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