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PTHREAD_MUTEX_INIT(3) FreeBSD Library Functions Manual PTHREAD_MUTEX_INIT(3) NAME pthread_mutex_init - create a mutex LIBRARY POSIX Threads Library (libpthread, -lpthread) SYNOPSIS #include <pthread.h> int pthread_mutex_init(pthread_mutex_t *restrict mutex, const pthread_mutexattr_t *restrict attr); DESCRIPTION The pthread_mutex_init() function creates a new mutex, with attributes specified with attr. If attr is NULL the default attributes are used. RETURN VALUES If successful, pthread_mutex_init() will return zero and put the new mutex id into mutex, otherwise an error number will be returned to indicate the error. ERRORS The pthread_mutex_init() function will fail if: [EINVAL] The value specified by attr is invalid. [ENOMEM] The process cannot allocate enough memory to create another mutex. SEE ALSO pthread_mutex_destroy(3), pthread_mutex_lock(3), pthread_mutex_trylock(3), pthread_mutex_unlock(3), pthread_mutexattr(3) STANDARDS The pthread_mutex_init() function conforms to ISO/IEC 9945-1:1996 ("POSIX.1"). FreeBSD 14.1-RELEASE-p8 August 17, 2018 FreeBSD 14.1-RELEASE-p8