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PTHREAD_MUTEXATTR (3) | C library functions | Unix Manual Pages | :man

NAME

pthread_mutexattr_init, pthread_mutexattr_destroy, pthread_mutexattr_setprioceiling, pthread_mutexattr_getprioceiling, pthread_mutexattr_setprotocol, pthread_mutexattr_getprotocol, pthread_mutexattr_settype, pthread_mutexattr_gettype - mutex attribute operations

CONTENTS

Library
Synopsis
Description
Return Values
Errors
See Also
Standards

LIBRARY


.Lb libc_r
.Lb libpthread
.Lb libthr

SYNOPSIS


.In pthread.h int pthread_mutexattr_init "pthread_mutexattr_t *attr" int pthread_mutexattr_destroy "pthread_mutexattr_t *attr" int pthread_mutexattr_setprioceiling "pthread_mutexattr_t *attr" "int prioceiling" int pthread_mutexattr_getprioceiling "pthread_mutexattr_t *attr" "int *prioceiling" int pthread_mutexattr_setprotocol "pthread_mutexattr_t *attr" "int protocol" int pthread_mutexattr_getprotocol "pthread_mutexattr_t *attr" "int *protocol" int pthread_mutexattr_settype "pthread_mutexattr_t *attr" "int type" int pthread_mutexattr_gettype "pthread_mutexattr_t *attr" "int *type"

DESCRIPTION

Mutex attributes are used to specify parameters to pthread_mutex_init. One attribute object can be used in multiple calls to pthread_mutex_init, with or without modifications between calls.

The pthread_mutexattr_init function initializes attr with all the default mutex attributes.

The pthread_mutexattr_destroy function destroys attr.

The pthread_mutexattr_set* functions set the attribute that corresponds to each function name.

The pthread_mutexattr_get* functions copy the value of the attribute that corresponds to each function name to the location pointed to by the second function parameter.

RETURN VALUES

If successful, these functions return 0. Otherwise, an error number is returned to indicate the error.

ERRORS

The pthread_mutexattr_init function will fail if:
[ENOMEM]
Out of memory.

The pthread_mutexattr_destroy function will fail if:

[EINVAL]
Invalid value for attr.

The pthread_mutexattr_setprioceiling function will fail if:

[EINVAL]
Invalid value for attr, or invalid value for prioceiling.

The pthread_mutexattr_getprioceiling function will fail if:

[EINVAL]
Invalid value for attr.

The pthread_mutexattr_setprotocol function will fail if:

[EINVAL]
Invalid value for attr, or invalid value for protocol.

The pthread_mutexattr_getprotocol function will fail if:

[EINVAL]
Invalid value for attr.

The pthread_mutexattr_settype function will fail if:

[EINVAL]
Invalid value for attr, or invalid value for type.

The pthread_mutexattr_gettype function will fail if:

[EINVAL]
Invalid value for attr.

SEE ALSO

pthread_mutex_init(3)

STANDARDS


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