() completed.
* @param[in,out] attr Attribute set to operate on.
* @param[in] stackaddr Static stack to use, or `NULL` for dynamic allocation.
* @returns 0, this invocation cannot fail
*/
int pthread_attr_setstackaddr(pthread_attr_t *attr, void *stackaddr);
/**
* @brief Query set stacksize for new pthread.
* @details Returns default stack size of the value is yet unset.
* @param[in] attr Attribute set to query.
* @param[out] stacksize Assigned or default stack size, resp.
* @returns 0, this invocation cannot fail
*/
int pthread_attr_getstacksize(const pthread_attr_t *attr, size_t *stacksize);
/**
* @brief Set the stack size for the new pthread.
* @details If you use pthread_attr_getstackaddr() to assign a static stack,
* then you must use this function to set the size of the stack.
* In case of dynamic memory allocation this overrules the default value.
* @param[in,out] attr Attribute set to operate on
* @param[in] stacksize Size of the stack of the new thread.
* Supply `0` to use the default value.
* @return 0, this invocation cannot fail.
*/
int pthread_attr_setstacksize(pthread_attr_t *attr, size_t stacksize);
#ifdef __cplusplus
}
#endif
#endif /* SYS__POSIX__PTHREAD_THREADING_ATTR__H */
/**
* @}
*/
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