pthread_rwlock_attr.h File Reference

Implementation of a fair, POSIX conforming reader/writer lock (attribute set). More...

Detailed Description

Implementation of a fair, POSIX conforming reader/writer lock (attribute set).

Note

Do not include this header file directly, but pthread.h.

Definition in file pthread_rwlock_attr.h.

#include <errno.h>

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Data Structures
struct	pthread_rwlockattr_t
	Attributes for a new reader/writer lock. More...
int	pthread_rwlockattr_init (pthread_rwlockattr_t *attr)
	Initialize the attribute set with the defaults. More...
int	pthread_rwlockattr_destroy (pthread_rwlockattr_t *attr)
	Destroy an attribute set. More...
int	pthread_rwlockattr_getpshared (const pthread_rwlockattr_t *attr, int *pshared)
	Read whether to share the lock with child processes. More...
int	pthread_rwlockattr_setpshared (pthread_rwlockattr_t *attr, int pshared)
	Set whether to share the lock with child processes. More...

Function Documentation

pthread_rwlockattr_destroy()

int pthread_rwlockattr_destroy

(

pthread_rwlockattr_t *

attr

)

Destroy an attribute set.

This function does nothing, don't bother calling it.

Parameters

[in,out]

attr

Attribute set to destroy.

Returns

0 on success. EINVAL if attr == NULL.

pthread_rwlockattr_getpshared()

int pthread_rwlockattr_getpshared	(	const pthread_rwlockattr_t *	attr,
		int *	pshared
	)

Read whether to share the lock with child processes.

There are not child processes in RIOT.

Parameters

[in]	attr	Attribute set to query.
[out]	pshared	Either PTHREAD_PROCESS_SHARED or PTHREAD_PROCESS_PRIVATE.

Returns

0 on success. EINVAL if attr == NULL.

pthread_rwlockattr_init()

int pthread_rwlockattr_init

(

pthread_rwlockattr_t *

attr

)

Initialize the attribute set with the defaults.

Default value for pshared: PTHREAD_PROCESS_PRIVATE. A zeroed out datum is initialized.

Parameters

[in,out]

attr

Attribute set to initialize.

Returns

0 on success. EINVAL if attr == NULL.

pthread_rwlockattr_setpshared()

int pthread_rwlockattr_setpshared	(	pthread_rwlockattr_t *	attr,
		int	pshared
	)

Set whether to share the lock with child processes.

There are not child processes in RIOT.

Parameters

[in,out]	attr	Attribute set to operate on.
[in]	pshared	Either PTHREAD_PROCESS_SHARED or PTHREAD_PROCESS_PRIVATE.

Returns

0 on success. EINVAL if attr == NULL or a wrong value for pshared was supplied.