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

NAME

pthread_rwlock_init - initialize a read/write lock

CONTENTS

Library
Synopsis
Description
Return Values
Errors
See Also
Standards
History
Bugs

LIBRARY


.Lb libc_r
.Lb libpthread
.Lb libthr

SYNOPSIS


.In pthread.h int pthread_rwlock_init "pthread_rwlock_t *lock" "const pthread_rwlockattr_t *attr"

DESCRIPTION

The pthread_rwlock_init function is used to initialize a read/write lock, with attributes specified by attr. If attr is NULL, the default read/write lock attributes are used.

The results of calling pthread_rwlock_init with an already initialized lock are undefined.

RETURN VALUES

If successful, the pthread_rwlock_init function will return zero. Otherwise an error number will be returned to indicate the error.

ERRORS

The pthread_rwlock_init function will fail if:
[EAGAIN]
The system lacked the necessary resources (other than memory) to initialize the lock.
[ENOMEM]
Insufficient memory exists to initialize the lock.
[EPERM]
The caller does not have sufficient privilege to perform the operation.

The pthread_rwlock_init function may fail if:

[EBUSY]
The system has detected an attempt to re-initialize the object referenced by lock, a previously initialized but not yet destroyed read/write lock.
[EINVAL]
The value specified by attr is invalid.

SEE ALSO

pthread_rwlockattr_init(3), pthread_rwlockattr_setpshared(3), pthread_rwlock_destroy(3)

STANDARDS

HISTORY

BUGS


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